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ARM: 5998/1: ep93xx: added chip revision reading function

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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>
This commit is contained in:
Mika Westerberg 2010-03-27 12:05:14 +01:00 committed by Russell King
parent b370e082e7
commit 99e6a23adf
2 changed files with 22 additions and 0 deletions
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14
arch/arm/mach-ep93xx/core.c
View File

@ -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

8
arch/arm/mach-ep93xx/include/mach/platform.h
View File

@ -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);