Hi Peter,
On Mon, 2019-03-18 at 19:38 +0000, Peter Griffin wrote:
> This is required to bring Mali450 gpu out of reset.
>
> Signed-off-by: Peter Griffin <[email protected]>
> ---
> drivers/reset/hisilicon/hi6220_reset.c | 51
> +++++++++++++++++++++++++++++++++-
> 1 file changed, 50 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/reset/hisilicon/hi6220_reset.c
> b/drivers/reset/hisilicon/hi6220_reset.c
> index d5e5229..0cd5f92 100644
> --- a/drivers/reset/hisilicon/hi6220_reset.c
> +++ b/drivers/reset/hisilicon/hi6220_reset.c
> @@ -36,6 +36,7 @@
> enum hi6220_reset_ctrl_type {
> PERIPHERAL,
> MEDIA,
> + AO,
> };
>
> struct hi6220_reset_data {
> @@ -95,6 +96,47 @@ static const struct reset_control_ops
> hi6220_media_reset_ops = {
> .deassert = hi6220_media_deassert,
> };
>
> +#define AO_SCTRL_SC_PW_CLKEN0 0x800
> +#define AO_SCTRL_SC_PW_CLKDIS0 0x804
> +
> +#define AO_SCTRL_SC_PW_RSTEN0 0x810
> +#define AO_SCTRL_SC_PW_RSTDIS0 0x814
> +
> +#define AO_SCTRL_SC_PW_ISOEN0 0x820
> +#define AO_SCTRL_SC_PW_ISODIS0 0x824
> +#define AO_MAX_INDEX 12
> +
> +static int hi6220_ao_assert(struct reset_controller_dev *rc_dev,
> + unsigned long idx)
> +{
> + struct hi6220_reset_data *data = to_reset_data(rc_dev);
> + struct regmap *regmap = data->regmap;
> + int ret;
> +
> + ret = regmap_write(regmap, AO_SCTRL_SC_PW_RSTEN0, BIT(idx));
> + ret |= regmap_write(regmap, AO_SCTRL_SC_PW_ISOEN0, BIT(idx));
> + ret |= regmap_write(regmap, AO_SCTRL_SC_PW_CLKDIS0, BIT(idx));
What if two regmap_writes return a different error code? Better check
for ret and return individually. Also, no need to issue two more writes
if the first one failed.
> + return ret;
> +}
> +
> +static int hi6220_ao_deassert(struct reset_controller_dev *rc_dev,
> + unsigned long idx)
> +{
> + struct hi6220_reset_data *data = to_reset_data(rc_dev);
> + struct regmap *regmap = data->regmap;
> + int ret;
> +
> + ret = regmap_write(regmap, AO_SCTRL_SC_PW_RSTDIS0, BIT(idx));
> + ret |= regmap_write(regmap, AO_SCTRL_SC_PW_ISODIS0, BIT(idx));
> + ret |= regmap_write(regmap, AO_SCTRL_SC_PW_CLKEN0, BIT(idx));
Same as above. Otherwise this looks fine. With this fixed, I could pick
up patches 2, 4, and 5.
regards
Philipp
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