diff options
| author | Peter Griffin <peter.griffin@linaro.org> | 2024-04-26 15:20:01 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2024-05-07 04:34:37 +0300 |
| commit | 9238cad67969e7001e296eaedcdffc63fc38ab30 (patch) | |
| tree | 3fef809f8d7c2a593118b9a90497535d642bea2a | |
| parent | 449adb00d4f7870eb07adedd34e4a4b69036ec12 (diff) | |
| download | linux-9238cad67969e7001e296eaedcdffc63fc38ab30.tar.xz | |
scsi: ufs: exynos: Add EXYNOS_UFS_OPT_TIMER_TICK_SELECT option
This option is intended to be set for SoCs that have HCI_V2P1_CTRL register
and can select their tick source via IA_TICK_SEL bit.
Source clock selection for timer tick
0x0 = Bus clock (aclk)
0x1 = Function clock (mclk)
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Link: https://lore.kernel.org/r/20240426122004.2249178-4-peter.griffin@linaro.org
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Will McVicker <willmcvicker@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/ufs/host/ufs-exynos.c | 9 | ||||
| -rw-r--r-- | drivers/ufs/host/ufs-exynos.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c index 0219a5806619..3ca1357449c3 100644 --- a/drivers/ufs/host/ufs-exynos.c +++ b/drivers/ufs/host/ufs-exynos.c @@ -50,6 +50,8 @@ #define HCI_ERR_EN_N_LAYER 0x80 #define HCI_ERR_EN_T_LAYER 0x84 #define HCI_ERR_EN_DME_LAYER 0x88 +#define HCI_V2P1_CTRL 0x8C +#define IA_TICK_SEL BIT(16) #define HCI_CLKSTOP_CTRL 0xB0 #define REFCLKOUT_STOP BIT(4) #define MPHY_APBCLK_STOP BIT(3) @@ -1005,6 +1007,13 @@ static void exynos_ufs_fit_aggr_timeout(struct exynos_ufs *ufs) { u32 val; + /* Select function clock (mclk) for timer tick */ + if (ufs->opts & EXYNOS_UFS_OPT_TIMER_TICK_SELECT) { + val = hci_readl(ufs, HCI_V2P1_CTRL); + val |= IA_TICK_SEL; + hci_writel(ufs, val, HCI_V2P1_CTRL); + } + val = exynos_ufs_calc_time_cntr(ufs, IATOVAL_NSEC / CNTR_DIV_VAL); hci_writel(ufs, val & CNT_VAL_1US_MASK, HCI_1US_TO_CNT_VAL); } diff --git a/drivers/ufs/host/ufs-exynos.h b/drivers/ufs/host/ufs-exynos.h index 0fc21b6bbfcd..acf07cc54684 100644 --- a/drivers/ufs/host/ufs-exynos.h +++ b/drivers/ufs/host/ufs-exynos.h @@ -222,6 +222,7 @@ struct exynos_ufs { #define EXYNOS_UFS_OPT_USE_SW_HIBERN8_TIMER BIT(4) #define EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR BIT(5) #define EXYNOS_UFS_OPT_UFSPR_SECURE BIT(6) +#define EXYNOS_UFS_OPT_TIMER_TICK_SELECT BIT(7) }; #define for_each_ufs_rx_lane(ufs, i) \ |