1005 lines
29 KiB
C
1005 lines
29 KiB
C
/*
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* Copyright (c) 2016 Google, Inc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 or later as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/gpio/consumer.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/reset.h>
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#include <linux/sysfs.h>
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#include <linux/thermal.h>
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/* ASPEED PWM & FAN Tach Register Definition */
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#define ASPEED_PTCR_CTRL 0x00
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#define ASPEED_PTCR_CLK_CTRL 0x04
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#define ASPEED_PTCR_DUTY0_CTRL 0x08
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#define ASPEED_PTCR_DUTY1_CTRL 0x0c
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#define ASPEED_PTCR_TYPEM_CTRL 0x10
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#define ASPEED_PTCR_TYPEM_CTRL1 0x14
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#define ASPEED_PTCR_TYPEN_CTRL 0x18
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#define ASPEED_PTCR_TYPEN_CTRL1 0x1c
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#define ASPEED_PTCR_TACH_SOURCE 0x20
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#define ASPEED_PTCR_TRIGGER 0x28
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#define ASPEED_PTCR_RESULT 0x2c
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#define ASPEED_PTCR_INTR_CTRL 0x30
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#define ASPEED_PTCR_INTR_STS 0x34
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#define ASPEED_PTCR_TYPEM_LIMIT 0x38
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#define ASPEED_PTCR_TYPEN_LIMIT 0x3C
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#define ASPEED_PTCR_CTRL_EXT 0x40
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#define ASPEED_PTCR_CLK_CTRL_EXT 0x44
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#define ASPEED_PTCR_DUTY2_CTRL 0x48
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#define ASPEED_PTCR_DUTY3_CTRL 0x4c
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#define ASPEED_PTCR_TYPEO_CTRL 0x50
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#define ASPEED_PTCR_TYPEO_CTRL1 0x54
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#define ASPEED_PTCR_TACH_SOURCE_EXT 0x60
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#define ASPEED_PTCR_TYPEO_LIMIT 0x78
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/* ASPEED_PTCR_CTRL : 0x00 - General Control Register */
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#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1 15
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#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2 6
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#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK (BIT(7) | BIT(15))
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#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1 14
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#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2 5
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#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK (BIT(6) | BIT(14))
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#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1 13
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#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2 4
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#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK (BIT(5) | BIT(13))
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#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1 12
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#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2 3
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#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK (BIT(4) | BIT(12))
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#define ASPEED_PTCR_CTRL_FAN_NUM_EN(x) BIT(16 + (x))
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#define ASPEED_PTCR_CTRL_PWMD_EN BIT(11)
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#define ASPEED_PTCR_CTRL_PWMC_EN BIT(10)
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#define ASPEED_PTCR_CTRL_PWMB_EN BIT(9)
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#define ASPEED_PTCR_CTRL_PWMA_EN BIT(8)
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#define ASPEED_PTCR_CTRL_CLK_SRC BIT(1)
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#define ASPEED_PTCR_CTRL_CLK_EN BIT(0)
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/* ASPEED_PTCR_CLK_CTRL : 0x04 - Clock Control Register */
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/* TYPE N */
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#define ASPEED_PTCR_CLK_CTRL_TYPEN_MASK GENMASK(31, 16)
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#define ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT 24
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#define ASPEED_PTCR_CLK_CTRL_TYPEN_H 20
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#define ASPEED_PTCR_CLK_CTRL_TYPEN_L 16
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/* TYPE M */
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#define ASPEED_PTCR_CLK_CTRL_TYPEM_MASK GENMASK(15, 0)
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#define ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT 8
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#define ASPEED_PTCR_CLK_CTRL_TYPEM_H 4
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#define ASPEED_PTCR_CLK_CTRL_TYPEM_L 0
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/*
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* ASPEED_PTCR_DUTY_CTRL/1/2/3 : 0x08/0x0C/0x48/0x4C - PWM-FAN duty control
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* 0/1/2/3 register
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*/
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#define DUTY_CTRL_PWM2_FALL_POINT 24
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#define DUTY_CTRL_PWM2_RISE_POINT 16
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#define DUTY_CTRL_PWM2_RISE_FALL_MASK GENMASK(31, 16)
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#define DUTY_CTRL_PWM1_FALL_POINT 8
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#define DUTY_CTRL_PWM1_RISE_POINT 0
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#define DUTY_CTRL_PWM1_RISE_FALL_MASK GENMASK(15, 0)
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/* ASPEED_PTCR_TYPEM_CTRL : 0x10/0x18/0x50 - Type M/N/O Ctrl 0 Register */
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#define TYPE_CTRL_FAN_MASK (GENMASK(5, 1) | GENMASK(31, 16))
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#define TYPE_CTRL_FAN1_MASK GENMASK(31, 0)
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#define TYPE_CTRL_FAN_PERIOD 16
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#define TYPE_CTRL_FAN_MODE 4
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#define TYPE_CTRL_FAN_DIVISION 1
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#define TYPE_CTRL_FAN_TYPE_EN 1
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/* ASPEED_PTCR_TACH_SOURCE : 0x20/0x60 - Tach Source Register */
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/* bit [0,1] at 0x20, bit [2] at 0x60 */
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#define TACH_PWM_SOURCE_BIT01(x) ((x) * 2)
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#define TACH_PWM_SOURCE_BIT2(x) ((x) * 2)
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#define TACH_PWM_SOURCE_MASK_BIT01(x) (0x3 << ((x) * 2))
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#define TACH_PWM_SOURCE_MASK_BIT2(x) BIT((x) * 2)
