Re: [PATCH v2 9/9] mfd: wm5110: Add delay before releasing reset line

Lee Jones
2015-04-29T11:54:09Z

On Fri, 17 Apr 2015, Charles Keepax wrote:

> On the wm5110 it is important the reset line is held for slightly longer
> to ensure the device starts up well. This patch adds a 5mS delay for
> this.
>
> Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
> ---
> drivers/mfd/arizona-core.c | 9 +++++++++
> 1 files changed, 9 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
> index def3ad3..e1f0a68 100644
> --- a/drivers/mfd/arizona-core.c
> +++ b/drivers/mfd/arizona-core.c
> @@ -259,6 +259,15 @@ static inline void arizona_enable_reset(struct arizona *arizona)
> static void arizona_disable_reset(struct arizona *arizona)
> {
> if (arizona->pdata.reset) {
> + switch (arizona->type) {
> + case WM5110:
> + case WM8280:

Comment here please.

> + msleep(5);
> + break;
> + default:
> + break;
> + }
> +
> gpio_set_value_cansleep(arizona->pdata.reset, 1);
> msleep(1);
> }

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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