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Code Issues Releases Wiki Activity

scsi: ufshcd: Let vendor override devfreq parameters

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Vendor drivers may have a need to update the polling interval and
thresholds.  Provide a vops for vendor drivers to use.

Link: https://lore.kernel.org/r/acd79e00396cff855256adad47f615ccdbde85ac.1585160616.git.asutoshd@codeaurora.org
Acked-by: Avri Altman <Avri.Altman@wdc.com>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Asutosh Das 2020-03-25 11:29:01 -07:00 committed by Martin K. Petersen
parent 91831d3336
commit 2c75f9a5be
2 changed files with 26 additions and 1 deletions
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15
drivers/scsi/ufs/ufshcd.c
View file

@ -1315,6 +1315,17 @@ 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;
@ -1330,10 +1341,12 @@ 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);

12
drivers/scsi/ufs/ufshcd.h
View file

@ -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 */
@ -1094,6 +1098,14 @@ 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[];
/*