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GPIO: xilinx: Use __raw_readl/__raw_writel IO functions 

This driver can be used on Xilinx ARM Zynq platform
where in_be32/out_be32 functions are not implemented.
Use __raw_readl/__raw_writel functions which are
implemented on Microblaze and PowerPC.
For ARM readl/writel functions are used instead.

The correct way how to implement this is to detect
endians directly on IP. But for the gpio case
without interrupt connected(it means without
interrupt logic) there are just 2 registers
data and tristate where auto detection can't be done.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Michal Simek 2013-06-03 14:31:18 +02:00 committed by Linus Walleij
parent 74600ee017
commit cc090d61d1
1 changed files with 7 additions and 2 deletions
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9
drivers/gpio/gpio-xilinx.c
View File

@ -30,8 +30,13 @@
#define XGPIO_CHANNEL_OFFSET 0x8 #define XGPIO_CHANNEL_OFFSET 0x8
/* Read/Write access to the GPIO registers */ /* Read/Write access to the GPIO registers */
#define xgpio_readreg(offset) in_be32(offset) #ifdef CONFIG_ARCH_ZYNQ
#define xgpio_writereg(offset, val) out_be32(offset, val) # define xgpio_readreg(offset) readl(offset)
# define xgpio_writereg(offset, val) writel(val, offset)
#else
# define xgpio_readreg(offset) __raw_readl(offset)
# define xgpio_writereg(offset, val) __raw_writel(val, offset)
#endif
/** /**
* struct xgpio_instance - Stores information about GPIO device * struct xgpio_instance - Stores information about GPIO device