Added a new function: ep93xx_chip_revision() which reads chip revision from the
sysconfig register.
Signed-off-by: Mika Westerberg <mika.westerb...@iki.fi>
---
arch/arm/mach-ep93xx/core.c | 26 ++++++++++++++++++++++++++
arch/arm/mach-ep93xx/include/mach/platform.h | 11 +++++++++++
2 files changed, 37 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 90fb591..2e496c9 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -64,6 +64,32 @@ void __init ep93xx_map_io(void)
iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
}
+/**
+ * ep93xx_chip_revision() - returns EP93xx chip revision
+ *
+ * Returns EP93xx chip revision number read from sysconfig register. Possible
+ * values can be one of the following:
+ *
+ * %EP93XX_CHIP_REV_A
+ * %EP93XX_CHIP_REV_B
+ * %EP93XX_CHIP_REV_C
+ * %EP93XX_CHIP_REV_D0
+ * %EP93XX_CHIP_REV_D1
+ * %EP93XX_CHIP_REV_E0
+ * %EP93XX_CHIP_REV_E1
+ * %EP93XX_CHIP_REV_E2
+ *
+ * and in future maybe something else. See also <mach/platform.h>.
+ */
+u8 ep93xx_chip_revision(void)
+{
+ u32 v;
+
+ v = __raw_readl(EP93XX_SYSCON_SYSCFG);
+ v &= EP93XX_SYSCON_SYSCFG_REV_MASK;
+ v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
+ return (u8)v;
+}
/*************************************************************************
* Timer handling for EP93xx
diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h
b/arch/arm/mach-ep93xx/include/mach/platform.h
index c6dc14d..8603837 100644
--- a/arch/arm/mach-ep93xx/include/mach/platform.h
+++ b/arch/arm/mach-ep93xx/include/mach/platform.h
@@ -33,6 +33,17 @@ static inline void ep93xx_devcfg_clear_bits(unsigned int
bits)
ep93xx_devcfg_set_clear(0x00, bits);
}
+#define EP93XX_CHIP_REV_A 0
+#define EP93XX_CHIP_REV_B 1
+#define EP93XX_CHIP_REV_C 2
+#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
+
+u8 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);
--
1.5.6.5
------------------------------------------------------------------------------
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