Commit 2c75f9a5 authored by Asutosh Das's avatar Asutosh Das Committed by Martin K. Petersen
Browse files

scsi: ufshcd: Let vendor override devfreq parameters 

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: default avatarAvri Altman <Avri.Altman@wdc.com>
Signed-off-by: default avatarAsutosh Das <asutoshd@codeaurora.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 91831d33

drivers/scsi/ufs/ufshcd.c

+14 −1
Original line number Diff line number Diff line
@@ -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);

drivers/scsi/ufs/ufshcd.h

+12 −0
Original line number Diff line number Diff line
@@ -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[];



/*

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