From f41cd3c2876bd31e7c71908548ae3c7a5b7ff649 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 19 Nov 2013 13:34:56 +0100 Subject: gpio: lock adnp IRQs when enabling them This uses the new API for tagging GPIO lines as in use by IRQs. This enforces a few semantic checks on how the underlying GPIO line is used. Only compile tested on the lpc32xx. ChangeLog v2->v3: - Switch to using the startup()/shutdown() callbacks again. Still satisfy the mask/unmask semantics. ChangeLog v1->v2: - Use the .enable() callback from the irq_chip - Call .unmask() from the .enable() callback to satisfy semantics. Cc: Lars Poeschel Cc: Thierry Reding Signed-off-by: Linus Walleij --- drivers/gpio/gpio-adnp.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c index b204033acaeb..a7b471977dc5 100644 --- a/drivers/gpio/gpio-adnp.c +++ b/drivers/gpio/gpio-adnp.c @@ -408,6 +408,27 @@ static void adnp_irq_bus_unlock(struct irq_data *data) mutex_unlock(&adnp->irq_lock); } +static unsigned int adnp_irq_startup(struct irq_data *data) +{ + struct adnp *adnp = irq_data_get_irq_chip_data(data); + + if (gpio_lock_as_irq(&adnp->gpio, data->hwirq)) + dev_err(adnp->gpio.dev, + "unable to lock HW IRQ %lu for IRQ\n", + data->hwirq); + /* Satisfy the .enable semantics by unmasking the line */ + adnp_irq_unmask(data); + return 0; +} + +static void adnp_irq_shutdown(struct irq_data *data) +{ + struct adnp *adnp = irq_data_get_irq_chip_data(data); + + adnp_irq_mask(data); + gpio_unlock_as_irq(&adnp->gpio, data->hwirq); +} + static struct irq_chip adnp_irq_chip = { .name = "gpio-adnp", .irq_mask = adnp_irq_mask, @@ -415,6 +436,8 @@ static struct irq_chip adnp_irq_chip = { .irq_set_type = adnp_irq_set_type, .irq_bus_lock = adnp_irq_bus_lock, .irq_bus_sync_unlock = adnp_irq_bus_unlock, + .irq_startup = adnp_irq_startup, + .irq_shutdown = adnp_irq_shutdown, }; static int adnp_irq_map(struct irq_domain *domain, unsigned int irq, -- cgit v1.2.3 From db6b3ad1772e0e0e82c52d6337378e79da2effad Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 19 Nov 2013 14:14:50 +0100 Subject: gpio: bcm-kona: lock IRQs when starting them This uses the new API for tagging GPIO lines as in use by IRQs. This enforces a few semantic checks on how the underlying GPIO line is used. Cc: Christian Daudt Cc: Grygorii Strashko Reviewed-by: Markus Mayer Tested-by: Markus Mayer Reviewed-by: Javier Martinez Canillas Signed-off-by: Linus Walleij --- drivers/gpio/gpio-bcm-kona.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c index 72c927dc3be1..3437414eaef2 100644 --- a/drivers/gpio/gpio-bcm-kona.c +++ b/drivers/gpio/gpio-bcm-kona.c @@ -449,12 +449,34 @@ static void bcm_kona_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) chained_irq_exit(chip, desc); } +static unsigned int bcm_kona_gpio_irq_startup(struct irq_data *d) +{ + struct bcm_kona_gpio *kona_gpio = irq_data_get_irq_chip_data(d); + + if (gpio_lock_as_irq(&kona_gpio->gpio_chip, d->hwirq)) + dev_err(kona_gpio->gpio_chip.dev, + "unable to lock HW IRQ %lu for IRQ\n", + d->hwirq); + bcm_kona_gpio_irq_unmask(d); + return 0; +} + +static void bcm_kona_gpio_irq_shutdown(struct irq_data *d) +{ + struct bcm_kona_gpio *kona_gpio = irq_data_get_irq_chip_data(d); + + bcm_kona_gpio_irq_mask(d); + gpio_unlock_as_irq(&kona_gpio->gpio_chip, d->hwirq); +} + static struct irq_chip bcm_gpio_irq_chip = { .name = "bcm-kona-gpio", .irq_ack = bcm_kona_gpio_irq_ack, .irq_mask = bcm_kona_gpio_irq_mask, .irq_unmask = bcm_kona_gpio_irq_unmask, .irq_set_type = bcm_kona_gpio_irq_set_type, + .irq_startup = bcm_kona_gpio_irq_startup, + .irq_shutdown = bcm_kona_gpio_irq_shutdown, }; static struct __initconst of_device_id bcm_kona_gpio_of_match[] = { -- cgit v1.2.3 From 0dc616236961e39e0fefecb4301f9e4632e4a511 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 20 Nov 2013 10:16:54 +0100 Subject: gpio: em: lock IRQs when starting them This uses the new API for tagging GPIO lines as in use by IRQs. This enforces a few semantic checks on how the underlying GPIO line is used. Also assign the gpio_chip.dev pointer to be used for error messages. ChangeLog v1->v2: - Satisfy implicit semantics by calling .enable and .disable callbacks in the startup/shutdown callbacks. Cc: Ian Molton Cc: Simon Horman Acked-by: Magnus Damm Signed-off-by: Linus Walleij --- drivers/gpio/gpio-em.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c index ec190361bf2e..1cc53516e8b4 100644 --- a/drivers/gpio/gpio-em.c +++ b/drivers/gpio/gpio-em.c @@ -99,6 +99,27 @@ static void em_gio_irq_enable(struct irq_data *d) em_gio_write(p, GIO_IEN, BIT(irqd_to_hwirq(d))); } +static unsigned int em_gio_irq_startup(struct irq_data *d) +{ + struct em_gio_priv *p = irq_data_get_irq_chip_data(d); + + if (gpio_lock_as_irq(&p->gpio_chip, irqd_to_hwirq(d))) + dev_err(p->gpio_chip.dev, + "unable to lock HW IRQ %lu for IRQ\n", + irqd_to_hwirq(d)); + em_gio_irq_enable(d); + return 0; +} + +static void em_gio_irq_shutdown(struct irq_data *d) +{ + struct em_gio_priv *p = irq_data_get_irq_chip_data(d); + + em_gio_irq_disable(d); + gpio_unlock_as_irq(&p->gpio_chip, irqd_to_hwirq(d)); +} + + #define GIO_ASYNC(x) (x + 8) static unsigned char em_gio_sense_table[IRQ_TYPE_SENSE_MASK + 1] = { @@ -328,6 +349,7 @@ static int em_gio_probe(struct platform_device *pdev) gpio_chip->request = em_gio_request; gpio_chip->free = em_gio_free; gpio_chip->label = name; + gpio_chip->dev = &pdev->dev; gpio_chip->owner = THIS_MODULE; gpio_chip->base = pdata->gpio_base; gpio_chip->ngpio = pdata->number_of_pins; @@ -339,6 +361,8 @@ static int em_gio_probe(struct platform_device *pdev) irq_chip->irq_enable = em_gio_irq_enable; irq_chip->irq_disable = em_gio_irq_disable; irq_chip->irq_set_type = em_gio_irq_set_type; + irq_chip->irq_startup = em_gio_irq_startup; + irq_chip->irq_shutdown = em_gio_irq_shutdown; irq_chip->flags = IRQCHIP_SKIP_SET_WAKE; p->irq_domain = irq_domain_add_simple(pdev->dev.of_node, -- cgit v1.2.3 From aa6baa7e374dccbec619dcdd1291bc529a008051 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 20 Nov 2013 15:24:32 +0100 Subject: gpio: intel-mid: lock IRQs when starting them This uses the new API for tagging GPIO lines as in use by IRQs. This enforces a few semantic checks on how the underlying GPIO line is used. ChangeLog v1->v2: - Explicitly call the - empty - mask/unmask functions from the startup/shutdown hooks. These are currently empty, but maybe they will not be that forever, so better be safe than sorry. Acked-by: David Cohen Signed-off-by: Linus Walleij --- drivers/gpio/gpio-intel-mid.