From 41793000d77172a7472aad256049473c00e29dc5 Mon Sep 17 00:00:00 2001 From: Kever Yang Date: Thu, 23 Feb 2017 15:37:52 +0800 Subject: [PATCH] rockchip: rk3328: add clock driver Add rk3328 clock driver and cru structure definition. Signed-off-by: William Zhang Signed-off-by: Kever Yang --- .../include/asm/arch-rockchip/cru_rk3328.h | 70 +++ arch/arm/mach-rockchip/rk3328/Makefile | 1 + arch/arm/mach-rockchip/rk3328/clk_rk3328.c | 31 + drivers/clk/rockchip/Makefile | 1 + drivers/clk/rockchip/clk_rk3328.c | 581 ++++++++++++++++++ 5 files changed, 684 insertions(+) create mode 100644 arch/arm/include/asm/arch-rockchip/cru_rk3328.h create mode 100644 arch/arm/mach-rockchip/rk3328/clk_rk3328.c create mode 100644 drivers/clk/rockchip/clk_rk3328.c diff --git a/arch/arm/include/asm/arch-rockchip/cru_rk3328.h b/arch/arm/include/asm/arch-rockchip/cru_rk3328.h new file mode 100644 index 0000000000..948706e9a3 --- /dev/null +++ b/arch/arm/include/asm/arch-rockchip/cru_rk3328.h @@ -0,0 +1,70 @@ +/* + * (C) Copyright 2016 Rockchip Electronics Co., Ltd + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ASM_ARCH_CRU_RK3328_H_ +#define __ASM_ARCH_CRU_RK3328_H_ + +#include + +struct rk3328_clk_priv { + struct rk3328_cru *cru; + ulong rate; +}; + +struct rk3328_cru { + u32 apll_con[5]; + u32 reserved1[3]; + u32 dpll_con[5]; + u32 reserved2[3]; + u32 cpll_con[5]; + u32 reserved3[3]; + u32 gpll_con[5]; + u32 reserved4[3]; + u32 mode_con; + u32 misc; + u32 reserved5[2]; + u32 glb_cnt_th; + u32 glb_rst_st; + u32 glb_srst_snd_value; + u32 glb_srst_fst_value; + u32 npll_con[5]; + u32 reserved6[(0x100 - 0xb4) / 4]; + u32 clksel_con[53]; + u32 reserved7[(0x200 - 0x1d4) / 4]; + u32 clkgate_con[29]; + u32 reserved8[3]; + u32 ssgtbl[32]; + u32 softrst_con[12]; + u32 reserved9[(0x380 - 0x330) / 4]; + u32 sdmmc_con[2]; + u32 sdio_con[2]; + u32 emmc_con[2]; + u32 sdmmc_ext_con[2]; +}; +check_member(rk3328_cru, sdmmc_ext_con[1], 0x39c); +#define MHz 1000000 +#define KHz 1000 +#define OSC_HZ (24 * MHz) +#define APLL_HZ (600 * MHz) +#define GPLL_HZ (576 * MHz) +#define CPLL_HZ (594 * MHz) + +#define CLK_CORE_HZ (600 * MHz) +#define ACLKM_CORE_HZ (300 * MHz) +#define PCLK_DBG_HZ (300 * MHz) + +#define PERIHP_ACLK_HZ (144000 * KHz) +#define PERIHP_HCLK_HZ (72000 * KHz) +#define PERIHP_PCLK_HZ (72000 * KHz) + +#define PWM_CLOCK_HZ (74 * MHz) + +enum apll_frequencies { + APLL_816_MHZ, + APLL_600_MHZ, +}; + +#endif /* __ASM_ARCH_CRU_RK3328_H_ */ diff --git a/arch/arm/mach-rockchip/rk3328/Makefile b/arch/arm/mach-rockchip/rk3328/Makefile index 8ecf8eed1c..bbab036a12 100644 --- a/arch/arm/mach-rockchip/rk3328/Makefile +++ b/arch/arm/mach-rockchip/rk3328/Makefile @@ -4,5 +4,6 @@ # SPDX-License-Identifier: GPL-2.0+ # +obj-y += clk_rk3328.o obj-y += rk3328.o obj-y += syscon_rk3328.o