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Commit 5723deb4 authored by Ajit Kumar's avatar Ajit Kumar
Browse files

soc: qcom: bgspi: soft reset Blackghost on failure to resume 



BGCOM driver tries for 2ms to resume BG. On failure to resume
BGCOM soft resets BG to recover.

Change-Id: Ia7d3965c8ccdb188f7cf16cad256be9bae9e3c51
Signed-off-by: default avatarAjit Kumar <kajit@codeaurora.org>
parent 9fa863fa

drivers/soc/qcom/bgcom_interface.c

+3 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <soc/qcom/subsystem_notif.h>

#include "bgcom.h"

#include "linux/bgcom_interface.h"

#include "bgcom_interface.h"

#include <linux/of.h>

#include <linux/of_gpio.h>

#include <linux/gpio.h>
@@ -176,7 +177,7 @@ static int bgchar_write_cmd(struct bg_ui_data *fui_obj_msg, int type) 
	return ret;

}



static int bg_soft_reset(void)

int bg_soft_reset(void)

{

	/*pull down reset gpio */

	gpio_direction_output(bgreset_gpio, 0);
@@ -184,6 +185,7 @@ static int bg_soft_reset(void) 
	gpio_set_value(bgreset_gpio, 1);

	return 0;

}

EXPORT_SYMBOL(bg_soft_reset);



static long bg_com_ioctl(struct file *filp,

		unsigned int ui_bgcom_cmd, unsigned long arg)

drivers/soc/qcom/bgcom_interface.h

0 → 100644
+22 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2018, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#ifndef BGCOM_INTERFACE_H

#define BGCOM_INTERFACE_H



/**

 * bg_soft_reset() - soft reset Blackghost

 * Return 0 on success or -Ve on error

*/

int bg_soft_reset(void);



#endif /* BGCOM_INTERFACE_H */

drivers/soc/qcom/bgcom_spi.c

+8 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/kthread.h>

#include "bgcom.h"

#include "bgrsb.h"

#include "bgcom_interface.h"



#define BG_SPI_WORD_SIZE (0x04)

#define BG_SPI_READ_LEN (0x04)
@@ -783,8 +784,14 @@ int bgcom_resume(void *handle) 


unlock:

	mutex_unlock(&bg_resume_mutex);

	if (retry == MAX_RETRY) {

		/* BG failed to resume. Trigger BG soft reset. */

		pr_err("BG failed to resume\n");

		bg_soft_reset();

		return -ETIMEDOUT;

	}

	pr_info("BG retries for wake up : %d\n", retry);

	return (retry == MAX_RETRY ? -ETIMEDOUT : 0);

	return 0;

}

EXPORT_SYMBOL(bgcom_resume);