summaryrefslogtreecommitdiff
path: root/drivers/gpio/cs5535-gpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpio/cs5535-gpio.c')
-rw-r--r--drivers/gpio/cs5535-gpio.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/gpio/cs5535-gpio.c b/drivers/gpio/cs5535-gpio.c
index d3e55a0ae92b..815d98b2c1ba 100644
--- a/drivers/gpio/cs5535-gpio.c
+++ b/drivers/gpio/cs5535-gpio.c
@@ -15,6 +15,7 @@
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/cs5535.h>
+#include <asm/msr.h>
#define DRV_NAME "cs5535-gpio"
#define GPIO_BAR 1
@@ -144,6 +145,57 @@ int cs5535_gpio_isset(unsigned offset, unsigned int reg)
}
EXPORT_SYMBOL_GPL(cs5535_gpio_isset);
+int cs5535_gpio_set_irq(unsigned group, unsigned irq)
+{
+ uint32_t lo, hi;
+
+ if (group > 7 || irq > 15)
+ return -EINVAL;
+
+ rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
+
+ lo &= ~(0xF << (group * 4));
+ lo |= (irq & 0xF) << (group * 4);
+
+ wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cs5535_gpio_set_irq);
+
+void cs5535_gpio_setup_event(unsigned offset, int pair, int pme)
+{
+ struct cs5535_gpio_chip *chip = &cs5535_gpio_chip;
+ uint32_t shift = (offset % 8) * 4;
+ unsigned long flags;
+ uint32_t val;
+
+ if (offset >= 24)
+ offset = GPIO_MAP_W;
+ else if (offset >= 16)
+ offset = GPIO_MAP_Z;
+ else if (offset >= 8)
+ offset = GPIO_MAP_Y;
+ else
+ offset = GPIO_MAP_X;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ val = inl(chip->base + offset);
+
+ /* Clear whatever was there before */
+ val &= ~(0xF << shift);
+
+ /* Set the new value */
+ val |= ((pair & 7) << shift);
+
+ /* Set the PME bit if this is a PME event */
+ if (pme)
+ val |= (1 << (shift + 3));
+
+ outl(val, chip->base + offset);
+ spin_unlock_irqrestore(&chip->lock, flags);
+}
+EXPORT_SYMBOL_GPL(cs5535_gpio_setup_event);
+
/*
* Generic gpio_chip API support.
*/