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gpio: davinci: Add support for multiple GPIO controllers 

Update GPIO driver to support Multiple GPIO controllers by updating
the base of subsequent GPIO chips with total of previous chips
gpio count so that gpio_add_chip gets unique numbers.

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 21:49:14 +05:30 committed by Linus Walleij
parent b5cf3fd827
commit 8e11047b8f
2 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpio/gpio-davinci.c
View File

@ -186,7 +186,7 @@ static int davinci_gpio_of_xlate(struct gpio_chip *gc,
static int davinci_gpio_probe(struct platform_device *pdev)
{
static int ctrl_num;
static int ctrl_num, bank_base;
int gpio, bank;
unsigned ngpio, nbank;
struct davinci_gpio_controller *chips;
@ -240,6 +240,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
chips->chip.set = davinci_gpio_set;
chips->chip.ngpio = ngpio;
chips->chip.base = bank_base;
#ifdef CONFIG_OF_GPIO
chips->chip.of_gpio_n_cells = 2;
@ -248,6 +249,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
chips->chip.of_node = dev->of_node;
#endif
spin_lock_init(&chips->lock);
bank_base += ngpio;
for (gpio = 0, bank = 0; gpio < ngpio; gpio += 32, bank++)
chips->regs[bank] = gpio_base + offset_array[bank];

1
include/linux/platform_data/gpio-davinci.h
View File

@ -42,6 +42,7 @@ struct davinci_gpio_controller {
void __iomem *regs[MAX_REGS_BANKS];
int gpio_unbanked;
unsigned int base_irq;
unsigned int base;
};
/*