diff --git a/arch/arm/mach-rockchip/rk3328/clk_rk3328.c b/arch/arm/mach-rockchip/rk3328/clk_rk3328.c new file mode 100644 index 0000000000..1205516227 --- /dev/null +++ b/arch/arm/mach-rockchip/rk3328/clk_rk3328.c @@ -0,0 +1,31 @@ +/* + * (C) Copyright 2017 Rockchip Electronics Co., Ltd + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include +#include +#include +#include + +int rockchip_get_clk(struct udevice **devp) +{ + return uclass_get_device_by_driver(UCLASS_CLK, + DM_GET_DRIVER(rockchip_rk3328_cru), devp); +} + +void *rockchip_get_cru(void) +{ + struct rk3328_clk_priv *priv; + struct udevice *dev; + int ret; + + ret = rockchip_get_clk(&dev); + if (ret) + return ERR_PTR(ret); + + priv = dev_get_addr_ptr(dev); + + return priv->cru; +} diff --git a/drivers/clk/rockchip/Makefile b/drivers/clk/rockchip/Makefile index b66e81e810..1091a76f05 100644 --- a/drivers/clk/rockchip/Makefile +++ b/drivers/clk/rockchip/Makefile @@ -7,4 +7,5 @@ obj-$(CONFIG_ROCKCHIP_RK3036) += clk_rk3036.o obj-$(CONFIG_ROCKCHIP_RK3188) += clk_rk3188.o obj-$(CONFIG_ROCKCHIP_RK3288) += clk_rk3288.o +obj-$(CONFIG_ROCKCHIP_RK3328) += clk_rk3328.o obj-$(CONFIG_ROCKCHIP_RK3399) += clk_rk3399.o diff --git a/drivers/clk/rockchip/clk_rk3328.c b/drivers/clk/rockchip/clk_rk3328.c new file mode 100644 index 0000000000..0ff1e30bb5 --- /dev/null +++ b/drivers/clk/rockchip/clk_rk3328.c @@ -0,0 +1,581 @@ +/* + * (C) Copyright 2017 Rockchip Electronics Co., Ltd + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +struct pll_div { + u32 refdiv; + u32 fbdiv; + u32 postdiv1; + u32 postdiv2; + u32 frac; +}; + +#define RATE_TO_DIV(input_rate, output_rate) \ + ((input_rate) / (output_rate) - 1); +#define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1)) + +#define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\ + .refdiv = _refdiv,\ + .fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ),\ + .postdiv1 = _postdiv1, .postdiv2 = _postdiv2}; + +static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 1, 4, 1); +static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 2, 2, 1); + +static const struct pll_div apll_816_cfg = PLL_DIVISORS(816 * MHz, 1, 2, 1); +static const struct pll_div apll_600_cfg = PLL_DIVISORS(600 * MHz, 1, 3, 1); + +static const struct pll_div *apll_cfgs[] = { + [APLL_816_MHZ] = &apll_816_cfg, + [APLL_600_MHZ] = &apll_600_cfg, +}; + +enum { + /* PLL_CON0 */ + PLL_POSTDIV1_SHIFT = 12, + PLL_POSTDIV1_MASK = 0x7 << PLL_POSTDIV1_SHIFT, + PLL_FBDIV_SHIFT = 0, + PLL_FBDIV_MASK = 0xfff, + + /* PLL_CON1 */ + PLL_DSMPD_SHIFT = 12, + PLL_DSMPD_MASK = 1 << PLL_DSMPD_SHIFT, + PLL_INTEGER_MODE = 1, + PLL_LOCK_STATUS_SHIFT = 10, + PLL_LOCK_STATUS_MASK = 1 << PLL_LOCK_STATUS_SHIFT, + PLL_POSTDIV2_SHIFT = 6, + PLL_POSTDIV2_MASK = 0x7 << PLL_POSTDIV2_SHIFT, + PLL_REFDIV_SHIFT = 0, + PLL_REFDIV_MASK = 0x3f, + + /* PLL_CON2 */ + PLL_FRACDIV_SHIFT = 0, + PLL_FRACDIV_MASK = 0xffffff, + + /* MODE_CON */ + APLL_MODE_SHIFT = 0, + NPLL_MODE_SHIFT = 1, + DPLL_MODE_SHIFT = 4, + CPLL_MODE_SHIFT = 8, + GPLL_MODE_SHIFT = 12, + PLL_MODE_SLOW = 0, + PLL_MODE_NORM, + + /* CLKSEL_CON0 */ + CLK_CORE_PLL_SEL_APLL = 0, + CLK_CORE_PLL_SEL_GPLL, + CLK_CORE_PLL_SEL_DPLL, + CLK_CORE_PLL_SEL_NPLL, + CLK_CORE_PLL_SEL_SHIFT = 6, + CLK_CORE_PLL_SEL_MASK = 3 << CLK_CORE_PLL_SEL_SHIFT, + CLK_CORE_DIV_SHIFT = 0, + CLK_CORE_DIV_MASK = 0x1f, + + /* CLKSEL_CON1 */ + ACLKM_CORE_DIV_SHIFT = 4, + ACLKM_CORE_DIV_MASK = 0x7 << ACLKM_CORE_DIV_SHIFT, + PCLK_DBG_DIV_SHIFT = 0, + PCLK_DBG_DIV_MASK = 0xF << PCLK_DBG_DIV_SHIFT, + + /* CLKSEL_CON28 */ + ACLK_PERIHP_PLL_SEL_CPLL = 0, + ACLK_PERIHP_PLL_SEL_GPLL, + ACLK_PERIHP_PLL_SEL_HDMIPHY, + ACLK_PERIHP_PLL_SEL_SHIFT = 6, + ACLK_PERIHP_PLL_SEL_MASK = 3 << ACLK_PERIHP_PLL_SEL_SHIFT, + ACLK_PERIHP_DIV_CON_SHIFT = 0, + ACLK_PERIHP_DIV_CON_MASK = 0x1f, + + /* CLKSEL_CON29 */ + PCLK_PERIHP_DIV_CON_SHIFT = 4, + PCLK_PERIHP_DIV_CON_MASK = 0x7 << PCLK_PERIHP_DIV_CON_SHIFT, + HCLK_PERIHP_DIV_CON_SHIFT = 0, + HCLK_PERIHP_DIV_CON_MASK = 3 << HCLK_PERIHP_DIV_CON_SHIFT, + + /* CLKSEL_CON22 */ + CLK_TSADC_DIV_CON_SHIFT = 0, + CLK_TSADC_DIV_CON_MASK = 0x3ff, + + /* CLKSEL_CON23 */ + CLK_SARADC_DIV_CON_SHIFT = 0, + CLK_SARADC_DIV_CON_MASK = 0x3ff << CLK_SARADC_DIV_CON_SHIFT, + + /* CLKSEL_CON24 */ + CLK_PWM_PLL_SEL_CPLL = 0, + CLK_PWM_PLL_SEL_GPLL, + CLK_PWM_PLL_SEL_SHIFT = 15, + CLK_PWM_PLL_SEL_MASK = 1 << CLK_PWM_PLL_SEL_SHIFT, + CLK_PWM_DIV_CON_SHIFT = 8, + CLK_PWM_DIV_CON_MASK = 0x7f << CLK_PWM_DIV_CON_SHIFT, + + CLK_SPI_PLL_SEL_CPLL = 0, + CLK_SPI_PLL_SEL_GPLL, + CLK_SPI_PLL_SEL_SHIFT = 7, + CLK_SPI_PLL_SEL_MASK = 1 << CLK_SPI_PLL_SEL_SHIFT, + CLK_SPI_DIV_CON_SHIFT = 0, + CLK_SPI_DIV_CON_MASK = 0x7f << CLK_SPI_DIV_CON_SHIFT, + + /* CLKSEL_CON30 */ + CLK_SDMMC_PLL_SEL_CPLL = 0, + CLK_SDMMC_PLL_SEL_GPLL, + CLK_SDMMC_PLL_SEL_24M, + CLK_SDMMC_PLL_SEL_USBPHY, + CLK_SDMMC_PLL_SHIFT = 8, + CLK_SDMMC_PLL_MASK = 0x3 << CLK_SDMMC_PLL_SHIFT, + CLK_SDMMC_DIV_CON_SHIFT = 0, + CLK_SDMMC_DIV_CON_MASK = 0xff << CLK_SDMMC_DIV_CON_SHIFT, + + /* CLKSEL_CON32 */ + CLK_EMMC_PLL_SEL_CPLL = 0, + CLK_EMMC_PLL_SEL_GPLL, + CLK_EMMC_PLL_SEL_24M, + CLK_EMMC_PLL_SEL_USBPHY, + CLK_EMMC_PLL_SHIFT = 8, + CLK_EMMC_PLL_MASK = 0x3 << CLK_EMMC_PLL_SHIFT, + CLK_EMMC_DIV_CON_SHIFT = 0, + CLK_EMMC_DIV_CON_MASK = 0xff << CLK_EMMC_DIV_CON_SHIFT, + + /* CLKSEL_CON34 */ + CLK_I2C_PLL_SEL_CPLL = 0, + CLK_I2C_PLL_SEL_GPLL, + CLK_I2C_DIV_CON_MASK = 0x7f, + CLK_I2C_PLL_SEL_MASK = 1, + CLK_I2C1_PLL_SEL_SHIFT = 15, + CLK_I2C1_DIV_CON_SHIFT = 8, + CLK_I2C0_PLL_SEL_SHIFT = 7, + CLK_I2C0_DIV_CON_SHIFT = 0, + + /* CLKSEL_CON35 */ + CLK_I2C3_PLL_SEL_SHIFT = 15, + CLK_I2C3_DIV_CON_SHIFT = 8, + CLK_I2C2_PLL_SEL_SHIFT = 7, + CLK_I2C2_DIV_CON_SHIFT = 0, +}; + +#define VCO_MAX_KHZ (3200 * (MHz / KHz)) +#define VCO_MIN_KHZ (800 * (MHz / KHz)) +#define OUTPUT_MAX_KHZ (3200 * (MHz / KHz)) +#define OUTPUT_MIN_KHZ (16 * (MHz / KHz)) + +/* + * the div restructions of pll in integer mode, these are defined in + * * CRU_*PLL_CON0 or PMUCRU_*PLL_CON0 + */ +#define PLL_DIV_MIN 16 +#define PLL_DIV_MAX 3200 + +/* + * How to calculate the PLL(from TRM V0.3 Part 1 Page 63): + * Formulas also embedded within the Fractional PLL Verilog model: + * If DSMPD = 1 (DSM is disabled, "integer mode") + * FOUTVCO = FREF / REFDIV * FBDIV + * FOUTPOSTDIV = FOUTVCO / POSTDIV1 / POSTDIV2 + * Where: + * FOUTVCO = Fractional PLL non-divided output frequency + * FOUTPOSTDIV = Fractional PLL divided output frequency + * (output of second post divider) + * FREF = Fractional PLL input reference frequency, (the OSC_HZ 24MHz input) + * REFDIV = Fractional PLL input reference clock divider + * FBDIV = Integer value programmed into feedback divide + * + */ +static void rkclk_set_pll(struct rk3328_cru *cru, enum rk_clk_id clk_id, + const struct pll_div *div) +{ + u32 *pll_con; + u32 mode_shift, mode_mask; + + pll_con = NULL; + mode_shift = 0; + switch (clk_id) { + case CLK_ARM: + pll_con = cru->apll_con; + mode_shift = APLL_MODE_SHIFT; + break; + case CLK_DDR: + pll_con = cru->dpll_con; + mode_shift = DPLL_MODE_SHIFT; + break; + case CLK_CODEC: + pll_con = cru->cpll_con; + mode_shift = CPLL_MODE_SHIFT; + break; + case CLK_GENERAL: + pll_con = cru->gpll_con; + mode_shift = GPLL_MODE_SHIFT; + break; + case CLK_NEW: + pll_con = cru->npll_con; + mode_shift = NPLL_MODE_SHIFT; + break; + default: + break; + } + mode_mask = 1 << mode_shift; + + /* All 8 PLLs have same VCO and output frequency range restrictions. */ + u32 vco_khz = OSC_HZ / 1000 * div->fbdiv / div->refdiv; + u32 output_khz = vco_khz / div->postdiv1 / div->postdiv2; + + debug("PLL at %p: fbdiv=%d, refdiv=%d, postdiv1=%d, \ + postdiv2=%d, vco=%u khz, output=%u khz\n", + pll_con, div->fbdiv, div->refdiv, div->postdiv1, + div->postdiv2, vco_khz, output_khz); + assert(vco_khz >= VCO_MIN_KHZ && vco_khz <= VCO_MAX_KHZ && + output_khz >= OUTPUT_MIN_KHZ && output_khz <= OUTPUT_MAX_KHZ && + div->fbdiv >= PLL_DIV_MIN && div->fbdiv <= PLL_DIV_MAX); + + /* + * When power on or changing PLL setting, + * we must force PLL into slow mode to ensure output stable clock. + */ + rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_SLOW << mode_shift); + + /* use integer mode */ + rk_clrsetreg(&pll_con[1], PLL_DSMPD_MASK, + PLL_INTEGER_MODE << PLL_DSMPD_SHIFT); + + rk_clrsetreg(&pll_con[0], + PLL_FBDIV_MASK | PLL_POSTDIV1_MASK, + (div->fbdiv << PLL_FBDIV_SHIFT) | + (div->postdiv1 << PLL_POSTDIV1_SHIFT)); + rk_clrsetreg(&pll_con[1], + PLL_POSTDIV2_MASK | PLL_REFDIV_MASK, + (div->postdiv2 << PLL_POSTDIV2_SHIFT) | + (div->refdiv << PLL_REFDIV_SHIFT)); + + /* waiting for pll lock */ + while (!