clk: samsung: exynos3250: Add driver for CMU_ISP clock domain

Add clock controller for CMU ISP clock domain on Exynos3250,
providing clocks for FIMC-IS subsystem.

[b.michalska: use samsung_cmu_register_one to register
the provider; updated DT binding documentation]

Signed-off-by: Tomasz Figa <[e-mail]>
Signed-off-by: Chanwoo Choi <[e-mail]>
Signed-off-by: Beata Michalska <[e-mail]>
Acked-by: Kyungmin Park <[e-mail]>
[s.nawrocki: added __init attribute which was missing in function
exynos3250_cmu_platform_init() in function, which has been]
Reported-by: kbuild test robot <[e-mail]>
Signed-off-by: Sylwester Nawrocki <[e-mail]>
Signed-off-by: Michael Turquette <[e-mail]>

Documentation/devicetree/bindings/clock/exynos3250-clock.txt

···
   - "samsung,exynos3250-cmu" - controller compatible with Exynos3250 SoC.
   - "samsung,exynos3250-cmu-dmc" - controller compatible with
     Exynos3250 SoC for Dynamic Memory Controller domain.
+  - "samsung,exynos3250-cmu-isp" - ISP block clock controller compatible
+     with Exynos3250 SOC
 
 - reg: physical base address of the controller and length of memory mapped
   region.
···
 	cmu_dmc: clock-controller@105C0000 {
 		compatible = "samsung,exynos3250-cmu-dmc";
 		reg = <0x105C0000 0x2000>;
+		#clock-cells = <1>;
+	};
+
+	cmu_isp: clock-controller@10048000 {
+		compatible = "samsung,exynos3250-cmu-isp";
+		reg = <0x10048000 0x1000>;
 		#clock-cells = <1>;
 	};
 

drivers/clk/samsung/clk-exynos3250.c

···
 }
 CLK_OF_DECLARE(exynos3250_cmu_dmc, "samsung,exynos3250-cmu-dmc",
 		exynos3250_cmu_dmc_init);
+
+
+/*
+ * CMU ISP
+ */
+
+#define DIV_ISP0		0x300
+#define DIV_ISP1		0x304
+#define GATE_IP_ISP0		0x800
+#define GATE_IP_ISP1		0x804
+#define GATE_SCLK_ISP		0x900
+
+static struct samsung_div_clock isp_div_clks[] __initdata = {
+	/*
+	 * NOTE: Following table is sorted by register address in ascending
+	 * order and then bitfield shift in descending order, as it is done
+	 * in the User's Manual. When adding new entries, please make sure
+	 * that the order is preserved, to avoid merge conflicts and make
+	 * further work with defined data easier.
+	 */
+	/* DIV_ISP0 */
+	DIV(CLK_DIV_ISP1, "div_isp1", "mout_aclk_266_sub", DIV_ISP0, 4, 3),
+	DIV(CLK_DIV_ISP0, "div_isp0", "mout_aclk_266_sub", DIV_ISP0, 0, 3),
+
+	/* DIV_ISP1 */
+	DIV(CLK_DIV_MCUISP1, "div_mcuisp1", "mout_aclk_400_mcuisp_sub",
+		DIV_ISP1, 8, 3),
+	DIV(CLK_DIV_MCUISP0, "div_mcuisp0", "mout_aclk_400_mcuisp_sub",
+		DIV_ISP1, 4, 3),
+	DIV(CLK_DIV_MPWM, "div_mpwm", "div_isp1", DIV_ISP1, 0, 3),
+};
+
+static struct samsung_gate_clock isp_gate_clks[] __initdata = {
+	/*
+	 * NOTE: Following table is sorted by register address in ascending
+	 * order and then bitfield shift in descending order, as it is done
+	 * in the User's Manual. When adding new entries, please make sure
+	 * that the order is preserved, to avoid merge conflicts and make
+	 * further work with defined data easier.
+	 */
+
+	/* GATE_IP_ISP0 */
+	GATE(CLK_UART_ISP, "uart_isp", "uart_isp_top",
+		GATE_IP_ISP0, 31, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_WDT_ISP, "wdt_isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 30, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_PWM_ISP, "pwm_isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 28, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_I2C1_ISP, "i2c1_isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 26, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_I2C0_ISP, "i2c0_isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 25, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_MPWM_ISP, "mpwm_isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 24, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_MCUCTL_ISP, "mcuctl_isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 23, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_PPMUISPX, "ppmuispx", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 21, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_PPMUISPMX, "ppmuispmx", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 20, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_QE_LITE1, "qe_lite1", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 18, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_QE_LITE0, "qe_lite0", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 17, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_QE_FD, "qe_fd", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 16, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_QE_DRC, "qe_drc", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 15, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_QE_ISP, "qe_isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 14, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_CSIS1, "csis1", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 13, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SMMU_LITE1, "smmu_lite1", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 12, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SMMU_LITE0, "smmu_lite0", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 11, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SMMU_FD, "smmu_fd", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 10, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SMMU_DRC, "smmu_drc", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 9, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SMMU_ISP, "smmu_isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 8, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_GICISP, "gicisp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 7, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_CSIS0, "csis0", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 6, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_MCUISP, "mcuisp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 5, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_LITE1, "lite1", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 4, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_LITE0, "lite0", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 3, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_FD, "fd", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 2, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_DRC, "drc", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 1, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_ISP, "isp", "mout_aclk_266_sub",
+		GATE_IP_ISP0, 0, CLK_IGNORE_UNUSED, 0),
+
+	/* GATE_IP_ISP1 */
+	GATE(CLK_QE_ISPCX, "qe_ispcx", "uart_isp_top",
+		GATE_IP_ISP0, 21, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_QE_SCALERP, "qe_scalerp", "uart_isp_top",
+		GATE_IP_ISP0, 20, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_QE_SCALERC, "qe_scalerc", "uart_isp_top",
+		GATE_IP_ISP0, 19, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SMMU_SCALERP, "smmu_scalerp", "uart_isp_top",
+		GATE_IP_ISP0, 18, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SMMU_SCALERC, "smmu_scalerc", "uart_isp_top",
+		GATE_IP_ISP0, 17, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SCALERP, "scalerp", "uart_isp_top",
+		GATE_IP_ISP0, 16, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SCALERC, "scalerc", "uart_isp_top",
+		GATE_IP_ISP0, 15, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SPI1_ISP, "spi1_isp", "uart_isp_top",
+		GATE_IP_ISP0, 13, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SPI0_ISP, "spi0_isp", "uart_isp_top",
+		GATE_IP_ISP0, 12, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_SMMU_ISPCX, "smmu_ispcx", "uart_isp_top",
+		GATE_IP_ISP0, 4, CLK_IGNORE_UNUSED, 0),
+	GATE(CLK_ASYNCAXIM, "asyncaxim", "uart_isp_top",
+		GATE_IP_ISP0, 0, CLK_IGNORE_UNUSED, 0),
+
+	/* GATE_SCLK_ISP */
+	GATE(CLK_SCLK_MPWM_ISP, "sclk_mpwm_isp", "div_mpwm",
+		GATE_SCLK_ISP, 0, CLK_IGNORE_UNUSED, 0),
+};
+
+static struct samsung_cmu_info isp_cmu_info __initdata = {
+	.div_clks	= isp_div_clks,
+	.nr_div_clks	= ARRAY_SIZE(isp_div_clks),
+	.gate_clks	= isp_gate_clks,
+	.nr_gate_clks	= ARRAY_SIZE(isp_gate_clks),
+	.nr_clk_ids	= NR_CLKS_ISP,
+};
+
+static int __init exynos3250_cmu_isp_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+
+	samsung_cmu_register_one(np, &isp_cmu_info);
+	return 0;
+}
+
+static const struct of_device_id exynos3250_cmu_isp_of_match[] = {
+	{ .compatible = "samsung,exynos3250-cmu-isp", },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver exynos3250_cmu_isp_driver = {
+	.driver = {
+		.name = "exynos3250-cmu-isp",
+		.of_match_table = exynos3250_cmu_isp_of_match,
+	},
+};
+
+static int __init exynos3250_cmu_platform_init(void)
+{
+	return platform_driver_probe(&exynos3250_cmu_isp_driver,
+					exynos3250_cmu_isp_probe);
+}
+subsys_initcall(exynos3250_cmu_platform_init);
+

