<html> <head> <meta content="text/html; charset=windows-1252" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#FFFFFF"> Hi Heiko, <div class="moz-cite-prefix">On 11/12/2015 07:23 AM, Heiko Stuebner wrote: </div> <blockquote cite="mid:2368662.QeV0VQYq26@phil" type="cite"> <pre wrap="">Hi Yakir, Am Mittwoch, 28. Oktober 2015, 16:30:33 schrieb Yakir Yang: </pre> <blockquote type="cite"> <pre wrap="">Add phy driver for the Rockchip DisplayPort PHY module. This is required to get DisplayPort working in Rockchip SoCs. Reviewed-by: Heiko Stuebner <a class="moz-txt-link-rfc2396E" href="mailto:heiko@sntech.de"><heiko@sntech.de></a> Signed-off-by: Yakir Yang <a class="moz-txt-link-rfc2396E" href="mailto:ykk@rock-chips.com"><ykk@rock-chips.com></a> </pre> </blockquote> <pre wrap=""> a general thing I have been pondering, we should probably move the dp-phy under the GRF. Similar to the new power-domains being a full child of the PMU, the dp-phy is a full child-device of the GRF. That would include: - making the GRF a simply-mfd (just adding that property) - moving the dts node under it - making the driver get its regmap from its parent (just like drivers/soc/rockchip/pm_domains.c does) The usbphy is another example of that, and I think I'll be moving it below the grf as well. </pre> </blockquote> Sounds great, pretty cool to collect those <meta http-equiv="content-type" content="text/html; charset=windows-1252"> scattered "GRF" driver, if you want me do some rebase on your changes, please note me :) - Yakir <blockquote cite="mid:2368662.QeV0VQYq26@phil" type="cite"> <pre wrap=""> Heiko </pre> <blockquote type="cite"> <pre wrap="">--- Changes in v8: - Fix the mixed spacers on macro definitions. (Heiko) - Remove the unnecessary empty line after clk_prepare_enable. (Heiko) Changes in v7: - Simply the commit message. (Kishon) - Symmetrical enable/disbale the phy clock and power. (Kishon) Changes in v6: None Changes in v5: - Remove "reg" DT property, cause driver could poweron/poweroff phy via the exist "grf" syscon already. And rename the example DT node from "edp_phy: phy@ff770274" to "edp_phy: edp-phy" directly. (Heiko) - Add deivce_node at the front of driver, update phy_ops type from "static struct" to "static const struct". And correct the input paramters of devm_phy_create() interfaces. (Heiko) Changes in v4: - Add commit message, and remove the redundant rockchip_dp_phy_init() function, move those code to probe() method. And remove driver .owner number. (Kishon) Changes in v3: - Suggest, add rockchip dp phy driver, collect the phy clocks and power control. (Heiko) Changes in v2: None drivers/phy/Kconfig | 7 ++ drivers/phy/Makefile | 1 + drivers/phy/phy-rockchip-dp.c | 155 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 163 insertions(+) create mode 100644 drivers/phy/phy-rockchip-dp.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 7eb5859d..7355819 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -319,6 +319,13 @@ config PHY_ROCKCHIP_USB help Enable this to support the Rockchip USB 2.0 PHY. +config PHY_ROCKCHIP_DP + tristate "Rockchip Display Port PHY Driver" + depends on ARCH_ROCKCHIP && OF + select GENERIC_PHY + help + Enable this to support the Rockchip Display Port PHY. + config PHY_ST_SPEAR1310_MIPHY tristate "ST SPEAR1310-MIPHY driver" select GENERIC_PHY diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 075db1a..b1700cd 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -35,6 +35,7 @@ phy-exynos-usb2-$(CONFIG_PHY_S5PV210_USB2) += phy-s5pv210-usb2.o obj-$(CONFIG_PHY_EXYNOS5_USBDRD) += phy-exynos5-usbdrd.o obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o obj-$(CONFIG_PHY_ROCKCHIP_USB) += phy-rockchip-usb.o +obj-$(CONFIG_PHY_ROCKCHIP_DP) += phy-rockchip-dp.o obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY) += phy-spear1310-miphy.o obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o diff --git a/drivers/phy/phy-rockchip-dp.c b/drivers/phy/phy-rockchip-dp.c new file mode 100644 index 0000000..c82c22f --- /dev/null +++ b/drivers/phy/phy-rockchip-dp.c @@ -0,0 +1,155 @@ +/* + * Rockchip DP PHY driver + * + * Copyright (C) 2015 FuZhou Rockchip Co., Ltd. + * Author: Yakir Yang <a class="moz-txt-link-rfc2396E" href="mailto:ykk@@rock-chips.com"><ykk@@rock-chips.com></a> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License. + */ + +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/clk.h> +#include <linux/phy/phy.