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Date: Wed, 17 Sep 2014 16:47:41 +0530
From: Vivek Gautam <gautam.vivek@...sung.com>
To: linux-usb@...r.kernel.org
Cc: linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
gregkh@...uxfoundation.org, stern@...land.harvard.edu,
kgene.kim@...sung.com, jg1.han@...sung.com,
Vivek Gautam <gautam.vivek@...sung.com>
Subject: [PATCH v3 1/2] usb: host: ehci-exynos: Remove unnecessary usb-phy support
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.
Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>
---
drivers/usb/host/ehci-exynos.c | 81 ++++++++++++----------------------------
1 file changed, 23 insertions(+), 58 deletions(-)
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 2eed9a4..99c5f5f 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -21,11 +21,8 @@
#include <linux/of_gpio.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.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 "ehci.h"
@@ -47,9 +44,7 @@ static struct hc_driver __read_mostly exynos_ehci_hc_driver;
struct exynos_ehci_hcd {
struct clk *clk;
- struct usb_phy *phy;
- struct usb_otg *otg;
- struct phy *phy_g[PHY_NUMBER];
+ struct phy *phy[PHY_NUMBER];
};
#define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv)
@@ -59,49 +54,39 @@ static int exynos_ehci_get_phy(struct device *dev,
{
struct device_node *child;
struct phy *phy;
- int phy_number;
- int ret = 0;
+ int phy_num;
+ int ret;
for_each_available_child_of_node(dev->of_node, child) {
- ret = of_property_read_u32(child, "reg", &phy_number);
+ ret = of_property_read_u32(child, "reg", &phy_num);
if (ret) {
dev_err(dev, "Failed to parse device tree\n");
of_node_put(child);
return ret;
}
- if (phy_number >= PHY_NUMBER) {
+ if (phy_num >= PHY_NUMBER) {
dev_err(dev, "Invalid number of PHYs\n");
of_node_put(child);
return -EINVAL;
}
- phy = devm_of_phy_get(dev, child, NULL);
+ exynos_ehci->phy[phy_num] = devm_of_phy_get(dev, child, NULL);
+ phy = exynos_ehci->phy[phy_num];
of_node_put(child);
- if (IS_ERR(phy))
- /* Lets fallback to older USB-PHYs */
- goto usb_phy_old;
- exynos_ehci->phy_g[phy_number] = phy;
- /* Make the older PHYs unavailable */
- exynos_ehci->phy = ERR_PTR(-ENXIO);
- }
-
- return 0;
-
-usb_phy_old:
- exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
- if (IS_ERR(exynos_ehci->phy)) {
- ret = PTR_ERR(exynos_ehci->phy);
- if (ret != -ENXIO && ret != -ENODEV) {
- dev_err(dev, "no usb2 phy configured\n");
- return ret;
+ if (IS_ERR(phy)) {
+ ret = PTR_ERR(phy);
+ if (ret == -EPROBE_DEFER) {
+ return ret;
+ } else if (ret != -ENOSYS && ret != -ENODEV) {
+ dev_err(dev,
+ "Error retrieving usb2 phy: %d\n", ret);
+ return PTR_ERR(phy);
+ }
}
- dev_dbg(dev, "Failed to get usb2 phy\n");
- } else {
- exynos_ehci->otg = exynos_ehci->phy->otg;
}
- return ret;
+ return 0;
}
static int exynos_ehci_phy_enable(struct device *dev)
@@ -111,16 +96,13 @@ static int exynos_ehci_phy_enable(struct device *dev)
int i;
int ret = 0;
- if (!IS_ERR(exynos_ehci->phy))
- return usb_phy_init(exynos_ehci->phy);
-
for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
- if (!IS_ERR(exynos_ehci->phy_g[i]))
- ret = phy_power_on(exynos_ehci->phy_g[i]);
+ if (!IS_ERR(exynos_ehci->phy[i]))
+ ret = phy_power_on(exynos_ehci->phy[i]);
if (ret)
for (i--; i >= 0; i--)
- if (!IS_ERR(exynos_ehci->phy_g[i]))
- phy_power_off(exynos_ehci->phy_g[i]);
+ if (!IS_ERR(exynos_ehci->phy[i]))
+ phy_power_off(exynos_ehci->phy[i]);
return ret;
}
@@ -131,14 +113,9 @@ static void exynos_ehci_phy_disable(struct device *dev)
struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
int i;
- if (!IS_ERR(exynos_ehci->phy)) {
- usb_phy_shutdown(exynos_ehci->phy);
- return;
- }
-
for (i = 0; i < PHY_NUMBER; i++)
- if (!IS_ERR(exynos_ehci->phy_g[i]))
- phy_power_off(exynos_ehci->phy_g[i]);
+ if (!IS_ERR(exynos_ehci->phy[i]))
+ phy_power_off(exynos_ehci->phy[i]);
}
static void exynos_setup_vbus_gpio(struct device *dev)
@@ -231,9 +208,6 @@ skip_phy:
goto fail_io;
}
- if (exynos_ehci->otg)
- exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
-
err = exynos_ehci_phy_enable(&pdev->dev);
if (err) {
dev_err(&pdev->dev, "Failed to enable USB phy\n");
@@ -273,9 +247,6 @@ static int exynos_ehci_remove(struct platform_device *pdev)
usb_remove_hcd(hcd);
- if (exynos_ehci->otg)
- exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
-
exynos_ehci_phy_disable(&pdev->dev);
clk_disable_unprepare(exynos_ehci->clk);
@@ -298,9 +269,6 @@ static int exynos_ehci_suspend(struct device *dev)
if (rc)
return rc;
- if (exynos_ehci->otg)
- exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
-
exynos_ehci_phy_disable(dev);
clk_disable_unprepare(exynos_ehci->clk);
@@ -316,9 +284,6 @@ static int exynos_ehci_resume(struct device *dev)
clk_prepare_enable(exynos_ehci->clk);
- if (exynos_ehci->otg)
- exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
-
ret = exynos_ehci_phy_enable(dev);
if (ret) {
dev_err(dev, "Failed to enable USB phy\n");
--
1.7.10.4
--
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