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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2019-10-09 18:23:27 +0300
committerLinus Walleij <linus.walleij@linaro.org>2019-10-15 01:19:01 +0200
commit4c87540940cbc7ddbe9674087919c605fd5c2ef1 (patch)
tree12983dc6c97c0b06fc11d4d1cf828b3380df2965 /drivers/gpio
parenta33912061607979380e070af63a9adeef0a16246 (diff)
gpio: merrifield: Move hardware initialization to callback
The driver wants to initialize related registers before IRQ chip will be added. That's why move it to a corresponding callback. It also fixes the NULL pointer dereference. Fixes: 8f86a5b4ad67 ("gpio: merrifield: Pass irqchip when adding gpiochip") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-merrifield.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/gpio/gpio-merrifield.c b/drivers/gpio/gpio-merrifield.c
index 9596024c9161..2f1e9da81c1e 100644
--- a/drivers/gpio/gpio-merrifield.c
+++ b/drivers/gpio/gpio-merrifield.c
@@ -362,8 +362,9 @@ static void mrfld_irq_handler(struct irq_desc *desc)
chained_irq_exit(irqchip, desc);
}
-static void mrfld_irq_init_hw(struct mrfld_gpio *priv)
+static int mrfld_irq_init_hw(struct gpio_chip *chip)
{
+ struct mrfld_gpio *priv = gpiochip_get_data(chip);
void __iomem *reg;
unsigned int base;
@@ -375,6 +376,8 @@ static void mrfld_irq_init_hw(struct mrfld_gpio *priv)
reg = gpio_reg(&priv->chip, base, GFER);
writel(0, reg);
}
+
+ return 0;
}
static const char *mrfld_gpio_get_pinctrl_dev_name(struct mrfld_gpio *priv)
@@ -447,6 +450,7 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
girq = &priv->chip.irq;
girq->chip = &mrfld_irqchip;
+ girq->init_hw = mrfld_irq_init_hw;
girq->parent_handler = mrfld_irq_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(&pdev->dev, girq->num_parents,
@@ -459,8 +463,6 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_bad_irq;
- mrfld_irq_init_hw(priv);
-
pci_set_drvdata(pdev, priv);
retval = devm_gpiochip_add_data(&pdev->dev, &priv->chip, priv);
if (retval) {