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J . Bottomley" , "Martin K . Petersen" , Alim Akhtar , Bart Van Assche Cc: linux-phy@lists.infradead.org, linux-scsi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Chanho Park Subject: [PATCH v2 2/3] phy: samsung-ufs: ufs: change phy on/off control Date: Wed, 6 Jul 2022 11:02:54 +0900 Message-Id: <20220706020255.151177-3-chanho61.park@samsung.com> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220706020255.151177-1-chanho61.park@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrOJsWRmVeSWpSXmKPExsWy7bCmhe7Xt0eSDObOlrJ4MG8bm8W0Dz+Z LS7v17ZYdGMbk8WFpz1sFntfb2W32PT4GqvFhFXfWCxmnN/HZNF9fQebxfLj/5gsdt45wezA 43H5irfHplWdbB53ru1h85iw6ACjx+Yl9R4fn95i8ejbsorR4/iN7UwenzfJBXBGZdtkpCam pBYppOYl56dk5qXbKnkHxzvHm5oZGOoaWlqYKynkJeam2iq5+AToumXmAB2spFCWmFMKFApI LC5W0rezKcovLUlVyMgvLrFVSi1IySkwL9ArTswtLs1L18tLLbEyNDAwMgUqTMjOaNn3jLng ulDF21MbmBoYT/B3MXJySAiYSKzsfMsOYgsJ7GCU6F8k08XIBWR/YpQ4fPYDVOIbo8TWWaww DY3PDjFCFO1llHj5fSOU8xHIWdLCBlLFJqArseX5K7CEiMAOJolbLRNZQBxmgc2MEu1Xd4JV CQt4SJyf3Am2g0VAVeLvgTVgO3gF7CWu9u5mgtgnL7Hh4HYWEJtTwEHi9+9eZogaQYmTM5+A xZmBapq3zmYGWSAhsJRDouHLOUaIZheJrs+7WSBsYYlXx7ewQ9hSEp/f7WWDsIslls76xATR 3MAocXnbL6iEscSsZ+1AgziANmhKrN+lD2JKCChLHLkFtZdPouPwX3aIMK9ER5sQRKO6xIHt 06G2ykp0z/kMDToPiZdg74JCazIwHD49ZpzAqDALyTuzkLwzC2HxAkbmVYxiqQXFuempxUYF xvAoTs7P3cQITsFa7jsYZ7z9oHeIkYmD8RCjBAezkgjvqkkHk4R4UxIrq1KL8uOLSnNSiw8x mgIDeyKzlGhyPjAL5JXEG5pYGpiYmRmaG5kamCuJ83qlbEgUEkhPLEnNTk0tSC2C6WPi4JRq YBL7dK5cxOHnjBOcjyeJ9Ew6o8z9KO1pwxxplgaj1ydV9n8o7LDor1LcdG7d1aRrn+bNuJ7+ QWbHttnLjl1l2XEtIGmB0d8wuym/HllJiLpJPL0s4GKz96foq5vGa062NkmZpurczZveeJsl U/aRRmT4gmffN5n9NtsSVR6xYSFb2dVnwQa90qf+anle6Dr28zXnGYOWgxlP+V3aW4VsM1tf Tbx7wDD09r+UkrJf006vCdpeoOpec2diea7RmfPJWV3BeiszJ7F8Me358Pk3x1LXSoe39xe/ PJTtFFhUF3eZ53CH5uqp+dJ/P9da2q+XOcT8QbP94DJrA23mXPHdzVn7Luo5RhypNDp/OF5Q PUuJpTgj0VCLuag4EQB0oHVbSgQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrMLMWRmVeSWpSXmKPExsWy7bCSvO6Xt0eSDCZvNLR4MG8bm8W0Dz+Z LS7v17ZYdGMbk8WFpz1sFntfb2W32PT4GqvFhFXfWCxmnN/HZNF9fQebxfLj/5gsdt45wezA 43H5irfHplWdbB53ru1h85iw6ACjx+Yl9R4fn95i8ejbsorR4/iN7UwenzfJBXBGcdmkpOZk lqUW6dslcGW07HvGXHBdqOLtqQ1MDYwn+LsYOTkkBEwkGp8dYuxi5OIQEtjNKHHi5zcmiISs xLN3O9ghbGGJ+y1HWCGK3jNKrPh1jRUkwSagK7Hl+SuwbhGBPUwSX+ZtYAFxmAW2M0pMeXud BaRKWMBD4vzkTrBRLAKqEn8PrAHr5hWwl7jauxtqnbzEhoPbweo5BRwkfv/uZQaxhYBq7n1a zQJRLyhxcuYTMJsZqL5562zmCYwCs5CkZiFJLWBkWsUomVpQnJueW2xYYJiXWq5XnJhbXJqX rpecn7uJERwvWpo7GLev+qB3iJGJg/EQowQHs5II76pJB5OEeFMSK6tSi/Lji0pzUosPMUpz sCiJ817oOhkvJJCeWJKanZpakFoEk2Xi4JRqYFr3I6Mrc//7Xo2HjQ/4tDl29B6p+1dwYWK8 6G3BQzlMB43N9qzqe/jW9tYJv4v7Hktwck/m2qJb8EUp48fB99eqJU9lnamZ3cm/yD5oUVu+ u3Sn2ckegTbXLcndeZYLDVhnnF4aw/DkxsL/fx8d18x5NOu8ZMENvl/sc3blyf5uE7GYfIt5 6a8OSTOLIK6rZ7Ju1Su98Vs413q1sdv1wH4BXSvhlEzRM/U3d4Yq1tl69rkqixjd/Pvw7zqW 4uztaiXBBhfO5fpWsJ494qWg/OKZwsyOxFVqd6cHcxsXfu26WLJwx+efi97vLX8aJvnrUvDe jz6PecJXFP8K+nb5lmx1jYNJB1dcpaPau6le9kosxRmJhlrMRcWJABWowkcGAwAA X-CMS-MailID: 20220706020540epcas2p15efea24c0f670514785b991e3c1118e8 X-Msg-Generator: CA X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220706020540epcas2p15efea24c0f670514785b991e3c1118e8 References: <20220706020255.151177-1-chanho61.park@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org 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 Reviewed-by: Krzysztof Kozlowski --- drivers/phy/samsung/phy-samsung-ufs.c | 32 ++++++++++++++++----------- 1 file changed, 19 insertions(+), 13 deletions(-) diff --git a/drivers/phy/samsung/phy-samsung-ufs.c b/drivers/phy/samsung/phy-samsung-ufs.c index 14cce2f2487e..183c88e3d1ec 100644 --- a/drivers/phy/samsung/phy-samsung-ufs.c +++ b/drivers/phy/samsung/phy-samsung-ufs.c @@ -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; }