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SubjectRe: [PATCH 2/2] gpio: davinci: Do not assume continuous IRQ numbering
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On 06/06/2018 04:18 AM, Keerthy wrote:
> Currently the driver assumes that the interrupts are continuous
> and does platform_get_irq only once and assumes the rest are continuous,
> instead call platform_get_irq for all the interrupts and store them
> in an array for later use.
>
> Signed-off-by: Keerthy <j-keerthy@ti.com>
> ---
>
> Tested for GPIO Interrupts on da850-lcdk and keystone-k2g-evm boards.
>
> drivers/gpio/gpio-davinci.c | 49 ++++++++++++++++++++++++++++++---------------
> 1 file changed, 33 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
> index 861f35b..375578c 100644
> --- a/drivers/gpio/gpio-davinci.c
> +++ b/drivers/gpio/gpio-davinci.c
> @@ -42,6 +42,7 @@ struct davinci_gpio_regs {
>
> #define BINTEN 0x8 /* GPIO Interrupt Per-Bank Enable Register */
> #define MAX_LABEL_SIZE 20
> +#define MAX_INT_PER_BANK 32
>
> static void __iomem *gpio_base;
> static unsigned int offset_array[5] = {0x10, 0x38, 0x60, 0x88, 0xb0};
> @@ -55,7 +56,7 @@ static inline struct davinci_gpio_regs __iomem *irq2regs(struct irq_data *d)
> return g;
> }
>
> -static int davinci_gpio_irq_setup(struct platform_device *pdev, int bank_irq);
> +static int davinci_gpio_irq_setup(struct platform_device *pdev, int *bank_irq);
>
> /*--------------------------------------------------------------------------*/
>
> @@ -168,7 +169,8 @@ static int davinci_gpio_probe(struct platform_device *pdev)
> {
> static int ctrl_num, bank_base;
> int gpio, bank, ret = 0;
> - unsigned ngpio, nbank, bank_irq;
> + unsigned int ngpio, nbank, nirq;
> + int bank_irq[MAX_INT_PER_BANK], i;
> struct davinci_gpio_controller *chips;
> struct davinci_gpio_platform_data *pdata;
> struct device *dev = &pdev->dev;
> @@ -197,6 +199,16 @@ static int davinci_gpio_probe(struct platform_device *pdev)
> if (WARN_ON(ARCH_NR_GPIOS < ngpio))
> ngpio = ARCH_NR_GPIOS;
>
> + /*
> + * If there are unbanked interrupts then the number of
> + * interrupts is equal to number of gpios else all are banked so
> + * number of interrupts is equal to number of banks(each with 16 gpios)
> + */
> + if (pdata->gpio_unbanked)
> + nirq = pdata->gpio_unbanked;
> + else
> + nirq = DIV_ROUND_UP(ngpio, 16);
> +
> nbank = DIV_ROUND_UP(ngpio, 32);
> chips = devm_kzalloc(dev,
> nbank * sizeof(struct davinci_gpio_controller),
> @@ -209,10 +221,13 @@ static int davinci_gpio_probe(struct platform_device *pdev)
> if (IS_ERR(gpio_base))
> return PTR_ERR(gpio_base);
>
> - bank_irq = platform_get_irq(pdev, 0);
> - if (bank_irq < 0) {
> - dev_dbg(dev, "IRQ not populated\n");
> - return bank_irq;
> + for (i = 0; i < nirq; i++) {
> + bank_irq[i] = platform_get_irq(pdev, i);
> + if (bank_irq[i] < 0) {
> + dev_info(dev, "IRQ not populated, err = %d\n",
> + bank_irq[i]);
> + return bank_irq[i];
> + }
> }
>
> snprintf(label, MAX_LABEL_SIZE, "davinci_gpio.%d", ctrl_num++);
> @@ -458,7 +473,7 @@ static struct irq_chip *keystone_gpio_get_irq_chip(unsigned int irq)
> * (dm6446) can be set appropriately for GPIOV33 pins.
> */
>
> -static int davinci_gpio_irq_setup(struct platform_device *pdev, int bank_irq)
> +static int davinci_gpio_irq_setup(struct platform_device *pdev, int *bank_irq)
> {
> unsigned gpio, bank;
> int irq;
> @@ -492,6 +507,7 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev, int bank_irq)
> dev_err(dev, "Error %ld getting gpio clock\n", PTR_ERR(clk));
> return PTR_ERR(clk);
> }
> +
> ret = clk_prepare_enable(clk);
> if (ret)
> return ret;
> @@ -531,12 +547,12 @@ static int davinci_gpio_irq_setup(struct platform_device *pdev, int bank_irq)
> if (pdata->gpio_unbanked) {
> /* pass "bank 0" GPIO IRQs to AINTC */
> chips->chip.to_irq = gpio_to_irq_unbanked;
> - chips->base_irq = bank_irq;
> + chips->base_irq = bank_irq[0];


i think, you need to update gpio_to_irq_unbanked() also, which
probably would require to save array of irqs.


and gpio_irq_type_unbanked()



[...]
>

--
regards,
-grygorii

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