From 99e6a23adfadc2da2006f3715c4332c3bf502c07 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Sat, 27 Mar 2010 12:05:14 +0100 Subject: [PATCH] ARM: 5998/1: ep93xx: added chip revision reading function Added a new function: ep93xx_chip_revision() which reads chip revision from the sysconfig register. Signed-off-by: Mika Westerberg Acked-by: H Hartley Sweeten Signed-off-by: Russell King --- arch/arm/mach-ep93xx/core.c | 14 ++++++++++++++ arch/arm/mach-ep93xx/include/mach/platform.h | 8 ++++++++ 2 files changed, 22 insertions(+) diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index 5b1d836..8d3f77e 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -222,6 +222,20 @@ void ep93xx_devcfg_set_clear(unsigned int set_bits, unsigned int clear_bits) } EXPORT_SYMBOL(ep93xx_devcfg_set_clear); +/** + * ep93xx_chip_revision() - returns the EP93xx chip revision + * + * See for more information. + */ +unsigned int ep93xx_chip_revision(void) +{ + unsigned int v; + + v = __raw_readl(EP93XX_SYSCON_SYSCFG); + v &= EP93XX_SYSCON_SYSCFG_REV_MASK; + v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT; + return v; +} /************************************************************************* * EP93xx peripheral handling diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h index c6dc14d..b663390 100644 --- a/arch/arm/mach-ep93xx/include/mach/platform.h +++ b/arch/arm/mach-ep93xx/include/mach/platform.h @@ -33,6 +33,14 @@ static inline void ep93xx_devcfg_clear_bits(unsigned int bits) ep93xx_devcfg_set_clear(0x00, bits); } +#define EP93XX_CHIP_REV_D0 3 +#define EP93XX_CHIP_REV_D1 4 +#define EP93XX_CHIP_REV_E0 5 +#define EP93XX_CHIP_REV_E1 6 +#define EP93XX_CHIP_REV_E2 7 + +unsigned int ep93xx_chip_revision(void); + void ep93xx_register_eth(struct ep93xx_eth_data *data, int copy_addr); void ep93xx_register_i2c(struct i2c_gpio_platform_data *data, struct i2c_board_info *devices, int num); -- 2.7.4