| Message ID | 1439995877-18496-1-git-send-email-ykk@rock-chips.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Wednesday 19 August 2015 08:21 PM, Yakir Yang wrote: > Signed-off-by: Yakir Yang <ykk@rock-chips.com> where's the commit message? > --- > Changes in v3: > - Take Heiko suggest, add rockchip dp phy driver, > collect the phy clocks and power control. > > Changes in v2: None > > .../devicetree/bindings/phy/rockchip-dp-phy.txt | 26 +++ > drivers/phy/Kconfig | 7 + > drivers/phy/Makefile | 1 + > drivers/phy/phy-rockchip-dp.c | 185 +++++++++++++++++++++ > 4 files changed, 219 insertions(+) > create mode 100644 Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt > create mode 100644 drivers/phy/phy-rockchip-dp.c > > diff --git a/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt b/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt > new file mode 100644 > index 0000000..5de1088 > --- /dev/null > +++ b/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt > @@ -0,0 +1,26 @@ > +Rockchip Soc Seroes Display Port PHY > +------------------------------------ > + > +Required properties: > +- compatible : should be one of the following supported values: > + - "rockchip.rk3288-dp-phy" > + > +- reg : a list of registers used by phy driver > +- clocks: from common clock binding: handle to dp clock. > + of memory mapped region. > +- clock-names: from common clock binding: > + Required elements: "sclk_dp" "sclk_dp_24m" > + > +- rockchip,grf: this soc should set GRF regs, so need get grf here. > +- #phy-cells : from the generic PHY bindings, must be 0; > + > +Example: > + > +edp_phy: phy@ff770274 { > + compatilble = "rockchip,rk3288-dp-phy"; > + reg = <0xff770274 4>; > + rockchip,grf = <&grf>; > + clocks = <&cru SCLK_EDP_24M>; > + clock-names = "24m"; > + #phy-cells = <0>; > +} > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > index 6b8dd16..da00440 100644 > --- a/drivers/phy/Kconfig > +++ b/drivers/phy/Kconfig > @@ -297,6 +297,13 @@ 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 f344e1b..35e3ce6 100644 > --- a/drivers/phy/Makefile > +++ b/drivers/phy/Makefile > @@ -33,6 +33,7 @@ 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..4759111 > --- /dev/null > +++ b/drivers/phy/phy-rockchip-dp.c > @@ -0,0 +1,185 @@ > +/* > + * 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 DP_PHY_SIDDQ_WRITE_EN BIT(21) > +#define DP_PHY_SIDDQ_ON 0 > +#define DP_PHY_SIDDQ_OFF BIT(5) > + > +struct rockchip_dp_phy { > + struct device *dev; > + struct regmap *grf; > + void __iomem *regs; > + struct clk *phy_24m; > +}; > + > +static int rockchip_dp_phy_clk_enable(struct rockchip_dp_phy *dp) > +{ > + int ret = 0; > + > + 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; > + } > + > + ret = clk_prepare_enable(dp->phy_24m); > + if (ret < 0) { > + dev_err(dp->dev, "cannot enable clock phy_24m %d\n", ret); > + return ret; > + } > + > + return 0; > +} > + > +static int rockchip_dp_phy_clk_disable(struct rockchip_dp_phy *dp) > +{ > + clk_disable_unprepare(dp->phy_24m); > + > + return 0; > +} > + > +static int rockchip_set_phy_state(struct phy *phy, bool enable) > +{ > + struct rockchip_dp_phy *dp = phy_get_drvdata(phy); > + > + if (enable) { > + rockchip_dp_phy_clk_enable(dp); > + writel(DP_PHY_SIDDQ_WRITE_EN | DP_PHY_SIDDQ_ON, dp->regs); > + } else { > + rockchip_dp_phy_clk_disable(dp); > + writel(DP_PHY_SIDDQ_WRITE_EN | DP_PHY_SIDDQ_OFF, dp->regs); > + } > + > + return 0; > +} > + > +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 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_init(struct rockchip_dp_phy *dp) > +{ > + struct device *dev = dp->dev; > + struct device_node *np = dev->of_node; > + int ret; > + > + 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 = rockchip_dp_phy_clk_enable(dp); > + if (ret < 0) { > + dev_err(dp->dev, "cannot enable dp phy clk %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 << 16)); > + if (ret != 0) { > + dev_err(dp->dev, "Could not config GRF edp ref clk: %d\n", ret); > + return ret; > + } This