Hi, On Saturday 10 October 2015 09:25 PM, Yakir Yang wrote: > This phy driver would control the Rockchip DisplayPort module > phy clock and phy power, it is relate to analogix_dp-rockchip > dp driver. If you want DP works rightly on rockchip platform, > then you should select both of them. Add phy driver for the Rockchip DisplayPort PHY module. This is required to get DisplayPort working in Rockchip SoCs. > > Signed-off-by: Yakir Yang <ykk@xxxxxxxxxxxxxx> > --- > 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 | 151 ++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 159 insertions(+) > create mode 100644 drivers/phy/phy-rockchip-dp.c > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > index 47da573..8f2bc4f 100644 > --- a/drivers/phy/Kconfig > +++ b/drivers/phy/Kconfig > @@ -310,6 +310,13 @@ 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 a5b18c1..e281f35 100644 > --- a/drivers/phy/Makefile > +++ b/drivers/phy/Makefile > @@ -34,6 +34,7 @@ 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..3a2ac120 > --- /dev/null > +++ b/drivers/phy/phy-rockchip-dp.c > @@ -0,0 +1,151 @@ > +/* > + * Rockchip DP PHY driver > + * > + * Copyright (C) 2015 FuZhou Rockchip Co., Ltd. > + * Author: Yakir Yang <ykk@@rock-chips.com> > + * > + * 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 BIT(4) > +#define GRF_EDP_PHY_SIDDQ_WRITE_EN 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 = clk_prepare_enable(dp->phy_24m); > + if (ret < 0) { > + dev_err(dp->dev, "Can't enable clock 24m %d\n", ret); > + return ret; > + } > + > + ret = regmap_write(dp->grf, GRF_SOC_CON12, > + GRF_EDP_PHY_SIDDQ_WRITE_EN | > + GRF_EDP_PHY_SIDDQ_ON); > + } else { > + clk_disable_unprepare(dp->phy_24m); should clk_disable come after regmap_write? It'll be symmetric to enable? > + ret = regmap_write(dp->grf, GRF_SOC_CON12, > + GRF_EDP_PHY_SIDDQ_WRITE_EN | > + GRF_EDP_PHY_SIDDQ_OFF); Is this syscon register used only by Display Port PHY? Better to use regmap_update API? Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html