On Wednesday 10 September 2014 05:24 PM, Dolev Raviv wrote:
> From: Sahitya Tummala <[email protected]>
>
> The UFS controller clocks can be gated after certain period of
> inactivity, which is typically less than runtime suspend timeout.
> In addition to clocks the link will also be put into Hibern8 mode
> to save more power.
>
<snip>
>
> @@ -1902,12 +2149,16 @@ out:
> static int ufshcd_uic_change_pwr_mode(struct ufs_hba *hba, u8 mode)
> {
> struct uic_command uic_cmd = {0};
> + int ret;
>
> uic_cmd.command = UIC_CMD_DME_SET;
> uic_cmd.argument1 = UIC_ARG_MIB(PA_PWRMODE);
> uic_cmd.argument3 = mode;
> -
> - return ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
> + ufshcd_hold(hba, false);
> + ret = ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
> + ufshcd_release(hba);
> +out:
May be you can remove this label because it is not used anywhere.
> + return ret;
> }
>
> static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
> @@ -2306,6 +2557,7 @@ static int ufshcd_verify_dev_init(struct ufs_hba *hba)
> int err = 0;
> int retries;
>
> + ufshcd_hold(hba, false);
> mutex_lock(&hba->dev_cmd.lock);
> for (retries = NOP_OUT_RETRIES; retries > 0; retries--) {
> err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_NOP,
> @@ -2317,6 +2569,7 @@ static int ufshcd_verify_dev_init(struct ufs_hba *hba)
> dev_dbg(hba->dev, "%s: error %d retrying\n", __func__, err);
> }
> mutex_unlock(&hba->dev_cmd.lock);
> + ufshcd_release(hba);
>
Thanks,
--Kiran
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