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gpio: graniterapids: Check if GPIO line can be used for IRQs

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GPIO line can only be used as interrupt if its INTSEL register is
programmed by the BIOS.

Cc: stable@vger.kernel.org
Signed-off-by: Alan Borzeszkowski <alan.borzeszkowski@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20241204070415.1034449-7-mika.westerberg@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Alan Borzeszkowski 2024-12-04 09:04:14 +02:00 committed by Bartosz Golaszewski
parent 0588504d28
commit c0ec4890d6
1 changed files with 12 additions and 3 deletions
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15
drivers/gpio/gpio-graniterapids.c
View File

@ -39,6 +39,7 @@
#define GNR_CFG_DW_HOSTSW_MODE BIT(27)
#define GNR_CFG_DW_RX_MASK GENMASK(23, 22)
#define GNR_CFG_DW_INTSEL_MASK GENMASK(21, 14)
#define GNR_CFG_DW_RX_DISABLE FIELD_PREP(GNR_CFG_DW_RX_MASK, 2)
#define GNR_CFG_DW_RX_EDGE FIELD_PREP(GNR_CFG_DW_RX_MASK, 1)
#define GNR_CFG_DW_RX_LEVEL FIELD_PREP(GNR_CFG_DW_RX_MASK, 0)
@ -227,10 +228,18 @@ static void gnr_gpio_irq_unmask(struct irq_data *d)
static int gnr_gpio_irq_set_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
irq_hw_number_t pin = irqd_to_hwirq(d);
u32 mask = GNR_CFG_DW_RX_MASK;
struct gnr_gpio *priv = gpiochip_get_data(gc);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
u32 reg;
u32 set;
/* Allow interrupts only if Interrupt Select field is non-zero */
reg = readl(gnr_gpio_get_padcfg_addr(priv, hwirq));
if (!(reg & GNR_CFG_DW_INTSEL_MASK)) {
dev_dbg(gc->parent, "GPIO %lu cannot be used as IRQ", hwirq);
return -EPERM;
}
/* Falling edge and level low triggers not supported by the GPIO controller */
switch (type) {
case IRQ_TYPE_NONE:
@ -248,7 +257,7 @@ static int gnr_gpio_irq_set_type(struct irq_data *d, unsigned int type)
return -EINVAL;
}
return gnr_gpio_configure_line(gc, pin, mask, set);
return gnr_gpio_configure_line(gc, hwirq, GNR_CFG_DW_RX_MASK, set);
}
static const struct irq_chip gnr_gpio_irq_chip = {