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linux/drivers/clk/renesas/r9a06g032-clocks.c

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// SPDX-License-Identifier: GPL-2.0
/*
* R9A09G032 clock driver
*
* Copyright (C) 2018 Renesas Electronics Europe Limited
*
* Michel Pollet <michel.pollet@bp.renesas.com>, <buserror@gmail.com>
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/math64.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <dt-bindings/clock/r9a06g032-sysctrl.h>
struct r9a06g032_gate {
u16 gate, reset, ready, midle,
scon, mirack, mistat;
};
/* This is used to describe a clock for instantiation */
struct r9a06g032_clkdesc {
const char *name;
uint32_t type: 3;
uint32_t index: 8;
uint32_t source : 8; /* source index + 1 (0 == none) */
/* these are used to populate the bitsel struct */
union {
struct r9a06g032_gate gate;
/* for dividers */
struct {
unsigned int div_min : 10, div_max : 10, reg: 10;
u16 div_table[4];
};
/* For fixed-factor ones */
struct {
u16 div, mul;
};
unsigned int factor;
unsigned int frequency;
/* for dual gate */
struct {
uint16_t group : 1, index: 3;
u16 sel, g1, r1, g2, r2;
} dual;
};
} __packed;
#define I_GATE(_clk, _rst, _rdy, _midle, _scon, _mirack, _mistat) \
{ .gate = _clk, .reset = _rst, \
.ready = _rdy, .midle = _midle, \
.scon = _scon, .mirack = _mirack, .mistat = _mistat }
#define D_GATE(_idx, _n, _src, ...) \
{ .type = K_GATE, .index = R9A06G032_##_idx, \
.source = 1 + R9A06G032_##_src, .name = _n, \
.gate = I_GATE(__VA_ARGS__), }
#define D_ROOT(_idx, _n, _mul, _div) \
{ .type = K_FFC, .index = R9A06G032_##_idx, .name = _n, \
.div = _div, .mul = _mul }
#define D_FFC(_idx, _n, _src, _div) \
{ .type = K_FFC, .index = R9A06G032_##_idx, \
.source = 1 + R9A06G032_##_src, .name = _n, \
.div = _div, .mul = 1}
#define D_DIV(_idx, _n, _src, _reg, _min, _max, ...) \
{ .type = K_DIV, .index = R9A06G032_##_idx, \
.source = 1 + R9A06G032_##_src, .name = _n, \
.reg = _reg, .div_min = _min, .div_max = _max, \
.div_table = { __VA_ARGS__ } }
#define D_UGATE(_idx, _n, _src, _g, _gi, _g1, _r1, _g2, _r2) \
{ .type = K_DUALGATE, .index = R9A06G032_##_idx, \
.source = 1 + R9A06G032_##_src, .name = _n, \
.dual = { .group = _g, .index = _gi, \
.g1 = _g1, .r1 = _r1, .g2 = _g2, .r2 = _r2 }, }
enum { K_GATE = 0, K_FFC, K_DIV, K_BITSEL, K_DUALGATE };
/* Internal clock IDs */
#define R9A06G032_CLKOUT 0
#define R9A06G032_CLKOUT_D10 2
#define R9A06G032_CLKOUT_D16 3
#define R9A06G032_CLKOUT_D160 4
#define R9A06G032_CLKOUT_D1OR2 5
#define R9A06G032_CLKOUT_D20 6
#define R9A06G032_CLKOUT_D40 7
#define R9A06G032_CLKOUT_D5 8
#define R9A06G032_CLKOUT_D8 9
#define R9A06G032_DIV_ADC 10
#define R9A06G032_DIV_I2C 11
#define R9A06G032_DIV_NAND 12
#define R9A06G032_DIV_P1_PG 13
#define R9A06G032_DIV_P2_PG 14
#define R9A06G032_DIV_P3_PG 15
#define R9A06G032_DIV_P4_PG 16
#define R9A06G032_DIV_P5_PG 17
#define R9A06G032_DIV_P6_PG 18
#define R9A06G032_DIV_QSPI0 19
#define R9A06G032_DIV_QSPI1 20
#define R9A06G032_DIV_REF_SYNC 21
#define R9A06G032_DIV_SDIO0 22
#define R9A06G032_DIV_SDIO1 23
#define R9A06G032_DIV_SWITCH 24
#define R9A06G032_DIV_UART 25
#define R9A06G032_DIV_MOTOR 64
#define R9A06G032_CLK_DDRPHY_PLLCLK_D4 78
#define R9A06G032_CLK_ECAT100_D4 79
#define R9A06G032_CLK_HSR100_D2 80
#define R9A06G032_CLK_REF_SYNC_D4 81
#define R9A06G032_CLK_REF_SYNC_D8 82
