[PATCH v2 09/11] usb: ohci-da8xx: Remove code that references mach

David Lechner
2016-03-17T03:41:04Z

Including mach/* is frowned upon in device drivers, so get rid of it.

This replaces usb20_clk and code that pokes CFGCHIP2 with a proper phy
driver.

Signed-off-by: David Lechner <david@lechnology.com>
---

v2 changes: Uses the new phy driver instead of using a second clock.

drivers/usb/host/ohci-da8xx.c | 90 +++++++++++++++++++++----------------------
1 file changed, 44 insertions(+), 46 deletions(-)

diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c
index e5c33bc..c648674 100644
--- a/drivers/usb/host/ohci-da8xx.c
+++ b/drivers/usb/host/ohci-da8xx.c
@@ -15,58 +15,40 @@
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
-
-#include <mach/da8xx.h>
+#include <linux/phy/phy.h>
#include <linux/platform_data/usb-davinci.h>

#ifndef CONFIG_ARCH_DAVINCI_DA8XX
#error "This file is DA8xx bus glue. Define CONFIG_ARCH_DAVINCI_DA8XX."
#endif

-#define CFGCHIP2 DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG)
-
static struct clk *usb11_clk;
-static struct clk *usb20_clk;
+static struct phy *usb11_phy;

/* Over-current indicator change bitmask */
static volatile u16 ocic_mask;

-static void ohci_da8xx_clock(int on)
+static int ohci_da8xx_enable(void)
{
- u32 cfgchip2;
-
- cfgchip2 = __raw_readl(CFGCHIP2);
- if (on) {
- clk_enable(usb11_clk);
-
- /*
- * If USB 1.1 reference clock is sourced from USB 2.0 PHY, we
- * need to enable the USB 2.0 module clocking, start its PHY,
- * and not allow it to stop the clock during USB 2.0 suspend.
- */
- if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX)) {
- clk_enable(usb20_clk);
-
- cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN);
- cfgchip2 |= CFGCHIP2_PHY_PLLON;
- __raw_writel(cfgchip2, CFGCHIP2);
-
- pr_info("Waiting for USB PHY clock good...\n");
- while (!(__raw_readl(CFGCHIP2) & CFGCHIP2_PHYCLKGD))
- cpu_relax();
- }
+ int ret;

- /* Enable USB 1.1 PHY */
- cfgchip2 |= CFGCHIP2_USB1SUSPENDM;
- } else {
- clk_disable(usb11_clk);
- if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX))
- clk_disable(usb20_clk);
+ ret = clk_prepare_enable(usb11_clk);
+ if (ret)
+ return ret;

- /* Disable USB 1.1 PHY */
- cfgchip2 &= ~CFGCHIP2_USB1SUSPENDM;
+ ret = phy_power_on(usb11_phy);
+ if (ret) {
+ clk_disable_unprepare(usb11_clk);
+ return ret;
}
- __raw_writel(cfgchip2, CFGCHIP2);
+
+ return 0;
+}
+
+static void ohci_da8xx_disable(void)
+{
+ phy_power_off(usb11_phy);
+ clk_disable_unprepare(usb11_clk);
}

/*
@@ -92,7 +74,9 @@ static int ohci_da8xx_init(struct usb_hcd *hcd)

dev_dbg(dev, "starting USB controller\n");

- ohci_da8xx_clock(1);
+ result = ohci_da8xx_enable();
+ if (result < 0)
+ return result;

/*
* DA8xx only have 1 port connected to the pins but the HC root hub
@@ -101,8 +85,10 @@ static int ohci_da8xx_init(struct usb_hcd *hcd)
ohci->num_ports = 1;

result = ohci_init(ohci);
- if (result < 0)
+ if (result < 0) {
+ ohci_da8xx_disable();
return result;
+ }

/*
* Since we're providing a board-specific root hub port power control
@@ -129,7 +115,7 @@ static int ohci_da8xx_init(struct usb_hcd *hcd)
static void ohci_da8xx_stop(struct usb_hcd *hcd)
{
ohci_stop(hcd);
- ohci_da8xx_clock(0);
+ ohci_da8xx_disable();
}

static int ohci_da8xx_start(struct usb_hcd *hcd)
@@ -301,12 +287,18 @@ static int usb_hcd_da8xx_probe(const struct hc_driver *driver,
return -ENODEV;

usb11_clk = devm_clk_get(&pdev->dev, "usb11");
- if (IS_ERR(usb11_clk))
+ if (IS_ERR(usb11_clk)) {
+ if (PTR_ERR(usb11_clk) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to get clock.\n");
return PTR_ERR(usb11_clk);
+ }

- usb20_clk = devm_clk_get(&pdev->dev, "usb20");
- if (IS_ERR(usb20_clk))
- return PTR_ERR(usb20_clk);
+ usb11_phy = devm_phy_get(&pdev->dev, "usbphy");
+ if (IS_ERR(usb11_phy)) {
+ if (PTR_ERR(usb11_phy) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to get phy.\n");
+ return PTR_ERR(usb11_phy);
+ }

hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd)
@@ -316,6 +308,7 @@ static int usb_hcd_da8xx_probe(const struct hc_driver *driver,
hcd->regs = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(hcd->regs)) {
error = PTR_ERR(hcd->regs);
+ dev_err(&pdev->dev, "failed to map ohci.\n");
goto err;
}
hcd->rsrc_start = mem->start;
@@ -397,7 +390,7 @@ static int ohci_da8xx_suspend(struct platform_device *pdev,
if (ret)
return ret;

- ohci_da8xx_clock(0);
+ ohci_da8xx_disable();
hcd->state = HC_STATE_SUSPENDED;

return ret;
@@ -407,14 +400,19 @@ static int ohci_da8xx_resume(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;

if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;

- ohci_da8xx_clock(1);
+ ret = ohci_da8xx_enable();
+ if (ret)
+ return ret;
+
dev->dev.power.power_state = PMSG_ON;
usb_hcd_resume_root_hub(hcd);
+
return 0;
}
#endif
--
1.9.1