diff options
| author | Thomas Petazzoni <thomas.petazzoni@bootlin.com> | 2019-01-16 10:31:58 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-01-21 14:05:42 +0100 |
| commit | 5c4fee63c5ed8133e5a6011787a614c7dbc80c82 (patch) | |
| tree | 824c10d6112cfb2994b91a48e13140713139c08f /drivers/gpio/gpio-pca953x.c | |
| parent | 7341fa7a6bf3f8dc7466bdd340dc5a61efab8902 (diff) | |
| download | linux-5c4fee63c5ed8133e5a6011787a614c7dbc80c82.tar.gz | |
gpio: pca953x: use a per instance irq_chip structure
When a system has two PCA953x GPIO expanders, the kernel complains with: gpio gpiochip2: (0-0021): detected irqchip that is shared with multiple gpiochips: please fix the driver. Indeed, there is a single instance of "struct irq_chip" that gets re-used for both PCA953x instance. This commit moves the "struct irq_chip" to be part of the "struct pca953x_chip", so that we have one "struct irq_chip" per PCA953X instance. As part of this, the name of the irq_chip is also made different on a per-instance basis, now using the dev_name() of the I2C device. This changes what is visible in /proc/interrupts. Before: 47: 0 0 pca953x 10 Edge e0100000.sdhci cd 48: 0 0 pca953x 6 Edge e0101000.sdhci cd After: 47: 0 0 0-0020 10 Edge e0100000.sdhci cd 48: 2 0 0-0020 6 Edge e0101000.sdhci cd Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-pca953x.c')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index 73ceea72fc0a..83d45f00e4d0 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -150,6 +150,7 @@ struct pca953x_chip { u8 irq_stat[MAX_BANK]; u8 irq_trig_raise[MAX_BANK]; u8 irq_trig_fall[MAX_BANK]; + struct irq_chip irq_chip; #endif struct i2c_client *client; @@ -594,16 +595,6 @@ static void pca953x_irq_shutdown(struct irq_data *d) chip->irq_trig_fall[d->hwirq / BANK_SZ] &= ~mask; } -static struct irq_chip pca953x_irq_chip = { - .name = "pca953x", - .irq_mask = pca953x_irq_mask, - .irq_unmask = pca953x_irq_unmask, - .irq_bus_lock = pca953x_irq_bus_lock, - .irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock, - .irq_set_type = pca953x_irq_set_type, - .irq_shutdown = pca953x_irq_shutdown, -}; - static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending) { u8 cur_stat[MAX_BANK]; @@ -699,6 +690,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, int irq_base) { struct i2c_client *client = chip->client; + struct irq_chip *irq_chip = &chip->irq_chip; int reg_direction[MAX_BANK]; int ret, i; @@ -737,7 +729,15 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, return ret; } - ret = gpiochip_irqchip_add_nested(&chip->gpio_chip, &pca953x_irq_chip, + irq_chip->name = dev_name(&chip->client->dev); + irq_chip->irq_mask = pca953x_irq_mask; + irq_chip->irq_unmask = pca953x_irq_unmask; + irq_chip->irq_bus_lock = pca953x_irq_bus_lock; + irq_chip->irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock; + irq_chip->irq_set_type = pca953x_irq_set_type; + irq_chip->irq_shutdown = pca953x_irq_shutdown; + + ret = gpiochip_irqchip_add_nested(&chip->gpio_chip, irq_chip, irq_base, handle_simple_irq, IRQ_TYPE_NONE); if (ret) { @@ -746,8 +746,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, return ret; } - gpiochip_set_nested_irqchip(&chip->gpio_chip, &pca953x_irq_chip, - client->irq); + gpiochip_set_nested_irqchip(&chip->gpio_chip, irq_chip, client->irq); return 0; } |