#define R9A06G032_CLK_SERCOS100_D2 83
#define R9A06G032_DIV_CA7 84
#define R9A06G032_UART_GROUP_012 154
#define R9A06G032_UART_GROUP_34567 155
#define R9A06G032_CLOCK_COUNT (R9A06G032_UART_GROUP_34567 + 1)
static const struct r9a06g032_clkdesc r9a06g032_clocks[] __initconst = {
D_ROOT(CLKOUT, "clkout", 25, 1),
D_ROOT(CLK_PLL_USB, "clk_pll_usb", 12, 10),
D_FFC(CLKOUT_D10, "clkout_d10", CLKOUT, 10),
D_FFC(CLKOUT_D16, "clkout_d16", CLKOUT, 16),
D_FFC(CLKOUT_D160, "clkout_d160", CLKOUT, 160),
D_DIV(CLKOUT_D1OR2, "clkout_d1or2", CLKOUT, 0, 1, 2),
D_FFC(CLKOUT_D20, "clkout_d20", CLKOUT, 20),
D_FFC(CLKOUT_D40, "clkout_d40", CLKOUT, 40),
D_FFC(CLKOUT_D5, "clkout_d5", CLKOUT, 5),
D_FFC(CLKOUT_D8, "clkout_d8", CLKOUT, 8),
D_DIV(DIV_ADC, "div_adc", CLKOUT, 77, 50, 250),
D_DIV(DIV_I2C, "div_i2c", CLKOUT, 78, 12, 16),
D_DIV(DIV_NAND, "div_nand", CLKOUT, 82, 12, 32),
D_DIV(DIV_P1_PG, "div_p1_pg", CLKOUT, 68, 12, 200),
D_DIV(DIV_P2_PG, "div_p2_pg", CLKOUT, 62, 12, 128),
D_DIV(DIV_P3_PG, "div_p3_pg", CLKOUT, 64, 8, 128),
D_DIV(DIV_P4_PG, "div_p4_pg", CLKOUT, 66, 8, 128),
D_DIV(DIV_P5_PG, "div_p5_pg", CLKOUT, 71, 10, 40),
D_DIV(DIV_P6_PG, "div_p6_pg", CLKOUT, 18, 12, 64),
D_DIV(DIV_QSPI0, "div_qspi0", CLKOUT, 73, 3, 7),
D_DIV(DIV_QSPI1, "div_qspi1", CLKOUT, 25, 3, 7),
D_DIV(DIV_REF_SYNC, "div_ref_sync", CLKOUT, 56, 2, 16, 2, 4, 8, 16),
D_DIV(DIV_SDIO0, "div_sdio0", CLKOUT, 74, 20, 128),
D_DIV(DIV_SDIO1, "div_sdio1", CLKOUT, 75, 20, 128),
D_DIV(DIV_SWITCH, "div_switch", CLKOUT, 37, 5, 40),
D_DIV(DIV_UART, "div_uart", CLKOUT, 79, 12, 128),
D_GATE(CLK_25_PG4, "clk_25_pg4", CLKOUT_D40, 0x749, 0x74a, 0x74b, 0, 0xae3, 0, 0),
D_GATE(CLK_25_PG5, "clk_25_pg5", CLKOUT_D40, 0x74c, 0x74d, 0x74e, 0, 0xae4, 0, 0),
D_GATE(CLK_25_PG6, "clk_25_pg6", CLKOUT_D40, 0x74f, 0x750, 0x751, 0, 0xae5, 0, 0),
D_GATE(CLK_25_PG7, "clk_25_pg7", CLKOUT_D40, 0x752, 0x753, 0x754, 0, 0xae6, 0, 0),
D_GATE(CLK_25_PG8, "clk_25_pg8", CLKOUT_D40, 0x755, 0x756, 0x757, 0, 0xae7, 0, 0),
D_GATE(CLK_ADC, "clk_adc", DIV_ADC, 0x1ea, 0x1eb, 0, 0, 0, 0, 0),
D_GATE(CLK_ECAT100, "clk_ecat100", CLKOUT_D10, 0x405, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_HSR100, "clk_hsr100", CLKOUT_D10, 0x483, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_I2C0, "clk_i2c0", DIV_I2C, 0x1e6, 0x1e7, 0, 0, 0, 0, 0),
D_GATE(CLK_I2C1, "clk_i2c1", DIV_I2C, 0x1e8, 0x1e9, 0, 0, 0, 0, 0),
D_GATE(CLK_MII_REF, "clk_mii_ref", CLKOUT_D40, 0x342, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_NAND, "clk_nand", DIV_NAND, 0x284, 0x285, 0, 0, 0, 0, 0),
D_GATE(CLK_NOUSBP2_PG6, "clk_nousbp2_pg6", DIV_P2_PG, 0x774, 0x775, 0, 0, 0, 0, 0),
D_GATE(CLK_P1_PG2, "clk_p1_pg2", DIV_P1_PG, 0x862, 0x863, 0, 0, 0, 0, 0),
D_GATE(CLK_P1_PG3, "clk_p1_pg3", DIV_P1_PG, 0x864, 0x865, 0, 0, 0, 0, 0),
D_GATE(CLK_P1_PG4, "clk_p1_pg4", DIV_P1_PG, 0x866, 0x867, 0, 0, 0, 0, 0),
D_GATE(CLK_P4_PG3, "clk_p4_pg3", DIV_P4_PG, 0x824, 0x825, 0, 0, 0, 0, 0),
D_GATE(CLK_P4_PG4, "clk_p4_pg4", DIV_P4_PG, 0x826, 0x827, 0, 0, 0, 0, 0),
D_GATE(CLK_P6_PG1, "clk_p6_pg1", DIV_P6_PG, 0x8a0, 0x8a1, 0x8a2, 0, 0xb60, 0, 0),
D_GATE(CLK_P6_PG2, "clk_p6_pg2", DIV_P6_PG, 0x8a3, 0x8a4, 0x8a5, 0, 0xb61, 0, 0),
D_GATE(CLK_P6_PG3, "clk_p6_pg3", DIV_P6_PG, 0x8a6, 0x8a7, 0x8a8, 0, 0xb62, 0, 0),
D_GATE(CLK_P6_PG4, "clk_p6_pg4", DIV_P6_PG, 0x8a9, 0x8aa, 0x8ab, 0, 0xb63, 0, 0),
D_GATE(CLK_QSPI0, "clk_qspi0", DIV_QSPI0, 0x2a4, 0x2a5, 0, 0, 0, 0, 0),
