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path: root/drivers/gpio/gpio-omap.c
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Diffstat (limited to 'drivers/gpio/gpio-omap.c')
-rw-r--r--drivers/gpio/gpio-omap.c644
1 files changed, 275 insertions, 369 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 7f33024b6d83..16289bafa001 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -31,8 +31,6 @@
#define OMAP4_GPIO_DEBOUNCINGTIME_MASK 0xFF
-#define OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER BIT(2)
-
struct gpio_regs {
u32 irqenable1;
u32 irqenable2;
@@ -48,13 +46,6 @@ struct gpio_regs {
u32 debounce_en;
};
-struct gpio_bank;
-
-struct gpio_omap_funcs {
- void (*idle_enable_level_quirk)(struct gpio_bank *bank);
- void (*idle_disable_level_quirk)(struct gpio_bank *bank);
-};
-
struct gpio_bank {
struct list_head node;
void __iomem *base;
@@ -62,7 +53,6 @@ struct gpio_bank {
u32 non_wakeup_gpios;
u32 enabled_non_wakeup_gpios;
struct gpio_regs context;
- struct gpio_omap_funcs funcs;
u32 saved_datain;
u32 level_mask;
u32 toggle_mask;
@@ -83,8 +73,6 @@ struct gpio_bank {
int stride;
u32 width;
int context_loss_count;
- bool workaround_enabled;
- u32 quirks;
void (*set_dataout)(struct gpio_bank *bank, unsigned gpio, int enable);
void (*set_dataout_multiple)(struct gpio_bank *bank,
@@ -353,6 +341,22 @@ static void omap_clear_gpio_debounce(struct gpio_bank *bank, unsigned offset)
}
}
+/*
+ * Off mode wake-up capable GPIOs in bank(s) that are in the wakeup domain.
+ * See TRM section for GPIO for "Wake-Up Generation" for the list of GPIOs
+ * in wakeup domain. If bank->non_wakeup_gpios is not configured, assume none
+ * are capable waking up the system from off mode.
+ */
+static bool omap_gpio_is_off_wakeup_capable(struct gpio_bank *bank, u32 gpio_mask)
+{
+ u32 no_wake = bank->non_wakeup_gpios;
+
+ if (no_wake)
+ return !!(~no_wake & gpio_mask);
+
+ return false;
+}
+
static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
unsigned trigger)
{
@@ -363,10 +367,16 @@ static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
trigger & IRQ_TYPE_LEVEL_LOW);
omap_gpio_rmw(base, bank->regs->leveldetect1, gpio_bit,
trigger & IRQ_TYPE_LEVEL_HIGH);
+
+ /*
+ * We need the edge detection enabled for to allow the GPIO block
+ * to be woken from idle state. Set the appropriate edge detection
+ * in addition to the level detection.
+ */
omap_gpio_rmw(base, bank->regs->risingdetect, gpio_bit,
- trigger & IRQ_TYPE_EDGE_RISING);
+ trigger & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_LEVEL_HIGH));
omap_gpio_rmw(base, bank->regs->fallingdetect, gpio_bit,
- trigger & IRQ_TYPE_EDGE_FALLING);
+ trigger & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW));
bank->context.leveldetect0 =
readl_relaxed(bank->base + bank->regs->leveldetect0);
@@ -384,13 +394,7 @@ static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
}
/* This part needs to be executed always for OMAP{34xx, 44xx} */
- if (!bank->regs->irqctrl) {
- /* On omap24xx proceed only when valid GPIO bit is set */
- if (bank->non_wakeup_gpios) {
- if (!(bank->non_wakeup_gpios & gpio_bit))
- goto exit;
- }
-
+ if (!bank->regs->irqctrl && !omap_gpio_is_off_wakeup_capable(bank, gpio)) {
/*
* Log the edge gpio and manually trigger the IRQ
* after resume if the input level changes
@@ -403,7 +407,6 @@ static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
bank->enabled_non_wakeup_gpios &= ~gpio_bit;
}
-exit:
bank->level_mask =
readl_relaxed(bank->base + bank->regs->leveldetect0) |
readl_relaxed(bank->base + bank->regs->leveldetect1);
@@ -896,44 +899,6 @@ static void omap_gpio_unmask_irq(struct irq_data *d)
raw_spin_unlock_irqrestore(&bank->lock, flags);
}
-/*
- * Only edges can generate a wakeup event to the PRCM.
