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phy: samsung-ufs: ufs: Add SoC callbacks for calibration and clk data recovery

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Some SoCs like gs101 don't fit in well with the existing pll lock and
clock data recovery (CDR) callback used by existing exynos platforms.

Allow SoCs to specifify and implement their own calibration and CDR
functions that can be called by the generic samsung phy code.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240404122559.898930-11-peter.griffin@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Peter Griffin 2024-04-04 13:25:52 +01:00 committed by Vinod Koul
parent f2c6d0fa19
commit a4de58a909
5 changed files with 18 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/phy/samsung/phy-exynos7-ufs.c
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@ -82,4 +82,5 @@ const struct samsung_ufs_phy_drvdata exynos7_ufs_phy = {
.clk_list = exynos7_ufs_phy_clks,
.num_clks = ARRAY_SIZE(exynos7_ufs_phy_clks),
.cdr_lock_status_offset = EXYNOS7_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS,
.wait_for_cdr = samsung_ufs_phy_wait_for_lock_acq,
};

1
drivers/phy/samsung/phy-exynosautov9-ufs.c
View File

@ -71,4 +71,5 @@ const struct samsung_ufs_phy_drvdata exynosautov9_ufs_phy = {
.clk_list = exynosautov9_ufs_phy_clks,
.num_clks = ARRAY_SIZE(exynosautov9_ufs_phy_clks),
.cdr_lock_status_offset = EXYNOSAUTOV9_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS,
.wait_for_cdr = samsung_ufs_phy_wait_for_lock_acq,
};

1
drivers/phy/samsung/phy-fsd-ufs.c
View File

@ -60,4 +60,5 @@ const struct samsung_ufs_phy_drvdata fsd_ufs_phy = {
.clk_list = fsd_ufs_phy_clks,
.num_clks = ARRAY_SIZE(fsd_ufs_phy_clks),
.cdr_lock_status_offset = FSD_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS,
.wait_for_cdr = samsung_ufs_phy_wait_for_lock_acq,
};

13
drivers/phy/samsung/phy-samsung-ufs.c
View File

@ -46,7 +46,7 @@ static void samsung_ufs_phy_config(struct samsung_ufs_phy *phy,
}
}
static int samsung_ufs_phy_wait_for_lock_acq(struct phy *phy)
int samsung_ufs_phy_wait_for_lock_acq(struct phy *phy, u8 lane)
{
struct samsung_ufs_phy *ufs_phy = get_samsung_ufs_phy(phy);
const unsigned int timeout_us = 100000;
@ -98,8 +98,15 @@ static int samsung_ufs_phy_calibrate(struct phy *phy)
}
}
if (ufs_phy->ufs_phy_state == CFG_POST_PWR_HS)
err = samsung_ufs_phy_wait_for_lock_acq(phy);
for_each_phy_lane(ufs_phy, i) {
if (ufs_phy->ufs_phy_state == CFG_PRE_INIT &&
ufs_phy->drvdata->wait_for_cal)
err = ufs_phy->drvdata->wait_for_cal(phy, i);
if (ufs_phy->ufs_phy_state == CFG_POST_PWR_HS &&
ufs_phy->drvdata->wait_for_cdr)
err = ufs_phy->drvdata->wait_for_cdr(phy, i);
}
/**
* In Samsung ufshci, PHY need to be calibrated at different

5
drivers/phy/samsung/phy-samsung-ufs.h
View File

@ -112,6 +112,9 @@ struct samsung_ufs_phy_drvdata {
const char * const *clk_list;
int num_clks;
u32 cdr_lock_status_offset;
/* SoC's specific operations */
int (*wait_for_cal)(struct phy *phy, u8 lane);
int (*wait_for_cdr)(struct phy *phy, u8 lane);
};
struct samsung_ufs_phy {
@ -139,6 +142,8 @@ static inline void samsung_ufs_phy_ctrl_isol(
phy->isol.mask, isol ? 0 : phy->isol.en);
}
int samsung_ufs_phy_wait_for_lock_acq(struct phy *phy, u8 lane);
extern const struct samsung_ufs_phy_drvdata exynos7_ufs_phy;
extern const struct samsung_ufs_phy_drvdata exynosautov9_ufs_phy;
extern const struct samsung_ufs_phy_drvdata fsd_ufs_phy;