clk: samsung: exynos850: Implement CMU_CMGP domain

CMU_CMGP clock domain provides clocks for CMGP IP-core (Common GPIO).
CMGP module encapsulates next blocks:
  - 8 GPIO lines
  - 1 GPADC
  - 2 USI blocks, each can be configured to provide one of
    UART/SPI/HSI2C serial interfaces

Signed-off-by: Sam Protsenko <[email protected]>
Signed-off-by: Sylwester Nawrocki <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Sam Protsenko

drivers/clk/samsung/clk-exynos850.c

@@ -492,6 +492,103 @@ static const struct samsung_cmu_info apm_cmu_info __initconst = {
 	.clk_name		= "dout_clkcmu_apm_bus",
 };
 
+/* ---- CMU_CMGP ------------------------------------------------------------ */
+
+/* Register Offset definitions for CMU_CMGP (0x11c00000) */
+#define CLK_CON_MUX_CLK_CMGP_ADC		0x1000
+#define CLK_CON_MUX_MUX_CLK_CMGP_USI_CMGP0	0x1004
+#define CLK_CON_MUX_MUX_CLK_CMGP_USI_CMGP1	0x1008
+#define CLK_CON_DIV_DIV_CLK_CMGP_ADC		0x1800
+#define CLK_CON_DIV_DIV_CLK_CMGP_USI_CMGP0	0x1804
+#define CLK_CON_DIV_DIV_CLK_CMGP_USI_CMGP1	0x1808
+#define CLK_CON_GAT_GOUT_CMGP_ADC_PCLK_S0	0x200c
+#define CLK_CON_GAT_GOUT_CMGP_ADC_PCLK_S1	0x2010
+#define CLK_CON_GAT_GOUT_CMGP_GPIO_PCLK		0x2018
+#define CLK_CON_GAT_GOUT_CMGP_USI_CMGP0_IPCLK	0x2044
+#define CLK_CON_GAT_GOUT_CMGP_USI_CMGP0_PCLK	0x2048
+#define CLK_CON_GAT_GOUT_CMGP_USI_CMGP1_IPCLK	0x204c
+#define CLK_CON_GAT_GOUT_CMGP_USI_CMGP1_PCLK	0x2050
+
+static const unsigned long cmgp_clk_regs[] __initconst = {
+	CLK_CON_MUX_CLK_CMGP_ADC,
+	CLK_CON_MUX_MUX_CLK_CMGP_USI_CMGP0,
+	CLK_CON_MUX_MUX_CLK_CMGP_USI_CMGP1,
+	CLK_CON_DIV_DIV_CLK_CMGP_ADC,
+	CLK_CON_DIV_DIV_CLK_CMGP_USI_CMGP0,
+	CLK_CON_DIV_DIV_CLK_CMGP_USI_CMGP1,
+	CLK_CON_GAT_GOUT_CMGP_ADC_PCLK_S0,
+	CLK_CON_GAT_GOUT_CMGP_ADC_PCLK_S1,
+	CLK_CON_GAT_GOUT_CMGP_GPIO_PCLK,
+	CLK_CON_GAT_GOUT_CMGP_USI_CMGP0_IPCLK,
+	CLK_CON_GAT_GOUT_CMGP_USI_CMGP0_PCLK,
+	CLK_CON_GAT_GOUT_CMGP_USI_CMGP1_IPCLK,
+	CLK_CON_GAT_GOUT_CMGP_USI_CMGP1_PCLK,
+};
+
+/* List of parent clocks for Muxes in CMU_CMGP */
+PNAME(mout_cmgp_usi0_p)	= { "clk_rco_cmgp", "gout_clkcmu_cmgp_bus" };
+PNAME(mout_cmgp_usi1_p)	= { "clk_rco_cmgp", "gout_clkcmu_cmgp_bus" };
+PNAME(mout_cmgp_adc_p)	= { "oscclk", "dout_cmgp_adc" };
+
+static const struct samsung_fixed_rate_clock cmgp_fixed_clks[] __initconst = {
+	FRATE(CLK_RCO_CMGP, "clk_rco_cmgp", NULL, 0, 49152000),
+};
+
+static const struct samsung_mux_clock cmgp_mux_clks[] __initconst = {
+	MUX(CLK_MOUT_CMGP_ADC, "mout_cmgp_adc", mout_cmgp_adc_p,
+	    CLK_CON_MUX_CLK_CMGP_ADC, 0, 1),
+	MUX(CLK_MOUT_CMGP_USI0, "mout_cmgp_usi0", mout_cmgp_usi0_p,