- *
- * Therefore, ensure any wake-up capable GPIOs have
- * edge-detection enabled before going idle to ensure a wakeup
- * to the PRCM is generated on a GPIO transition. (c.f. 34xx
- * NDA TRM 25.5.3.1)
- *
- * The normal values will be restored upon ->runtime_resume()
- * by writing back the values saved in bank->context.
- */
-static void __maybe_unused
-omap2_gpio_enable_level_quirk(struct gpio_bank *bank)
-{
- u32 wake_low, wake_hi;
-
- /* Enable additional edge detection for level gpios for idle */
- wake_low = bank->context.leveldetect0 & bank->context.wake_en;
- if (wake_low)
- writel_relaxed(wake_low | bank->context.fallingdetect,
- bank->base + bank->regs->fallingdetect);
-
- wake_hi = bank->context.leveldetect1 & bank->context.wake_en;
- if (wake_hi)
- writel_relaxed(wake_hi | bank->context.risingdetect,
- bank->base + bank->regs->risingdetect);
-}
-
-static void __maybe_unused
-omap2_gpio_disable_level_quirk(struct gpio_bank *bank)
-{
- /* Disable edge detection for level gpios after idle */
- writel_relaxed(bank->context.fallingdetect,
- bank->base + bank->regs->fallingdetect);
- writel_relaxed(bank->context.risingdetect,
- bank->base + bank->regs->risingdetect);
-}
-
/*---------------------------------------------------------------------*/
static int omap_mpuio_suspend_noirq(struct device *dev)
@@ -1251,203 +1216,70 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc)
return ret;
}
-static void omap_gpio_idle(struct gpio_bank *bank, bool may_lose_context);
-static void omap_gpio_unidle(struct gpio_bank *bank);
-
-static int gpio_omap_cpu_notifier(struct notifier_block *nb,
- unsigned long cmd, void *v)
+static void omap_gpio_init_context(struct gpio_bank *p)
{
- struct gpio_bank *bank;
- unsigned long flags;
+ struct omap_gpio_reg_offs *regs = p->regs;
+ void __iomem *base = p->base;
- bank = container_of(nb, struct gpio_bank, nb);
+ p->context.ctrl = readl_relaxed(base + regs->ctrl);
+ p->context.oe = readl_relaxed(base + regs->direction);
+ p->context.wake_en = readl_relaxed(base + regs->wkup_en);
+ p->context.leveldetect0 = readl_relaxed(base + regs->leveldetect0);
+ p->context.leveldetect1 = readl_relaxed(base + regs->leveldetect1);
+ p->context.risingdetect = readl_relaxed(base + regs->risingdetect);
+ p->context.fallingdetect = readl_relaxed(base + regs->fallingdetect);
+ p->context.irqenable1 = readl_relaxed(base + regs->irqenable);
+ p->context.irqenable2 = readl_relaxed(base + regs->irqenable2);
- raw_spin_lock_irqsave(&bank->lock, flags);
- switch (cmd) {
- case CPU_CLUSTER_PM_ENTER:
- if (bank->is_suspended)
- break;
- omap_gpio_idle(bank, true);
- break;
- case CPU_CLUSTER_PM_ENTER_FAILED:
- case CPU_CLUSTER_PM_EXIT:
- if (bank->is_suspended)
- break;
- omap_gpio_unidle(bank);
- break;
- }
- raw_spin_unlock_irqrestore(&bank->lock, flags);
+ if (regs->set_dataout && p->regs->clr_dataout)
+ p->context.dataout = readl_relaxed(base + regs->set_dataout);
+ else
+ p->context.dataout = readl_relaxed(base + regs->dataout);
- return NOTIFY_OK;
+ p->context_valid = true;
}