function can be split to do only clk_get and syscon_regmap_lookup in probe, clk_enable and regmap_write in phy_init? > + > + return 0; > +} > + > +static int rockchip_dp_phy_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct phy_provider *phy_provider; > + struct rockchip_dp_phy *dp; > + struct resource *res; > + struct phy *phy; > + int ret; > + > + dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); > + if (IS_ERR(dp)) > + return -ENOMEM; > + > + dp->dev = dev; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + dp->regs = devm_ioremap_resource(dev, res); > + if (IS_ERR(dp->regs)) > + return PTR_ERR(dp->regs); > + > + ret = rockchip_dp_phy_init(dp); > + if (ret) > + return ret; > + > + phy = devm_phy_create(dev, NULL, &rockchip_dp_phy_ops, NULL); > + 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", > + .owner = THIS_MODULE, owner is not required here. Thanks Kishon
Hi Kishon, On 08/19/2015 11:40 PM, Kishon Vijay Abraham I wrote: > Hi, > > On Wednesday 19 August 2015 08:21 PM, Yakir Yang wrote: >> Signed-off-by: Yakir Yang <ykk@rock-chips.com> > where's the commit message? Actually I have no detail words for this, so leave this empty :-) If you think I should add some words here, I may want to declare the relationship of this driver and remote analogix dp driver. >> --- >> Changes in v3: >> - Take Heiko suggest, add rockchip dp phy driver, >> collect the phy clocks and power control. >> >> Changes in v2: None >> >> .../devicetree/bindings/phy/rockchip-dp-phy.txt | 26 +++ >> drivers/phy/Kconfig | 7 + >> drivers/phy/Makefile | 1 + >> drivers/phy/phy-rockchip-dp.c | 185 +++++++++++++++++++++ >> 4 files changed, 219 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt >> create mode 100644 drivers/phy/phy-rockchip-dp.c >> >> diff --git a/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt b/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt >> new file mode 100644 >> index 0000000..5de1088 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt >> @@ -0,0 +1,26 @@ >> +Rockchip Soc Seroes Display Port PHY >> +------------------------------------ >> + >> +Required properties: >> +- compatible : should be one of the following supported values: >> + - "rockchip.rk3288-dp-phy" >> + >> +- reg : a list of registers used by phy driver >> +- clocks: from common clock binding: handle to dp clock. >> + of memory mapped region. >> +- clock-names: from common clock binding: >> + Required elements: "sclk_dp" "sclk_dp_24m" >> + >> +- rockchip,grf: this soc should set GRF regs, so need get grf here. >> +- #phy-cells : from the generic PHY bindings, must be 0; >> + >> +Example: >> + >> +edp_phy: phy@ff770274 { >> + compatilble = "rockchip,rk3288-dp-phy"; >> + reg = <0xff770274 4>; >> + rockchip,grf = <&grf>; >> + clocks = <&cru SCLK_EDP_24M>; >> + clock-names = "24m"; >> + #phy-cells = <0>; >> +} >> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig >> index 6b8dd16..da00440 100644 >> --- a/drivers/phy/Kconfig >> +++ b/drivers/phy/Kconfig >> @@ -297,6 +297,13 @@ 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 f344e1b..35e3ce6 100644 >> --- a/drivers/phy/Makefile >> +++ b/drivers/phy/Makefile >> @@ -33,6 +33,7 @@ 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..4759111 >> --- /dev/null >> +++ b/drivers/phy/phy-rockchip-dp.c >> @@ -0,0 +1,185 @@ >> +/* >> + * 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 DP_PHY_SIDDQ_WRITE_EN BIT(21) >> +#define DP_PHY_SIDDQ_ON 0 >> +#define DP_PHY_SIDDQ_OFF BIT(5) >> + >> +struct rockchip_dp_phy { >> + struct device *dev; >> + struct regmap *grf; >> + void __iomem *regs; >> + struct clk *phy_24m; >> +}; >> + >> +static int rockchip_dp_phy_clk_enable(struct rockchip_dp_phy *dp) >> +{ >> + int ret = 0; >> + >> + 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; >> + } >> + >> + ret = clk_prepare_enable(dp->phy_24m); >> + if (ret < 0) { >> + dev_err(dp->dev, "cannot enable clock phy_24m %d\n", ret); >> + return ret; >> + } >> + >> + return 0; >> +} >> + >> +static int