D_GATE(CLK_QSPI1, "clk_qspi1", DIV_QSPI1, 0x484, 0x485, 0, 0, 0, 0, 0),
D_GATE(CLK_RGMII_REF, "clk_rgmii_ref", CLKOUT_D8, 0x340, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_RMII_REF, "clk_rmii_ref", CLKOUT_D20, 0x341, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_SDIO0, "clk_sdio0", DIV_SDIO0, 0x64, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_SDIO1, "clk_sdio1", DIV_SDIO1, 0x644, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_SERCOS100, "clk_sercos100", CLKOUT_D10, 0x425, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_SLCD, "clk_slcd", DIV_P1_PG, 0x860, 0x861, 0, 0, 0, 0, 0),
D_GATE(CLK_SPI0, "clk_spi0", DIV_P3_PG, 0x7e0, 0x7e1, 0, 0, 0, 0, 0),
D_GATE(CLK_SPI1, "clk_spi1", DIV_P3_PG, 0x7e2, 0x7e3, 0, 0, 0, 0, 0),
D_GATE(CLK_SPI2, "clk_spi2", DIV_P3_PG, 0x7e4, 0x7e5, 0, 0, 0, 0, 0),
D_GATE(CLK_SPI3, "clk_spi3", DIV_P3_PG, 0x7e6, 0x7e7, 0, 0, 0, 0, 0),
D_GATE(CLK_SPI4, "clk_spi4", DIV_P4_PG, 0x820, 0x821, 0, 0, 0, 0, 0),
D_GATE(CLK_SPI5, "clk_spi5", DIV_P4_PG, 0x822, 0x823, 0, 0, 0, 0, 0),
D_GATE(CLK_SWITCH, "clk_switch", DIV_SWITCH, 0x982, 0x983, 0, 0, 0, 0, 0),
D_DIV(DIV_MOTOR, "div_motor", CLKOUT_D5, 84, 2, 8),
D_GATE(HCLK_ECAT125, "hclk_ecat125", CLKOUT_D8, 0x400, 0x401, 0, 0x402, 0, 0x440, 0x441),
D_GATE(HCLK_PINCONFIG, "hclk_pinconfig", CLKOUT_D40, 0x740, 0x741, 0x742, 0, 0xae0, 0, 0),
D_GATE(HCLK_SERCOS, "hclk_sercos", CLKOUT_D10, 0x420, 0x422, 0, 0x421, 0, 0x460, 0x461),
D_GATE(HCLK_SGPIO2, "hclk_sgpio2", DIV_P5_PG, 0x8c3, 0x8c4, 0x8c5, 0, 0xb41, 0, 0),
D_GATE(HCLK_SGPIO3, "hclk_sgpio3", DIV_P5_PG, 0x8c6, 0x8c7, 0x8c8, 0, 0xb42, 0, 0),
D_GATE(HCLK_SGPIO4, "hclk_sgpio4", DIV_P5_PG, 0x8c9, 0x8ca, 0x8cb, 0, 0xb43, 0, 0),
D_GATE(HCLK_TIMER0, "hclk_timer0", CLKOUT_D40, 0x743, 0x744, 0x745, 0, 0xae1, 0, 0),
D_GATE(HCLK_TIMER1, "hclk_timer1", CLKOUT_D40, 0x746, 0x747, 0x748, 0, 0xae2, 0, 0),
D_GATE(HCLK_USBF, "hclk_usbf", CLKOUT_D8, 0xe3, 0, 0, 0xe4, 0, 0x102, 0x103),
D_GATE(HCLK_USBH, "hclk_usbh", CLKOUT_D8, 0xe0, 0xe1, 0, 0xe2, 0, 0x100, 0x101),
D_GATE(HCLK_USBPM, "hclk_usbpm", CLKOUT_D8, 0xe5, 0, 0, 0, 0, 0, 0),
D_GATE(CLK_48_PG_F, "clk_48_pg_f", CLK_48, 0x78c, 0x78d, 0, 0x78e, 0, 0xb04, 0xb05),
D_GATE(CLK_48_PG4, "clk_48_pg4", CLK_48, 0x789, 0x78a, 0x78b, 0, 0xb03, 0, 0),
D_FFC(CLK_DDRPHY_PLLCLK_D4, "clk_ddrphy_pllclk_d4", CLK_DDRPHY_PLLCLK, 4),
D_FFC(CLK_ECAT100_D4, "clk_ecat100_d4", CLK_ECAT100, 4),
D_FFC(CLK_HSR100_D2, "clk_hsr100_d2", CLK_HSR100, 2),
D_FFC(CLK_REF_SYNC_D4, "clk_ref_sync_d4", CLK_REF_SYNC, 4),
D_FFC(CLK_REF_SYNC_D8, "clk_ref_sync_d8", CLK_REF_SYNC, 8),
D_FFC(CLK_SERCOS100_D2, "clk_sercos100_d2", CLK_SERCOS100, 2),
D_DIV(DIV_CA7, "div_ca7", CLK_REF_SYNC, 57, 1, 4, 1, 2, 4),
D_GATE(HCLK_CAN0, "hclk_can0", CLK_48, 0x783, 0x784, 0x785, 0, 0xb01, 0, 0),
D_GATE(HCLK_CAN1, "hclk_can1", CLK_48, 0x786, 0x787, 0x788, 0, 0xb02, 0, 0),
D_GATE(HCLK_DELTASIGMA, "hclk_deltasigma", DIV_MOTOR, 0x1ef, 0x1f0, 0x1f1, 0, 0, 0, 0),
D_GATE(HCLK_PWMPTO, "hclk_pwmpto", DIV_MOTOR, 0x1ec, 0x1ed, 0x1ee, 0, 0, 0, 0),
D_GATE(HCLK_RSV, "hclk_rsv", CLK_48, 0x780, 0x781, 0x782, 0, 0xb00, 0, 0),
D_GATE(HCLK_SGPIO0, "hclk_sgpio0", DIV_MOTOR, 0x1e0, 0x1e1, 0x1e2, 0, 0, 0, 0),
D_GATE(HCLK_SGPIO1, "hclk_sgpio1", DIV_MOTOR, 0x1e3, 0x1e4, 0x1e5, 0, 0, 0, 0),
D_DIV(RTOS_MDC, "rtos_mdc", CLK_REF_SYNC, 100, 80, 640, 80, 160, 320, 640),
D_GATE(CLK_CM3, "clk_cm3", CLK_REF_SYNC_D4, 0xba0, 0xba1, 0, 0xba2, 0, 0xbc0, 0xbc1),
