diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-10-09 18:58:45 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-10-15 01:18:57 +0200 |
| commit | a33912061607979380e070af63a9adeef0a16246 (patch) | |
| tree | a545d2122da57371dbde20ae00ea6e938cfa8de3 /drivers/gpio | |
| parent | a752fbb4b4644d09964e76c69ccd1acc700e907a (diff) | |
| download | linux-a33912061607979380e070af63a9adeef0a16246.tar.gz linux-a33912061607979380e070af63a9adeef0a16246.tar.bz2 linux-a33912061607979380e070af63a9adeef0a16246.zip | |
gpio: lynxpoint: 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: 7b1e889436a1 ("gpio: lynxpoint: 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-lynxpoint.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index 6bb9741ad036..082cd143f430 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -294,8 +294,9 @@ static struct irq_chip lp_irqchip = { .flags = IRQCHIP_SKIP_SET_WAKE, }; -static void lp_gpio_irq_init_hw(struct lp_gpio *lg) +static int lp_gpio_irq_init_hw(struct gpio_chip *chip) { + struct lp_gpio *lg = gpiochip_get_data(chip); unsigned long reg; unsigned base; @@ -307,6 +308,8 @@ static void lp_gpio_irq_init_hw(struct lp_gpio *lg) reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT); outl(0xffffffff, reg); } + + return 0; } static int lp_gpio_probe(struct platform_device *pdev) @@ -364,6 +367,7 @@ static int lp_gpio_probe(struct platform_device *pdev) girq = &gc->irq; girq->chip = &lp_irqchip; + girq->init_hw = lp_gpio_irq_init_hw; girq->parent_handler = lp_gpio_irq_handler; girq->num_parents = 1; girq->parents = devm_kcalloc(&pdev->dev, girq->num_parents, @@ -374,8 +378,6 @@ static int lp_gpio_probe(struct platform_device *pdev) girq->parents[0] = (unsigned)irq_rc->start; girq->default_type = IRQ_TYPE_NONE; girq->handler = handle_simple_irq; - - lp_gpio_irq_init_hw(lg); } ret = devm_gpiochip_add_data(dev, gc, lg); |