2018-01-06 08:09:26 +08:00
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// SPDX-License-Identifier: (GPL-2.0 OR MIT)
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/*
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* Microsemi SoCs pinctrl driver
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*
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* Author: <alexandre.belloni@free-electrons.com>
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* License: Dual MIT/GPL
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* Copyright (c) 2017 Microsemi Corporation
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*/
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#include <linux/gpio/driver.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/of_device.h>
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2018-07-25 20:26:21 +08:00
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#include <linux/of_irq.h>
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2018-01-06 08:09:26 +08:00
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#include <linux/of_platform.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/pinctrl/pinconf-generic.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include "core.h"
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#include "pinconf.h"
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#include "pinmux.h"
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#define OCELOT_GPIO_OUT_SET 0x0
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#define OCELOT_GPIO_OUT_CLR 0x4
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#define OCELOT_GPIO_OUT 0x8
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#define OCELOT_GPIO_IN 0xc
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#define OCELOT_GPIO_OE 0x10
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#define OCELOT_GPIO_INTR 0x14
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#define OCELOT_GPIO_INTR_ENA 0x18
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#define OCELOT_GPIO_INTR_IDENT 0x1c
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#define OCELOT_GPIO_ALT0 0x20
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#define OCELOT_GPIO_ALT1 0x24
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#define OCELOT_GPIO_SD_MAP 0x28
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#define OCELOT_PINS 22
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#define OCELOT_FUNC_PER_PIN 4
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enum {
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FUNC_NONE,
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FUNC_GPIO,
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FUNC_IRQ0_IN,
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FUNC_IRQ0_OUT,
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FUNC_IRQ1_IN,
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FUNC_IRQ1_OUT,
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FUNC_MIIM1,
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FUNC_PCI_WAKE,
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FUNC_PTP0,
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FUNC_PTP1,
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FUNC_PTP2,
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FUNC_PTP3,
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FUNC_PWM,
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FUNC_RECO_CLK0,
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FUNC_RECO_CLK1,
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FUNC_SFP0,
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FUNC_SFP1,
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FUNC_SFP2,
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FUNC_SFP3,
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FUNC_SFP4,
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FUNC_SFP5,
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FUNC_SG0,
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FUNC_SI,
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FUNC_TACHO,
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FUNC_TWI,
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FUNC_TWI_SCL_M,
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FUNC_UART,
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FUNC_UART2,
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FUNC_MAX
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};
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static const char *const ocelot_function_names[] = {
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[FUNC_NONE] = "none",
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[FUNC_GPIO] = "gpio",
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[FUNC_IRQ0_IN] = "irq0_in",
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[FUNC_IRQ0_OUT] = "irq0_out",
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[FUNC_IRQ1_IN] = "irq1_in",
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[FUNC_IRQ1_OUT] = "irq1_out",
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[FUNC_MIIM1] = "miim1",
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[FUNC_PCI_WAKE] = "pci_wake",
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[FUNC_PTP0] = "ptp0",
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[FUNC_PTP1] = "ptp1",
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[FUNC_PTP2] = "ptp2",
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[FUNC_PTP3] = "ptp3",
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[FUNC_PWM] = "pwm",
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[FUNC_RECO_CLK0] = "reco_clk0",
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[FUNC_RECO_CLK1] = "reco_clk1",
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[FUNC_SFP0] = "sfp0",
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[FUNC_SFP1] = "sfp1",
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[FUNC_SFP2] = "sfp2",
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[FUNC_SFP3] = "sfp3",
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[FUNC_SFP4] = "sfp4",
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[FUNC_SFP5] = "sfp5",
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[FUNC_SG0] = "sg0",
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[FUNC_SI] = "si",
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[FUNC_TACHO] = "tacho",
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[FUNC_TWI] = "twi",
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[FUNC_TWI_SCL_M] = "twi_scl_m",
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[FUNC_UART] = "uart",
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[FUNC_UART2] = "uart2",
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};
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struct ocelot_pmx_func {
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const char **groups;
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unsigned int ngroups;
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};
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struct ocelot_pin_caps {
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unsigned int pin;
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unsigned char functions[OCELOT_FUNC_PER_PIN];
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};
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struct ocelot_pinctrl {
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struct device *dev;
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struct pinctrl_dev *pctl;
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struct gpio_chip gpio_chip;
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struct regmap *map;
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struct ocelot_pmx_func func[FUNC_MAX];
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};