D_GATE(CLK_DDRC, "clk_ddrc", CLK_DDRPHY_PLLCLK_D4, 0x323, 0x324, 0, 0, 0, 0, 0),
D_GATE(CLK_ECAT25, "clk_ecat25", CLK_ECAT100_D4, 0x403, 0x404, 0, 0, 0, 0, 0),
D_GATE(CLK_HSR50, "clk_hsr50", CLK_HSR100_D2, 0x484, 0x485, 0, 0, 0, 0, 0),
D_GATE(CLK_HW_RTOS, "clk_hw_rtos", CLK_REF_SYNC_D4, 0xc60, 0xc61, 0, 0, 0, 0, 0),
D_GATE(CLK_SERCOS50, "clk_sercos50", CLK_SERCOS100_D2, 0x424, 0x423, 0, 0, 0, 0, 0),
D_GATE(HCLK_ADC, "hclk_adc", CLK_REF_SYNC_D8, 0x1af, 0x1b0, 0x1b1, 0, 0, 0, 0),
D_GATE(HCLK_CM3, "hclk_cm3", CLK_REF_SYNC_D4, 0xc20, 0xc21, 0xc22, 0, 0, 0, 0),
D_GATE(HCLK_CRYPTO_EIP150, "hclk_crypto_eip150", CLK_REF_SYNC_D4, 0x123, 0x124, 0x125, 0, 0x142, 0, 0),
D_GATE(HCLK_CRYPTO_EIP93, "hclk_crypto_eip93", CLK_REF_SYNC_D4, 0x120, 0x121, 0, 0x122, 0, 0x140, 0x141),
D_GATE(HCLK_DDRC, "hclk_ddrc", CLK_REF_SYNC_D4, 0x320, 0x322, 0, 0x321, 0, 0x3a0, 0x3a1),
D_GATE(HCLK_DMA0, "hclk_dma0", CLK_REF_SYNC_D4, 0x260, 0x261, 0x262, 0x263, 0x2c0, 0x2c1, 0x2c2),
D_GATE(HCLK_DMA1, "hclk_dma1", CLK_REF_SYNC_D4, 0x264, 0x265, 0x266, 0x267, 0x2c3, 0x2c4, 0x2c5),
D_GATE(HCLK_GMAC0, "hclk_gmac0", CLK_REF_SYNC_D4, 0x360, 0x361, 0x362, 0x363, 0x3c0, 0x3c1, 0x3c2),
D_GATE(HCLK_GMAC1, "hclk_gmac1", CLK_REF_SYNC_D4, 0x380, 0x381, 0x382, 0x383, 0x3e0, 0x3e1, 0x3e2),
D_GATE(HCLK_GPIO0, "hclk_gpio0", CLK_REF_SYNC_D4, 0x212, 0x213, 0x214, 0, 0, 0, 0),
D_GATE(HCLK_GPIO1, "hclk_gpio1", CLK_REF_SYNC_D4, 0x215, 0x216, 0x217, 0, 0, 0, 0),
D_GATE(HCLK_GPIO2, "hclk_gpio2", CLK_REF_SYNC_D4, 0x229, 0x22a, 0x22b, 0, 0, 0, 0),
D_GATE(HCLK_HSR, "hclk_hsr", CLK_HSR100_D2, 0x480, 0x482, 0, 0x481, 0, 0x4c0, 0x4c1),
D_GATE(HCLK_I2C0, "hclk_i2c0", CLK_REF_SYNC_D8, 0x1a9, 0x1aa, 0x1ab, 0, 0, 0, 0),
D_GATE(HCLK_I2C1, "hclk_i2c1", CLK_REF_SYNC_D8, 0x1ac, 0x1ad, 0x1ae, 0, 0, 0, 0),
D_GATE(HCLK_LCD, "hclk_lcd", CLK_REF_SYNC_D4, 0x7a0, 0x7a1, 0x7a2, 0, 0xb20, 0, 0),
D_GATE(HCLK_MSEBI_M, "hclk_msebi_m", CLK_REF_SYNC_D4, 0x164, 0x165, 0x166, 0, 0x183, 0, 0),
D_GATE(HCLK_MSEBI_S, "hclk_msebi_s", CLK_REF_SYNC_D4, 0x160, 0x161, 0x162, 0x163, 0x180, 0x181, 0x182),
D_GATE(HCLK_NAND, "hclk_nand", CLK_REF_SYNC_D4, 0x280, 0x281, 0x282, 0x283, 0x2e0, 0x2e1, 0x2e2),
D_GATE(HCLK_PG_I, "hclk_pg_i", CLK_REF_SYNC_D4, 0x7ac, 0x7ad, 0, 0x7ae, 0, 0xb24, 0xb25),
D_GATE(HCLK_PG19, "hclk_pg19", CLK_REF_SYNC_D4, 0x22c, 0x22d, 0x22e, 0, 0, 0, 0),
D_GATE(HCLK_PG20, "hclk_pg20", CLK_REF_SYNC_D4, 0x22f, 0x230, 0x231, 0, 0, 0, 0),
D_GATE(HCLK_PG3, "hclk_pg3", CLK_REF_SYNC_D4, 0x7a6, 0x7a7, 0x7a8, 0, 0xb22, 0, 0),
D_GATE(HCLK_PG4, "hclk_pg4", CLK_REF_SYNC_D4, 0x7a9, 0x7aa, 0x7ab, 0, 0xb23, 0, 0),
D_GATE(HCLK_QSPI0, "hclk_qspi0", CLK_REF_SYNC_D4, 0x2a0, 0x2a1, 0x2a2, 0x2a3, 0x300, 0x301, 0x302),
D_GATE(HCLK_QSPI1, "hclk_qspi1", CLK_REF_SYNC_D4, 0x480, 0x481, 0x482, 0x483, 0x4c0, 0x4c1, 0x4c2),
D_GATE(HCLK_ROM, "hclk_rom", CLK_REF_SYNC_D4, 0xaa0, 0xaa1, 0xaa2, 0, 0xb80, 0, 0),
D_GATE(HCLK_RTC, "hclk_rtc", CLK_REF_SYNC_D8, 0xa00, 0, 0, 0, 0, 0, 0),
D_GATE(HCLK_SDIO0, "hclk_sdio0", CLK_REF_SYNC_D4, 0x60, 0x61, 0x62, 0x63, 0x80, 0x81, 0x82),
D_GATE(HCLK_SDIO1, "hclk_sdio1", CLK_REF_SYNC_D4, 0x640, 0x641, 0x642, 0x643, 0x660, 0x661, 0x662),
D_GATE(HCLK_SEMAP, "hclk_semap", CLK_REF_SYNC_D4, 0x7a3, 0x7a4, 0x7a5, 0, 0xb21, 0, 0),
D_GATE(HCLK_SPI0, "hclk_spi0", CLK_REF_SYNC_D4, 0x200, 0x201, 0x202, 0, 0, 0, 0),
