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Commit b17f2201 authored by Sujit Reddy Thumma's avatar Sujit Reddy Thumma
Browse files

scsi: ufs: call vendor specific setup_clocks during suspend/resume 



Vendor specific ->setup_clocks might be implemented by some
drivers to get notified on the power change in the core driver.
Call these callbacks so that vendor specific operations can
further save power by turning off unused clocks during suspend.

Change-Id: I3dd456d1d03d9f83522897af641c4c96a10cefcd
Signed-off-by: default avatarSujit Reddy Thumma <sthumma@codeaurora.org>
parent b555b857

drivers/scsi/ufs/ufshcd.c

+20 −2
Original line number Diff line number Diff line
@@ -4527,6 +4527,12 @@ disable_clks: 
			goto set_link_active;

	}



	if (hba->vops && hba->vops->setup_clocks) {

		ret = hba->vops->setup_clocks(hba, false);

		if (ret)

			goto vops_resume;

	}



	if (!ufshcd_is_link_active(hba))

		ufshcd_setup_clocks(hba, false);

	else
@@ -4540,6 +4546,9 @@ disable_clks: 
	ufshcd_disable_irq(hba);

	goto out;



vops_resume:

	if (hba->vops && hba->vops->resume)

		hba->vops->resume(hba, pm_op);

set_link_active:

	if (ufshcd_is_ufs_dev_poweroff(hba))

		ufshcd_setup_vreg(hba, true);
@@ -4579,6 +4588,12 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) 
	if (ret)

		goto out;



	if (hba->vops && hba->vops->setup_clocks) {

		ret = hba->vops->setup_clocks(hba, true);

		if (ret)

			goto disable_clks;

	}



	/* enable the host irq as host controller would be active soon */

	ufshcd_enable_irq(hba);
@@ -4589,7 +4604,7 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) 
		ret = ufshcd_toggle_vreg(hba->dev, hba->vreg_info.vcc, true);



	if (ret)

		goto disable_irq_and_clks;

		goto disable_irq_and_vops_clks;



	/*

	 * Call vendor specific resume callback. As these callbacks may access
@@ -4637,8 +4652,11 @@ disable_vreg: 
		ufshcd_setup_vreg(hba, false);

	else if (ufshcd_is_ufs_dev_sleep(hba))

		ufshcd_toggle_vreg(hba->dev, hba->vreg_info.vcc, false);

disable_irq_and_clks:

disable_irq_and_vops_clks:

	ufshcd_disable_irq(hba);

	if (hba->vops && hba->vops->setup_clocks)

		ret = hba->vops->setup_clocks(hba, false);

disable_clks:

	ufshcd_setup_clocks(hba, false);

out:

	hba->pm_op_in_progress = 0;