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#define OCELOT_P(p, f0, f1, f2) \
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static struct ocelot_pin_caps ocelot_pin_##p = { \
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.pin = p, \
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.functions = { \
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FUNC_GPIO, FUNC_##f0, FUNC_##f1, FUNC_##f2, \
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}, \
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}
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OCELOT_P(0, SG0, NONE, NONE);
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OCELOT_P(1, SG0, NONE, NONE);
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OCELOT_P(2, SG0, NONE, NONE);
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OCELOT_P(3, SG0, NONE, NONE);
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2018-07-11 21:01:26 +08:00
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OCELOT_P(4, IRQ0_IN, IRQ0_OUT, TWI_SCL_M);
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2018-01-06 08:09:26 +08:00
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OCELOT_P(5, IRQ1_IN, IRQ1_OUT, PCI_WAKE);
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OCELOT_P(6, UART, TWI_SCL_M, NONE);
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OCELOT_P(7, UART, TWI_SCL_M, NONE);
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OCELOT_P(8, SI, TWI_SCL_M, IRQ0_OUT);
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OCELOT_P(9, SI, TWI_SCL_M, IRQ1_OUT);
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OCELOT_P(10, PTP2, TWI_SCL_M, SFP0);
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OCELOT_P(11, PTP3, TWI_SCL_M, SFP1);
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OCELOT_P(12, UART2, TWI_SCL_M, SFP2);
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OCELOT_P(13, UART2, TWI_SCL_M, SFP3);
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OCELOT_P(14, MIIM1, TWI_SCL_M, SFP4);
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OCELOT_P(15, MIIM1, TWI_SCL_M, SFP5);
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OCELOT_P(16, TWI, NONE, SI);
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OCELOT_P(17, TWI, TWI_SCL_M, SI);
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OCELOT_P(18, PTP0, TWI_SCL_M, NONE);
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OCELOT_P(19, PTP1, TWI_SCL_M, NONE);
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OCELOT_P(20, RECO_CLK0, TACHO, NONE);
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OCELOT_P(21, RECO_CLK1, PWM, NONE);
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#define OCELOT_PIN(n) { \
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.number = n, \
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.name = "GPIO_"#n, \
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.drv_data = &ocelot_pin_##n \
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}
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static const struct pinctrl_pin_desc ocelot_pins[] = {
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OCELOT_PIN(0),
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OCELOT_PIN(1),
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OCELOT_PIN(2),
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OCELOT_PIN(3),
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OCELOT_PIN(4),
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OCELOT_PIN(5),
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OCELOT_PIN(6),
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OCELOT_PIN(7),
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OCELOT_PIN(8),
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OCELOT_PIN(9),
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OCELOT_PIN(10),
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OCELOT_PIN(11),
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OCELOT_PIN(12),
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OCELOT_PIN(13),
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OCELOT_PIN(14),
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OCELOT_PIN(15),
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OCELOT_PIN(16),
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OCELOT_PIN(17),
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OCELOT_PIN(18),
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OCELOT_PIN(19),
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OCELOT_PIN(20),
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OCELOT_PIN(21),
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};
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static int ocelot_get_functions_count(struct pinctrl_dev *pctldev)
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{
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return ARRAY_SIZE(ocelot_function_names);
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}
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static const char *ocelot_get_function_name(struct pinctrl_dev *pctldev,
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unsigned int function)
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{
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return ocelot_function_names[function];
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}
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static int ocelot_get_function_groups(struct pinctrl_dev *pctldev,
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unsigned int function,
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const char *const **groups,
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unsigned *const num_groups)
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{
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struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
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*groups = info->func[function].groups;
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*num_groups = info->func[function].ngroups;
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return 0;
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}
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static int ocelot_pin_function_idx(unsigned int pin, unsigned int function)
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{
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struct ocelot_pin_caps *p = ocelot_pins[pin].drv_data;
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int i;
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for (i = 0; i < OCELOT_FUNC_PER_PIN; i++) {
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if (function == p->functions[i])
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return i;
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}
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return -1;
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}
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static int ocelot_pinmux_set_mux(struct pinctrl_dev *pctldev,
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unsigned int selector, unsigned int group)
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{
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struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
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struct ocelot_pin_caps *pin = ocelot_pins[group].drv_data;
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int f;
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f = ocelot_pin_function_idx(group, selector);
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if (f < 0)
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return -EINVAL;
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/*
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* f is encoded on two bits.
