Add a PHY provider driver for the Samsung Exynos SoC DP PHY. Signed-off-by: Jingoo Han <jg1.han@xxxxxxxxxxx> Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> Acked-by: Felipe Balbi <balbi@xxxxxx> --- .../devicetree/bindings/phy/samsung-phy.txt | 8 ++ drivers/phy/Kconfig | 5 + drivers/phy/Makefile | 1 + drivers/phy/phy-exynos-dp-video.c | 118 ++++++++++++++++++++ 4 files changed, 132 insertions(+) create mode 100644 drivers/phy/phy-exynos-dp-video.c diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt index 5ff208c..3fb656a 100644 --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt @@ -12,3 +12,11 @@ the PHY specifier identifies the PHY and its meaning is as follows: 1 - MIPI DSIM 0, 2 - MIPI CSIS 1, 3 - MIPI DSIM 1. + +Samsung EXYNOS SoC series DP PHY +------------------------------------------------- + +Required properties: +- compatible : should be "samsung,exynos5250-dp-video-phy"; +- reg : offset and length of the DP PHY register set; +- #phy-cells : from the generic phy bindings, must be 0; \ No newline at end of file diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 6f446d0..760f55a 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -19,4 +19,9 @@ config PHY_EXYNOS_MIPI_VIDEO help Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung S5P and EXYNOS SoCs. + +config PHY_EXYNOS_DP_VIDEO + tristate "EXYNOS SoC series DP PHY driver" + help + Support for DP PHY found on Samsung EXYNOS SoCs. endif diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 71d8841..0fd1340 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o +obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o diff --git a/drivers/phy/phy-exynos-dp-video.c b/drivers/phy/phy-exynos-dp-video.c new file mode 100644 index 0000000..75e1d11 --- /dev/null +++ b/drivers/phy/phy-exynos-dp-video.c @@ -0,0 +1,118 @@ +/* + * Samsung EXYNOS SoC series DP PHY driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Author: Jingoo Han <jg1.han@xxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> + +/* DPTX_PHY_CONTROL register */ +#define EXYNOS_DPTX_PHY_ENABLE (1 << 0) + +struct exynos_dp_video_phy { + void __iomem *regs; +}; + +static int __set_phy_state(struct exynos_dp_video_phy *state, unsigned int on) +{ + void __iomem *addr; + u32 reg; + + addr = state->regs; + + reg = readl(addr); + if (on) + reg |= EXYNOS_DPTX_PHY_ENABLE; + else + reg &= ~EXYNOS_DPTX_PHY_ENABLE; + writel(reg, addr); + + return 0; +} + +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); +} + +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); +} + +static struct phy_ops exynos_dp_video_phy_ops = { + .power_on = exynos_dp_video_phy_power_on, + .power_off = exynos_dp_video_phy_power_off, + .owner = THIS_MODULE, +}; + +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; + struct phy_provider *phy_provider; + struct phy *phy; + + state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); + if (!state) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + state->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(state->regs)) + return PTR_ERR(state->regs); + + dev_set_drvdata(dev, state); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + phy = devm_phy_create(dev, 0, &exynos_dp_video_phy_ops, "dp"); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create DP PHY\n"); + return PTR_ERR(phy); + } + phy_set_drvdata(phy, state); + + return 0; +} + +#ifdef CONFIG_OF +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); +#endif + +static struct platform_driver exynos_dp_video_phy_driver = { + .probe = exynos_dp_video_phy_probe, + .driver = { + .name = "exynos-dp-video-phy", + .owner = THIS_MODULE, + .of_match_table = exynos_dp_video_phy_of_match, + } +}; +module_platform_driver(exynos_dp_video_phy_driver); + +MODULE_AUTHOR("Jingoo Han <jg1.han@xxxxxxxxxxx>"); +MODULE_DESCRIPTION("Samsung EXYNOS SoC DP PHY driver"); +MODULE_LICENSE("GPL v2"); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html