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Commit f71c3853 authored by Venkat Gopalakrishnan's avatar Venkat Gopalakrishnan Committed by Subhash Jadavani
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scsi: ufs-qcom: configure ufs clocks core memory 



Configure the ufs clocks core and peripheral memory state when
turned off. This configuration is required to allow retaining
ICE crypto configuration (including keys) when ice_core_clk is
turned off, and powering down non-ICE RAMs of host controller.

Change-Id: I93584851fd50c7006ccd48979087d707ab4c6408
Signed-off-by: default avatarVenkat Gopalakrishnan <venkatg@codeaurora.org>
Signed-off-by: default avatarSubhash Jadavani <subhashj@codeaurora.org>
parent 76f0a262

drivers/scsi/ufs/ufs-qcom.c

+24 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#include "ufs_quirks.h"

#include "ufs-qcom-ice.h"

#include "ufs-qcom-debugfs.h"

#include <linux/clk/qcom.h>



#define MAX_PROP_SIZE		   32

#define VDDP_REF_CLK_MIN_UV        1200000
@@ -356,6 +357,28 @@ static int ufs_qcom_enable_hw_clk_gating(struct ufs_hba *hba) 
	return err;

}



static void ufs_qcom_force_mem_config(struct ufs_hba *hba)

{

	struct ufs_clk_info *clki;



	/*

	 * Configure the behavior of ufs clocks core and peripheral

	 * memory state when they are turned off.

	 * This configuration is required to allow retaining

	 * ICE crypto configuration (including keys) when

	 * core_clk_ice is turned off, and powering down

	 * non-ICE RAMs of host controller.

	 */

	list_for_each_entry(clki, &hba->clk_list_head, list) {

		if (!strcmp(clki->name, "core_clk_ice"))

			clk_set_flags(clki->clk, CLKFLAG_RETAIN_MEM);

		else

			clk_set_flags(clki->clk, CLKFLAG_NORETAIN_MEM);

		clk_set_flags(clki->clk, CLKFLAG_NORETAIN_PERIPH);

		clk_set_flags(clki->clk, CLKFLAG_PERIPH_OFF_CLEAR);

	}

}



static int ufs_qcom_hce_enable_notify(struct ufs_hba *hba,

				      enum ufs_notify_change_status status)

{
@@ -364,6 +387,7 @@ static int ufs_qcom_hce_enable_notify(struct ufs_hba *hba, 


	switch (status) {

	case PRE_CHANGE:

		ufs_qcom_force_mem_config(hba);

		ufs_qcom_power_up_sequence(hba);

		/*

		 * The PHY PLL output is the source of tx/rx lane symbol