[U-Boot] [PATCH v2 3/7] rockchip: rk3288: add clock driver
Kever Yang
kever.yang at rock-chips.com
Wed Feb 22 10:13:18 UTC 2017
Add rk3328 clock driver and cru structure definition.
Signed-off-by: William Zhang <william.zhang at rock-chips.com>
Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---
Changes in v2:
- split rockchip_get_cru into arch/arm/mach-rockchip
- fix include header file order
- drop MACRO for I2C reg access
- use OSC_HZ for 24*1024*1024
arch/arm/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 | 597 ++++++++++++++++++++++++
5 files changed, 700 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 0000000..948706e
--- /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 <common.h>
+
+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 8ecf8ee..bbab036 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 0000000..1205516
--- /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 <common.h>
+#include <dm.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cru_rk3328.h>
+
+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 1f8e417..c4e81e9 100644
--- a/drivers/clk/rockchip/Makefile
+++ b/drivers/clk/rockchip/Makefile
@@ -6,4 +6,5 @@
obj-$(CONFIG_ROCKCHIP_RK3036) += clk_rk3036.o
obj-$(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 0000000..4428a80
--- /dev/null
+++ b/drivers/clk/rockchip/clk_rk3328.c
@@ -0,0 +1,597 @@
+/*
+ * (C) Copyright 2017 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <syscon.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cru_rk3328.h>
+#include <asm/arch/hardware.h>
+#include <asm/io.h>
+#include <dm/lists.h>
+#include <dt-bindings/clock/rk3328-cru.h>
+
+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 I2C_CLK_REG_MASK(bus) \
+ (CLK_I2C_DIV_CON_MASK << \
+ CLK_I2C ##bus## _DIV_CON_SHIFT | \
+ CLK_I2C_PLL_SEL_MASK << \
+ CLK_I2C ##bus## _PLL_SEL_SHIFT)
+
+#define I2C_CLK_REG_VALUE(bus, clk_div) \
+ ((clk_div - 1) << \
+ CLK_I2C ##bus## _DIV_CON_SHIFT | \
+ CLK_I2C_PLL_SEL_GPLL << \
+ CLK_I2C ##bus## _PLL_SEL_SHIFT)
+
+#define I2C_CLK_DIV_VALUE(con, bus) \
+ (con >> CLK_I2C ##bus## _DIV_CON_SHIFT) & \
+ CLK_I2C_DIV_CON_MASK;
+
+#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,
+};
--
1.9.1
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