rockchip_dp_phy_clk_disable(struct rockchip_dp_phy *dp) >> +{ >> + clk_disable_unprepare(dp->phy_24m); >> + >> + return 0; >> +} >> + >> +static int rockchip_set_phy_state(struct phy *phy, bool enable) >> +{ >> + struct rockchip_dp_phy *dp = phy_get_drvdata(phy); >> + >> + if (enable) { >> + rockchip_dp_phy_clk_enable(dp); >> + writel(DP_PHY_SIDDQ_WRITE_EN | DP_PHY_SIDDQ_ON, dp->regs); >> + } else { >> + rockchip_dp_phy_clk_disable(dp); >> + writel(DP_PHY_SIDDQ_WRITE_EN | DP_PHY_SIDDQ_OFF, dp->regs); >> + } >> + >> + return 0; >> +} >> + >> +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 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_init(struct rockchip_dp_phy *dp) >> +{ >> + struct device *dev = dp->dev; >> + struct device_node *np = dev->of_node; >> + int ret; >> + >> + 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 = rockchip_dp_phy_clk_enable(dp); >> + if (ret < 0) { >> + dev_err(dp->dev, "cannot enable dp phy clk %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 << 16)); >> + if (ret != 0) { >> + dev_err(dp->dev, "Could not config GRF edp ref clk: %d\n", ret); >> + return ret; >> + } > This function can be split to do only clk_get and syscon_regmap_lookup in > probe, clk_enable and regmap_write in phy_init? Yeah, I agree with you to move DT property code to probe function, and I do find a bug that clk_enable should be remove from probe/phy_init function. If clock have been enabled in probe function, then the reference count of this clock would never reach zero, cause phy_power_on always corresponding to phy_power_off. So phy_init function would only have one expression regmap_write, it's redundant, let's just delete phy_init function, move all code to probe. Thanks, - Yakir ------------------------------------------------------------------------------------------------ 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; @@ -146,15 +112,31 @@ static int rockchip_dp_phy_probe(struct platform_device *pdev) if (IS_ERR(dp->regs)) return PTR_ERR(dp->regs); - ret = rockchip_dp_phy_init(dp); - if (ret) + 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); + } + + 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 << 16)); + if (ret) { + dev_err(dp->dev, "Could not config GRF edp ref clk: %d\n", ret); return ret; + } phy = devm_phy_create(dev, NULL, &rockchip_dp_phy_ops, NULL); if (IS_ERR(phy)) { dev_err(dev, "failed to create phy\n"); return PTR_ERR(phy); } >> + >> + return 0; >> +} >> + >> +static int rockchip_dp_phy_probe(struct platform_device *pdev) >> +{ >> + struct device *dev = &pdev->dev; >> + struct phy_provider *phy_provider; >> + struct rockchip_dp_phy *dp; >> + struct resource *res; >> + struct phy *phy; >> + int ret; >> + >> + dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); >> + if (IS_ERR(dp)) >> + return -ENOMEM; >> + >> + dp->dev = dev; >> + >> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> + dp->regs = devm_ioremap_resource(dev, res); >> + if (IS_ERR(dp->regs)) >> + return PTR_ERR(dp->regs); >> + >> + ret = rockchip_dp_phy_init(dp); >> + if (ret) >> + return ret; >> + >> + phy = devm_phy_create(dev, NULL, &rockchip_dp_phy_ops, NULL); >> + 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", >> + .owner = THIS_MODULE, > owner is not required here. > > Thanks > Kishon > > >
Hi Kishon, On 08/20/2015 01:56 AM, Yakir Yang wrote: > Hi Kishon, > > On 08/19/2015 11:40 PM, Kishon Vijay Abraham I wrote: > [...] >>> [...] >>> +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", >>> + .owner = THIS_MODULE, >> owner is not required here. Whoops, forget to reply this one. Done. - Yakir >> >> Thanks >> Kishon >> >> >> >