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/* ASPEED_PTCR_RESULT : 0x2c - Result Register */
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#define RESULT_STATUS_MASK BIT(31)
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#define RESULT_VALUE_MASK 0xfffff
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/* ASPEED_PTCR_CTRL_EXT : 0x40 - General Control Extension #1 Register */
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#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1 15
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#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2 6
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#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK (BIT(7) | BIT(15))
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#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1 14
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#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2 5
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#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK (BIT(6) | BIT(14))
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#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1 13
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#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2 4
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#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK (BIT(5) | BIT(13))
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#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1 12
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#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2 3
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#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK (BIT(4) | BIT(12))
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#define ASPEED_PTCR_CTRL_PWMH_EN BIT(11)
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#define ASPEED_PTCR_CTRL_PWMG_EN BIT(10)
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#define ASPEED_PTCR_CTRL_PWMF_EN BIT(9)
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#define ASPEED_PTCR_CTRL_PWME_EN BIT(8)
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/* ASPEED_PTCR_CLK_EXT_CTRL : 0x44 - Clock Control Extension #1 Register */
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/* TYPE O */
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#define ASPEED_PTCR_CLK_CTRL_TYPEO_MASK GENMASK(15, 0)
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#define ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT 8
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#define ASPEED_PTCR_CLK_CTRL_TYPEO_H 4
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#define ASPEED_PTCR_CLK_CTRL_TYPEO_L 0
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#define PWM_MAX 255
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#define BOTH_EDGES 0x02 /* 10b */
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#define M_PWM_DIV_H 0x00
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#define M_PWM_DIV_L 0x05
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#define M_PWM_PERIOD 0x5F
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#define M_TACH_CLK_DIV 0x00
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/*
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* 5:4 Type N fan tach mode selection bit:
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* 00: falling
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* 01: rising
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* 10: both
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* 11: reserved.
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*/
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#define M_TACH_MODE 0x02 /* 10b */
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#define M_TACH_UNIT 0x0210
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#define INIT_FAN_CTRL 0xFF
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/* How long we sleep in us while waiting for an RPM result. */
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#define ASPEED_RPM_STATUS_SLEEP_USEC 500
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#define MAX_CDEV_NAME_LEN 16
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struct aspeed_cooling_device {
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char name[16];
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struct aspeed_pwm_tacho_data *priv;
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struct thermal_cooling_device *tcdev;
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int pwm_port;
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u8 *cooling_levels;
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u8 max_state;
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u8 cur_state;
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};
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struct aspeed_pwm_tacho_data {
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struct regmap *regmap;
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struct reset_control *rst;
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unsigned long clk_freq;
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bool pwm_present[8];
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bool fan_tach_present[16];
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u8 type_pwm_clock_unit[3];
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u8 type_pwm_clock_division_h[3];
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u8 type_pwm_clock_division_l[3];
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u8 type_fan_tach_clock_division[3];
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u8 type_fan_tach_mode[3];
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u16 type_fan_tach_unit[3];
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u8 pwm_port_type[8];
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u8 pwm_port_fan_ctrl[8];
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u8 fan_tach_ch_source[16];
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struct aspeed_cooling_device *cdev[8];
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const struct attribute_group *groups[3];
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};
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enum type { TYPEM, TYPEN, TYPEO };
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struct type_params {
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u32 l_value;
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u32 h_value;
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u32 unit_value;
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u32 clk_ctrl_mask;
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u32 clk_ctrl_reg;
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u32 ctrl_reg;
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u32 ctrl_reg1;
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};
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static const struct type_params type_params[] = {
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[TYPEM] = {
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.l_value = ASPEED_PTCR_CLK_CTRL_TYPEM_L,
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.h_value = ASPEED_PTCR_CLK_CTRL_TYPEM_H,
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.unit_value = ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT,
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.clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEM_MASK,
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.clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL,
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.ctrl_reg = ASPEED_PTCR_TYPEM_CTRL,
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.ctrl_reg1 = ASPEED_PTCR_TYPEM_CTRL1,
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},
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[TYPEN] = {
