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path: root/drivers/gpio/gpio-davinci.c
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Diffstat (limited to 'drivers/gpio/gpio-davinci.c')
-rw-r--r--drivers/gpio/gpio-davinci.c127
1 files changed, 73 insertions, 54 deletions
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index bb47de3daafa..446df4ece915 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -63,11 +63,13 @@ static inline int __davinci_direction(struct gpio_chip *chip,
unsigned offset, bool out, int value)
{
struct davinci_gpio_controller *d = gpiochip_get_data(chip);
- struct davinci_gpio_regs __iomem *g = d->regs;
+ struct davinci_gpio_regs __iomem *g;
unsigned long flags;
u32 temp;
- u32 mask = 1 << offset;
+ int bank = offset / 32;
+ u32 mask = __gpio_mask(offset);
+ g = d->regs[bank];
spin_lock_irqsave(&d->lock, flags);
temp = readl_relaxed(&g->dir);
if (out) {
@@ -103,9 +105,12 @@ davinci_direction_out(struct gpio_chip *chip, unsigned offset, int value)
static int davinci_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct davinci_gpio_controller *d = gpiochip_get_data(chip);
- struct davinci_gpio_regs __iomem *g = d->regs;
+ struct davinci_gpio_regs __iomem *g;
+ int bank = offset / 32;
- return !!((1 << offset) & readl_relaxed(&g->in_data));
+ g = d->regs[bank];
+
+ return !!(__gpio_mask(offset) & readl_relaxed(&g->in_data));
}
/*
@@ -115,9 +120,13 @@ static void
davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct davinci_gpio_controller *d = gpiochip_get_data(chip);
- struct davinci_gpio_regs __iomem *g = d->regs;
+ struct davinci_gpio_regs __iomem *g;
+ int bank = offset / 32;
- writel_relaxed((1 << offset), value ? &g->set_data : &g->clr_data);
+ g = d->regs[bank];
+
+ writel_relaxed(__gpio_mask(offset),
+ value ? &g->set_data : &g->clr_data);
}
static struct davinci_gpio_platform_data *
@@ -165,7 +174,7 @@ static int davinci_gpio_of_xlate(struct gpio_chip *gc,
if (gpiospec->args[0] > pdata->ngpio)
return -EINVAL;
- if (gc != &chips[gpiospec->args[0] / 32].chip)
+ if (gc != &chips->chip)
return -EINVAL;
if (flags)
@@ -177,11 +186,11 @@ static int davinci_gpio_of_xlate(struct gpio_chip *gc,
static int davinci_gpio_probe(struct platform_device *pdev)
{
- int i, base;
+ static int ctrl_num;
+ int gpio, bank;
unsigned ngpio, nbank;
struct davinci_gpio_controller *chips;
struct davinci_gpio_platform_data *pdata;
- struct davinci_gpio_regs __iomem *regs;
struct device *dev = &pdev->dev;
struct resource *res;
char label[MAX_LABEL_SIZE];
@@ -220,38 +229,30 @@ static int davinci_gpio_probe(struct platform_device *pdev)
if (IS_ERR(gpio_base))
return PTR_ERR(gpio_base);
- for (i = 0, base = 0; base < ngpio; i++, base += 32) {
- snprintf(label, MAX_LABEL_SIZE, "davinci_gpio.%d", i);
- chips[i].chip.label = devm_kstrdup(dev, label, GFP_KERNEL);
- if (!chips[i].chip.label)
+ snprintf(label, MAX_LABEL_SIZE, "davinci_gpio.%d", ctrl_num++);
+ chips->chip.label = devm_kstrdup(dev, label, GFP_KERNEL);
+ if (!chips->chip.label)
return -ENOMEM;
- chips[i].chip.direction_input = davinci_direction_in;
