On 04/03/2018 09:15 AM, sean.wang@xxxxxxxxxxxx wrote:
> From: Sean Wang <sean.wang@xxxxxxxxxxxx>
>
> Reuse the common helpers regmap_read_poll_timeout provided by Linux core
> instead of an open-coded handling.
>
> Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
> Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx>
> Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
> Cc: Weiyi Lu <weiyi.lu@xxxxxxxxxxxx>
> ---
> drivers/soc/mediatek/mtk-infracfg.c | 45 +++++++++----------------------------
> 1 file changed, 10 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-infracfg.c b/drivers/soc/mediatek/mtk-infracfg.c
> index 8c310de..b849aa5 100644
> --- a/drivers/soc/mediatek/mtk-infracfg.c
> +++ b/drivers/soc/mediatek/mtk-infracfg.c
> @@ -12,6 +12,7 @@
> */
>
> #include <linux/export.h>
> +#include <linux/iopoll.h>
> #include <linux/jiffies.h>
> #include <linux/regmap.h>
> #include <linux/soc/mediatek/infracfg.h>
> @@ -37,7 +38,6 @@
> int mtk_infracfg_set_bus_protection(struct regmap *infracfg, u32 mask,
> bool reg_update)
> {
> - unsigned long expired;
> u32 val;
> int ret;
>
> @@ -47,22 +47,11 @@ int mtk_infracfg_set_bus_protection(struct regmap *infracfg, u32 mask,
> else
> regmap_write(infracfg, INFRA_TOPAXI_PROTECTEN_SET, mask);
>
> - expired = jiffies + HZ;
> + ret = regmap_read_poll_timeout(infracfg, INFRA_TOPAXI_PROTECTSTA1,
> + val, (val & mask) == mask, 10,
> + jiffies_to_usecs(HZ));
To align with the changes in scpsys, please define MTK_POLL_DELAY_US and
MTK_POLL_TIMEOUT. I'm not really fan of passing macros as function arguments.
Other then that, the patch looks good.
Thanks a lot,
Matthias
>
> - while (1) {
> - ret = regmap_read(infracfg, INFRA_TOPAXI_PROTECTSTA1, &val);
> - if (ret)
> - return ret;
> -
> - if ((val & mask) == mask)
> - break;
> -
> - cpu_relax();
> - if (time_after(jiffies, expired))
> - return -EIO;
> - }
> -
> - return 0;
> + return ret;
> }
>
> /**
> @@ -80,30 +69,16 @@ int mtk_infracfg_set_bus_protection(struct regmap *infracfg, u32 mask,
> int mtk_infracfg_clear_bus_protection(struct regmap *infracfg, u32 mask,
> bool reg_update)
> {
> - unsigned long expired;
> int ret;
> + u32 val;
>
> if (reg_update)
> regmap_update_bits(infracfg, INFRA_TOPAXI_PROTECTEN, mask, 0);
> else
> regmap_write(infracfg, INFRA_TOPAXI_PROTECTEN_CLR, mask);
>
> - expired = jiffies + HZ;
> -
> - while (1) {
> - u32 val;
> -
> - ret = regmap_read(infracfg, INFRA_TOPAXI_PROTECTSTA1, &val);
> - if (ret)
> - return ret;
> -
> - if (!(val & mask))
> - break;
> -
> - cpu_relax();
> - if (time_after(jiffies, expired))
> - return -EIO;
> - }
> -
> - return 0;
> + ret = regmap_read_poll_timeout(infracfg, INFRA_TOPAXI_PROTECTSTA1,
> + val, !(val & mask), 10,
> + jiffies_to_usecs(HZ));
> + return ret;
> }
>
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