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.l_value = ASPEED_PTCR_CLK_CTRL_TYPEN_L,
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.h_value = ASPEED_PTCR_CLK_CTRL_TYPEN_H,
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.unit_value = ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT,
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.clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEN_MASK,
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.clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL,
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.ctrl_reg = ASPEED_PTCR_TYPEN_CTRL,
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.ctrl_reg1 = ASPEED_PTCR_TYPEN_CTRL1,
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},
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[TYPEO] = {
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.l_value = ASPEED_PTCR_CLK_CTRL_TYPEO_L,
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.h_value = ASPEED_PTCR_CLK_CTRL_TYPEO_H,
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.unit_value = ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT,
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.clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEO_MASK,
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.clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL_EXT,
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.ctrl_reg = ASPEED_PTCR_TYPEO_CTRL,
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.ctrl_reg1 = ASPEED_PTCR_TYPEO_CTRL1,
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}
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};
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enum pwm_port { PWMA, PWMB, PWMC, PWMD, PWME, PWMF, PWMG, PWMH };
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struct pwm_port_params {
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u32 pwm_en;
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u32 ctrl_reg;
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u32 type_part1;
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u32 type_part2;
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u32 type_mask;
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u32 duty_ctrl_rise_point;
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u32 duty_ctrl_fall_point;
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u32 duty_ctrl_reg;
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u32 duty_ctrl_rise_fall_mask;
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};
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static const struct pwm_port_params pwm_port_params[] = {
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[PWMA] = {
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.pwm_en = ASPEED_PTCR_CTRL_PWMA_EN,
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.ctrl_reg = ASPEED_PTCR_CTRL,
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.type_part1 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1,
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.type_part2 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2,
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.type_mask = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK,
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.duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
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.duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
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.duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL,
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.duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
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},
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[PWMB] = {
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.pwm_en = ASPEED_PTCR_CTRL_PWMB_EN,
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.ctrl_reg = ASPEED_PTCR_CTRL,
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.type_part1 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1,
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.type_part2 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2,
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.type_mask = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK,
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.duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
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.duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
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.duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL,
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.duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
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},
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[PWMC] = {
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.pwm_en = ASPEED_PTCR_CTRL_PWMC_EN,
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.ctrl_reg = ASPEED_PTCR_CTRL,
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.type_part1 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1,
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.type_part2 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2,
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.type_mask = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK,
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.duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
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.duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
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.duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL,
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.duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
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},
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[PWMD] = {
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.pwm_en = ASPEED_PTCR_CTRL_PWMD_EN,
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.ctrl_reg = ASPEED_PTCR_CTRL,
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.type_part1 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1,
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.type_part2 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2,
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.type_mask = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK,
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.duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
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.duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
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.duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL,
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.duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
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},
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[PWME] = {
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.pwm_en = ASPEED_PTCR_CTRL_PWME_EN,
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.ctrl_reg = ASPEED_PTCR_CTRL_EXT,
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.type_part1 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1,
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.type_part2 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2,
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.type_mask = ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK,
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.duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
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.duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
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.duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL,
