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authorMika Westerberg <mika.westerberg@iki.fi>2010-03-27 14:05:14 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-04-14 14:19:24 +0400
commit99e6a23adfadc2da2006f3715c4332c3bf502c07 (patch)
tree5e97ad3f9e7935c7afa885cb8b09913d20097a11 /arch/arm/mach-ep93xx
parentb370e082e7c4bd47195b2ec117ceeadd9286d8c0 (diff)
downloadlinux-99e6a23adfadc2da2006f3715c4332c3bf502c07.tar.xz
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 <mika.westerberg@iki.fi> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-ep93xx')
-rw-r--r--arch/arm/mach-ep93xx/core.c14
-rw-r--r--arch/arm/mach-ep93xx/include/mach/platform.h8
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 5b1d836c2f05..8d3f77e9fa86 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 <mach/platform.h> 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 c6dc14dbca18..b663390b4d87 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);