-static const struct of_device_id omap_gpio_match[];
-
-static int omap_gpio_probe(struct platform_device *pdev)
+static void omap_gpio_restore_context(struct gpio_bank *bank)
{
- struct device *dev = &pdev->dev;
- struct device_node *node = dev->of_node;
- const struct of_device_id *match;
- const struct omap_gpio_platform_data *pdata;
- struct resource *res;
- struct gpio_bank *bank;
- struct irq_chip *irqc;
- int ret;
-
- match = of_match_device(of_match_ptr(omap_gpio_match), dev);
-
- pdata = match ? match->data : dev_get_platdata(dev);
- if (!pdata)
- return -EINVAL;
-
- bank = devm_kzalloc(dev, sizeof(*bank), GFP_KERNEL);
- if (!bank)
- return -ENOMEM;
-
- irqc = devm_kzalloc(dev, sizeof(*irqc), GFP_KERNEL);
- if (!irqc)
- return -ENOMEM;
-
- irqc->irq_startup = omap_gpio_irq_startup,
- irqc->irq_shutdown = omap_gpio_irq_shutdown,
- irqc->irq_ack = omap_gpio_ack_irq,
- irqc->irq_mask = omap_gpio_mask_irq,
- irqc->irq_unmask = omap_gpio_unmask_irq,
- irqc->irq_set_type = omap_gpio_irq_type,
- irqc->irq_set_wake = omap_gpio_wake_enable,
- irqc->irq_bus_lock = omap_gpio_irq_bus_lock,
- irqc->irq_bus_sync_unlock = gpio_irq_bus_sync_unlock,
- irqc->name = dev_name(&pdev->dev);
- irqc->flags = IRQCHIP_MASK_ON_SUSPEND;
- irqc->parent_device = dev;
-
- bank->irq = platform_get_irq(pdev, 0);
- if (bank->irq <= 0) {
- if (!bank->irq)
- bank->irq = -ENXIO;
- if (bank->irq != -EPROBE_DEFER)
- dev_err(dev,
- "can't get irq resource ret=%d\n", bank->irq);
- return bank->irq;
- }
-
- bank->chip.parent = dev;
- bank->chip.owner = THIS_MODULE;
- bank->dbck_flag = pdata->dbck_flag;
- bank->quirks = pdata->quirks;
- bank->stride = pdata->bank_stride;
- bank->width = pdata->bank_width;
- bank->is_mpuio = pdata->is_mpuio;
- bank->non_wakeup_gpios = pdata->non_wakeup_gpios;
- bank->regs = pdata->regs;
-#ifdef CONFIG_OF_GPIO
- bank->chip.of_node = of_node_get(node);
-#endif
-
- if (node) {
- if (!of_property_read_bool(node, "ti,gpio-always-on"))
- bank->loses_context = true;
- } else {
- bank->loses_context = pdata->loses_context;
-
- if (bank->loses_context)
- bank->get_context_loss_count =
- pdata->get_context_loss_count;
- }
-
- if (bank->regs->set_dataout && bank->regs->clr_dataout) {
- bank->set_dataout = omap_set_gpio_dataout_reg;
- bank->set_dataout_multiple = omap_set_gpio_dataout_reg_multiple;
- } else {
- bank->set_dataout = omap_set_gpio_dataout_mask;
- bank->set_dataout_multiple =
- omap_set_gpio_dataout_mask_multiple;
- }
-
- if (bank->quirks & OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER) {
- bank->funcs.idle_enable_level_quirk =
- omap2_gpio_enable_level_quirk;
- bank->funcs.idle_disable_level_quirk =
- omap2_gpio_disable_level_quirk;
- }
-
- raw_spin_lock_init(&bank->lock);
- raw_spin_lock_init(&bank->wa_lock);
-
- /* Static mapping, never released */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- bank->base = devm_ioremap_resource(dev, res);
- if (IS_ERR(bank->base)) {
- return PTR_ERR(bank->base);
- }
-
- if (bank->dbck_flag) {
- bank->dbck = devm_clk_get(dev, "dbclk");
- if (IS_ERR(bank->dbck)) {