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.duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
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},
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[PWMF] = {
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.pwm_en = ASPEED_PTCR_CTRL_PWMF_EN,
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.ctrl_reg = ASPEED_PTCR_CTRL_EXT,
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.type_part1 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1,
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.type_part2 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2,
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.type_mask = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK,
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.duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
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.duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
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.duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL,
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.duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
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},
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[PWMG] = {
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.pwm_en = ASPEED_PTCR_CTRL_PWMG_EN,
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.ctrl_reg = ASPEED_PTCR_CTRL_EXT,
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.type_part1 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1,
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.type_part2 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2,
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.type_mask = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK,
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.duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
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.duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
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.duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL,
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.duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
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},
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[PWMH] = {
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.pwm_en = ASPEED_PTCR_CTRL_PWMH_EN,
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.ctrl_reg = ASPEED_PTCR_CTRL_EXT,
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.type_part1 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1,
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.type_part2 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2,
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.type_mask = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK,
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.duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
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.duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
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.duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL,
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.duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
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}
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};
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static int regmap_aspeed_pwm_tacho_reg_write(void *context, unsigned int reg,
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unsigned int val)
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{
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void __iomem *regs = (void __iomem *)context;
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writel(val, regs + reg);
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return 0;
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}
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static int regmap_aspeed_pwm_tacho_reg_read(void *context, unsigned int reg,
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unsigned int *val)
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{
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void __iomem *regs = (void __iomem *)context;
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*val = readl(regs + reg);
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return 0;
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}
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static const struct regmap_config aspeed_pwm_tacho_regmap_config = {
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.reg_bits = 32,
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.val_bits = 32,
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.reg_stride = 4,
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.max_register = ASPEED_PTCR_TYPEO_LIMIT,
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|
.reg_write = regmap_aspeed_pwm_tacho_reg_write,
|
|
.reg_read = regmap_aspeed_pwm_tacho_reg_read,
|
|
.fast_io = true,
|
|
};
|
|
|
|
static void aspeed_set_clock_enable(struct regmap *regmap, bool val)
|
|
{
|
|
regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
|
|
ASPEED_PTCR_CTRL_CLK_EN,
|
|
val ? ASPEED_PTCR_CTRL_CLK_EN : 0);
|
|
}
|
|
|
|
static void aspeed_set_clock_source(struct regmap *regmap, int val)
|
|
{
|
|
regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
|
|
ASPEED_PTCR_CTRL_CLK_SRC,
|
|
val ? ASPEED_PTCR_CTRL_CLK_SRC : 0);
|
|
}
|
|
|
|
static void aspeed_set_pwm_clock_values(struct regmap *regmap, u8 type,
|
|
u8 div_high, u8 div_low, u8 unit)
|
|
{
|
|
u32 reg_value = ((div_high << type_params[type].h_value) |
|
|
(div_low << type_params[type].l_value) |
|
|
(unit << type_params[type].unit_value));
|
|
|
|
regmap_update_bits(regmap, type_params[type].clk_ctrl_reg,
|
|
type_params[type].clk_ctrl_mask, reg_value);
|
|
}
|
|
|
|
static void aspeed_set_pwm_port_enable(struct regmap *regmap, u8 pwm_port,
|
|
bool enable)
|
|
{
|
|
regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg,
|
|
pwm_port_params[pwm_port].pwm_en,
|
|
enable ? pwm_port_params[pwm_port].pwm_en : 0);
|
|
}
|
|
|
|
static void aspeed_set_pwm_port_type(struct regmap *regmap,
|
|
u8 pwm_port, u8 type)
|
|
{
|
|
u32 reg_value = (type & 0x1) << pwm_port_params[pwm_port].type_part1;
|
|
|
|
reg_value |= (type & 0x2) << pwm_port_params[pwm_port].type_part2;
|
|
|
|
regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg,
|
|
pwm_port_params[pwm_port].type_mask, reg_value);
|
|
}
|
|
|
|
static void aspeed_set_pwm_port_duty_rising_falling(struct regmap *regmap,
|
|
u8 pwm_port, u8 rising,
|
|
u8 falling)
|
|
{
|
|
u32 reg_value = (rising <<
|
|
pwm_port_params[pwm_port].duty_ctrl_rise_point);
|
|
reg_value |= (falling <<
|
|
pwm_port_params[pwm_port].duty_ctrl_fall_point);
|
|
|
|
regmap_update_bits(regmap, pwm_port_params[pwm_port].duty_ctrl_reg,
|
|
pwm_port_params[pwm_port].duty_ctrl_rise_fall_mask,
|
|
reg_value);
|
|
}
|
|
|
|
static void aspeed_set_tacho_type_enable(struct regmap *regmap, u8 type,
|
|
bool enable)
|
|
{
|
|
regmap_update_bits(regmap, type_params[type].ctrl_reg,
|
|
TYPE_CTRL_FAN_TYPE_EN,
|
|
enable ? TYPE_CTRL_FAN_TYPE_EN : 0);
|
|
}
|
|
|
|
static void aspeed_set_tacho_type_values(struct regmap *regmap, u8 type,
|
|
u8 mode, u16 unit, u8 division)
|
|
{
|
|
u32 reg_value = ((mode << TYPE_CTRL_FAN_MODE) |
|
|
(unit << TYPE_CTRL_FAN_PERIOD) |
|
|
(division << TYPE_CTRL_FAN_DIVISION));
|
|
|
|
regmap_update_bits(regmap, type_params[type].ctrl_reg,
|
|
TYPE_CTRL_FAN_MASK, reg_value);
|
|
regmap_update_bits(regmap, type_params[type].ctrl_reg1,
|
|
TYPE_CTRL_FAN1_MASK, unit << 16);
|
|
}
|
|
|
|
static void aspeed_set_fan_tach_ch_enable(struct regmap *regmap, u8 fan_tach_ch,
|
|
bool enable)
|
|
{
|
|
regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
|
|
ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch),
|
|
enable ?
