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scsi: ufs: add ufshcd_dme_rmw wrapper

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Add a wrapper to get/modify/set DME attribute.

Change-Id: Ife2ae05950e6c437bef779955432d91d5117d49b
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
This commit is contained in:
Venkat Gopalakrishnan 2016-04-15 17:31:08 -07:00 • committed by Kyle Yan
parent f0a5174e94
commit dbd6e84bff
1 changed files with 26 additions and 0 deletions
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26
drivers/scsi/ufs/ufshcd.h
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@ -1049,6 +1049,32 @@ static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
}
/**
* ufshcd_dme_rmw - get modify set a dme attribute
* @hba - per adapter instance
* @mask - mask to apply on read value
* @val - actual value to write
* @attr - dme attribute
*/
static inline int ufshcd_dme_rmw(struct ufs_hba *hba, u32 mask,
u32 val, u32 attr)
{
u32 cfg = 0;
int err = 0;
err = ufshcd_dme_get(hba, UIC_ARG_MIB(attr), &cfg);
if (err)
goto out;
cfg &= ~mask;
cfg |= (val & mask);
err = ufshcd_dme_set(hba, UIC_ARG_MIB(attr), cfg);
out:
return err;
}
int ufshcd_read_device_desc(struct ufs_hba *hba, u8 *buf, u32 size);
static inline bool ufshcd_is_hs_mode(struct ufs_pa_layer_attr *pwr_info)