Merge tag 'gpio-fixes-v3.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij:
- Fix a potential bit wrap issue in the Timberdale driver
- Fix up the buffer allocation size in the 74x164 driver
- Set the value in direction_output() right in the mvebu driver
- Return proper error codes for invalid GPIOs
- Fix an off-mode bug for the OMAP
- Don't initialize the mask_cach on the mvebu driver
* tag 'gpio-fixes-v3.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
GPIO: mvebu-gpio: Don't initialize the mask_cache
gpio/omap: fix off-mode bug: clear debounce settings on free/reset
gpiolib: Don't return -EPROBE_DEFER to sysfs, or for invalid gpios
gpio: mvebu: correctly set the value in direction_output()
gpio-74x164: Fix buffer allocation size
gpio-timberdale: fix a potential wrapping issue
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index ed3e551..f05e542 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -153,7 +153,7 @@
}
chip->gpio_chip.ngpio = GEN_74X164_NUMBER_GPIOS * chip->registers;
- chip->buffer = devm_kzalloc(&spi->dev, chip->gpio_chip.ngpio, GFP_KERNEL);
+ chip->buffer = devm_kzalloc(&spi->dev, chip->registers, GFP_KERNEL);
if (!chip->buffer) {
ret = -ENOMEM;
goto exit_destroy;
diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 7a87412..cf7afb9 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -244,6 +244,8 @@
if (ret)
return ret;
+ mvebu_gpio_set(chip, pin, value);
+
spin_lock_irqsave(&mvchip->lock, flags);
u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
u &= ~(1 << pin);
@@ -644,7 +646,7 @@
ct->handler = handle_edge_irq;
ct->chip.name = mvchip->chip.label;
- irq_setup_generic_chip(gc, IRQ_MSK(ngpios), IRQ_GC_INIT_MASK_CACHE,
+ irq_setup_generic_chip(gc, IRQ_MSK(ngpios), 0,
IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
/* Setup irq domain on top of the generic chip. */
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 94cbc84..d335af1 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -251,6 +251,40 @@
}
}
+/**
+ * _clear_gpio_debounce - clear debounce settings for a gpio
+ * @bank: the gpio bank we're acting upon
+ * @gpio: the gpio number on this @gpio
+ *
+ * If a gpio is using debounce, then clear the debounce enable bit and if
+ * this is the only gpio in this bank using debounce, then clear the debounce
+ * time too. The debounce clock will also be disabled when calling this function
+ * if this is the only gpio in the bank using debounce.
+ */
+static void _clear_gpio_debounce(struct gpio_bank *bank, unsigned gpio)
+{
+ u32 gpio_bit = GPIO_BIT(bank, gpio);
+
+ if (!bank->dbck_flag)
+ return;
+
+ if (!(bank->dbck_enable_mask & gpio_bit))
+ return;
+
+ bank->dbck_enable_mask &= ~gpio_bit;
+ bank->context.debounce_en &= ~gpio_bit;
+ __raw_writel(bank->context.debounce_en,
+ bank->base + bank->regs->debounce_en);
+
+ if (!bank->dbck_enable_mask) {
+ bank->context.debounce = 0;
+ __raw_writel(bank->context.debounce, bank->base +
+ bank->regs->debounce);
+ clk_disable(bank->dbck);
+ bank->dbck_enabled = false;
+ }
+}
+
static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio,
unsigned trigger)
{
@@ -539,6 +573,7 @@
_set_gpio_irqenable(bank, gpio, 0);
_clear_gpio_irqstatus(bank, gpio);
_set_gpio_triggering(bank, GPIO_INDEX(bank, gpio), IRQ_TYPE_NONE);
+ _clear_gpio_debounce(bank, gpio);
}
/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
diff --git a/drivers/gpio/gpio-timberdale.c b/drivers/gpio/gpio-timberdale.c
index 031c6ad..1a3e2b9 100644
--- a/drivers/gpio/gpio-timberdale.c
+++ b/drivers/gpio/gpio-timberdale.c
@@ -116,7 +116,7 @@
unsigned long flags;
spin_lock_irqsave(&tgpio->lock, flags);
- tgpio->last_ier &= ~(1 << offset);
+ tgpio->last_ier &= ~(1UL << offset);
iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER);
spin_unlock_irqrestore(&tgpio->lock, flags);
}
@@ -128,7 +128,7 @@
unsigned long flags;
spin_lock_irqsave(&tgpio->lock, flags);
- tgpio->last_ier |= 1 << offset;
+ tgpio->last_ier |= 1UL << offset;
iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER);
spin_unlock_irqrestore(&tgpio->lock, flags);
}
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 5d6c71e..1c8d9e3 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -623,9 +623,11 @@
*/
status = gpio_request(gpio, "sysfs");
- if (status < 0)
+ if (status < 0) {
+ if (status == -EPROBE_DEFER)
+ status = -ENODEV;
goto done;
-
+ }
status = gpio_export(gpio, true);
if (status < 0)
gpio_free(gpio);
@@ -1191,8 +1193,10 @@
spin_lock_irqsave(&gpio_lock, flags);
- if (!gpio_is_valid(gpio))
+ if (!gpio_is_valid(gpio)) {
+ status = -EINVAL;
goto done;
+ }
desc = &gpio_desc[gpio];
chip = desc->chip;
if (chip == NULL)