[PATCH] clk: samsung: exynos3250: Add driver for CMU_ISP clock domain
From: Beata Michalska
Date: Thu Feb 05 2015 - 06:14:37 EST
From: Tomasz Figa <t.figa@xxxxxxxxxxx>
Add clock controller for CMU ISP clock domain on Exynos3250,
providing clocks for FIMC-IS subsystem.
[b.michalska: initial setup of ISP block source clocks
(setting root oscillator clock as the input);
use samsung_cmu_register_one to register the provider;
updated DT binding documentation]
Signed-off-by: Tomasz Figa <t.figa@xxxxxxxxxxx>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
Signed-off-by: Beata Michalska <b.michalska@xxxxxxxxxxx>
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
.../devicetree/bindings/clock/exynos3250-clock.txt | 8 +
drivers/clk/samsung/clk-exynos3250.c | 189 ++++++++++++++++++++
include/dt-bindings/clock/exynos3250.h | 61 +++++++
3 files changed, 258 insertions(+)
diff --git a/Documentation/devicetree/bindings/clock/exynos3250-clock.txt b/Documentation/devicetree/bindings/clock/exynos3250-clock.txt
index f57d9dd..f1738b8 100644
--- a/Documentation/devicetree/bindings/clock/exynos3250-clock.txt
+++ b/Documentation/devicetree/bindings/clock/exynos3250-clock.txt
@@ -9,6 +9,8 @@ Required Properties:
- "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.
@@ -36,6 +38,12 @@ Example 1: Examples of clock controller nodes are listed below.
#clock-cells = <1>;
};
+ cmu_isp: clock-controller@10048000 {
+ compatible = "samsung,exynos3250-cmu-isp";
+ reg = <0x10048000 0x1000>;
+ #clock-cells = <1>;
+ };
+
Example 2: UART controller node that consumes the clock generated by the clock
controller. Refer to the standard clock bindings for information
about 'clocks' and 'clock-names' property.
diff --git a/drivers/clk/samsung/clk-exynos3250.c b/drivers/clk/samsung/clk-exynos3250.c
index 6e6cca3..36dceb6 100644
--- a/drivers/clk/samsung/clk-exynos3250.c
+++ b/drivers/clk/samsung/clk-exynos3250.c
@@ -814,9 +814,16 @@ static void __init exynos3_core_down_clock(void)
__raw_writel(0x0, reg_base + PWR_CTRL2);
}
+static inline struct clk *__samsung_clk_get(struct samsung_clk_provider *ctx,
+ unsigned int idx)
+{
+ return ctx->clk_data.clks[idx];
+}
+
static void __init exynos3250_cmu_init(struct device_node *np)
{
struct samsung_clk_provider *ctx;
+ struct clk* clk_mux, *clk_parent;
reg_base = of_iomap(np, 0);
if (!reg_base)
@@ -841,6 +848,27 @@ static void __init exynos3250_cmu_init(struct device_node *np)
samsung_clk_register_div(ctx, div_clks, ARRAY_SIZE(div_clks));
samsung_clk_register_gate(ctx, gate_clks, ARRAY_SIZE(gate_clks));
+ /**
+ * Both mux clocks: mout_aclk_400_mcuisp_sub and mout_aclk_266_sub
+ * drive the source clocks for ISP block (MCUISP and ISP respectively).
+ * Switch both muxes to root oscillator clock to secure
+ * proper power down of ISP power domain case it's state
+ * transitions remain unhandled (by a relevant device driver).
+ * This will also reduce the risk of accessing the ISP CMU registers
+ * while the ISP power domain remains turned off.
+ * Note: This still requires some real solutions (involving
+ * the ISP CMU)
+ */
+ clk_parent = __samsung_clk_get(ctx, CLK_FIN_PLL);
+ if (!IS_ERR(clk_parent)) {
+ clk_mux = __samsung_clk_get(ctx, CLK_MOUT_ACLK_400_MCUISP_SUB);
+ if (!IS_ERR(clk_mux))
+ clk_set_parent(clk_mux, clk_parent);
+ clk_mux = __samsung_clk_get(ctx, CLK_MOUT_ACLK_266_SUB);
+ if (!IS_ERR(clk_mux))
+ clk_set_parent(clk_mux, clk_parent);
+ }
+
exynos3_core_down_clock();
exynos3250_clk_sleep_init();
@@ -1017,3 +1045,164 @@ static void __init exynos3250_cmu_dmc_init(struct device_node *np)
}
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 exynos3250_cmu_platform_init(void)
+{
+ return platform_driver_probe(&exynos3250_cmu_isp_driver,
+ exynos3250_cmu_isp_probe);
+}
+subsys_initcall(exynos3250_cmu_platform_init);
diff --git a/include/dt-bindings/clock/exynos3250.h b/include/dt-bindings/clock/exynos3250.h
index 961b9c1..aab088d 100644
--- a/include/dt-bindings/clock/exynos3250.h
+++ b/include/dt-bindings/clock/exynos3250.h
@@ -282,4 +282,65 @@
*/
#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 */
--
1.7.9.5
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