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phy: samsung-ufs: ufs: change phy on/off control

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The sequence of controlling ufs phy block should be below:

1) Power On
 - Turn off pmu isolation
 - Clock enable
2) Power Off
 - Clock disable
 - Turn on pmu isolation

Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220706020255.151177-3-chanho61.park@samsung.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Chanho Park 2022-07-06 11:02:54 +09:00 committed by Vinod Koul
parent 8d5bb683d5
commit 4e123efa45
1 changed files with 19 additions and 13 deletions
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32
drivers/phy/samsung/phy-samsung-ufs.c
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@ -151,37 +151,43 @@ static int samsung_ufs_phy_clks_init(struct samsung_ufs_phy *phy)
static int samsung_ufs_phy_init(struct phy *phy)
{
struct samsung_ufs_phy *ss_phy = get_samsung_ufs_phy(phy);
int ret;
ss_phy->lane_cnt = phy->attrs.bus_width;
ss_phy->ufs_phy_state = CFG_PRE_INIT;
return 0;
}
static int samsung_ufs_phy_power_on(struct phy *phy)
{
struct samsung_ufs_phy *ss_phy = get_samsung_ufs_phy(phy);
int ret;
samsung_ufs_phy_ctrl_isol(ss_phy, false);
ret = clk_bulk_prepare_enable(ss_phy->drvdata->num_clks, ss_phy->clks);
if (ret) {
dev_err(ss_phy->dev, "failed to enable ufs phy clocks\n");
return ret;
}
ret = samsung_ufs_phy_calibrate(phy);
if (ret)
dev_err(ss_phy->dev, "ufs phy calibration failed\n");
if (ss_phy->ufs_phy_state == CFG_PRE_INIT) {
ret = samsung_ufs_phy_calibrate(phy);
if (ret)
dev_err(ss_phy->dev, "ufs phy calibration failed\n");
}
return ret;
}
static int samsung_ufs_phy_power_on(struct phy *phy)
{
struct samsung_ufs_phy *ss_phy = get_samsung_ufs_phy(phy);
samsung_ufs_phy_ctrl_isol(ss_phy, false);
return 0;
}
static int samsung_ufs_phy_power_off(struct phy *phy)
{
struct samsung_ufs_phy *ss_phy = get_samsung_ufs_phy(phy);
clk_bulk_disable_unprepare(ss_phy->drvdata->num_clks, ss_phy->clks);
samsung_ufs_phy_ctrl_isol(ss_phy, true);
return 0;
}
@ -202,7 +208,7 @@ static int samsung_ufs_phy_exit(struct phy *phy)
{
struct samsung_ufs_phy *ss_phy = get_samsung_ufs_phy(phy);
clk_bulk_disable_unprepare(ss_phy->drvdata->num_clks, ss_phy->clks);
ss_phy->ufs_phy_state = CFG_TAG_MAX;
return 0;
}