(readl(&pll_con[1]) & (1 << PLL_LOCK_STATUS_SHIFT))) + udelay(1); + + /* pll enter normal mode */ + rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_NORM << mode_shift); +} + +static void rkclk_init(struct rk3328_cru *cru) +{ + u32 aclk_div; + u32 hclk_div; + u32 pclk_div; + + /* configure gpll cpll */ + rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg); + rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg); + + /* configure perihp aclk, hclk, pclk */ + aclk_div = GPLL_HZ / PERIHP_ACLK_HZ - 1; + hclk_div = PERIHP_ACLK_HZ / PERIHP_HCLK_HZ - 1; + pclk_div = PERIHP_ACLK_HZ / PERIHP_PCLK_HZ - 1; + + rk_clrsetreg(&cru->clksel_con[28], + ACLK_PERIHP_PLL_SEL_MASK | ACLK_PERIHP_DIV_CON_MASK, + ACLK_PERIHP_PLL_SEL_GPLL << ACLK_PERIHP_PLL_SEL_SHIFT | + aclk_div << ACLK_PERIHP_DIV_CON_SHIFT); + rk_clrsetreg(&cru->clksel_con[29], + PCLK_PERIHP_DIV_CON_MASK | HCLK_PERIHP_DIV_CON_MASK, + pclk_div << PCLK_PERIHP_DIV_CON_SHIFT | + hclk_div << HCLK_PERIHP_DIV_CON_SHIFT); +} + +void rk3328_configure_cpu(struct rk3328_cru *cru, + enum apll_frequencies apll_freq) +{ + u32 clk_core_div; + u32 aclkm_div; + u32 pclk_dbg_div; + + rkclk_set_pll(cru, CLK_ARM, apll_cfgs[apll_freq]); + + clk_core_div = APLL_HZ / CLK_CORE_HZ - 1; + aclkm_div = APLL_HZ / ACLKM_CORE_HZ / (clk_core_div + 1) - 1; + pclk_dbg_div = APLL_HZ / PCLK_DBG_HZ / (clk_core_div + 1) - 1; + + rk_clrsetreg(&cru->clksel_con[0], + CLK_CORE_PLL_SEL_MASK | CLK_CORE_DIV_MASK, + CLK_CORE_PLL_SEL_APLL << CLK_CORE_PLL_SEL_SHIFT | + clk_core_div << CLK_CORE_DIV_SHIFT); + + rk_clrsetreg(&cru->clksel_con[1], + PCLK_DBG_DIV_MASK | ACLKM_CORE_DIV_MASK, + pclk_dbg_div << PCLK_DBG_DIV_SHIFT | + aclkm_div << ACLKM_CORE_DIV_SHIFT); +} + + +static ulong rk3328_i2c_get_clk(struct rk3328_cru *cru, ulong clk_id) +{ + u32 div, con; + + switch (clk_id) { + case SCLK_I2C0: + con = readl(&cru->clksel_con[34]); + div = con >> CLK_I2C0_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK; + break; + case SCLK_I2C1: + con = readl(&cru->clksel_con[34]); + div = con >> CLK_I2C1_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK; + break; + case SCLK_I2C2: + con = readl(&cru->clksel_con[35]); + div = con >> CLK_I2C2_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK; + break; + case SCLK_I2C3: + con = readl(&cru->clksel_con[35]); + div = con >> CLK_I2C3_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK; + break; + default: + printf("do not support this i2c bus\n"); + return -EINVAL; + } + + return DIV_TO_RATE(GPLL_HZ, div); +} + +static ulong rk3328_i2c_set_clk(struct rk3328_cru *cru, ulong