[PATCH V1 2/3] scsi: ufs: add a vops to configure VCC voltage level

Nitin Rawat
2021-01-28T16:57:31Z

Add a vops to configure VCC voltage VCC voltage level
for platform supporting both ufs2.x and ufs 3.x devices.

Signed-off-by: Nitin Rawat <nitirawa@codeaurora.org>
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
---
drivers/scsi/ufs/ufshcd.c | 5 +++++
drivers/scsi/ufs/ufshcd.h | 10 ++++++++++
2 files changed, 15 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 000a03a..3b2e026 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7772,6 +7772,11 @@ static int ufshcd_add_lus(struct ufs_hba *hba)
if (ret)
goto out;

+ if (ufshcd_vops_setup_vcc_regulators(hba))
+ dev_err(hba->dev,
+ "%s: Failed to set the VCC regulator values, continue with 2.7v\n",
+ __func__);
+
/* Initialize devfreq after UFS device is detected */
if (ufshcd_is_clkscaling_supported(hba)) {
memcpy(&hba->clk_scaling.saved_pwr_info.info,
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 1410c95..250cff5 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -324,6 +324,7 @@ struct ufs_pwr_mode_info {
* @device_reset: called to issue a reset pulse on the UFS device
* @program_key: program or evict an inline encryption key
* @event_notify: called to notify important events
+ * @setup_vcc_regulators : update vcc regulator level
*/
struct ufs_hba_variant_ops {
const char *name;
@@ -360,6 +361,7 @@ struct ufs_hba_variant_ops {
const union ufs_crypto_cfg_entry *cfg, int slot);
void (*event_notify)(struct ufs_hba *hba,
enum ufs_event_type evt, void *data);
+ int (*setup_vcc_regulators)(struct ufs_hba *hba);
};

/* clock gating state */
@@ -1269,6 +1271,14 @@ static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
hba->vops->config_scaling_param(hba, profile, data);
}

+static inline int ufshcd_vops_setup_vcc_regulators(struct ufs_hba *hba)
+{
+ if (hba->vops && hba->vops->setup_vcc_regulators)
+ return hba->vops->setup_vcc_regulators(hba);
+
+ return 0;
+}
+
extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];

/*
--
2.7.4