D_GATE(HCLK_SPI1, "hclk_spi1", CLK_REF_SYNC_D4, 0x203, 0x204, 0x205, 0, 0, 0, 0),
D_GATE(HCLK_SPI2, "hclk_spi2", CLK_REF_SYNC_D4, 0x206, 0x207, 0x208, 0, 0, 0, 0),
D_GATE(HCLK_SPI3, "hclk_spi3", CLK_REF_SYNC_D4, 0x209, 0x20a, 0x20b, 0, 0, 0, 0),
D_GATE(HCLK_SPI4, "hclk_spi4", CLK_REF_SYNC_D4, 0x20c, 0x20d, 0x20e, 0, 0, 0, 0),
D_GATE(HCLK_SPI5, "hclk_spi5", CLK_REF_SYNC_D4, 0x20f, 0x210, 0x211, 0, 0, 0, 0),
D_GATE(HCLK_SWITCH, "hclk_switch", CLK_REF_SYNC_D4, 0x980, 0, 0x981, 0, 0, 0, 0),
D_GATE(HCLK_SWITCH_RG, "hclk_switch_rg", CLK_REF_SYNC_D4, 0xc40, 0xc41, 0xc42, 0, 0, 0, 0),
D_GATE(HCLK_UART0, "hclk_uart0", CLK_REF_SYNC_D8, 0x1a0, 0x1a1, 0x1a2, 0, 0, 0, 0),
D_GATE(HCLK_UART1, "hclk_uart1", CLK_REF_SYNC_D8, 0x1a3, 0x1a4, 0x1a5, 0, 0, 0, 0),
D_GATE(HCLK_UART2, "hclk_uart2", CLK_REF_SYNC_D8, 0x1a6, 0x1a7, 0x1a8, 0, 0, 0, 0),
D_GATE(HCLK_UART3, "hclk_uart3", CLK_REF_SYNC_D4, 0x218, 0x219, 0x21a, 0, 0, 0, 0),
D_GATE(HCLK_UART4, "hclk_uart4", CLK_REF_SYNC_D4, 0x21b, 0x21c, 0x21d, 0, 0, 0, 0),
D_GATE(HCLK_UART5, "hclk_uart5", CLK_REF_SYNC_D4, 0x220, 0x221, 0x222, 0, 0, 0, 0),
D_GATE(HCLK_UART6, "hclk_uart6", CLK_REF_SYNC_D4, 0x223, 0x224, 0x225, 0, 0, 0, 0),
D_GATE(HCLK_UART7, "hclk_uart7", CLK_REF_SYNC_D4, 0x226, 0x227, 0x228, 0, 0, 0, 0),
/*
* These are not hardware clocks, but are needed to handle the special
* case where we have a 'selector bit' that doesn't just change the
* parent for a clock, but also the gate it's suposed to use.
*/
{
.index = R9A06G032_UART_GROUP_012,
.name = "uart_group_012",
.type = K_BITSEL,
.source = 1 + R9A06G032_DIV_UART,
/* R9A06G032_SYSCTRL_REG_PWRCTRL_PG1_PR2 */
.dual.sel = ((0xec / 4) << 5) | 24,
.dual.group = 0,
},
{
.index = R9A06G032_UART_GROUP_34567,
.name = "uart_group_34567",
.type = K_BITSEL,
.source = 1 + R9A06G032_DIV_P2_PG,
/* R9A06G032_SYSCTRL_REG_PWRCTRL_PG0_0 */
.dual.sel = ((0x34 / 4) << 5) | 30,
.dual.group = 1,
},
D_UGATE(CLK_UART0, "clk_uart0", UART_GROUP_012, 0, 0, 0x1b2, 0x1b3, 0x1b4, 0x1b5),
D_UGATE(CLK_UART1, "clk_uart1", UART_GROUP_012, 0, 1, 0x1b6, 0x1b7, 0x1b8, 0x1b9),
D_UGATE(CLK_UART2, "clk_uart2", UART_GROUP_012, 0, 2, 0x1ba, 0x1bb, 0x1bc, 0x1bd),
D_UGATE(CLK_UART3, "clk_uart3", UART_GROUP_34567, 1, 0, 0x760, 0x761, 0x762, 0x763),
D_UGATE(CLK_UART4, "clk_uart4", UART_GROUP_34567, 1, 1, 0x764, 0x765, 0x766, 0x767),
D_UGATE(CLK_UART5, "clk_uart5", UART_GROUP_34567, 1, 2, 0x768, 0x769, 0x76a, 0x76b),
D_UGATE(CLK_UART6, "clk_uart6", UART_GROUP_34567, 1, 3, 0x76c, 0x76d, 0x76e, 0x76f),
D_UGATE(CLK_UART7, "clk_uart7", UART_GROUP_34567, 1, 4, 0x770, 0x771, 0x772, 0x773),
};
struct r9a06g032_priv {
struct clk_onecell_data data;
spinlock_t lock; /* protects concurent access to gates */
void __iomem *reg;
};
/* register/bit pairs are encoded as an uint16_t */
static void
clk_rdesc_set(struct r9a06g032_priv *clocks,
u16 one, unsigned int on)
{
u32 __iomem *reg = clocks->reg + (4 * (one >> 5));
u32 val = readl(reg);
val = (val & ~(1U << (one & 0x1f))) | ((!!on) << (one & 0x1f));
writel(val, reg);
}
static int
clk_rdesc_get(struct r9a06g032_priv *clocks,
uint16_t one)
{
u32 __iomem *reg = clocks->reg + (4 * (one >> 5));
u32 val = readl(reg);
return !!(val & (1U << (one & 0x1f)));
}
/*
* This implements the R9A09G032 clock gate 'driver'. We cannot use the system's
* clock gate framework as the gates on the R9A09G032 have a special enabling
* sequence, therefore we use this little proxy.
