Hi Eddie,
On Tue, Aug 25, 2015 at 2:00 PM, Eddie Huang <eddie.hu...@mediatek.com> wrote:
> Register gpd_dev_ops.active_wakeup function to support keep power
> during suspend state. And add flag to each power domain to
> decide whether keep power during suspend or not.
>
> Signed-off-by: Chunfeng Yun <chunfeng....@mediatek.com>
> Signed-off-by: Eddie Huang <eddie.hu...@mediatek.com>
> Acked-by: Sascha Hauer <s.ha...@pengutronix.de>
>
> ---
> Change in v2:
> Drop .active_wakeup = false lines in scp_domain_data[] array
>
> ---
> drivers/soc/mediatek/mtk-scpsys.c | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
> diff --git a/drivers/soc/mediatek/mtk-scpsys.c
> b/drivers/soc/mediatek/mtk-scpsys.c
> index 43a79ed..df2f288 100644
> --- a/drivers/soc/mediatek/mtk-scpsys.c
> +++ b/drivers/soc/mediatek/mtk-scpsys.c
> @@ -67,6 +67,7 @@ struct scp_domain_data {
> u32 sram_pdn_ack_bits;
> u32 bus_prot_mask;
> enum clk_id clk_id;
> + bool active_wakeup;
> };
>
> static const struct scp_domain_data scp_domain_data[] __initconst = {
> @@ -127,6 +128,7 @@ static const struct scp_domain_data scp_domain_data[]
> __initconst = {
> .sram_pdn_bits = GENMASK(11, 8),
> .sram_pdn_ack_bits = GENMASK(15, 12),
> .clk_id = MT8173_CLK_NONE,
> + .active_wakeup = true,
> },
> [MT8173_POWER_DOMAIN_MFG_ASYNC] = {
> .name = "mfg_async",
> @@ -171,6 +173,7 @@ struct scp_domain {
> u32 sram_pdn_bits;
> u32 sram_pdn_ack_bits;
> u32 bus_prot_mask;
> + bool active_wakeup;
> };
>
> struct scp {
> @@ -370,6 +373,20 @@ out:
> return ret;
> }
>
> +static bool scpsys_active_wakeup(struct device *dev)
> +{
> + struct generic_pm_domain *genpd;
> + struct scp_domain *scpd;
> +
> + if (IS_ERR_OR_NULL(dev->pm_domain))
> + return false;
Is it really possible to get here w/ pm_domain as an ERR or NULL?
If the power core can ensure this cannot happen, then this function
could be a bit simpler.
Other than that, this patch is:
Reviewed-by: Daniel Kurtz <djku...@chromium.org>
-Dan
> +
> + genpd = pd_to_genpd(dev->pm_domain);
> + scpd = container_of(genpd, struct scp_domain, genpd);
> +
> + return scpd->active_wakeup;
> +}
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