|
|
ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch) : 0);
|
|
}
|
|
|
|
static void aspeed_set_fan_tach_ch_source(struct regmap *regmap, u8 fan_tach_ch,
|
|
u8 fan_tach_ch_source)
|
|
{
|
|
u32 reg_value1 = ((fan_tach_ch_source & 0x3) <<
|
|
TACH_PWM_SOURCE_BIT01(fan_tach_ch));
|
|
u32 reg_value2 = (((fan_tach_ch_source & 0x4) >> 2) <<
|
|
TACH_PWM_SOURCE_BIT2(fan_tach_ch));
|
|
|
|
regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE,
|
|
TACH_PWM_SOURCE_MASK_BIT01(fan_tach_ch),
|
|
reg_value1);
|
|
|
|
regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE_EXT,
|
|
TACH_PWM_SOURCE_MASK_BIT2(fan_tach_ch),
|
|
reg_value2);
|
|
}
|
|
|
|
static void aspeed_set_pwm_port_fan_ctrl(struct aspeed_pwm_tacho_data *priv,
|
|
u8 index, u8 fan_ctrl)
|
|
{
|
|
u16 period, dc_time_on;
|
|
|
|
period = priv->type_pwm_clock_unit[priv->pwm_port_type[index]];
|
|
period += 1;
|
|
dc_time_on = (fan_ctrl * period) / PWM_MAX;
|
|
|
|
if (dc_time_on == 0) {
|
|
aspeed_set_pwm_port_enable(priv->regmap, index, false);
|
|
} else {
|
|
if (dc_time_on == period)
|
|
dc_time_on = 0;
|
|
|
|
aspeed_set_pwm_port_duty_rising_falling(priv->regmap, index, 0,
|
|
dc_time_on);
|
|
aspeed_set_pwm_port_enable(priv->regmap, index, true);
|
|
}
|
|
}
|
|
|
|
static u32 aspeed_get_fan_tach_ch_measure_period(struct aspeed_pwm_tacho_data
|
|
*priv, u8 type)
|
|
{
|
|
u32 clk;
|
|
u16 tacho_unit;
|
|
u8 clk_unit, div_h, div_l, tacho_div;
|
|
|
|
clk = priv->clk_freq;
|
|
clk_unit = priv->type_pwm_clock_unit[type];
|
|
div_h = priv->type_pwm_clock_division_h[type];
|
|
div_h = 0x1 << div_h;
|
|
div_l = priv->type_pwm_clock_division_l[type];
|
|
if (div_l == 0)
|
|
div_l = 1;
|
|
else
|
|
div_l = div_l * 2;
|
|
|
|
tacho_unit = priv->type_fan_tach_unit[type];
|
|
tacho_div = priv->type_fan_tach_clock_division[type];
|
|
|
|
tacho_div = 0x4 << (tacho_div * 2);
|
|
return clk / (clk_unit * div_h * div_l * tacho_div * tacho_unit);
|
|
}
|
|
|
|
static int aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv,
|
|
u8 fan_tach_ch)
|
|
{
|
|
u32 raw_data, tach_div, clk_source, msec, usec, val;
|
|
u8 fan_tach_ch_source, type, mode, both;
|
|
int ret;
|
|
|
|
regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0);
|
|
regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch);
|
|
|
|
fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch];
|
|
type = priv->pwm_port_type[fan_tach_ch_source];
|
|
|
|
msec = (1000 / aspeed_get_fan_tach_ch_measure_period(priv, type));
|
|
usec = msec * 1000;
|
|
|
|
ret = regmap_read_poll_timeout(
|
|
priv->regmap,
|
|
ASPEED_PTCR_RESULT,
|
|
val,
|
|
(val & RESULT_STATUS_MASK),
|
|
ASPEED_RPM_STATUS_SLEEP_USEC,
|
|
usec);
|
|
|
|
/* return -ETIMEDOUT if we didn't get an answer. */
|
|
if (ret)
|
|
return ret;
|
|
|
|
raw_data = val & RESULT_VALUE_MASK;
|
|
tach_div = priv->type_fan_tach_clock_division[type];
|
|
/*
|
|
* We need the mode to determine if the raw_data is double (from
|
|
* counting both edges).
|
|
*/
|
|
mode = priv->type_fan_tach_mode[type];
|
|
both = (mode & BOTH_EDGES) ? 1 : 0;
|
|
|
|
tach_div = (0x4 << both) << (tach_div * 2);
|
|
clk_source = priv->clk_freq;
|
|
|
|
if (raw_data == 0)
|
|
return 0;
|
|
|
|
return (clk_source * 60) / (2 * raw_data * tach_div);
|
|
}
|
|
|
|
static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int index = sensor_attr->index;
|
|
int ret;
|
|
struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
|
|
long fan_ctrl;
|
|
|
|
ret = kstrtol(buf, 10, &fan_ctrl);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
if (fan_ctrl < 0 || fan_ctrl > PWM_MAX)
|
|
return -EINVAL;
|
|
|
|
if (priv->pwm_port_fan_ctrl[index] == fan_ctrl)
|
|
return count;
|
|
|
|
priv->pwm_port_fan_ctrl[index] = fan_ctrl;
|
|
aspeed_set_pwm_port_fan_ctrl(priv, index, fan_ctrl);
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int index = sensor_attr->index;
|
|
struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%u\n", priv->pwm_port_fan_ctrl[index]);
|
|
}
