Hi Kishon, > From: Kishon Vijay Abraham I [mailto:kishon@xxxxxx] > Sent: Monday, November 04, 2013 7:55 AM > > Hi Vivek, > > On Thursday 31 October 2013 01:15 PM, Vivek Gautam wrote: > > Add a new driver for the USB 3.0 PHY on Exynos5 series of SoCs. > > The new driver uses the generic PHY framework and will interact with > > DWC3 controller present on Exynos5 series of SoCs. > > In Exynos, you have a single IP that supports both USB3 and USB2 PHY > right? I think that needs to be mentioned here. As far as I know the IP is different. > Do you have separate registers that should be used for > initializing/powerin_on/powering_off etc.. for usb2 phy and usb3 phy? > If so, then you should model this driver as a single driver that > supports two PHYs similar to what Sylwester has done before? Best wishes, Kamil > Cheers > Kishon > > > > > Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx> > > --- > > .../devicetree/bindings/phy/samsung-phy.txt | 20 + > > drivers/phy/Kconfig | 7 + > > drivers/phy/Makefile | 1 + > > drivers/phy/phy-exynos5-usb3.c | 562 > ++++++++++++++++++++ > > 4 files changed, 590 insertions(+), 0 deletions(-) > > create mode 100644 drivers/phy/phy-exynos5-usb3.c > > > > diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt > > b/Documentation/devicetree/bindings/phy/samsung-phy.txt > > index c0fccaa..9b5c111 100644 > > --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt > > +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt > > @@ -20,3 +20,23 @@ Required properties: > > - compatible : should be "samsung,exynos5250-dp-video-phy"; > > - reg : offset and length of the Display Port PHY register set; > > - #phy-cells : from the generic PHY bindings, must be 0; > > + > > +Samsung Exynos5 SoC seiries USB 3.0 PHY controller > > +-------------------------------------------------- > > + > > +Required properties: > > +- compatible : > > + should be "samsung,exynos5250-usb3phy" for exynos5250 SoC > > + should be "samsung,exynos5420-usb3phy" for exynos5420 SoC > > +- reg : Register offset and length array > > + - first field corresponds to USB 3.0 PHY register set; > > + - second field corresponds to PHY power isolation register > > + present in PMU; > > +- clocks: Clock IDs array as required by the controller > > +- clock-names: names of clocks correseponding to IDs in the clock > property; > > + Required clocks: > > + - first clock is main PHY clock (same as USB 3.0 controller IP > clock) > > + - second clock is reference clock (usually crystal clock) > > + optional clock: > > + - third clock is special clock used by PHY for operation > > +- #phy-cells : from the generic PHY bindings, must be 0; > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index > > a344f3d..9a100c6 100644 > > --- a/drivers/phy/Kconfig > > +++ b/drivers/phy/Kconfig > > @@ -51,4 +51,11 @@ config PHY_EXYNOS_DP_VIDEO > > help > > Support for Display Port PHY found on Samsung EXYNOS SoCs. > > > > +config PHY_EXYNOS5_USB3 > > + tristate "Exynos5 SoC series USB 3.0 PHY driver" > > + depends on ARCH_EXYNOS5 > > + select GENERIC_PHY > > + help > > + Enable USB 3.0 PHY support for Exynos 5 SoC series > > + > > endmenu > > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index > > d0caae9..9c06a61 100644 > > --- a/drivers/phy/Makefile > > +++ b/drivers/phy/Makefile > > @@ -7,3 +7,4 @@ obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp- > video.o > > obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o > > obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o > > obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o > > +obj-$(CONFIG_PHY_EXYNOS5_USB3) += phy-exynos5-usb3.o > > diff --git a/drivers/phy/phy-exynos5-usb3.c > > b/drivers/phy/phy-exynos5-usb3.c new file mode 100644 index > > 0000000..b9a2674 > > --- /dev/null > > +++ b/drivers/phy/phy-exynos5-usb3.c > > @@ -0,0 +1,562 @@ > > +/* > > + * Samsung EXYNOS5 SoC series USB 3.0 PHY driver > > + * > > + * Copyright (C) 2013 Samsung Electronics Co., Ltd. > > + * Author: Vivek Gautam <gautam.vivek@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/clk.h> > > +#include <linux/delay.h> > > +#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> > > +#include <linux/mutex.h> > > + > > +/* Exynos USB PHY registers */ > > +#define EXYNOS5_FSEL_9MHZ6 0x0 > > +#define EXYNOS5_FSEL_10MHZ 0x1 > > +#define EXYNOS5_FSEL_12MHZ 0x2 > > +#define EXYNOS5_FSEL_19MHZ2 0x3 > > +#define EXYNOS5_FSEL_20MHZ 0x4 > > +#define EXYNOS5_FSEL_24MHZ 0x5 > > +#define EXYNOS5_FSEL_50MHZ 0x7 > > + > > +/* EXYNOS5: USB 3.0 DRD PHY registers */ > > +#define EXYNOS5_DRD_LINKSYSTEM (0x04) > > + > > +#define LINKSYSTEM_FLADJ_MASK (0x3f << 1) > > +#define LINKSYSTEM_FLADJ(_x) ((_x) << 1) > > +#define LINKSYSTEM_XHCI_VERSION_CONTROL (0x1 << 27) > > + > > +#define EXYNOS5_DRD_PHYUTMI (0x08) > > + > > +#define PHYUTMI_OTGDISABLE (0x1 << 6) > > +#define PHYUTMI_FORCESUSPEND (0x1 << 1) > > +#define PHYUTMI_FORCESLEEP (0x1 << 0) > > + > > +#define EXYNOS5_DRD_PHYPIPE (0x0c) > > + > > +#define EXYNOS5_DRD_PHYCLKRST (0x10) > > + > > +#define PHYCLKRST_SSC_REFCLKSEL_MASK (0xff << 23) > > +#define PHYCLKRST_SSC_REFCLKSEL(_x) ((_x) << 23) > > + > > +#define PHYCLKRST_SSC_RANGE_MASK (0x03 << 21) > > +#define PHYCLKRST_SSC_RANGE(_x) ((_x) << 21) > > + > > +#define PHYCLKRST_SSC_EN (0x1 << 20) > > +#define PHYCLKRST_REF_SSP_EN (0x1 << 19) > > +#define PHYCLKRST_REF_CLKDIV2 (0x1 << 18) > > + > > +#define PHYCLKRST_MPLL_MULTIPLIER_MASK (0x7f << 11) > > +#define PHYCLKRST_MPLL_MULTIPLIER_100MHZ_REF (0x19 << 11) > > +#define PHYCLKRST_MPLL_MULTIPLIER_50M_REF (0x02 << 11) > > +#define PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF (0x68 << 11) > > +#define PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF (0x7d << 11) > > +#define PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF (0x02 << 11) > > + > > +#define PHYCLKRST_FSEL_MASK (0x3f << 5) > > +#define PHYCLKRST_FSEL(_x) ((_x) << 5) > > +#define PHYCLKRST_FSEL_PAD_100MHZ (0x27 << 5) > > +#define PHYCLKRST_FSEL_PAD_24MHZ (0x2a << 5) > > +#define PHYCLKRST_FSEL_PAD_20MHZ (0x31 << 5) > > +#define PHYCLKRST_FSEL_PAD_19_2MHZ (0x38 << 5) > > + > > +#define PHYCLKRST_RETENABLEN (0x1 << 4) > > + > > +#define PHYCLKRST_REFCLKSEL_MASK (0x03 << 2) > > +#define PHYCLKRST_REFCLKSEL_PAD_REFCLK (0x2 << 2) > > +#define PHYCLKRST_REFCLKSEL_EXT_REFCLK (0x3 << 2) > > + > > +#define PHYCLKRST_PORTRESET (0x1 << 1) > > +#define PHYCLKRST_COMMONONN (0x1 << 0) > > + > > +#define EXYNOS5_DRD_PHYREG0 (0x14) > > +#define EXYNOS5_DRD_PHYREG1 (0x18) > > + > > +#define EXYNOS5_DRD_PHYPARAM0 (0x1c) > > + > > +#define PHYPARAM0_REF_USE_PAD (0x1 << 31) > > +#define PHYPARAM0_REF_LOSLEVEL_MASK (0x1f << 26) > > +#define PHYPARAM0_REF_LOSLEVEL (0x9 << 