include/dt-bindings/clock/exynos3250.h

···
  */
 #define NR_CLKS_DMC			21
 
+/*
+ * CMU ISP
+ */
+
+/* Dividers */
+
+#define CLK_DIV_ISP1			1
+#define CLK_DIV_ISP0			2
+#define CLK_DIV_MCUISP1			3
+#define CLK_DIV_MCUISP0			4
+#define CLK_DIV_MPWM			5
+
+/* Gates */
+
+#define CLK_UART_ISP			8
+#define CLK_WDT_ISP			9
+#define CLK_PWM_ISP			10
+#define CLK_I2C1_ISP			11
+#define CLK_I2C0_ISP			12
+#define CLK_MPWM_ISP			13
+#define CLK_MCUCTL_ISP			14
+#define CLK_PPMUISPX			15
+#define CLK_PPMUISPMX			16
+#define CLK_QE_LITE1			17
+#define CLK_QE_LITE0			18
+#define CLK_QE_FD			19
+#define CLK_QE_DRC			20
+#define CLK_QE_ISP			21
+#define CLK_CSIS1			22
+#define CLK_SMMU_LITE1			23
+#define CLK_SMMU_LITE0			24
+#define CLK_SMMU_FD			25
+#define CLK_SMMU_DRC			26
+#define CLK_SMMU_ISP			27
+#define CLK_GICISP			28
+#define CLK_CSIS0			29
+#define CLK_MCUISP			30
+#define CLK_LITE1			31
+#define CLK_LITE0			32
+#define CLK_FD				33
+#define CLK_DRC				34
+#define CLK_ISP				35
+#define CLK_QE_ISPCX			36
+#define CLK_QE_SCALERP			37
+#define CLK_QE_SCALERC			38
+#define CLK_SMMU_SCALERP		39
+#define CLK_SMMU_SCALERC		40
+#define CLK_SCALERP			41
+#define CLK_SCALERC			42
+#define CLK_SPI1_ISP			43
+#define CLK_SPI0_ISP			44
+#define CLK_SMMU_ISPCX			45
+#define CLK_ASYNCAXIM			46
+#define CLK_SCLK_MPWM_ISP		47
+
+/*
+ * Total number of clocks of CMU_ISP.
+ * NOTE: Must be equal to last clock ID increased by one.
+ */
+#define NR_CLKS_ISP			48
+
 #endif /* _DT_BINDINGS_CLOCK_SAMSUNG_EXYNOS3250_CLOCK_H */