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* bit 0 of f goes in BIT(pin) of ALT0, bit 1 of f goes in BIT(pin) of
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* ALT1
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* This is racy because both registers can't be updated at the same time
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* but it doesn't matter much for now.
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*/
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regmap_update_bits(info->map, OCELOT_GPIO_ALT0, BIT(pin->pin),
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f << pin->pin);
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regmap_update_bits(info->map, OCELOT_GPIO_ALT1, BIT(pin->pin),
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f << (pin->pin - 1));
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return 0;
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}
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static int ocelot_gpio_set_direction(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned int pin, bool input)
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{
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struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
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regmap_update_bits(info->map, OCELOT_GPIO_OE, BIT(pin),
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2018-03-22 20:35:00 +08:00
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input ? 0 : BIT(pin));
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2018-01-06 08:09:26 +08:00
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return 0;
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}
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static int ocelot_gpio_request_enable(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned int offset)
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{
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struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
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regmap_update_bits(info->map, OCELOT_GPIO_ALT0, BIT(offset), 0);
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regmap_update_bits(info->map, OCELOT_GPIO_ALT1, BIT(offset), 0);
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return 0;
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}
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static const struct pinmux_ops ocelot_pmx_ops = {
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.get_functions_count = ocelot_get_functions_count,
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.get_function_name = ocelot_get_function_name,
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.get_function_groups = ocelot_get_function_groups,
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.set_mux = ocelot_pinmux_set_mux,
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.gpio_set_direction = ocelot_gpio_set_direction,
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.gpio_request_enable = ocelot_gpio_request_enable,
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};
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static int ocelot_pctl_get_groups_count(struct pinctrl_dev *pctldev)
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{
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return ARRAY_SIZE(ocelot_pins);
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}
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static const char *ocelot_pctl_get_group_name(struct pinctrl_dev *pctldev,
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unsigned int group)
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{
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return ocelot_pins[group].name;
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}
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static int ocelot_pctl_get_group_pins(struct pinctrl_dev *pctldev,
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unsigned int group,
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const unsigned int **pins,
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unsigned int *num_pins)
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{
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*pins = &ocelot_pins[group].number;
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*num_pins = 1;
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return 0;
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}
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static const struct pinctrl_ops ocelot_pctl_ops = {
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.get_groups_count = ocelot_pctl_get_groups_count,
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.get_group_name = ocelot_pctl_get_group_name,
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.get_group_pins = ocelot_pctl_get_group_pins,
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.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
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.dt_free_map = pinconf_generic_dt_free_map,
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};
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static struct pinctrl_desc ocelot_desc = {
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.name = "ocelot-pinctrl",
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.pins = ocelot_pins,
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.npins = ARRAY_SIZE(ocelot_pins),
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.pctlops = &ocelot_pctl_ops,
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.pmxops = &ocelot_pmx_ops,
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.owner = THIS_MODULE,
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};
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static int ocelot_create_group_func_map(struct device *dev,
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struct ocelot_pinctrl *info)
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{
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u16 pins[ARRAY_SIZE(ocelot_pins)];
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int f, npins, i;
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for (f = 0; f < FUNC_MAX; f++) {
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for (npins = 0, i = 0; i < ARRAY_SIZE(ocelot_pins); i++) {
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if (ocelot_pin_function_idx(i, f) >= 0)
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pins[npins++] = i;
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}
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info->func[f].ngroups = npins;
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treewide: devm_kzalloc() -> devm_kcalloc()
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:
devm_kzalloc(handle, a * b, gfp)
with:
devm_kcalloc(handle, a * b, gfp)
as well as handling cases of:
devm_kzalloc(handle, a * b * c, gfp)
with:
devm_kzalloc(handle, array3_size(a, b, c), gfp)
as it's slightly less ugly than:
devm_kcalloc(handle, array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
devm_kzalloc(handle, 4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@
(
devm_kzalloc(HANDLE,
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
devm_kzalloc(HANDLE,
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@
(
devm_kzalloc(HANDLE,
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(char) * COUNT
+ COUNT
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
devm_kzalloc(HANDLE,
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
devm_kzalloc(HANDLE,
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@
(
devm_kzalloc(HANDLE,
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
devm_kzalloc(HANDLE,
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
devm_kzalloc(HANDLE,
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
devm_kzalloc(HANDLE,
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- (E1) * E2
+ E1, E2
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- (E1) * (E2)
+ E1, E2
, ...)
