iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: ufs: ufs-mediatek: Add stage information for ref-clk control

Browse Source 
Add "PRE_CHANGE" and "POST_CHANGE" information for ref-clk control to
precisely configure the low-power state of the parent of ref-clk.

Link: https://lore.kernel.org/r/20220623035052.18802-5-stanley.chu@mediatek.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Peter Wang 2022-06-23 11:50:48 +08:00 committed by Martin K. Petersen
parent 2bae03a6ac
commit f53f191357
2 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/ufs/host/ufs-mediatek.c
View File

@ -244,8 +244,9 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
if (host->ref_clk_enabled == on)
return 0;
ufs_mtk_ref_clk_notify(on, PRE_CHANGE, res);
if (on) {
ufs_mtk_ref_clk_notify(on, res);
ufshcd_writel(hba, REFCLK_REQUEST, REG_UFS_REFCLK_CTRL);
} else {
ufshcd_delay_us(host->ref_clk_gating_wait_us, 10);
@ -267,7 +268,7 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
dev_err(hba->dev, "missing ack of refclk req, reg: 0x%x\n", value);
ufs_mtk_ref_clk_notify(host->ref_clk_enabled, res);
ufs_mtk_ref_clk_notify(host->ref_clk_enabled, POST_CHANGE, res);
return -ETIMEDOUT;
@ -275,8 +276,8 @@ out:
host->ref_clk_enabled = on;
if (on)
ufshcd_delay_us(host->ref_clk_ungating_wait_us, 10);
else
ufs_mtk_ref_clk_notify(on, res);
ufs_mtk_ref_clk_notify(on, POST_CHANGE, res);
return 0;
}

4
drivers/ufs/host/ufs-mediatek.h
View File

@ -189,8 +189,8 @@ static void _ufs_mtk_smc(struct ufs_mtk_smc_arg s)
#define ufs_mtk_crypto_ctrl(res, enable) \
ufs_mtk_smc(UFS_MTK_SIP_CRYPTO_CTRL, &(res), enable)
#define ufs_mtk_ref_clk_notify(on, res) \
ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, &(res), on)
#define ufs_mtk_ref_clk_notify(on, stage, res) \
ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, &(res), on, stage)
#define ufs_mtk_device_reset_ctrl(high, res) \
ufs_mtk_smc(UFS_MTK_SIP_DEVICE_RESET, &(res), high)