diff options
| author | Jingoo Han <jg1.han@samsung.com> | 2011-12-23 02:19:36 (GMT) |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-12-23 02:21:28 (GMT) |
| commit | 6e7eb170fda0ee14a2cb75a70825a2328fa1f9b8 (patch) | |
| tree | dc318840a156031d9b099a7be45f5be6df246768 /arch/arm/mach-exynos/setup-usb-phy.c | |
| parent | 384703b8e6cd4c8ef08512e596024e028c91c339 (diff) | |
| download | linux-fsl-qoriq-6e7eb170fda0ee14a2cb75a70825a2328fa1f9b8.tar.xz | |
ARM: EXYNOS: Add USB OHCI device
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/mach-exynos/setup-usb-phy.c')
| -rw-r--r-- | arch/arm/mach-exynos/setup-usb-phy.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/setup-usb-phy.c b/arch/arm/mach-exynos/setup-usb-phy.c index 39aca04..41743d2 100644 --- a/arch/arm/mach-exynos/setup-usb-phy.c +++ b/arch/arm/mach-exynos/setup-usb-phy.c @@ -19,6 +19,13 @@ #include <plat/cpu.h> #include <plat/usb-phy.h> +static atomic_t host_usage; + +static int exynos4_usb_host_phy_is_on(void) +{ + return (readl(EXYNOS4_PHYPWR) & PHY1_STD_ANALOG_POWERDOWN) ? 0 : 1; +} + static int exynos4_usb_phy1_init(struct platform_device *pdev) { struct clk *otg_clk; @@ -27,6 +34,8 @@ static int exynos4_usb_phy1_init(struct platform_device *pdev) u32 rstcon; int err; + atomic_inc(&host_usage); + otg_clk = clk_get(&pdev->dev, "otg"); if (IS_ERR(otg_clk)) { dev_err(&pdev->dev, "Failed to get otg clock\n"); @@ -39,6 +48,9 @@ static int exynos4_usb_phy1_init(struct platform_device *pdev) return err; } + if (exynos4_usb_host_phy_is_on()) + return 0; + writel(readl(S5P_USBHOST_PHY_CONTROL) | S5P_USBHOST_PHY_ENABLE, S5P_USBHOST_PHY_CONTROL); @@ -95,6 +107,9 @@ static int exynos4_usb_phy1_exit(struct platform_device *pdev) struct clk *otg_clk; int err; + if (atomic_dec_return(&host_usage) > 0) + return 0; + otg_clk = clk_get(&pdev->dev, "otg"); if (IS_ERR(otg_clk)) { dev_err(&pdev->dev, "Failed to get otg clock\n"); |