| Message ID | 1446021033-11537-1-git-send-email-ykk@rock-chips.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Yakir, Am Mittwoch, 28. Oktober 2015, 16:30:33 schrieb Yakir Yang: > +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; drivers/phy/phy-rockchip-dp.c: In function 'rockchip_dp_phy_probe': drivers/phy/phy-rockchip-dp.c:86:19: warning: unused variable 'res' [-Wunused-variable] > + 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; > + } > +
Hi Heiko, On 10/29/2015 04:36 AM, Heiko Stuebner wrote: > Hi Yakir, > > Am Mittwoch, 28. Oktober 2015, 16:30:33 schrieb Yakir Yang: >> +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; > drivers/phy/phy-rockchip-dp.c: In function 'rockchip_dp_phy_probe': > drivers/phy/phy-rockchip-dp.c:86:19: warning: unused variable 'res' [-Wunused-variable] Oh, thanks, would send v9 of this one alone. - Yakir >> + 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; >> + } >> + > > >
Hi Yakir, Am Mittwoch, 28. Oktober 2015, 16:30:33 schrieb Yakir Yang: > Add phy driver for the Rockchip DisplayPort PHY module. This > is required to get DisplayPort working in Rockchip SoCs. > > Reviewed-by: Heiko Stuebner <heiko@sntech.de> > Signed-off-by: Yakir Yang <ykk@rock-chips.com> 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. Heiko > --- > 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 <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_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 <ykk@rock-chips.com>"); > +MODULE_DESCRIPTION("Rockchip DP PHY driver"); > +MODULE_LICENSE("GPL v2"); >
Hi Heiko, On 11/12/2015 07:23 AM, Heiko Stuebner wrote: > Hi Yakir, > > Am Mittwoch, 28. Oktober 2015, 16:30:33 schrieb Yakir Yang: >> Add phy driver for the Rockchip DisplayPort PHY module. This >> is required to get DisplayPort working in Rockchip SoCs. >> >> Reviewed-by: Heiko Stuebner <heiko@sntech.de> >> Signed-off-by: Yakir Yang <ykk@rock-chips.com> > 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. Sounds great, pretty cool to collect those scattered "GRF" driver, if you want me do some rebase on your changes, please note me :) - Yakir > > Heiko > >> --- >> 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 <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_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 <ykk@rock-chips.com>"); >> +MODULE_DESCRIPTION("Rockchip DP PHY driver"); >> +MODULE_LICENSE("GPL v2"); >> > > >
Hi Yakir, Am Donnerstag, 12. November 2015, 10:36:51 schrieb Yakir Yang: > On 11/12/2015 07:23 AM, Heiko Stuebner wrote: > > Am Mittwoch, 28. Oktober 2015, 16:30:33 schrieb Yakir Yang: > >> Add phy driver for the Rockchip DisplayPort PHY module. This > >> is required to get DisplayPort working in Rockchip SoCs. > >> > >> Reviewed-by: Heiko Stuebner <heiko@sntech.de> > >> Signed-off-by: Yakir Yang <ykk@rock-chips.com> > > 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. > > Sounds great, pretty cool to collect those scattered "GRF" driver, > if you want me do some rebase on your changes, please note me :) nope, that won't be necessary ... I'm currently doing some usbphy reorganization/cleanups for 4.5 first, so to keep conflicts down I'll do the move probably for 4.6. As I expect your edp series to make it into 4.5 we'll also not have conflicts here then :-) Heiko
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 <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_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 <ykk@rock-chips.com>"); +MODULE_DESCRIPTION("Rockchip DP PHY driver"); +MODULE_LICENSE("GPL v2");