|
- devm_kzalloc
+ devm_kcalloc
(HANDLE,
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 05:07:58 +08:00
|
|
|
info->func[f].groups = devm_kcalloc(dev,
|
|
|
|
npins,
|
2018-01-06 08:09:26 +08:00
|
|
|
sizeof(char *),
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!info->func[f].groups)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
for (i = 0; i < npins; i++)
|
|
|
|
info->func[f].groups[i] = ocelot_pins[pins[i]].name;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ocelot_pinctrl_register(struct platform_device *pdev,
|
|
|
|
struct ocelot_pinctrl *info)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = ocelot_create_group_func_map(&pdev->dev, info);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&pdev->dev, "Unable to create group func map.\n");
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
info->pctl = devm_pinctrl_register(&pdev->dev, &ocelot_desc, info);
|
|
|
|
if (IS_ERR(info->pctl)) {
|
|
|
|
dev_err(&pdev->dev, "Failed to register pinctrl\n");
|
|
|
|
return PTR_ERR(info->pctl);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ocelot_gpio_get(struct gpio_chip *chip, unsigned int offset)
|
|
|
|
{
|
|
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
unsigned int val;
|
|
|
|
|
|
|
|
regmap_read(info->map, OCELOT_GPIO_IN, &val);
|
|
|
|
|
|
|
|
return !!(val & BIT(offset));
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ocelot_gpio_set(struct gpio_chip *chip, unsigned int offset,
|
|
|
|
int value)
|
|
|
|
{
|
|
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
|
|
|
|
if (value)
|
|
|
|
regmap_write(info->map, OCELOT_GPIO_OUT_SET, BIT(offset));
|
|
|
|
else
|
|
|
|
regmap_write(info->map, OCELOT_GPIO_OUT_CLR, BIT(offset));
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ocelot_gpio_get_direction(struct gpio_chip *chip,
|
|
|
|
unsigned int offset)
|
|
|
|
{
|
|
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
unsigned int val;
|
|
|
|
|
|
|
|
regmap_read(info->map, OCELOT_GPIO_OE, &val);
|
|
|
|
|
|
|
|
return !(val & BIT(offset));
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ocelot_gpio_direction_input(struct gpio_chip *chip,
|
|
|
|
unsigned int offset)
|
|
|
|
{
|
|
|
|
return pinctrl_gpio_direction_input(chip->base + offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ocelot_gpio_direction_output(struct gpio_chip *chip,
|
|
|
|
unsigned int offset, int value)
|
|
|
|
{
|
|
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
unsigned int pin = BIT(offset);
|
|
|
|
|
|
|
|
if (value)
|
|
|
|
regmap_write(info->map, OCELOT_GPIO_OUT_SET, pin);
|
|
|
|
else
|
|
|
|
regmap_write(info->map, OCELOT_GPIO_OUT_CLR, pin);
|
|
|
|
|
|
|
|
return pinctrl_gpio_direction_output(chip->base + offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct gpio_chip ocelot_gpiolib_chip = {
|
|
|
|
.request = gpiochip_generic_request,
|
|
|
|
.free = gpiochip_generic_free,
|
|
|
|
.set = ocelot_gpio_set,
|
|
|
|
.get = ocelot_gpio_get,
|
|
|
|
.get_direction = ocelot_gpio_get_direction,