*/
struct r9a06g032_clk_gate {
struct clk_hw hw;
struct r9a06g032_priv *clocks;
u16 index;
struct r9a06g032_gate gate;
};
#define to_r9a06g032_gate(_hw) container_of(_hw, struct r9a06g032_clk_gate, hw)
static void
r9a06g032_clk_gate_set(struct r9a06g032_priv *clocks,
struct r9a06g032_gate *g, int on)
{
unsigned long flags;
WARN_ON(!g->gate);
spin_lock_irqsave(&clocks->lock, flags);
clk_rdesc_set(clocks, g->gate, on);
/* De-assert reset */
if (g->reset)
clk_rdesc_set(clocks, g->reset, 1);
spin_unlock_irqrestore(&clocks->lock, flags);
/* Hardware manual recommends 5us delay after enabling clock & reset */
udelay(5);
/* If the peripheral is memory mapped (i.e. an AXI slave), there is an
* associated SLVRDY bit in the System Controller that needs to be set
* so that the FlexWAY bus fabric passes on the read/write requests.
*/
if (g->ready || g->midle) {
spin_lock_irqsave(&clocks->lock, flags);
if (g->ready)
clk_rdesc_set(clocks, g->ready, on);
/* Clear 'Master Idle Request' bit */
if (g->midle)
clk_rdesc_set(clocks, g->midle, !on);
spin_unlock_irqrestore(&clocks->lock, flags);
}
/* Note: We don't wait for FlexWAY Socket Connection signal */
}
static int r9a06g032_clk_gate_enable(struct clk_hw *hw)
{
struct r9a06g032_clk_gate *g = to_r9a06g032_gate(hw);
r9a06g032_clk_gate_set(g->clocks, &g->gate, 1);
return 0;
}
static void r9a06g032_clk_gate_disable(struct clk_hw *hw)
{
struct r9a06g032_clk_gate *g = to_r9a06g032_gate(hw);
r9a06g032_clk_gate_set(g->clocks, &g->gate, 0);
}
static int r9a06g032_clk_gate_is_enabled(struct clk_hw *hw)
{
struct r9a06g032_clk_gate *g = to_r9a06g032_gate(hw);
/* if clock is in reset, the gate might be on, and still not 'be' on */
if (g->gate.reset && !clk_rdesc_get(g->clocks, g->gate.reset))
return 0;
return clk_rdesc_get(g->clocks, g->gate.gate);
}
static const struct clk_ops r9a06g032_clk_gate_ops = {
.enable = r9a06g032_clk_gate_enable,
.disable = r9a06g032_clk_gate_disable,
.is_enabled = r9a06g032_clk_gate_is_enabled,
};
static struct clk *
r9a06g032_register_gate(struct r9a06g032_priv *clocks,
const char *parent_name,
const struct r9a06g032_clkdesc *desc)
{
struct clk *clk;
struct r9a06g032_clk_gate *g;
struct clk_init_data init;
g = kzalloc(sizeof(*g), GFP_KERNEL);
if (!g)
return NULL;
init.name = desc->name;
init.ops = &r9a06g032_clk_gate_ops;
init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
init.parent_names = parent_name ? &parent_name : NULL;
init.num_parents = parent_name ? 1 : 0;
g->clocks = clocks;
g->index = desc->index;
g->gate = desc->gate;
g->hw.init = &init;
/*
* important here, some clocks are already in use by the CM3, we
* have to assume they are not Linux's to play with and try to disable
* at the end of the boot!
*/
if (r9a06g032_clk_gate_is_enabled(&g->hw)) {
init.flags |= CLK_IS_CRITICAL;
pr_debug("%s was enabled, making read-only\n", desc->name);
}
clk = clk_register(NULL, &g->hw);
if (IS_ERR(clk)) {
kfree(g);
return NULL;
}
return clk;
}
struct r9a06g032_clk_div {
struct clk_hw hw;
struct r9a06g032_priv *clocks;
u16 index;
u16 reg;
u16 min, max;
u8 table_size;
u16 table[8]; /* we know there are no more than 8 */
};
#define to_r9a06g032_div(_hw) \
container_of(_hw, struct r9a06g032_clk_div, hw)
static unsigned long
r9a06g032_div_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct r9a06g032_clk_div *clk = to_r9a06g032_div(hw);
u32 __iomem *reg = clk->clocks->reg + (4 * clk->reg);
u32 div = readl(reg);
if (div < clk->min)
div = clk->min;
else if (div > clk->max)
div = clk->max;
return DIV_ROUND_UP(parent_rate, div);
}
/*
* Attempts to find a value that is in range of min,max,
* and if a table of set dividers was specified for this
* register, try to find the fixed divider that is the closest
* to the target frequency
*/
static long
r9a06g032_div_clamp_div(struct r9a06g032_clk_div *clk,
unsigned long rate, unsigned long prate)
{
/* + 1 to cope with rates that have the remainder dropped */
u32 div = DIV_ROUND_UP(prate, rate + 1);
int i;
if (div <= clk->min)
return clk->min;
if (div >= clk->max)
return clk->max;
for (i = 0; clk->table_size && i < clk->table_size - 1; i++) {
if (div >= clk->table[i] && div <= clk->table[i + 1]) {
unsigned long m = rate -
DIV_ROUND_UP(prate, clk->table[i]);
unsigned long p =
DIV_ROUND_UP(prate, clk->table[i + 1]) -
rate;
/*
* select the divider that generates
* the value closest to the ideal frequency
*/
div = p >= m ? clk->table[i] : clk->table[i + 1];
return div;
}
}
return div;
}
static long
r9a06g032_div_round_rate(struct clk_hw *hw,
unsigned long rate, unsigned long *prate)
{
struct r9a06g032_clk_div *clk = to_r9a06g032_div(hw);
u32 div = DIV_ROUND_UP(*prate, rate);
pr_devel("%s %pC %ld (prate %ld) (wanted div %u)\n", __func__,
hw->clk, rate, *prate, div);
pr_devel(" min %d (%ld) max %d (%ld)\n",
clk->min, DIV_ROUND_UP(*prate, clk->min),
clk->max, DIV_ROUND_UP(*prate, clk->max));
div = r9a06g032_div_clamp_div(clk, rate, *prate);
/*
* this is a hack. Currently the serial driver asks for a clock rate
* that is 16 times the baud rate -- and that is wildly outside the
* range of the UART divider, somehow there is no provision for that
* case of 'let the divider as is if outside range'.
