[PATCH v2 08/10] gpio: Add gpio driver for Actions OWL S900 SoC

Am 21.02.2018 um 20:13 schrieb Andy Shevchenko:

On Wed, Feb 21, 2018 at 6:00 PM, Manivannan Sadhasivam
[off-list ref] wrote:

quoted

Add gpio driver for Actions Semi OWL family S900 SoC. Set of registers
controlling the gpio shares the same register range with pinctrl block.

GPIO registers are organized as 6 banks and each bank controls the
maximum of 32 gpios.

quoted

+static void owl_gpio_set_reg(void __iomem *base, unsigned int pin, int flag)
+{
+       u32 val;
+
+       if (flag) {
+               val = readl(base);
+               val |= BIT(pin);
+               writel(val, base);
+       } else {
+               val = readl(base);
+               val &= ~BIT(pin);
+               writel(val, base);
+       }
+}

Why not to use the same pattern as below?

readl()
if ()
 ...
else
...
writel()

?

And shouldn't that be readl_relaxed() and writel_relaxed()?

Regards,
Andreas

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