On Wednesday 11 January 2017 04:34 PM, Linus Walleij wrote:
On Wed, Jan 4, 2017 at 9:26 AM, Keerthy <j-keerthy@xxxxxx> wrote:
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@xxxxxx>
- regs = gpio2regs(base);
+ regs = gpio_base + offset_array[i];
I understand this.
- 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;
And this, if each instans has 32 GPIOs.
- g = gpio2regs(0);
+ g = chips[0].regs;
Also makes sense.
- g = gpio2regs(gpio);
+ g = chips[bank / 2].regs;
But what is this? I don't understand that /2 at all. Please insert a
comment explaining it so I can figure it out. Are there two banks
per instance?
Yes! There are register sets for 32 GPIOs. 2 banks of 16 GPIOs are
covered by each set of registers hence /2. Shall i add a comment and
send this patch alone separately?
Yours,
Linus Walleij
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