From mboxrd@z Thu Jan 1 00:00:00 1970 From: abrestic@chromium.org (Andrew Bresticker) Date: Wed, 14 May 2014 17:33:01 -0700 Subject: [RFC PATCH 05/10] ARM: tegra: Export function to read USB calibration data In-Reply-To: <1400113986-339-1-git-send-email-abrestic@chromium.org> References: <1400113986-339-1-git-send-email-abrestic@chromium.org> Message-ID: <1400113986-339-6-git-send-email-abrestic@chromium.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Board-specific USB configuration data is stored in FUSE_SKU_CALIB_0. Export a function to read it so the PHY can be properly configured. Signed-off-by: Andrew Bresticker --- arch/arm/mach-tegra/fuse.c | 13 +++++++++++++ include/linux/tegra-soc.h | 1 + 2 files changed, 14 insertions(+) diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c index c9ac23b..e457ef7 100644 --- a/arch/arm/mach-tegra/fuse.c +++ b/arch/arm/mach-tegra/fuse.c @@ -34,6 +34,7 @@ #define FUSE_UID_HIGH 0x10c /* Tegra30 and later */ +#define FUSE_USB_CALIB 0x1f0 #define FUSE_VENDOR_CODE 0x200 #define FUSE_FAB_CODE 0x204 #define FUSE_LOT_CODE_0 0x208 @@ -154,6 +155,18 @@ u32 tegra_read_chipid(void) return readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804); } +u32 tegra_read_usb_calibration_data(void) +{ + u32 reg; + + tegra_fuse_enable_clk(); + reg = tegra_fuse_readl(FUSE_USB_CALIB); + tegra_fuse_disable_clk(); + + return reg; +} +EXPORT_SYMBOL(tegra_read_usb_calibration_data); + static void __init tegra20_fuse_init_randomness(void) { u32 randomness[2]; diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h index 95f611d..492dc95 100644 --- a/include/linux/tegra-soc.h +++ b/include/linux/tegra-soc.h @@ -18,5 +18,6 @@ #define __LINUX_TEGRA_SOC_H_ u32 tegra_read_chipid(void); +u32 tegra_read_usb_calibration_data(void); #endif /* __LINUX_TEGRA_SOC_H_ */ -- 1.9.1.423.g4596e3a