Re: [v2,4/6] reset-controller: ti: introduce a new reset handler

Stanley Chu
2020-08-04T05:10:37Z

On Mon, 2020-08-03 at 14:15 +0800, Crystal Guo wrote:
> Add ti_syscon_reset() to integrate assert and deassert together.
> If some modules need do serialized assert and deassert operations
> to reset itself, reset_control_reset can be called for convenience.
>
> Change-Id: I9046992b115a46f3594de57fa89c6a2de9957d49

Please drop "Change-Id" tags.

> ---
> drivers/reset/reset-ti-syscon.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/drivers/reset/reset-ti-syscon.c b/drivers/reset/reset-ti-syscon.c
> index a2635c21db7f..1c74bcb9a6c3 100644
> --- a/drivers/reset/reset-ti-syscon.c
> +++ b/drivers/reset/reset-ti-syscon.c
> @@ -56,6 +56,7 @@ struct ti_syscon_reset_data {
> struct regmap *regmap;
> struct ti_syscon_reset_control *controls;
> unsigned int nr_controls;
> + bool assert_deassert_together;
> };
>
> #define to_ti_syscon_reset_data(rcdev) \
> @@ -158,10 +159,24 @@ static int ti_syscon_reset_status(struct reset_controller_dev *rcdev,
> !(control->flags & STATUS_SET);
> }
>
> +static int ti_syscon_reset(struct reset_controller_dev *rcdev,
> + unsigned long id)
> +{
> + struct ti_syscon_reset_data *data = to_ti_syscon_reset_data(rcdev);
> +
> + if (data->assert_deassert_together) {
> + ti_syscon_reset_assert(rcdev, id);
> + return ti_syscon_reset_deassert(rcdev, id);
> + } else {
> + return -ENOTSUPP;
> + }
> +}
> +
> static const struct reset_control_ops ti_syscon_reset_ops = {
> .assert = ti_syscon_reset_assert,
> .deassert = ti_syscon_reset_deassert,
> .status = ti_syscon_reset_status,
> + .reset = ti_syscon_reset,
> };
>
> static int ti_syscon_reset_probe(struct platform_device *pdev)
> @@ -204,6 +219,11 @@ static int ti_syscon_reset_probe(struct platform_device *pdev)
> controls[i].flags = be32_to_cpup(list++);
> }
>
> + if (of_property_read_bool(np, "assert-deassert-together"))
> + data->assert_deassert_together = true;
> + else
> + data->assert_deassert_together = false;
> +
> data->rcdev.ops = &ti_syscon_reset_ops;
> data->rcdev.owner = THIS_MODULE;
> data->rcdev.of_node = np;

Perhaps please provide the reason why you shall add this new method? Any
existed or upcoming users?

Thanks,

Stanley Chu