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Commit 82669ba5 authored by Ashay Jaiswal's avatar Ashay Jaiswal Committed by Subbaraman Narayanamurthy
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qcom: qpnp-smb2: update micro-usb mode change sequence 



Switching to micro-USB mode in PBS might cause charger FSM
to stuck, update the micro-usb mode switch sequence to reset
FSM and move charger FSM into micro-USB mode.

CRs-Fixed: 2017880
Change-Id: I6e4484e9a83494f81dad0d9cdbd815b62d67c9af
Signed-off-by: default avatarAshay Jaiswal <ashayj@codeaurora.org>
parent ebe7e2b4

drivers/power/supply/qcom/qpnp-smb2.c

+37 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
 */



#include <linux/debugfs.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/module.h>

#include <linux/platform_device.h>
@@ -1332,6 +1333,7 @@ static int smb2_disable_typec(struct smb_charger *chg) 
{

	int rc;



	/* Move to typeC mode */

	/* configure FSM in idle state */

	rc = smblib_masked_write(chg, TYPE_C_INTRPT_ENB_SOFTWARE_CTRL_REG,

			TYPEC_DISABLE_CMD_BIT, TYPEC_DISABLE_CMD_BIT);
@@ -1340,6 +1342,39 @@ static int smb2_disable_typec(struct smb_charger *chg) 
		return rc;

	}



	/* wait for FSM to enter idle state */

	msleep(200);

	/* configure TypeC mode */

	rc = smblib_masked_write(chg, TYPE_C_CFG_REG,

			TYPE_C_OR_U_USB_BIT, 0);

	if (rc < 0) {

		dev_err(chg->dev, "Couldn't enable micro USB mode rc=%d\n", rc);

		return rc;

	}



	/* wait for mode change before enabling FSM */

	usleep_range(10000, 11000);

	/* release FSM from idle state */

	rc = smblib_masked_write(chg, TYPE_C_INTRPT_ENB_SOFTWARE_CTRL_REG,

			TYPEC_DISABLE_CMD_BIT, 0);

	if (rc < 0) {

		dev_err(chg->dev, "Couldn't release FSM rc=%d\n", rc);

		return rc;

	}



	/* wait for FSM to start */

	msleep(100);

	/* move to uUSB mode */

	/* configure FSM in idle state */

	rc = smblib_masked_write(chg, TYPE_C_INTRPT_ENB_SOFTWARE_CTRL_REG,

			TYPEC_DISABLE_CMD_BIT, TYPEC_DISABLE_CMD_BIT);

	if (rc < 0) {

		dev_err(chg->dev, "Couldn't put FSM in idle rc=%d\n", rc);

		return rc;

	}



	/* wait for FSM to enter idle state */

	msleep(200);

	/* configure micro USB mode */

	rc = smblib_masked_write(chg, TYPE_C_CFG_REG,

			TYPE_C_OR_U_USB_BIT, TYPE_C_OR_U_USB_BIT);
@@ -1348,6 +1383,8 @@ static int smb2_disable_typec(struct smb_charger *chg) 
		return rc;

	}



	/* wait for mode change before enabling FSM */

	usleep_range(10000, 11000);

	/* release FSM from idle state */

	rc = smblib_masked_write(chg, TYPE_C_INTRPT_ENB_SOFTWARE_CTRL_REG,

			TYPEC_DISABLE_CMD_BIT, 0);