diff options
Diffstat (limited to 'drivers/usb/host/ohci-at91.c')
| -rw-r--r-- | drivers/usb/host/ohci-at91.c | 50 |
1 files changed, 33 insertions, 17 deletions
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index 930346487278..d849c809acbd 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -18,19 +18,38 @@ #include <asm/mach-types.h> #include <asm/hardware.h> #include <asm/arch/board.h> +#include <asm/arch/cpu.h> #ifndef CONFIG_ARCH_AT91 #error "CONFIG_ARCH_AT91 must be defined." #endif -/* interface and function clocks */ -static struct clk *iclk, *fclk; +/* interface and function clocks; sometimes also an AHB clock */ +static struct clk *iclk, *fclk, *hclk; static int clocked; extern int usb_disabled(void); /*-------------------------------------------------------------------------*/ +static void at91_start_clock(void) +{ + if (cpu_is_at91sam9261()) + clk_enable(hclk); + clk_enable(iclk); + clk_enable(fclk); + clocked = 1; +} + +static void at91_stop_clock(void) +{ + clk_disable(fclk); + clk_disable(iclk); + if (cpu_is_at91sam9261()) + clk_disable(hclk); + clocked = 0; +} + static void at91_start_hc(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); @@ -41,9 +60,7 @@ static void at91_start_hc(struct platform_device *pdev) /* * Start the USB clocks. */ - clk_enable(iclk); - clk_enable(fclk); - clocked = 1; + at91_start_clock(); /* * The USB host controller must remain in reset. @@ -66,9 +83,7 @@ static void at91_stop_hc(struct platform_device *pdev) /* * Stop the USB clocks. */ - clk_disable(fclk); - clk_disable(iclk); - clocked = 0; + at91_stop_clock(); } @@ -126,6 +141,8 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver, iclk = clk_get(&pdev->dev, "ohci_clk"); fclk = clk_get(&pdev->dev, "uhpck"); + if (cpu_is_at91sam9261()) + hclk = clk_get(&pdev->dev, "hck0"); at91_start_hc(pdev); ohci_hcd_init(hcd_to_ohci(hcd)); @@ -137,6 +154,8 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver, /* Error handling */ at91_stop_hc(pdev); + if (cpu_is_at91sam9261()) + clk_put(hclk); clk_put(fclk); clk_put(iclk); @@ -171,9 +190,11 @@ static int usb_hcd_at91_remove(struct usb_hcd *hcd, iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + if (cpu_is_at91sam9261()) + clk_put(hclk); clk_put(fclk); clk_put(iclk); - fclk = iclk = NULL; + fclk = iclk = hclk = NULL; dev_set_drvdata(&pdev->dev, NULL); return 0; @@ -280,9 +301,7 @@ ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) */ if (at91_suspend_entering_slow_clock()) { ohci_usb_reset (ohci); - clk_disable(fclk); - clk_disable(iclk); - clocked = 0; + at91_stop_clock(); } return 0; @@ -295,11 +314,8 @@ static int ohci_hcd_at91_drv_resume(struct platform_device *pdev) if (device_may_wakeup(&pdev->dev)) disable_irq_wake(hcd->irq); - if (!clocked) { - clk_enable(iclk); - clk_enable(fclk); - clocked = 1; - } + if (!clocked) + at91_start_clock(); return 0; } |