- dev_err(dev,
- "Could not get gpio dbck. Disable debounce\n");
- bank->dbck_flag = false;
- } else {
- clk_prepare(bank->dbck);
- }
- }
-
- platform_set_drvdata(pdev, bank);
-
- pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
-
- if (bank->is_mpuio)
- omap_mpuio_init(bank);
-
- omap_gpio_mod_init(bank);
-
- ret = omap_gpio_chip_init(bank, irqc);
- if (ret) {
- pm_runtime_put_sync(dev);
- pm_runtime_disable(dev);
- if (bank->dbck_flag)
- clk_unprepare(bank->dbck);
- return ret;
- }
-
- omap_gpio_show_rev(bank);
+ writel_relaxed(bank->context.wake_en,
+ bank->base + bank->regs->wkup_en);
+ writel_relaxed(bank->context.ctrl, bank->base + bank->regs->ctrl);
+ writel_relaxed(bank->context.leveldetect0,
+ bank->base + bank->regs->leveldetect0);
+ writel_relaxed(bank->context.leveldetect1,
+ bank->base + bank->regs->leveldetect1);
+ writel_relaxed(bank->context.risingdetect,
+ bank->base + bank->regs->risingdetect);
+ writel_relaxed(bank->context.fallingdetect,
+ bank->base + bank->regs->fallingdetect);
+ if (bank->regs->set_dataout && bank->regs->clr_dataout)
+ writel_relaxed(bank->context.dataout,
+ bank->base + bank->regs->set_dataout);
+ else
+ writel_relaxed(bank->context.dataout,
+ bank->base + bank->regs->dataout);
+ writel_relaxed(bank->context.oe, bank->base + bank->regs->direction);
- if (bank->funcs.idle_enable_level_quirk &&
- bank->funcs.idle_disable_level_quirk) {
- bank->nb.notifier_call = gpio_omap_cpu_notifier;
- cpu_pm_register_notifier(&bank->nb);
+ if (bank->dbck_enable_mask) {
+ writel_relaxed(bank->context.debounce, bank->base +
+ bank->regs->debounce);
+ writel_relaxed(bank->context.debounce_en,
+ bank->base + bank->regs->debounce_en);
}
- pm_runtime_put(dev);
-
- return 0;
-}
-
-static int omap_gpio_remove(struct platform_device *pdev)
-{
- struct gpio_bank *bank = platform_get_drvdata(pdev);
-
- if (bank->nb.notifier_call)
- cpu_pm_unregister_notifier(&bank->nb);
- list_del(&bank->node);
- gpiochip_remove(&bank->chip);
- pm_runtime_disable(&pdev->dev);
- if (bank->dbck_flag)
- clk_unprepare(bank->dbck);
-
- return 0;
+ writel_relaxed(bank->context.irqenable1,
+ bank->base + bank->regs->irqenable);
+ writel_relaxed(bank->context.irqenable2,
+ bank->base + bank->regs->irqenable2);
}
-static void omap_gpio_restore_context(struct gpio_bank *bank);
-
static void omap_gpio_idle(struct gpio_bank *bank, bool may_lose_context)
{
struct device *dev = bank->chip.parent;
- u32 l1 = 0, l2 = 0;
+ void __iomem *base = bank->base;
+ u32 nowake;
- if (bank->funcs.idle_enable_level_quirk)
- bank->funcs.idle_enable_level_quirk(bank);
+ bank->saved_datain = readl_relaxed(base + bank->regs->datain);
if (!bank->enabled_non_wakeup_gpios)
goto update_gpio_context_count;
@@ -1456,22 +1288,15 @@ static void omap_gpio_idle(struct gpio_bank *bank, bool may_lose_context)
goto update_gpio_context_count;
/*
- * If going to OFF, remove triggering for all
+ * If going to OFF, remove triggering for all wkup domain
* non-wakeup GPIOs. Otherwise spurious IRQs will be
* generated. See OMAP2420 Errata item 1.101.