- chips[i].chip.get = davinci_gpio_get;
- chips[i].chip.direction_output = davinci_direction_out;
- chips[i].chip.set = davinci_gpio_set;
+ chips->chip.direction_input = davinci_direction_in;
+ chips->chip.get = davinci_gpio_get;
+ chips->chip.direction_output = davinci_direction_out;
+ chips->chip.set = davinci_gpio_set;
- chips[i].chip.base = base;
- chips[i].chip.ngpio = ngpio - base;
- if (chips[i].chip.ngpio > 32)
- chips[i].chip.ngpio = 32;
+ chips->chip.ngpio = ngpio;
#ifdef CONFIG_OF_GPIO
- chips[i].chip.of_gpio_n_cells = 2;
- chips[i].chip.of_xlate = davinci_gpio_of_xlate;
- chips[i].chip.parent = dev;
- chips[i].chip.of_node = dev->of_node;
+ chips->chip.of_gpio_n_cells = 2;
+ chips->chip.of_xlate = davinci_gpio_of_xlate;
+ chips->chip.parent = dev;
+ chips->chip.of_node = dev->of_node;
#endif
- spin_lock_init(&chips[i].lock);
-
- regs = gpio_base + offset_array[i];
- if (!regs)
- return -ENXIO;
- chips[i].regs = regs;
+ spin_lock_init(&chips->lock);
- gpiochip_add_data(&chips[i].chip, &chips[i]);
- }
+ for (gpio = 0, bank = 0; gpio < ngpio; gpio += 32, bank++)
+ chips->regs[bank] = gpio_base + offset_array[bank];
+ gpiochip_add_data(&chips->chip, chips);
platform_set_drvdata(pdev, chips);
davinci_gpio_irq_setup(pdev);
return 0;
@@ -312,16 +313,19 @@ static struct irq_chip gpio_irqchip = {
static void gpio_irq_handler(struct irq_desc *desc)
{
- unsigned int irq = irq_desc_get_irq(desc);
struct davinci_gpio_regs __iomem *g;
u32 mask = 0xffff;
+ int bank_num;
struct davinci_gpio_controller *d;
+ struct davinci_gpio_irq_data *irqdata;
- d = (struct davinci_gpio_controller *)irq_desc_get_handler_data(desc);
- g = (struct davinci_gpio_regs __iomem *)d->regs;
+ irqdata = (struct davinci_gpio_irq_data *)irq_desc_get_handler_data(desc);
+ bank_num = irqdata->bank_num;
+ g = irqdata->regs;
+ d = irqdata->chip;
/* we only care about one bank */
- if (irq & 1)
+ if ((bank_num % 2) == 1)
mask <<= 16;
/* temporarily mask (level sensitive) parent IRQ */
@@ -329,6 +333,7 @@ static void gpio_irq_handler(struct irq_desc *desc)
while (1) {
u32 status;
int bit;
+ irq_hw_number_t hw_irq;
/* ack any irqs */
status = readl_relaxed(&g->intstat) & mask;
@@ -341,9 +346,13 @@ static void gpio_irq_handler(struct irq_desc *desc)
while (status) {
bit = __ffs(status);
status &= ~BIT(bit);
+ /* Max number of gpios per controller is 144 so
+ * hw_irq will be in [0..143]
+ */
+ hw_irq = (bank_num / 2) * 32 + bit;
+
generic_handle_irq(
- irq_find_mapping(d->irq_domain,
- d->chip.base + bit));
+ irq_find_mapping(d->irq_domain, hw_irq));
}
}
chained_irq_exit(irq_desc_get_chip(desc), desc);
@@ -355,7 +364,7 @@ static int gpio_to_irq_banked(struct gpio_chip *chip, unsigned offset)
struct davinci_gpio_controller *d = gpiochip_get_data(chip);
if (d->irq_domain)
- return irq_create_mapping(d->irq_domain, d->chip.base + offset);
+ return irq_create_mapping(d->irq_domain, offset);
else
return -ENXIO;
}
@@ -369,7 +378,7 @@ static int gpio_to_irq_unbanked(struct gpio_chip *chip, unsigned offset)
* can provide direct-mapped IRQs to AINTC (up to 32 GPIOs).
