[RFC PATCH 05/10] ARM: tegra: Export function to read USB calibration data
From: Andrew Bresticker <hidden>
Date: 2014-05-15 00:35:11
Also in:
linux-devicetree, linux-tegra, lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
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 <redacted> --- 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