*/
- bank->saved_datain = readl_relaxed(bank->base +
- bank->regs->datain);
- l1 = bank->context.fallingdetect;
- l2 = bank->context.risingdetect;
-
- l1 &= ~bank->enabled_non_wakeup_gpios;
- l2 &= ~bank->enabled_non_wakeup_gpios;
-
- writel_relaxed(l1, bank->base + bank->regs->fallingdetect);
- writel_relaxed(l2, bank->base + bank->regs->risingdetect);
-
- bank->workaround_enabled = true;
+ if (!bank->loses_context && bank->enabled_non_wakeup_gpios) {
+ nowake = bank->enabled_non_wakeup_gpios;
+ omap_gpio_rmw(base, bank->regs->fallingdetect, nowake, ~nowake);
+ omap_gpio_rmw(base, bank->regs->risingdetect, nowake, ~nowake);
+ }
update_gpio_context_count:
if (bank->get_context_loss_count)
@@ -1481,8 +1306,6 @@ update_gpio_context_count:
omap_gpio_dbck_disable(bank);
}
-static void omap_gpio_init_context(struct gpio_bank *p);
-
static void omap_gpio_unidle(struct gpio_bank *bank)
{
struct device *dev = bank->chip.parent;
@@ -1504,9 +1327,6 @@ static void omap_gpio_unidle(struct gpio_bank *bank)
omap_gpio_dbck_enable(bank);
- if (bank->funcs.idle_disable_level_quirk)
- bank->funcs.idle_disable_level_quirk(bank);
-
if (bank->loses_context) {
if (!bank->get_context_loss_count) {
omap_gpio_restore_context(bank);
@@ -1518,11 +1338,14 @@ static void omap_gpio_unidle(struct gpio_bank *bank)
return;
}
}
+ } else {
+ /* Restore changes done for OMAP2420 errata 1.101 */
+ writel_relaxed(bank->context.fallingdetect,
+ bank->base + bank->regs->fallingdetect);
+ writel_relaxed(bank->context.risingdetect,
+ bank->base + bank->regs->risingdetect);
}
- if (!bank->workaround_enabled)
- return;
-
l = readl_relaxed(bank->base + bank->regs->datain);
/*
@@ -1572,117 +1395,35 @@ static void omap_gpio_unidle(struct gpio_bank *bank)
writel_relaxed(old0, bank->base + bank->regs->leveldetect0);
writel_relaxed(old1, bank->base + bank->regs->leveldetect1);
}
-
- bank->workaround_enabled = false;
-}
-
-static void omap_gpio_init_context(struct gpio_bank *p)
-{
- struct omap_gpio_reg_offs *regs = p->regs;
- void __iomem *base = p->base;
-
- p->context.ctrl = readl_relaxed(base + regs->ctrl);
- p->context.oe = readl_relaxed(base + regs->direction);
- p->context.wake_en = readl_relaxed(base + regs->wkup_en);
- p->context.leveldetect0 = readl_relaxed(base + regs->leveldetect0);
- p->context.leveldetect1 = readl_relaxed(base + regs->leveldetect1);
- p->context.risingdetect = readl_relaxed(base + regs->risingdetect);
- p->context.fallingdetect = readl_relaxed(base + regs->fallingdetect);
- p->context.irqenable1 = readl_relaxed(base + regs->irqenable);
- p->context.irqenable2 = readl_relaxed(base + regs->irqenable2);
-
- if (regs->set_dataout && p->regs->clr_dataout)
- p->context.dataout = readl_relaxed(base + regs->set_dataout);
- else
- p->context.dataout = readl_relaxed(base + regs->dataout);
-
- p->context_valid = true;
-}
-
-static void omap_gpio_restore_context(struct gpio_bank *bank)
-{
- writel_relaxed(bank->context.wake_en,
- bank->base + bank->regs->wkup_en);
- writel_relaxed(bank->context.ctrl, bank->base + bank->regs->ctrl);