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-intel-mid.c b/drivers/gpio/gpio-intel-mid.c index be803af658ac..039de0e6cf16 100644 --- a/drivers/gpio/gpio-intel-mid.c +++ b/drivers/gpio/gpio-intel-mid.c @@ -235,11 +235,33 @@ static void intel_mid_irq_mask(struct irq_data *d) { } +static unsigned int intel_mid_irq_startup(struct irq_data *d) +{ + struct intel_mid_gpio *priv = irq_data_get_irq_chip_data(d); + + if (gpio_lock_as_irq(&priv->chip, irqd_to_hwirq(d))) + dev_err(priv->chip.dev, + "unable to lock HW IRQ %lu for IRQ\n", + irqd_to_hwirq(d)); + intel_mid_irq_unmask(d); + return 0; +} + +static void intel_mid_irq_shutdown(struct irq_data *d) +{ + struct intel_mid_gpio *priv = irq_data_get_irq_chip_data(d); + + intel_mid_irq_mask(d); + gpio_unlock_as_irq(&priv->chip, irqd_to_hwirq(d)); +} + static struct irq_chip intel_mid_irqchip = { .name = "INTEL_MID-GPIO", .irq_mask = intel_mid_irq_mask, .irq_unmask = intel_mid_irq_unmask, .irq_set_type = intel_mid_irq_type, + .irq_startup = intel_mid_irq_startup, + .irq_shutdown = intel_mid_irq_shutdown, }; static const struct intel_mid_gpio_ddata gpio_lincroft = { @@ -418,6 +440,7 @@ static int intel_gpio_probe(struct pci_dev *pdev, priv->reg_base = pcim_iomap_table(pdev)[0]; priv->chip.label = dev_name(&pdev->dev); + priv->chip.dev = &pdev->dev; priv->chip.request = intel_gpio_request; priv->chip.direction_input = intel_gpio_direction_input; priv->chip.direction_output = intel_gpio_direction_output; -- cgit v1.2.3 From eb7cce1ea96b6399672abce787598f6e7a4352c3 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 20 Nov 2013 15:36:53 +0100 Subject: gpio: lynxpoint: lock IRQs when starting them This uses the new API for tagging GPIO lines as in use by IRQs. This enforces a few semantic checks on how the underlying GPIO line is used. Cc: Mathias Nyman Tested-by: Mika Westerberg Signed-off-by: Linus Walleij --- drivers/gpio/gpio-lynxpoint.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index a0804740a0b7..70831e4b2c8b 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -301,6 +301,26 @@ static void lp_irq_disable(struct irq_data *d) spin_unlock_irqrestore(&lg->lock, flags); } +static unsigned int lp_irq_startup(struct irq_data *d) +{ + struct lp_gpio *lg = irq_data_get_irq_chip_data(d); + + if (gpio_lock_as_irq(&lg->chip, irqd_to_hwirq(d))) + dev_err(lg->chip.dev, + "unable to lock HW IRQ %lu for IRQ\n", + irqd_to_hwirq(d)); + lp_irq_enable(d); + return 0; +} + +static void lp_irq_shutdown(struct irq_data *d) +{ + struct lp_gpio *lg = irq_data_get_irq_chip_data(d); + + lp_irq_disable(d); + gpio_unlock_as_irq(&lg->chip, irqd_to_hwirq(d)); +} + static struct irq_chip lp_irqchip = { .name = "LP-GPIO", .irq_mask = lp_irq_mask, @@ -308,6 +328,8 @@ static struct irq_chip lp_irqchip = { .irq_enable = lp_irq_enable, .irq_disable = lp_irq_disable, .irq_set_type = lp_irq_type, + .irq_startup = lp_irq_startup, + .irq_shutdown = lp_irq_shutdown, .flags = IRQCHIP_SKIP_SET_WAKE, }; -- cgit v1.2.3