|
|
|
|
static ssize_t show_rpm(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int index = sensor_attr->index;
|
|
int rpm;
|
|
struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
|
|
|
|
rpm = aspeed_get_fan_tach_ch_rpm(priv, index);
|
|
if (rpm < 0)
|
|
return rpm;
|
|
|
|
return sprintf(buf, "%d\n", rpm);
|
|
}
|
|
|
|
static umode_t pwm_is_visible(struct kobject *kobj,
|
|
struct attribute *a, int index)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
|
|
|
|
if (!priv->pwm_present[index])
|
|
return 0;
|
|
return a->mode;
|
|
}
|
|
|
|
static umode_t fan_dev_is_visible(struct kobject *kobj,
|
|
struct attribute *a, int index)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
|
|
|
|
if (!priv->fan_tach_present[index])
|
|
return 0;
|
|
return a->mode;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm1, 0644,
|
|
show_pwm, set_pwm, 0);
|
|
static SENSOR_DEVICE_ATTR(pwm2, 0644,
|
|
show_pwm, set_pwm, 1);
|
|
static SENSOR_DEVICE_ATTR(pwm3, 0644,
|
|
show_pwm, set_pwm, 2);
|
|
static SENSOR_DEVICE_ATTR(pwm4, 0644,
|
|
show_pwm, set_pwm, 3);
|
|
static SENSOR_DEVICE_ATTR(pwm5, 0644,
|
|
show_pwm, set_pwm, 4);
|
|
static SENSOR_DEVICE_ATTR(pwm6, 0644,
|
|
show_pwm, set_pwm, 5);
|
|
static SENSOR_DEVICE_ATTR(pwm7, 0644,
|
|
show_pwm, set_pwm, 6);
|
|
static SENSOR_DEVICE_ATTR(pwm8, 0644,
|
|
show_pwm, set_pwm, 7);
|
|
static struct attribute *pwm_dev_attrs[] = {
|
|
&sensor_dev_attr_pwm1.dev_attr.attr,
|
|
&sensor_dev_attr_pwm2.dev_attr.attr,
|
|
&sensor_dev_attr_pwm3.dev_attr.attr,
|
|
&sensor_dev_attr_pwm4.dev_attr.attr,
|
|
&sensor_dev_attr_pwm5.dev_attr.attr,
|
|
&sensor_dev_attr_pwm6.dev_attr.attr,
|
|
&sensor_dev_attr_pwm7.dev_attr.attr,
|
|
&sensor_dev_attr_pwm8.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group pwm_dev_group = {
|
|
.attrs = pwm_dev_attrs,
|
|
.is_visible = pwm_is_visible,
|
|
};
|
|
|
|
static SENSOR_DEVICE_ATTR(fan1_input, 0444,
|
|
show_rpm, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(fan2_input, 0444,
|
|
show_rpm, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(fan3_input, 0444,
|
|
show_rpm, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(fan4_input, 0444,
|
|
show_rpm, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR(fan5_input, 0444,
|
|
show_rpm, NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(fan6_input, 0444,
|
|
show_rpm, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(fan7_input, 0444,
|
|
show_rpm, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(fan8_input, 0444,
|
|
show_rpm, NULL, 7);
|
|
static SENSOR_DEVICE_ATTR(fan9_input, 0444,
|
|
show_rpm, NULL, 8);
|
|
static SENSOR_DEVICE_ATTR(fan10_input, 0444,
|
|
show_rpm, NULL, 9);
|
|
static SENSOR_DEVICE_ATTR(fan11_input, 0444,
|
|
show_rpm, NULL, 10);
|
|
static SENSOR_DEVICE_ATTR(fan12_input, 0444,
|
|
show_rpm, NULL, 11);
|
|
static SENSOR_DEVICE_ATTR(fan13_input, 0444,
|
|
show_rpm, NULL, 12);
|
|
static SENSOR_DEVICE_ATTR(fan14_input, 0444,
|
|
show_rpm, NULL, 13);
|
|
static SENSOR_DEVICE_ATTR(fan15_input, 0444,
|
|
show_rpm, NULL, 14);
|
|
static SENSOR_DEVICE_ATTR(fan16_input, 0444,
|
|
show_rpm, NULL, 15);
|
|
static struct attribute *fan_dev_attrs[] = {
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan3_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan4_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan5_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan6_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan7_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan8_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan9_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan10_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan11_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan12_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan13_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan14_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan15_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan16_input.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group fan_dev_group = {