* The serial driver *shouldn't* play with these clocks anyway, there's
* several uarts attached to this divider, and changing this impacts
* everyone.
*/
if (clk->index == R9A06G032_DIV_UART ||
clk->index == R9A06G032_DIV_P2_PG) {
pr_devel("%s div uart hack!\n", __func__);
return clk_get_rate(hw->clk);
}
pr_devel("%s %pC %ld / %u = %ld\n", __func__, hw->clk,
*prate, div, DIV_ROUND_UP(*prate, div));
return DIV_ROUND_UP(*prate, div);
}
static int
r9a06g032_div_set_rate(struct clk_hw *hw,
unsigned long rate, unsigned long parent_rate)
{
struct r9a06g032_clk_div *clk = to_r9a06g032_div(hw);
/* + 1 to cope with rates that have the remainder dropped */
u32 div = DIV_ROUND_UP(parent_rate, rate + 1);
u32 __iomem *reg = clk->clocks->reg + (4 * clk->reg);
pr_devel("%s %pC rate %ld parent %ld div %d\n", __func__, hw->clk,
rate, parent_rate, div);
/*
* Need to write the bit 31 with the divider value to
* latch it. Technically we should wait until it has been
* cleared too.
* TODO: Find whether this callback is sleepable, in case
* the hardware /does/ require some sort of spinloop here.
*/
writel(div | BIT(31), reg);
return 0;
}
static const struct clk_ops r9a06g032_clk_div_ops = {
.recalc_rate = r9a06g032_div_recalc_rate,
.round_rate = r9a06g032_div_round_rate,
.set_rate = r9a06g032_div_set_rate,
};
static struct clk *
r9a06g032_register_div(struct r9a06g032_priv *clocks,
const char *parent_name,
const struct r9a06g032_clkdesc *desc)
{
struct r9a06g032_clk_div *div;
struct clk *clk;
struct clk_init_data init;
unsigned int i;
div = kzalloc(sizeof(*div), GFP_KERNEL);
if (!div)
return NULL;
init.name = desc->name;
init.ops = &r9a06g032_clk_div_ops;
init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
init.parent_names = parent_name ? &parent_name : NULL;
init.num_parents = parent_name ? 1 : 0;
div->clocks = clocks;
div->index = desc->index;
div->reg = desc->reg;
div->hw.init = &init;
div->min = desc->div_min;
div->max = desc->div_max;
/* populate (optional) divider table fixed values */
for (i = 0; i < ARRAY_SIZE(div->table) &&
i < ARRAY_SIZE(desc->div_table) && desc->div_table[i]; i++) {
div->table[div->table_size++] = desc->div_table[i];
}
clk = clk_register(NULL, &div->hw);
if (IS_ERR(clk)) {
kfree(div);
return NULL;
}
return clk;
}
/*
* This clock provider handles the case of the R9A06G032 where you have
* peripherals that have two potential clock source and two gates, one for
* each of the clock source - the used clock source (for all sub clocks)
* is selected by a single bit.
* That single bit affects all sub-clocks, and therefore needs to change the
* active gate (and turn the others off) and force a recalculation of the rates.
*
* This implements two clock providers, one 'bitselect' that
* handles the switch between both parents, and another 'dualgate'
* that knows which gate to poke at, depending on the parent's bit position.
*/
struct r9a06g032_clk_bitsel {
struct clk_hw hw;
struct r9a06g032_priv *clocks;
u16 index;
u16 selector; /* selector register + bit */
};
#define to_clk_bitselect(_hw) \
container_of(_hw, struct r9a06g032_clk_bitsel, hw)
static u8 r9a06g032_clk_mux_get_parent(struct clk_hw *hw)
{
struct r9a06g032_clk_bitsel *set = to_clk_bitselect(hw);
return clk_rdesc_get(set->clocks, set->selector);
}
static int r9a06g032_clk_mux_set_parent(struct clk_hw *hw, u8 index)
{
struct r9a06g032_clk_bitsel *set = to_clk_bitselect(hw);
/* a single bit in the register selects one of two parent clocks */
clk_rdesc_set(set->clocks, set->selector, !!index);
return 0;
}
static const struct clk_ops clk_bitselect_ops = {
.get_parent = r9a06g032_clk_mux_get_parent,
.set_parent = r9a06g032_clk_mux_set_parent,
};
static struct clk *
r9a06g032_register_bitsel(struct r9a06g032_priv *clocks,
const char *parent_name,
const struct r9a06g032_clkdesc *desc)
{
struct clk *clk;
struct r9a06g032_clk_bitsel *g;
struct clk_init_data init;
const char *names[2];
/* allocate the gate */
g = kzalloc(sizeof(*g), GFP_KERNEL);
if (!g)
return NULL;
names[0] = parent_name;
names[1] = "clk_pll_usb";
init.name = desc->name;
init.ops = &clk_bitselect_ops;
init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
init.parent_names = names;
init.num_parents = 2;
g->clocks = clocks;
g->index = desc->index;
g->selector = desc->dual.sel;
g->hw.init = &init;
clk = clk_register(NULL, &g->hw);
if (IS_ERR(clk)) {
kfree(g);
return NULL;
}
return clk;
}
struct r9a06g032_clk_dualgate {
struct clk_hw hw;
struct r9a06g032_priv *clocks;
u16 index;
u16 selector; /* selector register + bit */
