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Date: Mon, 18 Aug 2014 10:36:56 +0900
From: Jingoo Han <jg1.han@...sung.com>
To: 'Vivek Gautam' <gautam.vivek@...sung.com>
Cc: linux-usb@...r.kernel.org, balbi@...com,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
grant.likely@...aro.org, gregkh@...uxfoundation.org,
stern@...land.harvard.edu, s.nawrocki@...sung.com,
k.debski@...sung.com, 'Jingoo Han' <jg1.han@...sung.com>
Subject: Re: [PATCH RFC 7/7] usb: host: ohci-exynos: Remove unnecessary usb-phy
support
On Thursday, August 14, 2014 11:24 PM, Vivek Gautam wrote:
>
> Now that we have completely moved from older USB-PHY drivers
> to newer GENERIC-PHY drivers for PHYs available with USB controllers
> on Exynos series of SoCs, we can remove the support for the same
> in our host drivers too.
> This should fix the issue on ohci-exynos, wherein in the absence of
> SAMSUNG_USB2PHY config symbol, we ended up getting the NOP_USB_XCEIV phy
> when the same is enabled. And thus the PHYs are not configured properly.
>
> Reported-by: Sachin Kamat <sachin.kamat@...sung.com>
> Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>
Reviewed-by: Jingoo Han <jg1.han@...sung.com>
Best regards,
Jingoo Han
> ---
> drivers/usb/host/ohci-exynos.c | 64 ++++++----------------------------------
> 1 file changed, 9 insertions(+), 55 deletions(-)
>
> diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
> index a72ab8f..0199a8b 100644
> --- a/drivers/usb/host/ohci-exynos.c
> +++ b/drivers/usb/host/ohci-exynos.c
> @@ -19,11 +19,8 @@
> #include <linux/of.h>
> #include <linux/platform_device.h>
> #include <linux/phy/phy.h>
> -#include <linux/usb/phy.h>
> -#include <linux/usb/samsung_usb_phy.h>
> #include <linux/usb.h>
> #include <linux/usb/hcd.h>
> -#include <linux/usb/otg.h>
>
> #include "ohci.h"
>
> @@ -38,9 +35,7 @@ static struct hc_driver __read_mostly exynos_ohci_hc_driver;
>
> struct exynos_ohci_hcd {
> struct clk *clk;
> - struct usb_phy *phy;
> - struct usb_otg *otg;
> - struct phy *phy_g[PHY_NUMBER];
> + struct phy *phy[PHY_NUMBER];
> };
>
> static int exynos_ohci_get_phy(struct device *dev,
> @@ -51,28 +46,7 @@ static int exynos_ohci_get_phy(struct device *dev,
> int phy_number;
> int ret = 0;
>
> - exynos_ohci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
> - if (IS_ERR(exynos_ohci->phy)) {
> - ret = PTR_ERR(exynos_ohci->phy);
> - if (ret != -ENXIO && ret != -ENODEV) {
> - dev_err(dev, "no usb2 phy configured\n");
> - return ret;
> - }
> - dev_dbg(dev, "Failed to get usb2 phy\n");
> - } else {
> - exynos_ohci->otg = exynos_ohci->phy->otg;
> - }
> -
> - /*
> - * Getting generic phy:
> - * We are keeping both types of phys as a part of transiting OHCI
> - * to generic phy framework, so as to maintain backward compatibilty
> - * with old DTB.
> - * If there are existing devices using DTB files built from them,
> - * to remove the support for old bindings in this driver,
> - * we need to make sure that such devices have their DTBs
> - * updated to ones built from new DTS.
> - */
> + /* Get the generic phys */
> for_each_available_child_of_node(dev->of_node, child) {
> ret = of_property_read_u32(child, "reg", &phy_number);
> if (ret) {
> @@ -97,7 +71,7 @@ static int exynos_ohci_get_phy(struct device *dev,
> }
> dev_dbg(dev, "Failed to get usb2 phy\n");
> }
> - exynos_ohci->phy_g[phy_number] = phy;
> + exynos_ohci->phy[phy_number] = phy;
> }
>
> return ret;
> @@ -110,16 +84,13 @@ static int exynos_ohci_phy_enable(struct device *dev)
> int i;
> int ret = 0;
>
> - if (!IS_ERR(exynos_ohci->phy))
> - return usb_phy_init(exynos_ohci->phy);
> -
> for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
> - if (!IS_ERR(exynos_ohci->phy_g[i]))
> - ret = phy_power_on(exynos_ohci->phy_g[i]);
> + if (!IS_ERR(exynos_ohci->phy[i]))
> + ret = phy_power_on(exynos_ohci->phy[i]);
> if (ret)
> for (i--; i >= 0; i--)
> - if (!IS_ERR(exynos_ohci->phy_g[i]))
> - phy_power_off(exynos_ohci->phy_g[i]);
> + if (!IS_ERR(exynos_ohci->phy[i]))
> + phy_power_off(exynos_ohci->phy[i]);
>
> return ret;
> }
> @@ -130,14 +101,9 @@ static void exynos_ohci_phy_disable(struct device *dev)
> struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
> int i;
>
> - if (!IS_ERR(exynos_ohci->phy)) {
> - usb_phy_shutdown(exynos_ohci->phy);
> - return;
> - }
> -
> for (i = 0; i < PHY_NUMBER; i++)
> - if (!IS_ERR(exynos_ohci->phy_g[i]))
> - phy_power_off(exynos_ohci->phy_g[i]);
> + if (!IS_ERR(exynos_ohci->phy[i]))
> + phy_power_off(exynos_ohci->phy[i]);
> }
>
> static int exynos_ohci_probe(struct platform_device *pdev)
> @@ -209,9 +175,6 @@ skip_phy:
> goto fail_io;
> }
>
> - if (exynos_ohci->otg)
> - exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
> -
> platform_set_drvdata(pdev, hcd);
>
> err = exynos_ohci_phy_enable(&pdev->dev);
> @@ -244,9 +207,6 @@ static int exynos_ohci_remove(struct platform_device *pdev)
>
> usb_remove_hcd(hcd);
>
> - if (exynos_ohci->otg)
> - exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
> -
> exynos_ohci_phy_disable(&pdev->dev);
>
> clk_disable_unprepare(exynos_ohci->clk);
> @@ -275,9 +235,6 @@ static int exynos_ohci_suspend(struct device *dev)
> if (rc)
> return rc;
>
> - if (exynos_ohci->otg)
> - exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
> -
> exynos_ohci_phy_disable(dev);
>
> clk_disable_unprepare(exynos_ohci->clk);
> @@ -293,9 +250,6 @@ static int exynos_ohci_resume(struct device *dev)
>
> clk_prepare_enable(exynos_ohci->clk);
>
> - if (exynos_ohci->otg)
> - exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
> -
> ret = exynos_ohci_phy_enable(dev);
> if (ret) {
> dev_err(dev, "Failed to enable USB phy\n");
> --
> 1.7.10.4
--
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