dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

MIPS: BCM63xx: Fix GPIO set/get for BCM6345 

On BCM6345, the register offsets for the set/get GPIO registers is wrong.
Use the same logic as the one present in arch/mips/bcm63xx/irq.c to
define the correct gpio_out_low_reg value when support for BCM6345
is compiled in.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3010/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Florian Fainelli 2011-11-16 19:11:21 +01:00 committed by Ralf Baechle
parent e1c96c8620
commit 92d9ae2026
2 changed files with 37 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
arch/mips/bcm63xx/gpio.c
View File

@ -4,7 +4,7 @@
* for more details.
*
* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
* Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
* Copyright (C) 2008-2011 Florian Fainelli <florian@openwrt.org>
*/
#include <linux/kernel.h>
@ -18,6 +18,34 @@
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>
#ifndef BCMCPU_RUNTIME_DETECT
#define gpio_out_low_reg GPIO_DATA_LO_REG
#ifdef CONFIG_BCM63XX_CPU_6345
#ifdef gpio_out_low_reg
#undef gpio_out_low_reg
#define gpio_out_low_reg GPIO_DATA_LO_REG_6345
#endif /* gpio_out_low_reg */
#endif /* CONFIG_BCM63XX_CPU_6345 */
static inline void bcm63xx_gpio_out_low_reg_init(void)
{
}
#else /* ! BCMCPU_RUNTIME_DETECT */
static u32 gpio_out_low_reg;
static void bcm63xx_gpio_out_low_reg_init(void)
{
switch (bcm63xx_get_cpu_id()) {
case BCM6345_CPU_ID:
gpio_out_low_reg = GPIO_DATA_LO_REG_6345;
break;
default:
gpio_out_low_reg = GPIO_DATA_LO_REG;
break;
}
}
#endif /* ! BCMCPU_RUNTIME_DETECT */
static DEFINE_SPINLOCK(bcm63xx_gpio_lock);
static u32 gpio_out_low, gpio_out_high;
@ -33,7 +61,7 @@ static void bcm63xx_gpio_set(struct gpio_chip *chip,
BUG();
if (gpio < 32) {
reg = GPIO_DATA_LO_REG;
reg = gpio_out_low_reg;
mask = 1 << gpio;
v = &gpio_out_low;
} else {
@ -60,7 +88,7 @@ static int bcm63xx_gpio_get(struct gpio_chip *chip, unsigned gpio)
BUG();
if (gpio < 32) {
reg = GPIO_DATA_LO_REG;
reg = gpio_out_low_reg;
mask = 1 << gpio;
} else {
reg = GPIO_DATA_HI_REG;
@ -125,8 +153,11 @@ static struct gpio_chip bcm63xx_gpio_chip = {
int __init bcm63xx_gpio_init(void)
{
gpio_out_low = bcm_gpio_readl(GPIO_DATA_LO_REG);
gpio_out_high = bcm_gpio_readl(GPIO_DATA_HI_REG);
bcm63xx_gpio_out_low_reg_init();
gpio_out_low = bcm_gpio_readl(gpio_out_low_reg);
if (!BCMCPU_IS_6345())
gpio_out_high = bcm_gpio_readl(GPIO_DATA_HI_REG);
bcm63xx_gpio_chip.ngpio = bcm63xx_gpio_count();
pr_info("registering %d GPIOs\n", bcm63xx_gpio_chip.ngpio);

1
arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
View File

@ -437,6 +437,7 @@
#define GPIO_CTL_LO_REG 0x4
#define GPIO_DATA_HI_REG 0x8
#define GPIO_DATA_LO_REG 0xC
#define GPIO_DATA_LO_REG_6345 0x8
/* GPIO mux registers and constants */
#define GPIO_MODE_REG 0x18