diff options
| -rw-r--r-- | Documentation/devicetree/bindings/phy/samsung-phy.txt | 7 | ||||
| -rw-r--r-- | drivers/phy/phy-exynos-dp-video.c | 79 |
2 files changed, 59 insertions, 27 deletions
diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt index 7a6feea2a48b..15e0f2c7130f 100644 --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt @@ -17,8 +17,11 @@ Samsung EXYNOS SoC series Display Port PHY ------------------------------------------------- Required properties: -- compatible : should be "samsung,exynos5250-dp-video-phy"; -- reg : offset and length of the Display Port PHY register set; +- compatible : should be one of the following supported values: + - "samsung,exynos5250-dp-video-phy" + - "samsung,exynos5420-dp-video-phy" +- samsung,pmu-syscon: phandle for PMU system controller interface, used to + control pmu registers for power isolation. - #phy-cells : from the generic PHY bindings, must be 0; Samsung S5P/EXYNOS SoC series USB PHY diff --git a/drivers/phy/phy-exynos-dp-video.c b/drivers/phy/phy-exynos-dp-video.c index 8b3026e2af7f..53f44a0fe0aa 100644 --- a/drivers/phy/phy-exynos-dp-video.c +++ b/drivers/phy/phy-exynos-dp-video.c @@ -13,44 +13,55 @@ #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/exynos5-pmu.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> +#include <linux/regmap.h> -/* DPTX_PHY_CONTROL register */ -#define EXYNOS_DPTX_PHY_ENABLE (1 << 0) +struct exynos_dp_video_phy_drvdata { + u32 phy_ctrl_offset; +}; struct exynos_dp_video_phy { - void __iomem *regs; + struct regmap *regs; + const struct exynos_dp_video_phy_drvdata *drvdata; }; -static int __set_phy_state(struct exynos_dp_video_phy *state, unsigned int on) +static void exynos_dp_video_phy_pwr_isol(struct exynos_dp_video_phy *state, + unsigned int on) { - u32 reg; + unsigned int val; + + if (IS_ERR(state->regs)) + return; - reg = readl(state->regs); - if (on) - reg |= EXYNOS_DPTX_PHY_ENABLE; - else - reg &= ~EXYNOS_DPTX_PHY_ENABLE; - writel(reg, state->regs); + val = on ? 0 : EXYNOS5_PHY_ENABLE; - return 0; + regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset, + EXYNOS5_PHY_ENABLE, val); } static int exynos_dp_video_phy_power_on(struct phy *phy) { struct exynos_dp_video_phy *state = phy_get_drvdata(phy); - return __set_phy_state(state, 1); + /* Disable power isolation on DP-PHY */ + exynos_dp_video_phy_pwr_isol(state, 0); + + return 0; } static int exynos_dp_video_phy_power_off(struct phy *phy) { struct exynos_dp_video_phy *state = phy_get_drvdata(phy); - return __set_phy_state(state, 0); + /* Enable power isolation on DP-PHY */ + exynos_dp_video_phy_pwr_isol(state, 1); + + return 0; } static struct phy_ops exynos_dp_video_phy_ops = { @@ -59,11 +70,31 @@ static struct phy_ops exynos_dp_video_phy_ops = { .owner = THIS_MODULE, }; +static const struct exynos_dp_video_phy_drvdata exynos5250_dp_video_phy = { + .phy_ctrl_offset = EXYNOS5_DPTX_PHY_CONTROL, +}; + +static const struct exynos_dp_video_phy_drvdata exynos5420_dp_video_phy = { + .phy_ctrl_offset = EXYNOS5420_DPTX_PHY_CONTROL, +}; + +static const struct of_device_id exynos_dp_video_phy_of_match[] = { + { + .compatible = "samsung,exynos5250-dp-video-phy", + .data = &exynos5250_dp_video_phy, + }, { + .compatible = "samsung,exynos5420-dp-video-phy", + .data = &exynos5420_dp_video_phy, + }, + { }, +}; +MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match); + static int exynos_dp_video_phy_probe(struct platform_device *pdev) { struct exynos_dp_video_phy *state; struct device *dev = &pdev->dev; - struct resource *res; + const struct of_device_id *match; struct phy_provider *phy_provider; struct phy *phy; @@ -71,11 +102,15 @@ static int exynos_dp_video_phy_probe(struct platform_device *pdev) if (!state) return -ENOMEM; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - state->regs = devm_ioremap_resource(dev, res); - if (IS_ERR(state->regs)) + state->regs = syscon_regmap_lookup_by_phandle(dev->of_node, + "samsung,pmu-syscon"); + if (IS_ERR(state->regs)) { + dev_err(dev, "Failed to lookup PMU regmap\n"); return PTR_ERR(state->regs); + } + + match = of_match_node(exynos_dp_video_phy_of_match, dev->of_node); + state->drvdata = match->data; phy = devm_phy_create(dev, NULL, &exynos_dp_video_phy_ops, NULL); if (IS_ERR(phy)) { @@ -89,12 +124,6 @@ static int exynos_dp_video_phy_probe(struct platform_device *pdev) return PTR_ERR_OR_ZERO(phy_provider); } -static const struct of_device_id exynos_dp_video_phy_of_match[] = { - { .compatible = "samsung,exynos5250-dp-video-phy" }, - { }, -}; -MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match); - static struct platform_driver exynos_dp_video_phy_driver = { .probe = exynos_dp_video_phy_probe, .driver = { |