struct r9a06g032_gate gate[2];
};
#define to_clk_dualgate(_hw) \
container_of(_hw, struct r9a06g032_clk_dualgate, hw)
static int
r9a06g032_clk_dualgate_setenable(struct r9a06g032_clk_dualgate *g, int enable)
{
u8 sel_bit = clk_rdesc_get(g->clocks, g->selector);
/* we always turn off the 'other' gate, regardless */
r9a06g032_clk_gate_set(g->clocks, &g->gate[!sel_bit], 0);
r9a06g032_clk_gate_set(g->clocks, &g->gate[sel_bit], enable);
return 0;
}
static int r9a06g032_clk_dualgate_enable(struct clk_hw *hw)
{
struct r9a06g032_clk_dualgate *gate = to_clk_dualgate(hw);
r9a06g032_clk_dualgate_setenable(gate, 1);
return 0;
}
static void r9a06g032_clk_dualgate_disable(struct clk_hw *hw)
{
struct r9a06g032_clk_dualgate *gate = to_clk_dualgate(hw);
r9a06g032_clk_dualgate_setenable(gate, 0);
}
static int r9a06g032_clk_dualgate_is_enabled(struct clk_hw *hw)
{
struct r9a06g032_clk_dualgate *g = to_clk_dualgate(hw);
u8 sel_bit = clk_rdesc_get(g->clocks, g->selector);
return clk_rdesc_get(g->clocks, g->gate[sel_bit].gate);
}
static const struct clk_ops r9a06g032_clk_dualgate_ops = {
.enable = r9a06g032_clk_dualgate_enable,
.disable = r9a06g032_clk_dualgate_disable,
.is_enabled = r9a06g032_clk_dualgate_is_enabled,
};
static struct clk *
r9a06g032_register_dualgate(struct r9a06g032_priv *clocks,
const char *parent_name,
const struct r9a06g032_clkdesc *desc,
uint16_t sel)
{
struct r9a06g032_clk_dualgate *g;
struct clk *clk;
struct clk_init_data init;
/* allocate the gate */
g = kzalloc(sizeof(*g), GFP_KERNEL);
if (!g)
return NULL;
g->clocks = clocks;
g->index = desc->index;
g->selector = sel;
g->gate[0].gate = desc->dual.g1;
g->gate[0].reset = desc->dual.r1;
g->gate[1].gate = desc->dual.g2;
g->gate[1].reset = desc->dual.r2;
init.name = desc->name;
init.ops = &r9a06g032_clk_dualgate_ops;
init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
init.parent_names = &parent_name;
init.num_parents = 1;
g->hw.init = &init;
/*
* important here, some clocks are already in use by the CM3, we
* have to assume they are not Linux's to play with and try to disable
* at the end of the boot!
*/
if (r9a06g032_clk_dualgate_is_enabled(&g->hw)) {
init.flags |= CLK_IS_CRITICAL;
pr_debug("%s was enabled, making read-only\n", desc->name);
}
clk = clk_register(NULL, &g->hw);
if (IS_ERR(clk)) {
kfree(g);
return NULL;
}
return clk;
}
static void r9a06g032_clocks_del_clk_provider(void *data)
{
of_clk_del_provider(data);
}
static int __init r9a06g032_clocks_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct r9a06g032_priv *clocks;
struct clk **clks;
struct clk *mclk;
unsigned int i;
u16 uart_group_sel[2];
int error;
clocks = devm_kzalloc(dev, sizeof(*clocks), GFP_KERNEL);
clks = devm_kcalloc(dev, R9A06G032_CLOCK_COUNT, sizeof(struct clk *),
GFP_KERNEL);
if (!clocks || !clks)
return -ENOMEM;
spin_lock_init(&clocks->lock);
clocks->data.clks = clks;
clocks->data.clk_num = R9A06G032_CLOCK_COUNT;
mclk = devm_clk_get(dev, "mclk");
if (IS_ERR(mclk))
return PTR_ERR(mclk);
clocks->reg = of_iomap(np, 0);
if (WARN_ON(!clocks->reg))
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(r9a06g032_clocks); ++i) {
const struct r9a06g032_clkdesc *d = &r9a06g032_clocks[i];
const char *parent_name = d->source ?
__clk_get_name(clocks->data.clks[d->source - 1]) :
__clk_get_name(mclk);
struct clk *clk = NULL;
switch (d->type) {
case K_FFC:
clk = clk_register_fixed_factor(NULL, d->name,
parent_name, 0,
d->mul, d->div);
break;
case K_GATE:
clk = r9a06g032_register_gate(clocks, parent_name, d);
break;
case K_DIV:
clk = r9a06g032_register_div(clocks, parent_name, d);
break;
case K_BITSEL:
/* keep that selector register around */
uart_group_sel[d->dual.group] = d->dual.sel;
clk = r9a06g032_register_bitsel(clocks, parent_name, d);
break;
case K_DUALGATE:
clk = r9a06g032_register_dualgate(clocks, parent_name,
d,
uart_group_sel[d->dual.group]);
break;
}
clocks->data.clks[d->index] = clk;
}
error = of_clk_add_provider(np, of_clk_src_onecell_get, &clocks->data);
if (error)
return error;
return devm_add_action_or_reset(dev,
r9a06g032_clocks_del_clk_provider, np);
}
static const struct of_device_id r9a06g032_match[] = {
{ .compatible = "renesas,r9a06g032-sysctrl" },
{ }
};
static struct platform_driver r9a06g032_clock_driver = {
.driver = {
.name = "renesas,r9a06g032-sysctrl",
.of_match_table = r9a06g032_match,
},
};
static int __init r9a06g032_clocks_init(void)
{
return platform_driver_probe(&r9a06g032_clock_driver,
r9a06g032_clocks_probe);
}
subsys_initcall(r9a06g032_clocks_init);
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