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Subject[PATCH v3 8/9] clk: actions: Add Actions Semi S700 SoC Reset Management Unit support
Date
Add Reset Management Unit (RMU) support for Actions Semi S700 SoC.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/clk/actions/owl-s700.c | 51 ++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)

diff --git a/drivers/clk/actions/owl-s700.c b/drivers/clk/actions/owl-s700.c
index e7cacd677275..a2f34d13fb54 100644
--- a/drivers/clk/actions/owl-s700.c
+++ b/drivers/clk/actions/owl-s700.c
@@ -20,8 +20,10 @@
#include "owl-gate.h"
#include "owl-mux.h"
#include "owl-pll.h"
+#include "owl-reset.h"

#include <dt-bindings/clock/actions,s700-cmu.h>
+#include <dt-bindings/reset/actions,s700-reset.h>

#define CMU_COREPLL (0x0000)
#define CMU_DEVPLL (0x0004)
@@ -569,20 +571,69 @@ static struct clk_hw_onecell_data s700_hw_clks = {
.num = CLK_NR_CLKS,
};

+static const struct owl_reset_map s700_resets[] = {
+ [RESET_DE] = { CMU_DEVRST0, BIT(0) },
+ [RESET_LCD0] = { CMU_DEVRST0, BIT(1) },
+ [RESET_DSI] = { CMU_DEVRST0, BIT(2) },
+ [RESET_CSI] = { CMU_DEVRST0, BIT(13) },
+ [RESET_SI] = { CMU_DEVRST0, BIT(14) },
+ [RESET_I2C0] = { CMU_DEVRST1, BIT(0) },
+ [RESET_I2C1] = { CMU_DEVRST1, BIT(1) },
+ [RESET_I2C2] = { CMU_DEVRST1, BIT(2) },
+ [RESET_I2C3] = { CMU_DEVRST1, BIT(3) },
+ [RESET_SPI0] = { CMU_DEVRST1, BIT(4) },
+ [RESET_SPI1] = { CMU_DEVRST1, BIT(5) },
+ [RESET_SPI2] = { CMU_DEVRST1, BIT(6) },
+ [RESET_SPI3] = { CMU_DEVRST1, BIT(7) },
+ [RESET_UART0] = { CMU_DEVRST1, BIT(8) },
+ [RESET_UART1] = { CMU_DEVRST1, BIT(9) },
+ [RESET_UART2] = { CMU_DEVRST1, BIT(10) },
+ [RESET_UART3] = { CMU_DEVRST1, BIT(11) },
+ [RESET_UART4] = { CMU_DEVRST1, BIT(12) },
+ [RESET_UART5] = { CMU_DEVRST1, BIT(13) },
+ [RESET_UART6] = { CMU_DEVRST1, BIT(14) },
+ [RESET_KEY] = { CMU_DEVRST1, BIT(24) },
+ [RESET_GPIO] = { CMU_DEVRST1, BIT(25) },
+ [RESET_AUDIO] = { CMU_DEVRST1, BIT(29) },
+};
+
static struct owl_clk_desc s700_clk_desc = {
.clks = s700_clks,
.num_clks = ARRAY_SIZE(s700_clks),

.hw_clks = &s700_hw_clks,
+
+ .resets = s700_resets,
+ .num_resets = ARRAY_SIZE(s700_resets),
};

static int s700_clk_probe(struct platform_device *pdev)
{
struct owl_clk_desc *desc;
+ struct owl_reset *reset;
+ int ret;

desc = &s700_clk_desc;
owl_clk_regmap_init(pdev, desc);

+ /*
+ * FIXME: Reset controller registration should be moved to
+ * common code, once all SoCs of Owl family supports it.
+ */
+ reset = devm_kzalloc(&pdev->dev, sizeof(*reset), GFP_KERNEL);
+ if (!reset)
+ return -ENOMEM;
+
+ reset->rcdev.of_node = pdev->dev.of_node;
+ reset->rcdev.ops = &owl_reset_ops;
+ reset->rcdev.nr_resets = desc->num_resets;
+ reset->reset_map = desc->resets;
+ reset->regmap = desc->regmap;
+
+ ret = devm_reset_controller_register(&pdev->dev, &reset->rcdev);
+ if (ret)
+ dev_err(&pdev->dev, "Failed to register reset controller\n");
+
return owl_clk_probe(&pdev->dev, desc->hw_clks);
}

--
2.17.1
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