rockchip: rk3188: Add clock driver

Add a driver for setting up and modifying the various PLLs and peripheral
clocks on the RK3188.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Kever Yang <kever.yang@rock-chips.com>

arch/arm/include/asm/arch-rockchip/cru_rk3188.h

@@ -0,0 +1,191 @@
+/*
+ * (C) Copyright 2016 Heiko Stuebner <heiko@sntech.de>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+#ifndef _ASM_ARCH_CRU_RK3188_H
+#define _ASM_ARCH_CRU_RK3188_H
+
+#define OSC_HZ		(24 * 1000 * 1000)
+
+#define APLL_HZ		(1608 * 1000000)
+#define GPLL_HZ		(594 * 1000000)
+#define CPLL_HZ		(384 * 1000000)
+
+/* The SRAM is clocked off aclk_cpu, so we want to max it out for boot speed */
+#define CPU_ACLK_HZ	297000000
+#define CPU_HCLK_HZ	148500000
+#define CPU_PCLK_HZ	74250000
+#define CPU_H2P_HZ	74250000
+
+#define PERI_ACLK_HZ	148500000
+#define PERI_HCLK_HZ	148500000
+#define PERI_PCLK_HZ	74250000
+
+/* Private data for the clock driver - used by rockchip_get_cru() */
+struct rk3188_clk_priv {
+	struct rk3188_grf *grf;
+	struct rk3188_cru *cru;
+	ulong rate;
+	bool has_bwadj;
+};
+
+struct rk3188_cru {
+	struct rk3188_pll {
+		u32 con0;
+		u32 con1;
+		u32 con2;
+		u32 con3;
+	} pll[4];
+	u32 cru_mode_con;
+	u32 cru_clksel_con[35];
+	u32 cru_clkgate_con[10];
+	u32 reserved1[2];
+	u32 cru_glb_srst_fst_value;
+	u32 cru_glb_srst_snd_value;
+	u32 reserved2[2];
+	u32 cru_softrst_con[9];
+	u32 cru_misc_con;
+	u32 reserved3[2];
+	u32 cru_glb_cnt_th;
+};
+check_member(rk3188_cru, cru_glb_cnt_th, 0x0140);
+
+/* CRU_CLKSEL0_CON */
+enum {
+	/* a9_core_div: core = core_src / (a9_core_div + 1) */
+	A9_CORE_DIV_SHIFT	= 9,
+	A9_CORE_DIV_MASK	= 0x1f,
+	CORE_PLL_SHIFT		= 8,
+	CORE_PLL_MASK		= 1,
+	CORE_PLL_SELECT_APLL	= 0,
+	CORE_PLL_SELECT_GPLL,
+
+	/* core peri div: core:core_peri = 2:1, 4:1, 8:1 or 16:1 */
+	CORE_PERI_DIV_SHIFT	= 6,
+	CORE_PERI_DIV_MASK	= 3,
+
+	/* aclk_cpu pll selection */
+	CPU_ACLK_PLL_SHIFT	= 5,
+	CPU_ACLK_PLL_MASK	= 1,
+	CPU_ACLK_PLL_SELECT_APLL	= 0,
+	CPU_ACLK_PLL_SELECT_GPLL,
+
+	/* a9_cpu_div: aclk_cpu = cpu_src / (a9_cpu_div + 1) */
+	A9_CPU_DIV_SHIFT	= 0,
+	A9_CPU_DIV_MASK		= 0x1f,
+};
+
+/* CRU_CLKSEL1_CON */
