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Subject[PATCH v2 2/3] scsi: ufshcd: Let vendor override devfreq parameters
Date
Vendor drivers may have a need to update the polling interval
and thresholds.
Provide a vops for vendor drivers to use.

Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
---
drivers/scsi/ufs/ufshcd.c | 15 ++++++++++++++-
drivers/scsi/ufs/ufshcd.h | 12 ++++++++++++
2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 7916c8b..61e8974 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1303,6 +1303,17 @@ static struct devfreq_dev_profile ufs_devfreq_profile = {
.get_dev_status = ufshcd_devfreq_get_dev_status,
};

+#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)
+static struct devfreq_simple_ondemand_data ufs_ondemand_data = {
+ .upthreshold = 70,
+ .downdifferential = 5,
+};
+
+static void *gov_data = &ufs_ondemand_data;
+#else
+static void *gov_data = NULL;
+#endif
+
static int ufshcd_devfreq_init(struct ufs_hba *hba)
{
struct list_head *clk_list = &hba->clk_list_head;
@@ -1318,10 +1329,12 @@ static int ufshcd_devfreq_init(struct ufs_hba *hba)
dev_pm_opp_add(hba->dev, clki->min_freq, 0);
dev_pm_opp_add(hba->dev, clki->max_freq, 0);

+ ufshcd_vops_config_scaling_param(hba, &ufs_devfreq_profile,
+ gov_data);
devfreq = devfreq_add_device(hba->dev,
&ufs_devfreq_profile,
DEVFREQ_GOV_SIMPLE_ONDEMAND,
- NULL);
+ gov_data);
if (IS_ERR(devfreq)) {
ret = PTR_ERR(devfreq);
dev_err(hba->dev, "Unable to register with devfreq %d\n", ret);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index d45a044..e8e8ee2 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -56,6 +56,7 @@
#include <linux/completion.h>
#include <linux/regulator/consumer.h>
#include <linux/bitfield.h>
+#include <linux/devfreq.h>
#include "unipro.h"

#include <asm/irq.h>
@@ -327,6 +328,9 @@ struct ufs_hba_variant_ops {
void (*dbg_register_dump)(struct ufs_hba *hba);
int (*phy_initialization)(struct ufs_hba *);
void (*device_reset)(struct ufs_hba *hba);
+ void (*config_scaling_param)(struct ufs_hba *hba,
+ struct devfreq_dev_profile *profile,
+ void *data);
};

/* clock gating state */
@@ -1083,6 +1087,14 @@ static inline void ufshcd_vops_device_reset(struct ufs_hba *hba)
}
}

+static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
+ struct devfreq_dev_profile
+ *profile, void *data)
+{
+ if (hba->vops && hba->vops->config_scaling_param)
+ hba->vops->config_scaling_param(hba, profile, data);
+}
+
extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];

/*
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
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