clk_id, uint hz) +{ + int src_clk_div; + + src_clk_div = GPLL_HZ / hz; + assert(src_clk_div - 1 < 127); + + switch (clk_id) { + case SCLK_I2C0: + rk_clrsetreg(&cru->clksel_con[34], + CLK_I2C_DIV_CON_MASK << CLK_I2C0_DIV_CON_SHIFT | + CLK_I2C_PLL_SEL_MASK << CLK_I2C0_PLL_SEL_SHIFT, + (src_clk_div - 1) << CLK_I2C0_DIV_CON_SHIFT | + CLK_I2C_PLL_SEL_GPLL << CLK_I2C0_PLL_SEL_SHIFT); + break; + case SCLK_I2C1: + rk_clrsetreg(&cru->clksel_con[34], + CLK_I2C_DIV_CON_MASK << CLK_I2C1_DIV_CON_SHIFT | + CLK_I2C_PLL_SEL_MASK << CLK_I2C1_PLL_SEL_SHIFT, + (src_clk_div - 1) << CLK_I2C1_DIV_CON_SHIFT | + CLK_I2C_PLL_SEL_GPLL << CLK_I2C1_PLL_SEL_SHIFT); + break; + case SCLK_I2C2: + rk_clrsetreg(&cru->clksel_con[35], + CLK_I2C_DIV_CON_MASK << CLK_I2C2_DIV_CON_SHIFT | + CLK_I2C_PLL_SEL_MASK << CLK_I2C2_PLL_SEL_SHIFT, + (src_clk_div - 1) << CLK_I2C2_DIV_CON_SHIFT | + CLK_I2C_PLL_SEL_GPLL << CLK_I2C2_PLL_SEL_SHIFT); + break; + case SCLK_I2C3: + rk_clrsetreg(&cru->clksel_con[35], + CLK_I2C_DIV_CON_MASK << CLK_I2C3_DIV_CON_SHIFT | + CLK_I2C_PLL_SEL_MASK << CLK_I2C3_PLL_SEL_SHIFT, + (src_clk_div - 1) << CLK_I2C3_DIV_CON_SHIFT | + CLK_I2C_PLL_SEL_GPLL << CLK_I2C3_PLL_SEL_SHIFT); + break; + default: + printf("do not support this i2c bus\n"); + return -EINVAL; + } + + return DIV_TO_RATE(GPLL_HZ, src_clk_div); +} + +static ulong rk3328_mmc_get_clk(struct rk3328_cru *cru, uint clk_id) +{ + u32 div, con, con_id; + + switch (clk_id) { + case HCLK_SDMMC: + con_id = 30; + break; + case HCLK_EMMC: + con_id = 32; + break; + default: + return -EINVAL; + } + con = readl(&cru->clksel_con[con_id]); + div = (con & CLK_EMMC_DIV_CON_MASK) >> CLK_EMMC_DIV_CON_SHIFT; + + if ((con & CLK_EMMC_PLL_MASK) >> CLK_EMMC_PLL_SHIFT + == CLK_EMMC_PLL_SEL_24M) + return DIV_TO_RATE(OSC_HZ, div); + else + return DIV_TO_RATE(GPLL_HZ, div); +} + +static ulong rk3328_mmc_set_clk(struct rk3328_cru *cru, + ulong clk_id, ulong set_rate) +{ + int src_clk_div; + u32 con_id; + + switch (clk_id) { + case HCLK_SDMMC: + con_id = 30; + break; + case HCLK_EMMC: + con_id = 32; + break; + default: + return -EINVAL; + } + /* Select clk_sdmmc/emmc source from GPLL by default */ + src_clk_div = GPLL_HZ / set_rate; + + if (src_clk_div > 127) { + /* use 24MHz source for 400KHz clock */ + src_clk_div = OSC_HZ / set_rate; + rk_clrsetreg(&cru->clksel_con[con_id], + CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK, + CLK_EMMC_PLL_SEL_24M << CLK_EMMC_PLL_SHIFT | + (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT); + } else { + rk_clrsetreg(&cru->clksel_con[con_id], + CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK, + CLK_EMMC_PLL_SEL_GPLL << CLK_EMMC_PLL_SHIFT | + (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT); + } + + return rk3328_mmc_get_clk(cru, clk_id); +} + +static ulong rk3328_pwm_get_clk(struct