diff options
Diffstat (limited to 'drivers/clk/renesas/r9a06g032-clocks.c')
| -rw-r--r-- | drivers/clk/renesas/r9a06g032-clocks.c | 894 |
1 files changed, 894 insertions, 0 deletions
diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c new file mode 100644 index 000000000..6e03b4673 --- /dev/null +++ b/drivers/clk/renesas/r9a06g032-clocks.c @@ -0,0 +1,894 @@ +// 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; + }; +}; + +#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); |