[PATCH 06/33] ARM: pxa/lubbock: add GPIO driver for LUB_MISC_WR register

Russell King
2016-08-29T10:24:36Z

Add a gpio driver for the lubbock miscellaneous write IO register so we
can take advantage of subsystems modelled around gpiolib, rather than
having to provide platform specific callbacks.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
arch/arm/mach-pxa/Kconfig | 1 +
arch/arm/mach-pxa/lubbock.c | 24 ++++++++++++++++--------
2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index cd894d69e766..e7577803a911 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -29,6 +29,7 @@ config MACH_PXA3XX_DT

config ARCH_LUBBOCK
bool "Intel DBPXA250 Development Platform (aka Lubbock)"
+ select GPIO_REG
select PXA25x
select SA1111

diff --git a/arch/arm/mach-pxa/lubbock.c b/arch/arm/mach-pxa/lubbock.c
index 7245f3359564..e974d1eb0f88 100644
--- a/arch/arm/mach-pxa/lubbock.c
+++ b/arch/arm/mach-pxa/lubbock.c
@@ -13,6 +13,7 @@
*/
#include <linux/clkdev.h>
#include <linux/gpio.h>
+#include <linux/gpio-reg.h>
#include <linux/gpio/machine.h>
#include <linux/module.h>
#include <linux/kernel.h>
@@ -110,20 +111,18 @@ static unsigned long lubbock_pin_config[] __initdata = {
};

#define LUB_HEXLED __LUB_REG(LUBBOCK_FPGA_PHYS + 0x010)
-#define LUB_MISC_WR __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)

void lubbock_set_hexled(uint32_t value)
{
LUB_HEXLED = value;
}

+static struct gpio_chip *lubbock_misc_wr_gc;
+
void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
{
- unsigned long flags;
-
- local_irq_save(flags);
- LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
- local_irq_restore(flags);
+ unsigned long m = mask, v = set;
+ lubbock_misc_wr_gc->set_multiple(lubbock_misc_wr_gc, &m, &v);
}
EXPORT_SYMBOL(lubbock_set_misc_wr);

@@ -443,9 +442,9 @@ static void lubbock_irda_transceiver_mode(struct device *dev, int mode)

local_irq_save(flags);
if (mode & IR_SIRMODE) {
- LUB_MISC_WR &= ~(1 << 4);
+ lubbock_set_misc_wr(BIT(4), 0);
} else if (mode & IR_FIRMODE) {
- LUB_MISC_WR |= 1 << 4;
+ lubbock_set_misc_wr(BIT(4), BIT(4));
}
pxa2xx_transceiver_mode(dev, mode);
local_irq_restore(flags);
@@ -463,6 +462,15 @@ static void __init lubbock_init(void)

pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));

+ lubbock_misc_wr_gc = gpio_reg_init(NULL, (void *)&LUB_MISC_WR,
+ -1, 16, "lubbock", 0, LUB_MISC_WR,
+ NULL);
+ if (IS_ERR(lubbock_misc_wr_gc)) {
+ pr_err("Lubbock: unable to register lubbock GPIOs: %ld\n",
+ PTR_ERR(lubbock_misc_wr_gc));
+ lubbock_misc_wr_gc = NULL;
+ }
+
pxa_set_ffuart_info(NULL);
pxa_set_btuart_info(NULL);
pxa_set_stuart_info(NULL);
--
2.1.0