diff options
| author | Stanley Chu <stanley.chu@mediatek.com> | 2022-06-16 08:37:24 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-06-17 05:08:44 +0300 |
| commit | ece418d0291117e3fc700f10e7fa9187010e38a0 (patch) | |
| tree | 7a131cf067c673f890d102df2a4360b747fbea13 /drivers/ufs/host | |
| parent | 1d6f9decb60a23cde2e0fbe0f89d5fc6d462ddd5 (diff) | |
| download | linux-ece418d0291117e3fc700f10e7fa9187010e38a0.tar.xz | |
scsi: ufs: ufs-mediatek: Support multiple VCC sources
Support multiple VCC sources in MediaTek UFS platforms.
Two options are provided and distinguished by specific device tree
attributes as below examples,
[Option 1: By numbering]
mediatek,ufs-vcc-by-num;
vcc-opt1-supply = <&mt6373_vbuck4_ufs>;
vcc-opt2-supply = <&mt6363_vemc>;
[Option 2: By UFS version]
mediatek,ufs-vcc-by-ver;
vcc-ufs3-supply = <&mt6373_vbuck4_ufs>;
Link: https://lore.kernel.org/r/20220616053725.5681-11-stanley.chu@mediatek.com
Signed-off-by: Alice Chao <alice.chao@mediatek.com>
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>
Diffstat (limited to 'drivers/ufs/host')
| -rw-r--r-- | drivers/ufs/host/ufs-mediatek.c | 46 | ||||
| -rw-r--r-- | drivers/ufs/host/ufs-mediatek.h | 14 |
2 files changed, 59 insertions, 1 deletions
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index e756aba45acd..34e51c094366 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -669,6 +669,49 @@ static u32 ufs_mtk_get_ufs_hci_version(struct ufs_hba *hba) return hba->ufs_version; } +#define MAX_VCC_NAME 30 +static int ufs_mtk_vreg_fix_vcc(struct ufs_hba *hba) +{ + struct ufs_vreg_info *info = &hba->vreg_info; + struct device_node *np = hba->dev->of_node; + struct device *dev = hba->dev; + char vcc_name[MAX_VCC_NAME]; + struct arm_smccc_res res; + int err, ver; + + if (hba->vreg_info.vcc) + return 0; + + if (of_property_read_bool(np, "mediatek,ufs-vcc-by-num")) { + ufs_mtk_get_vcc_num(res); + if (res.a1 > UFS_VCC_NONE && res.a1 < UFS_VCC_MAX) + snprintf(vcc_name, MAX_VCC_NAME, "vcc-opt%u", res.a1); + else + return -ENODEV; + } else if (of_property_read_bool(np, "mediatek,ufs-vcc-by-ver")) { + ver = (hba->dev_info.wspecversion & 0xF00) >> 8; + snprintf(vcc_name, MAX_VCC_NAME, "vcc-ufs%u", ver); + } else { + return 0; + } + + err = ufshcd_populate_vreg(dev, vcc_name, &info->vcc); + if (err) + return err; + + err = ufshcd_get_vreg(dev, info->vcc); + if (err) + return err; + + err = regulator_enable(info->vcc->reg); + if (!err) { + info->vcc->enabled = true; + dev_info(dev, "%s: %s enabled\n", __func__, vcc_name); + } + + return err; +} + /** * ufs_mtk_init - find other essential mmio bases * @hba: host controller instance @@ -1179,7 +1222,6 @@ static int ufs_mtk_apply_dev_quirks(struct ufs_hba *hba) else ufs_mtk_setup_ref_clk_wait_us(hba, REFCLK_DEFAULT_WAIT_US); - return 0; } @@ -1197,6 +1239,8 @@ static void ufs_mtk_fixup_dev_quirks(struct ufs_hba *hba) hba->dev_quirks &= ~(UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM | UFS_DEVICE_QUIRK_DELAY_AFTER_LPM); } + + ufs_mtk_vreg_fix_vcc(hba); } static void ufs_mtk_event_notify(struct ufs_hba *hba, diff --git a/drivers/ufs/host/ufs-mediatek.h b/drivers/ufs/host/ufs-mediatek.h index 5c6101ac518f..49a2137fb251 100644 --- a/drivers/ufs/host/ufs-mediatek.h +++ b/drivers/ufs/host/ufs-mediatek.h @@ -83,6 +83,7 @@ enum { #define UFS_MTK_SIP_DEVICE_RESET BIT(1) #define UFS_MTK_SIP_CRYPTO_CTRL BIT(2) #define UFS_MTK_SIP_REF_CLK_NOTIFICATION BIT(3) +#define UFS_MTK_SIP_GET_VCC_NUM BIT(6) #define UFS_MTK_SIP_DEVICE_PWR_CTRL BIT(7) /* @@ -145,6 +146,16 @@ struct ufs_mtk_host { }; /* + * Multi-VCC by Numbering + */ +enum ufs_mtk_vcc_num { + UFS_VCC_NONE = 0, + UFS_VCC_1, + UFS_VCC_2, + UFS_VCC_MAX +}; + +/* * SMC call wrapper function */ struct ufs_mtk_smc_arg { @@ -183,6 +194,9 @@ static void _ufs_mtk_smc(struct ufs_mtk_smc_arg s) #define ufs_mtk_device_reset_ctrl(high, res) \ ufs_mtk_smc(UFS_MTK_SIP_DEVICE_RESET, &(res), high) +#define ufs_mtk_get_vcc_num(res) \ + ufs_mtk_smc(UFS_MTK_SIP_GET_VCC_NUM, &(res)) + #define ufs_mtk_device_pwr_ctrl(on, ufs_ver, res) \ ufs_mtk_smc(UFS_MTK_SIP_DEVICE_PWR_CTRL, &(res), on, ufs_ver) |