|
|
|
|
.direction_input = ocelot_gpio_direction_input,
|
|
|
|
.direction_output = ocelot_gpio_direction_output,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
2018-07-25 20:26:21 +08:00
|
|
|
static void ocelot_irq_mask(struct irq_data *data)
|
|
|
|
{
|
|
|
|
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
|
|
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
unsigned int gpio = irqd_to_hwirq(data);
|
|
|
|
|
|
|
|
regmap_update_bits(info->map, OCELOT_GPIO_INTR_ENA, BIT(gpio), 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ocelot_irq_unmask(struct irq_data *data)
|
|
|
|
{
|
|
|
|
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
|
|
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
unsigned int gpio = irqd_to_hwirq(data);
|
|
|
|
|
|
|
|
regmap_update_bits(info->map, OCELOT_GPIO_INTR_ENA, BIT(gpio),
|
|
|
|
BIT(gpio));
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ocelot_irq_ack(struct irq_data *data)
|
|
|
|
{
|
|
|
|
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
|
|
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
unsigned int gpio = irqd_to_hwirq(data);
|
|
|
|
|
|
|
|
regmap_write_bits(info->map, OCELOT_GPIO_INTR, BIT(gpio), BIT(gpio));
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ocelot_irq_set_type(struct irq_data *data, unsigned int type);
|
|
|
|
|
|
|
|
static struct irq_chip ocelot_eoi_irqchip = {
|
|
|
|
.name = "gpio",
|
|
|
|
.irq_mask = ocelot_irq_mask,
|
|
|
|
.irq_eoi = ocelot_irq_ack,
|
|
|
|
.irq_unmask = ocelot_irq_unmask,
|
|
|
|
.flags = IRQCHIP_EOI_THREADED | IRQCHIP_EOI_IF_HANDLED,
|
|
|
|
.irq_set_type = ocelot_irq_set_type,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct irq_chip ocelot_irqchip = {
|
|
|
|
.name = "gpio",
|
|
|
|
.irq_mask = ocelot_irq_mask,
|
|
|
|
.irq_ack = ocelot_irq_ack,
|
|
|
|
.irq_unmask = ocelot_irq_unmask,
|
|
|
|
.irq_set_type = ocelot_irq_set_type,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int ocelot_irq_set_type(struct irq_data *data, unsigned int type)
|
|
|
|
{
|
|
|
|
type &= IRQ_TYPE_SENSE_MASK;
|
|
|
|
|
|
|
|
if (!(type & (IRQ_TYPE_EDGE_BOTH | IRQ_TYPE_LEVEL_HIGH)))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (type & IRQ_TYPE_LEVEL_HIGH)
|
|
|
|
irq_set_chip_handler_name_locked(data, &ocelot_eoi_irqchip,
|
|
|
|
handle_fasteoi_irq, NULL);
|
|
|
|
if (type & IRQ_TYPE_EDGE_BOTH)
|
|
|
|
irq_set_chip_handler_name_locked(data, &ocelot_irqchip,
|
|
|
|
handle_edge_irq, NULL);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ocelot_irq_handler(struct irq_desc *desc)
|
|
|
|
{
|
|
|
|
struct irq_chip *parent_chip = irq_desc_get_chip(desc);
|
|
|
|
struct gpio_chip *chip = irq_desc_get_handler_data(desc);
|
|
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
unsigned int reg = 0, irq;
|
|
|
|
unsigned long irqs;
|
|
|
|
|
|
|
|
regmap_read(info->map, OCELOT_GPIO_INTR_IDENT, ®);
|
|
|
|
if (!reg)
|
|
|
|
return;
|
|
|
|
|
|
|
|
chained_irq_enter(parent_chip, desc);
|
|
|
|
|
|
|
|
irqs = reg;
|
|
|
|
|
|
|
|