rk3328_cru *cru) +{ + u32 div, con; + + con = readl(&cru->clksel_con[24]); + div = (con & CLK_PWM_DIV_CON_MASK) >> CLK_PWM_DIV_CON_SHIFT; + + return DIV_TO_RATE(GPLL_HZ, div); +} + +static ulong rk3328_pwm_set_clk(struct rk3328_cru *cru, uint hz) +{ + u32 div = GPLL_HZ / hz; + + rk_clrsetreg(&cru->clksel_con[24], + CLK_PWM_PLL_SEL_MASK | CLK_PWM_DIV_CON_MASK, + CLK_PWM_PLL_SEL_GPLL << CLK_PWM_PLL_SEL_SHIFT | + (div - 1) << CLK_PWM_DIV_CON_SHIFT); + + return DIV_TO_RATE(GPLL_HZ, div); +} + +static ulong rk3328_clk_get_rate(struct clk *clk) +{ + struct rk3328_clk_priv *priv = dev_get_priv(clk->dev); + ulong rate = 0; + + switch (clk->id) { + case 0 ... 29: + return 0; + case HCLK_SDMMC: + case HCLK_EMMC: + rate = rk3328_mmc_get_clk(priv->cru, clk->id); + break; + case SCLK_I2C0: + case SCLK_I2C1: + case SCLK_I2C2: + case SCLK_I2C3: + rate = rk3328_i2c_get_clk(priv->cru, clk->id); + break; + case SCLK_PWM: + rate = rk3328_pwm_get_clk(priv->cru); + break; + default: + return -ENOENT; + } + + return rate; +} + +static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate) +{ + struct rk3328_clk_priv *priv = dev_get_priv(clk->dev); + ulong ret = 0; + + switch (clk->id) { + case 0 ... 29: + return 0; + case HCLK_SDMMC: + case HCLK_EMMC: + ret = rk3328_mmc_set_clk(priv->cru, clk->id, rate); + break; + case SCLK_I2C0: + case SCLK_I2C1: + case SCLK_I2C2: + case SCLK_I2C3: + ret = rk3328_i2c_set_clk(priv->cru, clk->id, rate); + break; + case SCLK_PWM: + ret = rk3328_pwm_set_clk(priv->cru, rate); + break; + default: + return -ENOENT; + } + + return ret; +} + +static struct clk_ops rk3328_clk_ops = { + .get_rate = rk3328_clk_get_rate, + .set_rate = rk3328_clk_set_rate, +}; + +static int rk3328_clk_probe(struct udevice *dev) +{ + struct rk3328_clk_priv *priv = dev_get_priv(dev); + + rkclk_init(priv->cru); + + return 0; +} + +static int rk3328_clk_ofdata_to_platdata(struct udevice *dev) +{ + struct rk3328_clk_priv *priv = dev_get_priv(dev); + + priv->cru = (struct rk3328_cru *)dev_get_addr(dev); + + return 0; +} + +static int rk3328_clk_bind(struct udevice *dev) +{ + int ret; + + /* The reset driver does not have a device node, so bind it here */ + ret = device_bind_driver(gd->dm_root, "rk3328_sysreset", "reset", &dev); + if (ret) + printf("Warning: No RK3328 reset driver: ret=%d\n", ret); + + return ret; +} + +static const struct udevice_id rk3328_clk_ids[] = { + { .compatible = "rockchip,rk3328-cru" }, + { } +}; + +U_BOOT_DRIVER(rockchip_rk3328_cru) = { + .name = "rockchip_rk3328_cru", + .id = UCLASS_CLK, + .of_match = rk3328_clk_ids, + .priv_auto_alloc_size = sizeof(struct rk3328_clk_priv), + .ofdata_to_platdata = rk3328_clk_ofdata_to_platdata, + .ops = &rk3328_clk_ops, + .bind = rk3328_clk_bind, + .probe = rk3328_clk_probe, +}; -- 2.39.5