*/
if (offset < d->gpio_unbanked)
- return d->gpio_irq + offset;
+ return d->base_irq + offset;
else
return -ENODEV;
}
@@ -382,7 +391,7 @@ static int gpio_irq_type_unbanked(struct irq_data *data, unsigned trigger)
d = (struct davinci_gpio_controller *)irq_data_get_irq_handler_data(data);
g = (struct davinci_gpio_regs __iomem *)d->regs;
- mask = __gpio_mask(data->irq - d->gpio_irq);
+ mask = __gpio_mask(data->irq - d->base_irq);
if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
return -EINVAL;
@@ -401,7 +410,7 @@ davinci_gpio_irq_map(struct irq_domain *d, unsigned int irq,
{
struct davinci_gpio_controller *chips =
(struct davinci_gpio_controller *)d->host_data;
- struct davinci_gpio_regs __iomem *g = chips[hw / 32].regs;
+ struct davinci_gpio_regs __iomem *g = chips->regs[hw / 32];
irq_set_chip_and_handler_name(irq, &gpio_irqchip, handle_simple_irq,
"davinci_gpio");
@@ -459,6 +468,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
struct irq_domain *irq_domain = NULL;
const struct of_device_id *match;
struct irq_chip *irq_chip;
+ struct davinci_gpio_irq_data *irqdata;
gpio_get_irq_chip_cb_t gpio_get_irq_chip;
/*
@@ -514,10 +524,8 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
* IRQs, while the others use banked IRQs, would need some setup
* tweaks to recognize hardware which can do that.
*/
- for (gpio = 0, bank = 0; gpio < ngpio; bank++, gpio += 32) {
- chips[bank].chip.to_irq = gpio_to_irq_banked;
- chips[bank].irq_domain = irq_domain;
- }
+ chips->chip.to_irq = gpio_to_irq_banked;
+ chips->irq_domain = irq_domain;
/*
* AINTC can handle direct/unbanked IRQs for GPIOs, with the GPIO
@@ -526,9 +534,9 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
*/
if (pdata->gpio_unbanked) {
/* pass "bank 0" GPIO IRQs to AINTC */
- chips[0].chip.to_irq = gpio_to_irq_unbanked;
- chips[0].gpio_irq = bank_irq;
- chips[0].gpio_unbanked = pdata->gpio_unbanked;
+ chips->chip.to_irq = gpio_to_irq_unbanked;
+ chips->base_irq = bank_irq;
+ chips->gpio_unbanked = pdata->gpio_unbanked;
binten = GENMASK(pdata->gpio_unbanked / 16, 0);
/* AINTC handles mask/unmask; GPIO handles triggering */
@@ -538,14 +546,14 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
irq_chip->irq_set_type = gpio_irq_type_unbanked;
/* default trigger: both edges */
- g = chips[0].regs;
+ g = chips->regs[0];
writel_relaxed(~0, &g->set_falling);
writel_relaxed(~0, &g->set_rising);
/* set the direct IRQs up to use that irqchip */
for (gpio = 0; gpio < pdata->gpio_unbanked; gpio++, irq++) {
irq_set_chip(irq, irq_chip);
- irq_set_handler_data(irq, &chips[gpio / 32]);
+ irq_set_handler_data(irq, chips);
irq_set_status_flags(irq, IRQ_TYPE_EDGE_BOTH);
}
@@ -561,7 +569,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
* There are register sets for 32 GPIOs. 2 banks of 16
* GPIOs are covered by each set of registers hence divide by 2
*/
- g = chips[bank / 2].regs;
+ g = chips->regs[bank / 2];
writel_relaxed(~0, &g->clr_falling);
writel_relaxed(~0, &g->clr_rising);
@@ -570,8 +578,19 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
* gpio irqs. Pass the irq bank's corresponding controller to
* the chained irq handler.
*/
+ irqdata = devm_kzalloc(&pdev->dev,
+ sizeof(struct
+ davinci_gpio_irq_data),
+ GFP_KERNEL);
+ if (!irqdata)
+ return -ENOMEM;
+
+ irqdata->regs = g;
+ irqdata->bank_num = bank;
+ irqdata->chip = chips;
+
irq_set_chained_handler_and_data(bank_irq, gpio_irq_handler,
- &chips[gpio / 32]);
+ irqdata);
binten |= BIT(bank);
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-22 11:52:33 +0300