- writel_relaxed(bank->context.leveldetect0,
- bank->base + bank->regs->leveldetect0);
- writel_relaxed(bank->context.leveldetect1,
- bank->base + bank->regs->leveldetect1);
- writel_relaxed(bank->context.risingdetect,
- bank->base + bank->regs->risingdetect);
- writel_relaxed(bank->context.fallingdetect,
- bank->base + bank->regs->fallingdetect);
- if (bank->regs->set_dataout && bank->regs->clr_dataout)
- writel_relaxed(bank->context.dataout,
- bank->base + bank->regs->set_dataout);
- else
- writel_relaxed(bank->context.dataout,
- bank->base + bank->regs->dataout);
- writel_relaxed(bank->context.oe, bank->base + bank->regs->direction);
-
- if (bank->dbck_enable_mask) {
- writel_relaxed(bank->context.debounce, bank->base +
- bank->regs->debounce);
- writel_relaxed(bank->context.debounce_en,
- bank->base + bank->regs->debounce_en);
- }
-
- writel_relaxed(bank->context.irqenable1,
- bank->base + bank->regs->irqenable);
- writel_relaxed(bank->context.irqenable2,
- bank->base + bank->regs->irqenable2);
}
-static int __maybe_unused omap_gpio_runtime_suspend(struct device *dev)
+static int gpio_omap_cpu_notifier(struct notifier_block *nb,
+ unsigned long cmd, void *v)
{
- struct gpio_bank *bank = dev_get_drvdata(dev);
+ struct gpio_bank *bank;
unsigned long flags;
- int error = 0;
-
- raw_spin_lock_irqsave(&bank->lock, flags);
- /* Must be idled only by CPU_CLUSTER_PM_ENTER? */
- if (bank->irq_usage) {
- error = -EBUSY;
- goto unlock;
- }
- omap_gpio_idle(bank, true);
- bank->is_suspended = true;
-unlock:
- raw_spin_unlock_irqrestore(&bank->lock, flags);
-
- return error;
-}
-static int __maybe_unused omap_gpio_runtime_resume(struct device *dev)
-{
- struct gpio_bank *bank = dev_get_drvdata(dev);
- unsigned long flags;
- int error = 0;
+ bank = container_of(nb, struct gpio_bank, nb);
raw_spin_lock_irqsave(&bank->lock, flags);
- /* Must be unidled only by CPU_CLUSTER_PM_ENTER? */
- if (bank->irq_usage) {
- error = -EBUSY;
- goto unlock;
+ switch (cmd) {
+ case CPU_CLUSTER_PM_ENTER:
+ if (bank->is_suspended)
+ break;
+ omap_gpio_idle(bank, true);
+ break;
+ case CPU_CLUSTER_PM_ENTER_FAILED:
+ case CPU_CLUSTER_PM_EXIT:
+ if (bank->is_suspended)
+ break;
+ omap_gpio_unidle(bank);
+ break;
}
- omap_gpio_unidle(bank);
- bank->is_suspended = false;
-unlock:
raw_spin_unlock_irqrestore(&bank->lock, flags);
- return error;
+ return NOTIFY_OK;
}
-#ifdef CONFIG_ARCH_OMAP2PLUS
-static const struct dev_pm_ops gpio_pm_ops = {
- SET_RUNTIME_PM_OPS(omap_gpio_runtime_suspend, omap_gpio_runtime_resume,
- NULL)
-};
-#else
-static const struct dev_pm_ops gpio_pm_ops;
-#endif /* CONFIG_ARCH_OMAP2PLUS */
-
-#if defined(CONFIG_OF)
static struct omap_gpio_reg_offs omap2_gpio_regs = {
.revision = OMAP24XX_GPIO_REVISION,
.direction = OMAP24XX_GPIO_OE,
@@ -1729,11 +1470,6 @@ static struct omap_gpio_reg_offs omap4_gpio_regs = {
.fallingdetect = OMAP4_GPIO_FALLINGDETECT,
};
-/*
- * Note that omap2 does not currently support idle modes with context loss so
- * no need to add OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER quirk flag to save
- * and restore context.