|
|
.attrs = fan_dev_attrs,
|
|
.is_visible = fan_dev_is_visible,
|
|
};
|
|
|
|
/*
|
|
* The clock type is type M :
|
|
* The PWM frequency = 24MHz / (type M clock division L bit *
|
|
* type M clock division H bit * (type M PWM period bit + 1))
|
|
*/
|
|
static void aspeed_create_type(struct aspeed_pwm_tacho_data *priv)
|
|
{
|
|
priv->type_pwm_clock_division_h[TYPEM] = M_PWM_DIV_H;
|
|
priv->type_pwm_clock_division_l[TYPEM] = M_PWM_DIV_L;
|
|
priv->type_pwm_clock_unit[TYPEM] = M_PWM_PERIOD;
|
|
aspeed_set_pwm_clock_values(priv->regmap, TYPEM, M_PWM_DIV_H,
|
|
M_PWM_DIV_L, M_PWM_PERIOD);
|
|
aspeed_set_tacho_type_enable(priv->regmap, TYPEM, true);
|
|
priv->type_fan_tach_clock_division[TYPEM] = M_TACH_CLK_DIV;
|
|
priv->type_fan_tach_unit[TYPEM] = M_TACH_UNIT;
|
|
priv->type_fan_tach_mode[TYPEM] = M_TACH_MODE;
|
|
aspeed_set_tacho_type_values(priv->regmap, TYPEM, M_TACH_MODE,
|
|
M_TACH_UNIT, M_TACH_CLK_DIV);
|
|
}
|
|
|
|
static void aspeed_create_pwm_port(struct aspeed_pwm_tacho_data *priv,
|
|
u8 pwm_port)
|
|
{
|
|
aspeed_set_pwm_port_enable(priv->regmap, pwm_port, true);
|
|
priv->pwm_present[pwm_port] = true;
|
|
|
|
priv->pwm_port_type[pwm_port] = TYPEM;
|
|
aspeed_set_pwm_port_type(priv->regmap, pwm_port, TYPEM);
|
|
|
|
priv->pwm_port_fan_ctrl[pwm_port] = INIT_FAN_CTRL;
|
|
aspeed_set_pwm_port_fan_ctrl(priv, pwm_port, INIT_FAN_CTRL);
|
|
}
|
|
|
|
static void aspeed_create_fan_tach_channel(struct aspeed_pwm_tacho_data *priv,
|
|
u8 *fan_tach_ch,
|
|
int count,
|
|
u8 pwm_source)
|
|
{
|
|
u8 val, index;
|
|
|
|
for (val = 0; val < count; val++) {
|
|
index = fan_tach_ch[val];
|
|
aspeed_set_fan_tach_ch_enable(priv->regmap, index, true);
|
|
priv->fan_tach_present[index] = true;
|
|
priv->fan_tach_ch_source[index] = pwm_source;
|
|
aspeed_set_fan_tach_ch_source(priv->regmap, index, pwm_source);
|
|
}
|
|
}
|
|
|
|
static int
|
|
aspeed_pwm_cz_get_max_state(struct thermal_cooling_device *tcdev,
|
|
unsigned long *state)
|
|
{
|
|
struct aspeed_cooling_device *cdev = tcdev->devdata;
|
|
|
|
*state = cdev->max_state;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
aspeed_pwm_cz_get_cur_state(struct thermal_cooling_device *tcdev,
|
|
unsigned long *state)
|
|
{
|
|
struct aspeed_cooling_device *cdev = tcdev->devdata;
|
|
|
|
*state = cdev->cur_state;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
aspeed_pwm_cz_set_cur_state(struct thermal_cooling_device *tcdev,
|
|
unsigned long state)
|
|
{
|
|
struct aspeed_cooling_device *cdev = tcdev->devdata;
|
|
|
|
if (state > cdev->max_state)
|
|
return -EINVAL;
|
|
|
|
cdev->cur_state = state;
|
|
cdev->priv->pwm_port_fan_ctrl[cdev->pwm_port] =
|
|
cdev->cooling_levels[cdev->cur_state];
|
|
aspeed_set_pwm_port_fan_ctrl(cdev->priv, cdev->pwm_port,
|
|
cdev->cooling_levels[cdev->cur_state]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct thermal_cooling_device_ops aspeed_pwm_cool_ops = {
|
|
.get_max_state = aspeed_pwm_cz_get_max_state,
|
|
.get_cur_state = aspeed_pwm_cz_get_cur_state,
|
|
.set_cur_state = aspeed_pwm_cz_set_cur_state,
|
|
};
|
|
|
|
static int aspeed_create_pwm_cooling(struct device *dev,
|
|
struct device_node *child,
|
|
struct aspeed_pwm_tacho_data *priv,
|
|
u32 pwm_port, u8 num_levels)
|
|
{
|
|
int ret;
|
|
struct aspeed_cooling_device *cdev;
|
|
|
|
cdev = devm_kzalloc(dev, sizeof(*cdev), GFP_KERNEL);
|
|
|
|
if (!cdev)
|
|
return -ENOMEM;
|
|
|
|
cdev->cooling_levels = devm_kzalloc(dev, num_levels, GFP_KERNEL);
|
|
if (!cdev->cooling_levels)
|
|
return -ENOMEM;
|
|
|
|
cdev->max_state = num_levels - 1;
|
|
ret = of_property_read_u8_array(child, "cooling-levels",
|
|
cdev->cooling_levels,
|
|
num_levels);
|
|
if (ret) {
|
|
dev_err(dev, "Property 'cooling-levels' cannot be read.\n");
|
|
return ret;
|
|
}
|
|
snprintf(cdev->name, MAX_CDEV_NAME_LEN, "%pOFn%d", child, pwm_port);
|
|
|
|
cdev->tcdev = thermal_of_cooling_device_register(child,