for_each_set_bit(irq, &irqs, OCELOT_PINS) {
|
|
|
|
generic_handle_irq(irq_linear_revmap(chip->irq.domain, irq));
|
|
|
|
}
|
|
|
|
|
|
|
|
chained_irq_exit(parent_chip, desc);
|
|
|
|
}
|
|
|
|
|
2018-01-06 08:09:26 +08:00
|
|
|
static int ocelot_gpiochip_register(struct platform_device *pdev,
|
|
|
|
struct ocelot_pinctrl *info)
|
|
|
|
{
|
|
|
|
struct gpio_chip *gc;
|
2018-07-25 20:26:21 +08:00
|
|
|
int ret, irq;
|
2018-01-06 08:09:26 +08:00
|
|
|
|
|
|
|
info->gpio_chip = ocelot_gpiolib_chip;
|
|
|
|
|
|
|
|
gc = &info->gpio_chip;
|
|
|
|
gc->ngpio = OCELOT_PINS;
|
|
|
|
gc->parent = &pdev->dev;
|
|
|
|
gc->base = 0;
|
|
|
|
gc->of_node = info->dev->of_node;
|
|
|
|
gc->label = "ocelot-gpio";
|
|
|
|
|
|
|
|
ret = devm_gpiochip_add_data(&pdev->dev, gc, info);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
2018-07-25 20:26:21 +08:00
|
|
|
irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
|
|
|
|
if (irq <= 0)
|
|
|
|
return irq;
|
|
|
|
|
|
|
|
ret = gpiochip_irqchip_add(gc, &ocelot_irqchip, 0, handle_edge_irq,
|
|
|
|
IRQ_TYPE_NONE);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
gpiochip_set_chained_irqchip(gc, &ocelot_irqchip, irq,
|
|
|
|
ocelot_irq_handler);
|
2018-01-06 08:09:26 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct regmap_config ocelot_pinctrl_regmap_config = {
|
|
|
|
.reg_bits = 32,
|
|
|
|
.val_bits = 32,
|
|
|
|
.reg_stride = 4,
|
|
|
|
.max_register = 0x64,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct of_device_id ocelot_pinctrl_of_match[] = {
|
|
|
|
{ .compatible = "mscc,ocelot-pinctrl" },
|
|
|
|
{},
|
|
|
|
};
|
|
|
|
|
2018-02-08 22:24:37 +08:00
|
|
|
static int ocelot_pinctrl_probe(struct platform_device *pdev)
|
2018-01-06 08:09:26 +08:00
|
|
|
{
|
|
|
|
struct device *dev = &pdev->dev;
|
|
|
|
struct ocelot_pinctrl *info;
|
|
|
|
void __iomem *base;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
|
|
|
|
if (!info)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
base = devm_ioremap_resource(dev,
|
|
|
|
platform_get_resource(pdev, IORESOURCE_MEM, 0));
|
|
|
|
if (IS_ERR(base)) {
|
|
|
|
dev_err(dev, "Failed to ioremap registers\n");
|
|
|
|
return PTR_ERR(base);
|
|
|
|
}
|
|
|
|
|
|
|
|
info->map = devm_regmap_init_mmio(dev, base,
|
|
|
|
&ocelot_pinctrl_regmap_config);
|
|
|
|
if (IS_ERR(info->map)) {
|
|
|
|
dev_err(dev, "Failed to create regmap\n");
|
|
|
|
return PTR_ERR(info->map);
|
|
|
|
}
|
|
|
|
dev_set_drvdata(dev, info->map);
|
|
|
|
info->dev = dev;
|
|
|
|
|
|
|
|
ret = ocelot_pinctrl_register(pdev, info);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = ocelot_gpiochip_register(pdev, info);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct platform_driver ocelot_pinctrl_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "pinctrl-ocelot",
|
|
|
|
.of_match_table = of_match_ptr(ocelot_pinctrl_of_match),
|
|
|
|
.suppress_bind_attrs = true,
|
|
|
|
},
|
|
|
|
.probe = ocelot_pinctrl_probe,
|
|
|
|
};
|
|
|
|
builtin_platform_driver(ocelot_pinctrl_driver);
|