+	    CLK_CON_MUX_MUX_CLK_CMGP_USI_CMGP0, 0, 1),
+	MUX(CLK_MOUT_CMGP_USI1, "mout_cmgp_usi1", mout_cmgp_usi1_p,
+	    CLK_CON_MUX_MUX_CLK_CMGP_USI_CMGP1, 0, 1),
+};
+
+static const struct samsung_div_clock cmgp_div_clks[] __initconst = {
+	DIV(CLK_DOUT_CMGP_ADC, "dout_cmgp_adc", "gout_clkcmu_cmgp_bus",
+	    CLK_CON_DIV_DIV_CLK_CMGP_ADC, 0, 4),
+	DIV(CLK_DOUT_CMGP_USI0, "dout_cmgp_usi0", "mout_cmgp_usi0",
+	    CLK_CON_DIV_DIV_CLK_CMGP_USI_CMGP0, 0, 5),
+	DIV(CLK_DOUT_CMGP_USI1, "dout_cmgp_usi1", "mout_cmgp_usi1",
+	    CLK_CON_DIV_DIV_CLK_CMGP_USI_CMGP1, 0, 5),
+};
+
+static const struct samsung_gate_clock cmgp_gate_clks[] __initconst = {
+	GATE(CLK_GOUT_CMGP_ADC_S0_PCLK, "gout_adc_s0_pclk",
+	     "gout_clkcmu_cmgp_bus",
+	     CLK_CON_GAT_GOUT_CMGP_ADC_PCLK_S0, 21, 0, 0),
+	GATE(CLK_GOUT_CMGP_ADC_S1_PCLK, "gout_adc_s1_pclk",
+	     "gout_clkcmu_cmgp_bus",
+	     CLK_CON_GAT_GOUT_CMGP_ADC_PCLK_S1, 21, 0, 0),
+	GATE(CLK_GOUT_CMGP_GPIO_PCLK, "gout_gpio_cmgp_pclk",
+	     "gout_clkcmu_cmgp_bus",
+	     CLK_CON_GAT_GOUT_CMGP_GPIO_PCLK, 21, 0, 0),
+	GATE(CLK_GOUT_CMGP_USI0_IPCLK, "gout_cmgp_usi0_ipclk", "dout_cmgp_usi0",
+	     CLK_CON_GAT_GOUT_CMGP_USI_CMGP0_IPCLK, 21, 0, 0),
+	GATE(CLK_GOUT_CMGP_USI0_PCLK, "gout_cmgp_usi0_pclk",
+	     "gout_clkcmu_cmgp_bus",
+	     CLK_CON_GAT_GOUT_CMGP_USI_CMGP0_PCLK, 21, 0, 0),
+	GATE(CLK_GOUT_CMGP_USI1_IPCLK, "gout_cmgp_usi1_ipclk", "dout_cmgp_usi1",
+	     CLK_CON_GAT_GOUT_CMGP_USI_CMGP1_IPCLK, 21, 0, 0),
+	GATE(CLK_GOUT_CMGP_USI1_PCLK, "gout_cmgp_usi1_pclk",
+	     "gout_clkcmu_cmgp_bus",
+	     CLK_CON_GAT_GOUT_CMGP_USI_CMGP1_PCLK, 21, 0, 0),
+};
+
+static const struct samsung_cmu_info cmgp_cmu_info __initconst = {
+	.mux_clks		= cmgp_mux_clks,
+	.nr_mux_clks		= ARRAY_SIZE(cmgp_mux_clks),
+	.div_clks		= cmgp_div_clks,
+	.nr_div_clks		= ARRAY_SIZE(cmgp_div_clks),
+	.gate_clks		= cmgp_gate_clks,
+	.nr_gate_clks		= ARRAY_SIZE(cmgp_gate_clks),
+	.fixed_clks		= cmgp_fixed_clks,
+	.nr_fixed_clks		= ARRAY_SIZE(cmgp_fixed_clks),
+	.nr_clk_ids		= CMGP_NR_CLK,
+	.clk_regs		= cmgp_clk_regs,
+	.nr_clk_regs		= ARRAY_SIZE(cmgp_clk_regs),
+	.clk_name		= "gout_clkcmu_cmgp_bus",
+};
+
 /* ---- CMU_HSI ------------------------------------------------------------- */
 
 /* Register Offset definitions for CMU_HSI (0x13400000) */
@@ -943,6 +1040,9 @@ static const struct of_device_id exynos850_cmu_of_match[] = {
 	{
 		.compatible = "samsung,exynos850-cmu-apm",
 		.data = &apm_cmu_info,
+	}, {
+		.compatible = "samsung,exynos850-cmu-cmgp",
+		.data = &cmgp_cmu_info,
 	}, {
 		.compatible = "samsung,exynos850-cmu-hsi",
 		.data = &hsi_cmu_info,