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> +#include <linux/platform_device.h> + +#define GRF_SOC_CON12 0x0274 + +#define GRF_EDP_REF_CLK_SEL_INTER_HIWORD_MASK BIT(4) +#define GRF_EDP_REF_CLK_SEL_INTER BIT(4) + +#define GRF_EDP_PHY_SIDDQ_HIWORD_MASK BIT(21) +#define GRF_EDP_PHY_SIDDQ_ON 0 +#define GRF_EDP_PHY_SIDDQ_OFF BIT(5) + +struct rockchip_dp_phy { + struct device *dev; + struct regmap *grf; + struct clk *phy_24m; +}; + +static int rockchip_set_phy_state(struct phy *phy, bool enable) +{ + struct rockchip_dp_phy *dp = phy_get_drvdata(phy); + int ret; + + if (enable) { + ret = regmap_write(dp->grf, GRF_SOC_CON12, + GRF_EDP_PHY_SIDDQ_HIWORD_MASK | + GRF_EDP_PHY_SIDDQ_ON); + if (ret < 0) { + dev_err(dp->dev, "Can't enable PHY power %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(dp->phy_24m); + } else { + clk_disable_unprepare(dp->phy_24m); + + ret = regmap_write(dp->grf, GRF_SOC_CON12, + GRF_EDP_PHY_SIDDQ_HIWORD_MASK | + GRF_EDP_PHY_SIDDQ_OFF); + } + + return ret; +} + +static int rockchip_dp_phy_power_on(struct phy *phy) +{ + return rockchip_set_phy_state(phy, true); +} + +static int rockchip_dp_phy_power_off(struct phy *phy) +{ + return rockchip_set_phy_state(phy, false); +} + +static const struct phy_ops rockchip_dp_phy_ops = { + .power_on = rockchip_dp_phy_power_on, + .power_off = rockchip_dp_phy_power_off, + .owner = THIS_MODULE, +}; + +static int rockchip_dp_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct phy_provider *phy_provider; + struct rockchip_dp_phy *dp; + struct resource *res; + struct phy *phy; + int ret; + + if (!np) + return -ENODEV; + + dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); + if (IS_ERR(dp)) + return -ENOMEM; + + dp->dev = dev; + + dp->phy_24m = devm_clk_get(dev, "24m"); + if (IS_ERR(dp->phy_24m)) { + dev_err(dev, "cannot get clock 24m\n"); + return PTR_ERR(dp->phy_24m); + } + + ret = clk_set_rate(dp->phy_24m, 24000000); + if (ret < 0) { + dev_err(dp->dev, "cannot set clock phy_24m %d\n", ret); + return ret; + } + + dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); + if (IS_ERR(dp->grf)) { + dev_err(dev, "rk3288-dp needs rockchip,grf property\n"); + return PTR_ERR(dp->grf); + } + + ret = regmap_write(dp->grf, GRF_SOC_CON12, GRF_EDP_REF_CLK_SEL_INTER | + GRF_EDP_REF_CLK_SEL_INTER_HIWORD_MASK); + if (ret != 0) { + dev_err(dp->dev, "Could not config GRF edp ref clk: %d\n", ret); + return ret; + } + + phy = devm_phy_create(dev, np, &rockchip_dp_phy_ops); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create phy\n"); + return PTR_ERR(phy); + } + phy_set_drvdata(phy, dp); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id rockchip_dp_phy_dt_ids[] = { + { .compatible = "rockchip,rk3288-dp-phy" }, + {} +}; + +MODULE_DEVICE_TABLE(of, rockchip_dp_phy_dt_ids); + +static struct platform_driver rockchip_dp_phy_driver = { + .probe = rockchip_dp_phy_probe, + .driver = { + .name = "rockchip-dp-phy", + .of_match_table = rockchip_dp_phy_dt_ids, + }, +}; + +module_platform_driver(rockchip_dp_phy_driver); + +MODULE_AUTHOR("Yakir Yang <a class="moz-txt-link-rfc2396E" href="mailto:ykk@rock-chips.com"><ykk@rock-chips.com></a>"); +MODULE_DESCRIPTION("Rockchip DP PHY driver"); +MODULE_LICENSE("GPL v2"); </pre> </blockquote> <pre wrap=""> </pre> </blockquote> </body> </html>