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gpio: davinci: Remove gpio2regs function 

gpio2regs is written making an assumption that driver supports only
one instance of gpio controller. Removing this and adding a generic
array so as to support multiple instances of gpio controllers.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Keerthy 2017-01-17 21:49:11 +05:30 committed by Linus Walleij
parent fbc2a294f2
commit 8f7cf8c657
1 changed files with 11 additions and 24 deletions
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35
drivers/gpio/gpio-davinci.c
View File

@ -43,25 +43,7 @@ typedef struct irq_chip *(*gpio_get_irq_chip_cb_t)(unsigned int irq);
#define MAX_LABEL_SIZE 20
static void __iomem *gpio_base;
static struct davinci_gpio_regs __iomem *gpio2regs(unsigned gpio)
{
void __iomem *ptr;
if (gpio < 32 * 1)
ptr = gpio_base + 0x10;
else if (gpio < 32 * 2)
ptr = gpio_base + 0x38;
else if (gpio < 32 * 3)
ptr = gpio_base + 0x60;
else if (gpio < 32 * 4)
ptr = gpio_base + 0x88;
else if (gpio < 32 * 5)
ptr = gpio_base + 0xb0;
else
ptr = NULL;
return ptr;
}
static unsigned int offset_array[5] = {0x10, 0x38, 0x60, 0x88, 0xb0};
static inline struct davinci_gpio_regs __iomem *irq2regs(struct irq_data *d)
{
@ -262,7 +244,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
#endif
spin_lock_init(&chips[i].lock);
regs = gpio2regs(base);
regs = gpio_base + offset_array[i];
if (!regs)
return -ENXIO;
chips[i].regs = regs;
@ -417,7 +399,9 @@ static int
davinci_gpio_irq_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
struct davinci_gpio_regs __iomem *g = gpio2regs(hw);
struct davinci_gpio_controller *chips =
(struct davinci_gpio_controller *)d->host_data;
struct davinci_gpio_regs __iomem *g = chips[hw / 32].regs;
irq_set_chip_and_handler_name(irq, &gpio_irqchip, handle_simple_irq,
"davinci_gpio");
@ -554,7 +538,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
irq_chip->irq_set_type = gpio_irq_type_unbanked;
/* default trigger: both edges */
g = gpio2regs(0);
g = chips[0].regs;
writel_relaxed(~0, &g->set_falling);
writel_relaxed(~0, &g->set_rising);
@ -573,8 +557,11 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev)
* then chain through our own handler.
*/
for (gpio = 0, bank = 0; gpio < ngpio; bank++, bank_irq++, gpio += 16) {
/* disabled by default, enabled only as needed */
g = gpio2regs(gpio);
/* disabled by default, enabled only as needed
* 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;
writel_relaxed(~0, &g->clr_falling);
writel_relaxed(~0, &g->clr_rising);