+enum {
+	/* ahb2apb_pclk_div: hclk_cpu:pclk_cpu = 1:1, 2:1 or 4:1 */
+	AHB2APB_DIV_SHIFT	= 14,
+	AHB2APB_DIV_MASK	= 3,
+
+	/* cpu_pclk_div: aclk_cpu:pclk_cpu = 1:1, 2:1, 4:1 or 8:1 */
+	CPU_PCLK_DIV_SHIFT	= 12,
+	CPU_PCLK_DIV_MASK	= 3,
+
+	/* cpu_hclk_div: aclk_cpu:hclk_cpu = 1:1, 2:1 or 4:1 */
+	CPU_HCLK_DIV_SHIFT	= 8,
+	CPU_HCLK_DIV_MASK	= 3,
+
+	/* core_aclk_div: cire:aclk_core = 1:1, 2:1, 3:1, 4:1 or 8:1 */
+	CORE_ACLK_DIV_SHIFT	= 3,
+	CORE_ACLK_DIV_MASK	= 7,
+};
+
+/* CRU_CLKSEL10_CON */
+enum {
+	PERI_SEL_PLL_MASK	= 1,
+	PERI_SEL_PLL_SHIFT	= 15,
+	PERI_SEL_CPLL		= 0,
+	PERI_SEL_GPLL,
+
+	/* peri pclk div: aclk_bus:pclk_bus = 1:1, 2:1, 4:1 or 8:1 */
+	PERI_PCLK_DIV_SHIFT	= 12,
+	PERI_PCLK_DIV_MASK	= 3,
+
+	/* peripheral bus hclk div:aclk_bus: hclk_bus = 1:1, 2:1 or 4:1 */
+	PERI_HCLK_DIV_SHIFT	= 8,
+	PERI_HCLK_DIV_MASK	= 3,
+
+	/* peri aclk div: aclk_peri = periph_src / (peri_aclk_div + 1) */
+	PERI_ACLK_DIV_SHIFT	= 0,
+	PERI_ACLK_DIV_MASK	= 0x1f,
+};
+/* CRU_CLKSEL11_CON */
+enum {
+	HSICPHY_DIV_SHIFT	= 8,
+	HSICPHY_DIV_MASK	= 0x3f,
+
+	MMC0_DIV_SHIFT		= 0,
+	MMC0_DIV_MASK		= 0x3f,
+};
+
+/* CRU_CLKSEL12_CON */
+enum {
+	UART_PLL_SHIFT		= 15,
+	UART_PLL_MASK		= 1,
+	UART_PLL_SELECT_GENERAL	= 0,
+	UART_PLL_SELECT_CODEC,
+
+	EMMC_DIV_SHIFT		= 8,
+	EMMC_DIV_MASK		= 0x3f,
+
+	SDIO_DIV_SHIFT		= 0,
+	SDIO_DIV_MASK		= 0x3f,
+};
+
+/* CRU_CLKSEL25_CON */
+enum {
+	SPI1_DIV_SHIFT		= 8,
+	SPI1_DIV_MASK		= 0x7f,
+
+	SPI0_DIV_SHIFT		= 0,
+	SPI0_DIV_MASK		= 0x7f,
+};
+
+/* CRU_MODE_CON */
+enum {
+	GPLL_MODE_SHIFT		= 12,
+	GPLL_MODE_MASK		= 3,
+	GPLL_MODE_SLOW		= 0,
+	GPLL_MODE_NORMAL,
+	GPLL_MODE_DEEP,
+
+	CPLL_MODE_SHIFT		= 8,
+	CPLL_MODE_MASK		= 3,
+	CPLL_MODE_SLOW		= 0,
+	CPLL_MODE_NORMAL,
+	CPLL_MODE_DEEP,
+
+	DPLL_MODE_SHIFT		= 4,
+	DPLL_MODE_MASK		= 3,
+	DPLL_MODE_SLOW		= 0,
+	DPLL_MODE_NORMAL,
+	DPLL_MODE_DEEP,
+
+	APLL_MODE_SHIFT		= 0,
+	APLL_MODE_MASK		= 3,
+	APLL_MODE_SLOW		= 0,
+	APLL_MODE_NORMAL,
+	APLL_MODE_DEEP,
+};
+
+/* CRU_APLL_CON0 */
+enum {
+	CLKR_SHIFT		= 8,
+	CLKR_MASK		= 0x3f,
+
+	CLKOD_SHIFT		= 0,
+	CLKOD_MASK		= 0x3f,
+};
+
+/* CRU_APLL_CON1 */
+enum {
+	CLKF_SHIFT		= 0,
+	CLKF_MASK		= 0x1fff,
+};
+
+#endif