26) > > + > > +#define EXYNOS5_DRD_PHYPARAM1 (0x20) > > + > > +#define PHYPARAM1_PCS_TXDEEMPH_MASK (0x1f << 0) > > +#define PHYPARAM1_PCS_TXDEEMPH (0x1c) > > + > > +#define EXYNOS5_DRD_PHYTERM (0x24) > > + > > +#define EXYNOS5_DRD_PHYTEST (0x28) > > + > > +#define PHYTEST_POWERDOWN_SSP (0x1 << 3) > > +#define PHYTEST_POWERDOWN_HSP (0x1 << 2) > > + > > +#define EXYNOS5_DRD_PHYADP (0x2c) > > + > > +#define EXYNOS5_DRD_PHYBATCHG (0x30) > > + > > +#define PHYBATCHG_UTMI_CLKSEL (0x1 << 2) > > + > > +#define EXYNOS5_DRD_PHYRESUME (0x34) > > +#define EXYNOS5_DRD_LINKPORT (0x44) > > + > > + > > +/* Isolation, configured in the power management unit */ > > +#define EXYNOS5_USB_ISOL_DRD (1 << 0) > > + > > +#define CLKSEL_ERROR -1 > > + > > +#ifndef KHZ > > +#define KHZ 1000 > > +#endif > > + > > +#ifndef MHZ > > +#define MHZ (KHZ * KHZ) > > +#endif > > + > > +enum samsung_cpu_type { > > + TYPE_EXYNOS5250, > > + TYPE_EXYNOS5420, > > +}; > > + > > +enum usb3phy_state { > > + STATE_OFF, > > + STATE_ON, > > +}; > > + > > +struct usb3phy_config { > > + enum samsung_cpu_type cpu; > > + bool has_sclk_usbphy30; > > +}; > > + > > +struct usb3phy_instance { > > + char *label; > > + struct usb3phy_driver *drv; > > + struct phy *phy; > > + enum usb3phy_state state; > > + u32 clk; > > + unsigned long rate; > > +}; > > + > > +struct usb3phy_driver { > > + struct device *dev; > > + void __iomem *reg_phy; > > + void __iomem *reg_isol; > > + struct clk *clk; > > + struct clk *sclk_usbphy30; > > + struct usb3phy_instance instance; > > +}; > > + > > +/* > > + * exynos5_rate_to_clk() converts the supplied clock rate to the > > +value that > > + * can be written to the phy register. > > + */ > > +static u32 exynos5_rate_to_clk(unsigned long rate) { > > + unsigned int clksel; > > + > > + /* EXYNOS5_FSEL_MASK */ > > + > > + switch (rate) { > > + case 9600 * KHZ: > > + clksel = EXYNOS5_FSEL_9MHZ6; > > + break; > > + case 10 * MHZ: > > + clksel = EXYNOS5_FSEL_10MHZ; > > + break; > > + case 12 * MHZ: > > + clksel = EXYNOS5_FSEL_12MHZ; > > + break; > > + case 19200 * KHZ: > > + clksel = EXYNOS5_FSEL_19MHZ2; > > + break; > > + case 20 * MHZ: > > + clksel = EXYNOS5_FSEL_20MHZ; > > + break; > > + case 24 * MHZ: > > + clksel = EXYNOS5_FSEL_24MHZ; > > + break; > > + case 50 * MHZ: > > + clksel = EXYNOS5_FSEL_50MHZ; > > + break; > > + default: > > + clksel = CLKSEL_ERROR; > > + } > > + > > + return clksel; > > +} > > + > > +static void exynos5_usb3phy_isol(struct usb3phy_instance *inst, bool > > +on) { > > + struct usb3phy_driver *drv = inst->drv; > > + u32 tmp; > > + > > + if (!drv->reg_isol) > > + return; > > + > > + tmp = readl(drv->reg_isol); > > + if (on) > > + tmp &= ~EXYNOS5_USB_ISOL_DRD; > > + else > > + tmp |= EXYNOS5_USB_ISOL_DRD; > > + writel(tmp, drv->reg_isol); > > +} > > + > > +/* > > + * Sets the phy clk as EXTREFCLK (XXTI) which is internal clock from > clock core. > > + */ > > +static u32 exynos5_usb3phy_set_refclk(struct usb3phy_instance *inst) > > +{ > > + u32 reg; > > + u32 refclk; > > + > > + refclk = inst->clk; > > + > > + reg = PHYCLKRST_REFCLKSEL_EXT_REFCLK | > > + PHYCLKRST_FSEL(refclk); > > + > > + switch (refclk) { > > + case EXYNOS5_FSEL_50MHZ: > > + reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF | > > + PHYCLKRST_SSC_REFCLKSEL(0x00)); > > + break; > > + case EXYNOS5_FSEL_20MHZ: > > + reg |= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF | > > + PHYCLKRST_SSC_REFCLKSEL(0x00)); > > + break; > > + case EXYNOS5_FSEL_19MHZ2: > > + reg |= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF | > > + PHYCLKRST_SSC_REFCLKSEL(0x88)); > > + break; > > + case EXYNOS5_FSEL_24MHZ: > > + default: > > + reg |= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF | > > + PHYCLKRST_SSC_REFCLKSEL(0x88)); > > + break; > > + } > > + > > + return reg; > > +} > > + > > +static void exynos5_usb3phy_init(struct usb3phy_instance *inst) { > > + struct usb3phy_driver *drv = inst->drv; > > + u32 phyparam0; > > + u32 phyparam1; > > + u32 linksystem; > > + u32 phybatchg; > > + u32 phytest; > > + u32 phyclkrst; > > + > > + /* Reset USB 3.0 PHY */ > > + writel(0x0, drv->reg_phy + EXYNOS5_DRD_PHYREG0); > > + > > + phyparam0 = readl(drv->reg_phy + EXYNOS5_DRD_PHYPARAM0); > > + /* Select PHY CLK source */ > > + phyparam0 &= ~PHYPARAM0_REF_USE_PAD; > > + /* Set Loss-of-Signal Detector sensitivity */ > > + phyparam0 &= ~PHYPARAM0_REF_LOSLEVEL_MASK; > > + phyparam0 |= PHYPARAM0_REF_LOSLEVEL; > > + writel(phyparam0, drv->reg_phy + EXYNOS5_DRD_PHYPARAM0); > > + > > + writel(0x0, drv->reg_phy + EXYNOS5_DRD_PHYRESUME); > > + > > + /* > > + * Setting the Frame length Adj value[6:1] to default 0x20 > > + * See xHCI 1.0 spec, 5.2.4 > > + */ > > + linksystem = LINKSYSTEM_XHCI_VERSION_CONTROL | > > + LINKSYSTEM_FLADJ(0x20); > > + writel(linksystem, drv->reg_phy + EXYNOS5_DRD_LINKSYSTEM); > > + > > + phyparam1 = readl(drv->reg_phy + EXYNOS5_DRD_PHYPARAM1); > > + /* Set Tx De-Emphasis level */ > > + phyparam1 &= ~PHYPARAM1_PCS_TXDEEMPH_MASK; > > + phyparam1 |= PHYPARAM1_PCS_TXDEEMPH; > > + writel(phyparam1, drv->reg_phy + EXYNOS5_DRD_PHYPARAM1); > > + > > + phybatchg = readl(drv->reg_phy + EXYNOS5_DRD_PHYBATCHG); > > + phybatchg |= PHYBATCHG_UTMI_CLKSEL; > > + writel(phybatchg, drv->reg_phy + EXYNOS5_DRD_PHYBATCHG); > > + > > + /* PHYTEST POWERDOWN Control */ > > + phytest = readl(drv->reg_phy + EXYNOS5_DRD_PHYTEST); > > + phytest &= ~(PHYTEST_POWERDOWN_SSP | > > + PHYTEST_POWERDOWN_HSP); > > + writel(phytest, drv->reg_phy + EXYNOS5_DRD_PHYTEST); > > + > > + /* UTMI Power Control */ > > + writel(PHYUTMI_OTGDISABLE, drv->reg_phy + EXYNOS5_DRD_PHYUTMI); > > + > > + phyclkrst = exynos5_usb3phy_set_refclk(inst); > > + > > + phyclkrst |= PHYCLKRST_PORTRESET | > > + /* Digital power supply in normal operating mode */ > > + PHYCLKRST_RETENABLEN | > > + /* Enable ref clock for SS function */ > > + PHYCLKRST_REF_SSP_EN | > > + /* Enable spread spectrum */ > > + PHYCLKRST_SSC_EN | > > + /* Power down HS Bias and PLL blocks in suspend mode > */ > > + PHYCLKRST_COMMONONN; > > + > > + writel(phyclkrst, drv->reg_phy + EXYNOS5_DRD_PHYCLKRST); > > + > > + udelay(10); > > + > > + phyclkrst &= ~PHYCLKRST_PORTRESET; > > + writel(phyclkrst, drv->reg_phy + EXYNOS5_DRD_PHYCLKRST); > > + > > +} > > + > > +static void exynos5_usb3phy_exit(struct usb3phy_instance *inst) { > > + struct usb3phy_driver *drv = inst->drv; > > + u32 phyutmi; > > + u32 phyclkrst; > > + u32 phytest; > > + > > + phyutmi = PHYUTMI_OTGDISABLE | > > + PHYUTMI_FORCESUSPEND | > > + PHYUTMI_FORCESLEEP; > > + writel(phyutmi, drv->reg_phy + EXYNOS5_DRD_PHYUTMI); > > + > > + /* Resetting the PHYCLKRST enable bits to reduce leakage current > */ > > + phyclkrst = readl(drv->reg_phy + EXYNOS5_DRD_PHYCLKRST); > > + phyclkrst &= ~(PHYCLKRST_REF_SSP_EN | > > + PHYCLKRST_SSC_EN | > > + PHYCLKRST_COMMONONN); > > + writel(phyclkrst, drv->reg_phy + EXYNOS5_DRD_PHYCLKRST); > > + > > + /* Control PHYTEST to remove leakage current */ > > + phytest = readl(drv->reg_phy + EXYNOS5_DRD_PHYTEST); > > + phytest |= PHYTEST_POWERDOWN_SSP | > > + PHYTEST_POWERDOWN_HSP; > > + writel(phytest, drv->reg_phy + EXYNOS5_DRD_PHYTEST); } > > + > > +static int exynos5_usb3phy_power_on(struct phy *phy) { > > + struct usb3phy_instance *inst = phy_get_drvdata(phy); > > + struct usb3phy_driver *drv = inst->drv; > > + int ret; > > + > > + dev_info(drv->dev, "Request to power_on \"%s\" usb phy\n", > > + inst->label); > > + > > + if (drv->sclk_usbphy30) > > + clk_prepare_enable(drv->sclk_usbphy30); > > + > > + ret = clk_prepare_enable(drv->clk); > > + if (ret) > > + return ret; > > + > > + if (inst->state == STATE_ON) { > > + dev_err(drv->dev, "usb phy \"%s\" already on", > > + inst->label); > > + ret = -ENODEV; > > + goto err0; > > + } > > + > > + inst->state = STATE_ON; > > + > > + /* Initialize the PHY and power it ON */ > > + exynos5_usb3phy_init(inst); > > + exynos5_usb3phy_isol(inst, 0); > > + > > +err0: > > + clk_disable_unprepare(drv->clk); > > + > > + return ret; > > +} > > + > > +static int exynos5_usb3phy_power_off(struct phy *phy) { > > + struct usb3phy_instance *inst = phy_get_drvdata(phy); > > + struct usb3phy_driver *drv = inst->drv; > > + int ret; > > + > > + dev_info(drv->dev, "Request to power_off \"%s\" usb phy\n", > > + inst->label); > > + ret = clk_prepare_enable(drv->clk); > > + if (ret) > > + return ret; > > + > > + if (inst->state == STATE_OFF) { > > + dev_err(drv->dev, "usb phy \"%s\" already off", > > + inst->label); > > + ret = -ENODEV; > > + goto err0; > > + } > > + > > + inst->state = STATE_OFF; > > + > > + /* Power-off the PHY and de-initialize it */ > > + exynos5_usb3phy_isol(inst, 1); > > + exynos5_usb3phy_exit(inst); > > + > > +err0: > > + clk_disable_unprepare(drv->clk); > > + if (drv->sclk_usbphy30) > > + clk_disable_unprepare(drv->sclk_usbphy30); > > + > > + return ret; > > +} > > + > > +static struct phy_ops exynos5_usb3phy_ops = { > > + .power_on = exynos5_usb3phy_power_on, > > + .power_off = exynos5_usb3phy_power_off, > > + .owner = THIS_MODULE, > > +}; > > + > > +static const struct of_device_id exynos5_usb3phy_of_match[]; > > + > > +static int exynos5_usb3phy_probe(struct platform_device *pdev) { > > + struct device *dev = &pdev->dev; > > + struct usb3phy_driver *drv; > > + struct usb3phy_instance *inst; > > + struct phy_provider *phy_provider; > > + struct resource *res; > > + struct clk *clk; > > + const struct of_device_id *match; > > + const struct usb3phy_config *cfg; > > + > > + match = of_match_node(exynos5_usb3phy_of_match, pdev- > >dev.of_node); > > + if (!match) { > > + dev_err(dev, "of_match_node() failed\n"); > > + return -EINVAL; > > + } > > + cfg = match->data; > > + if (!cfg) { > > + dev_err(dev, "Failed to get configuration\n"); > > + return -EINVAL; > > + } > > + > > + drv = devm_kzalloc(dev, sizeof(struct usb3phy_driver), > GFP_KERNEL); > > + if (!drv) { > > + dev_err(dev, "Failed to allocate memory\n"); > > + return -ENOMEM; > > + } > > + > > + dev_set_drvdata(dev, drv); > > + drv->dev = dev; > > + > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > > + drv->reg_phy = devm_ioremap_resource(dev, res); > > + if (IS_ERR(drv->reg_phy)) { > > + dev_err(dev, "Failed to map register memory (phy)\n"); > > + return PTR_ERR(drv->reg_phy); > > + } > > + > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); > > + drv->reg_isol = devm_ioremap_resource(dev, res); > > + if (IS_ERR(drv->reg_isol)) { > > + dev_err(dev, "Failed to map register memory (isolation)\n"); > > + return PTR_ERR(drv->reg_isol); > > + } > > + > > + phy_provider = devm_of_phy_provider_register(dev, > of_phy_simple_xlate); > > + if (IS_ERR(phy_provider)) { > > + dev_err(drv->dev, "Failed to register phy provider\n"); > > + return PTR_ERR(phy_provider); > > + } > > + > > + drv->clk = devm_clk_get(dev, "phy"); > > + if (IS_ERR(drv->clk)) { > > + dev_err(dev, "Failed to get clock of phy controller\n"); > > + return PTR_ERR(drv->clk); > > + } > > + > > + /* > > + * Exysno5420 SoC has an additional special clock, used for > > + * for USB 3.0 PHY operation, this clock goes to the PHY block > > + * as a reference clock to clock generation block of the > controller. > > + */ > > + if (cfg->has_sclk_usbphy30) { > > + drv->sclk_usbphy30 = devm_clk_get(dev, "sclk_usbphy30"); > > + if (IS_ERR(drv->clk)) { > > + dev_err(dev, "Failed to get phy reference clock\n"); > > + return PTR_ERR(drv->clk); > > + } > > + } > > + > > + inst = &drv->instance; > > + inst->drv = drv; > > + inst->label = "usb3drd"; > > + > > + dev_info(dev, "Creating phy \"%s\"\n", inst->label); > > + inst->phy = devm_phy_create(dev, &exynos5_usb3phy_ops, NULL); > > + if (IS_ERR(inst->phy)) { > > + dev_err(drv->dev, "Failed to create usb3phy \"%s\"\n", > > + inst->label); > > + return PTR_ERR(inst->phy); > > + } > > + > > + phy_set_drvdata(inst->phy, inst); > > + > > + clk = clk_get(dev, inst->label); > > + if (IS_ERR(clk)) { > > + dev_err(dev, "Failed to get clock of \"%s\" phy\n", > > + inst->label); > > + return PTR_ERR(clk); > > + } > > + > > + inst->rate = clk_get_rate(clk); > > + > > + inst->clk = exynos5_rate_to_clk(inst->rate); > > + if (inst->clk == CLKSEL_ERROR) { > > + dev_err(dev, "Clock rate (%ld) not supported\n", > > + inst->rate); > > + clk_put(clk); > > + return -EINVAL; > > + } > > + clk_put(clk); > > + > > + return 0; > > +} > > + > > +const struct usb3phy_config exynos5420_usb3phy_cfg = { > > + .cpu = TYPE_EXYNOS5420, > > + .has_sclk_usbphy30 = true, > > +}; > > + > > +const struct usb3phy_config exynos5250_usb3phy_cfg = { > > + .cpu = TYPE_EXYNOS5250, > > + .has_sclk_usbphy30 = false, > > +}; > > + > > +static const struct of_device_id exynos5_usb3phy_of_match[] = { > > + { > > + .compatible = "samsung,exynos5250-usb3phy", > > + .data = &exynos5250_usb3phy_cfg > > + }, { > > + .compatible = "samsung,exynos5420-usb3phy", > > + .data = &exynos5420_usb3phy_cfg > > + }, > > + { }, > > +}; > > + > > +static struct platform_driver exynos5_usb3phy_driver = { > > + .probe = exynos5_usb3phy_probe, > > + .driver = { > > + .of_match_table = exynos5_usb3phy_of_match, > > + .name = "exynos5-usb3phy", > > + .owner = THIS_MODULE, > > + } > > +}; > > + > > +module_platform_driver(exynos5_usb3phy_driver); > > +MODULE_DESCRIPTION("Samsung EXYNOS5 series SoC USB 3.0 PHY driver"); > > +MODULE_AUTHOR("Vivek Gautam <gautam.vivek@xxxxxxxxxxx>"); > > +MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:exynos5-usb3phy"); > > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
