diff options
Diffstat (limited to 'drivers/ufs/host/ufs-qcom.c')
| -rw-r--r-- | drivers/ufs/host/ufs-qcom.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 3e83dc51d538..8ebee0cc5313 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -740,8 +740,21 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op, /* reset the connected UFS device during power down */ - if (ufs_qcom_is_link_off(hba) && host->device_reset) + if (ufs_qcom_is_link_off(hba) && host->device_reset) { ufs_qcom_device_reset_ctrl(hba, true); + /* + * After sending the SSU command, asserting the rst_n + * line causes the device firmware to wake up and + * execute its reset routine. + * + * During this process, the device may draw current + * beyond the permissible limit for low-power mode (LPM). + * A 10ms delay, based on experimental observations, + * allows the UFS device to complete its hardware reset + * before transitioning the power rail to LPM. + */ + usleep_range(10000, 11000); + } return ufs_qcom_ice_suspend(host); } @@ -1024,9 +1037,6 @@ static struct ufs_dev_quirk ufs_qcom_dev_fixups[] = { { .wmanufacturerid = UFS_VENDOR_SKHYNIX, .model = UFS_ANY_MODEL, .quirk = UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM }, - { .wmanufacturerid = UFS_VENDOR_TOSHIBA, - .model = UFS_ANY_MODEL, - .quirk = UFS_DEVICE_QUIRK_DELAY_AFTER_LPM }, { .wmanufacturerid = UFS_VENDOR_WDC, .model = UFS_ANY_MODEL, .quirk = UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE }, @@ -1759,10 +1769,9 @@ static void ufs_qcom_dump_testbus(struct ufs_hba *hba) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); int i, j, nminor = 0, testbus_len = 0; - u32 *testbus __free(kfree) = NULL; char *prefix; - testbus = kmalloc_array(256, sizeof(u32), GFP_KERNEL); + u32 *testbus __free(kfree) = kmalloc_array(256, sizeof(u32), GFP_KERNEL); if (!testbus) return; @@ -1784,13 +1793,12 @@ static void ufs_qcom_dump_testbus(struct ufs_hba *hba) static int ufs_qcom_dump_regs(struct ufs_hba *hba, size_t offset, size_t len, const char *prefix, void __iomem *base) { - u32 *regs __free(kfree) = NULL; size_t pos; if (offset % 4 != 0 || len % 4 != 0) return -EINVAL; - regs = kzalloc(len, GFP_ATOMIC); + u32 *regs __free(kfree) = kzalloc(len, GFP_ATOMIC); if (!regs) return -ENOMEM; |