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Commit f37aabcf authored by Yaniv Gardi's avatar Yaniv Gardi Committed by Martin K. Petersen
Browse files

scsi: ufs-qcom: enable/disable the device ref clock 



This change enables the device ref clock before changing to HS mode
and disables it if entered to PWM mode.

Reviewed-by: default avatarGilad Broner <gbroner@codeaurora.org>
Signed-off-by: default avatarYaniv Gardi <ygardi@codeaurora.org>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 4b9ad0b8

drivers/scsi/ufs/ufs-qcom.c

+12 −0
Original line number Original line Diff line number Diff line
@@ -980,6 +980,10 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, 
			goto out;

			goto out;

		}

		}





		/* enable the device ref clock before changing to HS mode */

		if (!ufshcd_is_hs_mode(&hba->pwr_info) &&

			ufshcd_is_hs_mode(dev_req_params))

			ufs_qcom_dev_ref_clk_ctrl(host, true);

		break;

		break;

	case POST_CHANGE:

	case POST_CHANGE:

		if (ufs_qcom_cfg_timers(hba, dev_req_params->gear_rx,

		if (ufs_qcom_cfg_timers(hba, dev_req_params->gear_rx,
@@ -1007,6 +1011,11 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, 
		memcpy(&host->dev_req_params,

		memcpy(&host->dev_req_params,

				dev_req_params, sizeof(*dev_req_params));

				dev_req_params, sizeof(*dev_req_params));

		ufs_qcom_update_bus_bw_vote(host);

		ufs_qcom_update_bus_bw_vote(host);



		/* disable the device ref clock if entered PWM mode */

		if (ufshcd_is_hs_mode(&hba->pwr_info) &&

			!ufshcd_is_hs_mode(dev_req_params))

			ufs_qcom_dev_ref_clk_ctrl(host, false);

		break;

		break;

	default:

	default:

		ret = -EINVAL;

		ret = -EINVAL;
@@ -1108,6 +1117,9 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on) 
			ufs_qcom_phy_disable_iface_clk(host->generic_phy);

			ufs_qcom_phy_disable_iface_clk(host->generic_phy);

			goto out;

			goto out;

		}

		}

		/* enable the device ref clock for HS mode*/

		if (ufshcd_is_hs_mode(&hba->pwr_info))

			ufs_qcom_dev_ref_clk_ctrl(host, true);

		vote = host->bus_vote.saved_vote;

		vote = host->bus_vote.saved_vote;

		if (vote == host->bus_vote.min_bw_vote)

		if (vote == host->bus_vote.min_bw_vote)

			ufs_qcom_update_bus_bw_vote(host);

			ufs_qcom_update_bus_bw_vote(host);

drivers/scsi/ufs/ufshcd.h

+9 −0
Original line number Original line Diff line number Diff line
@@ -54,6 +54,7 @@ 
#include <linux/clk.h>

#include <linux/clk.h>

#include <linux/completion.h>

#include <linux/completion.h>

#include <linux/regulator/consumer.h>

#include <linux/regulator/consumer.h>

#include "unipro.h"





#include <asm/irq.h>

#include <asm/irq.h>

#include <asm/byteorder.h>

#include <asm/byteorder.h>
@@ -689,6 +690,14 @@ static inline int ufshcd_dme_peer_get(struct ufs_hba *hba, 




int ufshcd_read_device_desc(struct ufs_hba *hba, u8 *buf, u32 size);

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)

{

	return (pwr_info->pwr_rx == FAST_MODE ||

		pwr_info->pwr_rx == FASTAUTO_MODE) &&

		(pwr_info->pwr_tx == FAST_MODE ||

		pwr_info->pwr_tx == FASTAUTO_MODE);

}



#define ASCII_STD true

#define ASCII_STD true





int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index, u8 *buf,

int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index, u8 *buf,