diff --git a/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt b/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt new file mode 100644 index 0000000..5de1088 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt @@ -0,0 +1,26 @@ +Rockchip Soc Seroes Display Port PHY +------------------------------------ + +Required properties: +- compatible : should be one of the following supported values: + - "rockchip.rk3288-dp-phy" + +- reg : a list of registers used by phy driver +- clocks: from common clock binding: handle to dp clock. + of memory mapped region. +- clock-names: from common clock binding: + Required elements: "sclk_dp" "sclk_dp_24m" + +- rockchip,grf: this soc should set GRF regs, so need get grf here. +- #phy-cells : from the generic PHY bindings, must be 0; + +Example: + +edp_phy: phy@ff770274 { + compatilble = "rockchip,rk3288-dp-phy"; + reg = <0xff770274 4>; + rockchip,grf = <&grf>; + clocks = <&cru SCLK_EDP_24M>; + clock-names = "24m"; + #phy-cells = <0>; +} diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 6b8dd16..da00440 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -297,6 +297,13 @@ 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 f344e1b..35e3ce6 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -33,6 +33,7 @@ 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..4759111 --- /dev/null +++ b/drivers/phy/phy-rockchip-dp.c @@ -0,0 +1,185 @@ +/* + * 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 DP_PHY_SIDDQ_WRITE_EN BIT(21) +#define DP_PHY_SIDDQ_ON 0 +#define DP_PHY_SIDDQ_OFF BIT(5) + +struct rockchip_dp_phy { + struct device *dev; + struct regmap *grf; + void __iomem *regs; + struct clk *phy_24m; +}; + +static int rockchip_dp_phy_clk_enable(struct rockchip_dp_phy *dp) +{ + int ret = 0; + + 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; + } + + ret = clk_prepare_enable(dp->phy_24m); + if (ret < 0) { + dev_err(dp->dev, "cannot enable clock phy_24m %d\n", ret); + return ret; + } + + return 0; +} + +static int rockchip_dp_phy_clk_disable(struct rockchip_dp_phy *dp) +{ + clk_disable_unprepare(dp->phy_24m); + + return 0; +} + +static int rockchip_set_phy_state(struct phy *phy, bool enable) +{ + struct rockchip_dp_phy *dp = phy_get_drvdata(phy); + + if (enable) { + rockchip_dp_phy_clk_enable(dp); + writel(DP_PHY_SIDDQ_WRITE_EN | DP_PHY_SIDDQ_ON, dp->regs); + } else { + rockchip_dp_phy_clk_disable(dp); + writel(DP_PHY_SIDDQ_WRITE_EN | DP_PHY_SIDDQ_OFF, dp->regs); + } + + return 0; +} + +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 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_init(struct rockchip_dp_phy *dp) +{ + struct device *dev = dp->dev; + struct device_node *np = dev->of_node; + int ret; + + 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 = rockchip_dp_phy_clk_enable(dp); + if (ret < 0) { + dev_err(dp->dev, "cannot enable dp phy clk %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 << 16)); + if (ret != 0) { + dev_err(dp->dev, "Could not config GRF edp ref clk: %d\n", ret); + return ret; + } + + return 0; +} + +static int rockchip_dp_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct phy_provider *phy_provider; + struct rockchip_dp_phy *dp; + struct resource *res; + struct phy *phy; + int ret; + + dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); + if (IS_ERR(dp)) + return -ENOMEM; + + dp->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + dp->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(dp->regs)) + return PTR_ERR(dp->regs); + + ret = rockchip_dp_phy_init(dp); + if (ret) + return ret; + + phy = devm_phy_create(dev, NULL, &rockchip_dp_phy_ops, NULL); + 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", + .owner = THIS_MODULE, + .of_match_table = rockchip_dp_phy_dt_ids, + }, +}; + +module_platform_driver(rockchip_dp_phy_driver); + +MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>"); +MODULE_DESCRIPTION("Rockchip DP PHY driver"); +MODULE_LICENSE("GPL v2");
Signed-off-by: Yakir Yang <ykk@rock-chips.com> --- Changes in v3: - Take Heiko suggest, add rockchip dp phy driver, collect the phy clocks and power control. Changes in v2: None .../devicetree/bindings/phy/rockchip-dp-phy.txt | 26 +++ drivers/phy/Kconfig | 7 + drivers/phy/Makefile | 1 + drivers/phy/phy-rockchip-dp.c | 185 +++++++++++++++++++++ 4 files changed, 219 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt create mode 100644 drivers/phy/phy-rockchip-dp.c