- */
static const struct omap_gpio_platform_data omap2_pdata = {
.regs = &omap2_gpio_regs,
.bank_width = 32,
@@ -1744,14 +1480,12 @@ static const struct omap_gpio_platform_data omap3_pdata = {
.regs = &omap2_gpio_regs,
.bank_width = 32,
.dbck_flag = true,
- .quirks = OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER,
};
static const struct omap_gpio_platform_data omap4_pdata = {
.regs = &omap4_gpio_regs,
.bank_width = 32,
.dbck_flag = true,
- .quirks = OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER,
};
static const struct of_device_id omap_gpio_match[] = {
@@ -1770,15 +1504,187 @@ static const struct of_device_id omap_gpio_match[] = {
{ },
};
MODULE_DEVICE_TABLE(of, omap_gpio_match);
+
+static int omap_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ const struct of_device_id *match;
+ const struct omap_gpio_platform_data *pdata;
+ struct gpio_bank *bank;
+ struct irq_chip *irqc;
+ int ret;
+
+ match = of_match_device(of_match_ptr(omap_gpio_match), dev);
+
+ pdata = match ? match->data : dev_get_platdata(dev);
+ if (!pdata)
+ return -EINVAL;
+
+ bank = devm_kzalloc(dev, sizeof(*bank), GFP_KERNEL);
+ if (!bank)
+ return -ENOMEM;
+
+ irqc = devm_kzalloc(dev, sizeof(*irqc), GFP_KERNEL);
+ if (!irqc)
+ return -ENOMEM;
+
+ irqc->irq_startup = omap_gpio_irq_startup,
+ irqc->irq_shutdown = omap_gpio_irq_shutdown,
+ irqc->irq_ack = omap_gpio_ack_irq,
+ irqc->irq_mask = omap_gpio_mask_irq,
+ irqc->irq_unmask = omap_gpio_unmask_irq,
+ irqc->irq_set_type = omap_gpio_irq_type,
+ irqc->irq_set_wake = omap_gpio_wake_enable,
+ irqc->irq_bus_lock = omap_gpio_irq_bus_lock,
+ irqc->irq_bus_sync_unlock = gpio_irq_bus_sync_unlock,
+ irqc->name = dev_name(&pdev->dev);
+ irqc->flags = IRQCHIP_MASK_ON_SUSPEND;
+ irqc->parent_device = dev;
+
+ bank->irq = platform_get_irq(pdev, 0);
+ if (bank->irq <= 0) {
+ if (!bank->irq)
+ bank->irq = -ENXIO;
+ if (bank->irq != -EPROBE_DEFER)
+ dev_err(dev,
+ "can't get irq resource ret=%d\n", bank->irq);
+ return bank->irq;
+ }
+
+ bank->chip.parent = dev;
+ bank->chip.owner = THIS_MODULE;
+ bank->dbck_flag = pdata->dbck_flag;
+ bank->stride = pdata->bank_stride;
+ bank->width = pdata->bank_width;
+ bank->is_mpuio = pdata->is_mpuio;
+ bank->non_wakeup_gpios = pdata->non_wakeup_gpios;
+ bank->regs = pdata->regs;
+#ifdef CONFIG_OF_GPIO
+ bank->chip.of_node = of_node_get(node);
#endif
+ if (node) {
+ if (!of_property_read_bool(node, "ti,gpio-always-on"))
+ bank->loses_context = true;
+ } else {
+ bank->loses_context = pdata->loses_context;
+
+ if (bank->loses_context)
+ bank->get_context_loss_count =
+ pdata->get_context_loss_count;