|
|
cdev->name,
|
|
cdev,
|
|
&aspeed_pwm_cool_ops);
|
|
if (IS_ERR(cdev->tcdev))
|
|
return PTR_ERR(cdev->tcdev);
|
|
|
|
cdev->priv = priv;
|
|
cdev->pwm_port = pwm_port;
|
|
|
|
priv->cdev[pwm_port] = cdev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int aspeed_create_fan(struct device *dev,
|
|
struct device_node *child,
|
|
struct aspeed_pwm_tacho_data *priv)
|
|
{
|
|
u8 *fan_tach_ch;
|
|
u32 pwm_port;
|
|
int ret, count;
|
|
|
|
ret = of_property_read_u32(child, "reg", &pwm_port);
|
|
if (ret)
|
|
return ret;
|
|
aspeed_create_pwm_port(priv, (u8)pwm_port);
|
|
|
|
ret = of_property_count_u8_elems(child, "cooling-levels");
|
|
|
|
if (ret > 0) {
|
|
ret = aspeed_create_pwm_cooling(dev, child, priv, pwm_port,
|
|
ret);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
count = of_property_count_u8_elems(child, "aspeed,fan-tach-ch");
|
|
if (count < 1)
|
|
return -EINVAL;
|
|
fan_tach_ch = devm_kcalloc(dev, count, sizeof(*fan_tach_ch),
|
|
GFP_KERNEL);
|
|
if (!fan_tach_ch)
|
|
return -ENOMEM;
|
|
ret = of_property_read_u8_array(child, "aspeed,fan-tach-ch",
|
|
fan_tach_ch, count);
|
|
if (ret)
|
|
return ret;
|
|
aspeed_create_fan_tach_channel(priv, fan_tach_ch, count, pwm_port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void aspeed_pwm_tacho_remove(void *data)
|
|
{
|
|
struct aspeed_pwm_tacho_data *priv = data;
|
|
|
|
reset_control_assert(priv->rst);
|
|
}
|
|
|
|
static int aspeed_pwm_tacho_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct device_node *np, *child;
|
|
struct aspeed_pwm_tacho_data *priv;
|
|
void __iomem *regs;
|
|
struct resource *res;
|
|
struct device *hwmon;
|
|
struct clk *clk;
|
|
int ret;
|
|
|
|
np = dev->of_node;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res)
|
|
return -ENOENT;
|
|
regs = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(regs))
|
|
return PTR_ERR(regs);
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
priv->regmap = devm_regmap_init(dev, NULL, (__force void *)regs,
|
|
&aspeed_pwm_tacho_regmap_config);
|
|
if (IS_ERR(priv->regmap))
|
|
return PTR_ERR(priv->regmap);
|
|
|
|
priv->rst = devm_reset_control_get_exclusive(dev, NULL);
|
|
if (IS_ERR(priv->rst)) {
|
|
dev_err(dev,
|
|
"missing or invalid reset controller device tree entry");
|
|
return PTR_ERR(priv->rst);
|
|
}
|
|
reset_control_deassert(priv->rst);
|
|
|
|
ret = devm_add_action_or_reset(dev, aspeed_pwm_tacho_remove, priv);
|
|
if (ret)
|
|
return ret;
|
|
|
|
regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE, 0);
|
|
regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE_EXT, 0);
|
|
|
|
clk = devm_clk_get(dev, NULL);
|
|
if (IS_ERR(clk))
|
|
return -ENODEV;
|
|
priv->clk_freq = clk_get_rate(clk);
|
|
aspeed_set_clock_enable(priv->regmap, true);
|
|
aspeed_set_clock_source(priv->regmap, 0);
|
|
|
|
aspeed_create_type(priv);
|
|
|
|
for_each_child_of_node(np, child) {
|
|
ret = aspeed_create_fan(dev, child, priv);
|
|
if (ret) {
|
|
of_node_put(child);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
priv->groups[0] = &pwm_dev_group;
|
|
priv->groups[1] = &fan_dev_group;
|
|
priv->groups[2] = NULL;
|
|
hwmon = devm_hwmon_device_register_with_groups(dev,
|
|
"aspeed_pwm_tacho",
|
|
priv, priv->groups);
|
|
return PTR_ERR_OR_ZERO(hwmon);
|
|
}
|
|
|
|
static const struct of_device_id of_pwm_tacho_match_table[] = {
|
|
{ .compatible = "aspeed,ast2400-pwm-tacho", },
|
|
{ .compatible = "aspeed,ast2500-pwm-tacho", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_pwm_tacho_match_table);
|
|
|
|
static struct platform_driver aspeed_pwm_tacho_driver = {
|
|
.probe = aspeed_pwm_tacho_probe,
|
|
.driver = {
|
|
.name = "aspeed_pwm_tacho",
|
|
.of_match_table = of_pwm_tacho_match_table,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(aspeed_pwm_tacho_driver);
|
|
|
|
MODULE_AUTHOR("Jaghathiswari Rankappagounder Natarajan <jaghu@google.com>");
|
|
MODULE_DESCRIPTION("ASPEED PWM and Fan Tacho device driver");
|
|
MODULE_LICENSE("GPL");
|