+ }
+
+ if (bank->regs->set_dataout && bank->regs->clr_dataout) {
+ bank->set_dataout = omap_set_gpio_dataout_reg;
+ bank->set_dataout_multiple = omap_set_gpio_dataout_reg_multiple;
+ } else {
+ bank->set_dataout = omap_set_gpio_dataout_mask;
+ bank->set_dataout_multiple =
+ omap_set_gpio_dataout_mask_multiple;
+ }
+
+ raw_spin_lock_init(&bank->lock);
+ raw_spin_lock_init(&bank->wa_lock);
+
+ /* Static mapping, never released */
+ bank->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(bank->base)) {
+ return PTR_ERR(bank->base);
+ }
+
+ if (bank->dbck_flag) {
+ bank->dbck = devm_clk_get(dev, "dbclk");
+ if (IS_ERR(bank->dbck)) {
+ dev_err(dev,
+ "Could not get gpio dbck. Disable debounce\n");
+ bank->dbck_flag = false;
+ } else {
+ clk_prepare(bank->dbck);
+ }
+ }
+
+ platform_set_drvdata(pdev, bank);
+
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
+
+ if (bank->is_mpuio)
+ omap_mpuio_init(bank);
+
+ omap_gpio_mod_init(bank);
+
+ ret = omap_gpio_chip_init(bank, irqc);
+ if (ret) {
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
+ if (bank->dbck_flag)
+ clk_unprepare(bank->dbck);
+ return ret;
+ }
+
+ omap_gpio_show_rev(bank);
+
+ bank->nb.notifier_call = gpio_omap_cpu_notifier;
+ cpu_pm_register_notifier(&bank->nb);
+
+ pm_runtime_put(dev);
+
+ return 0;
+}
+
+static int omap_gpio_remove(struct platform_device *pdev)
+{
+ struct gpio_bank *bank = platform_get_drvdata(pdev);
+
+ cpu_pm_unregister_notifier(&bank->nb);
+ list_del(&bank->node);
+ gpiochip_remove(&bank->chip);
+ pm_runtime_disable(&pdev->dev);
+ if (bank->dbck_flag)
+ clk_unprepare(bank->dbck);
+
+ return 0;
+}
+
+static int __maybe_unused omap_gpio_runtime_suspend(struct device *dev)
+{
+ struct gpio_bank *bank = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&bank->lock, flags);
+ omap_gpio_idle(bank, true);
+ bank->is_suspended = true;
+ raw_spin_unlock_irqrestore(&bank->lock, flags);
+
+ return 0;
+}
+
+static int __maybe_unused omap_gpio_runtime_resume(struct device *dev)
+{
+ struct gpio_bank *bank = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&bank->lock, flags);
+ omap_gpio_unidle(bank);
+ bank->is_suspended = false;
+ raw_spin_unlock_irqrestore(&bank->lock, flags);
+
+ return 0;
+}
+
+static const struct dev_pm_ops gpio_pm_ops = {
+ SET_RUNTIME_PM_OPS(omap_gpio_runtime_suspend, omap_gpio_runtime_resume,
+ NULL)
+};
+
static struct platform_driver omap_gpio_driver = {
.probe = omap_gpio_probe,
.remove = omap_gpio_remove,
.driver = {
.name = "omap_gpio",
.pm = &gpio_pm_ops,
- .of_match_table = of_match_ptr(omap_gpio_match),
+ .of_match_table = omap_gpio_match,
},
};