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Commit 18b55cca authored by Ganesh Keethol's avatar Ganesh Keethol
Browse files

soc: qcom: bgcom: use pm_runtime_status_suspended of spi 



use pm_runtime_status_suspended of spi driver to confirm if
spi resource is released.

Change-Id: Id343077983645869222393ea7debf3c121b885fa
Signed-off-by: default avatarGanesh Keethol <gkeethol@codeaurora.org>
parent a7220f4d

drivers/soc/qcom/bgcom_interface.c

+0 −5
Original line number Diff line number Diff line
@@ -45,7 +45,6 @@ 


#define MPPS_DOWN_EVENT_TO_BG_TIMEOUT 3000

#define ADSP_DOWN_EVENT_TO_BG_TIMEOUT 3000

#define SLEEP_FOR_SPI_BUS 2000



enum {

	SSR_DOMAIN_BG,
@@ -401,8 +400,6 @@ static long bg_com_ioctl(struct file *filp, 
		break;

	case SET_SPI_BUSY:

		ret = bgcom_set_spi_state(BGCOM_SPI_BUSY);

		/* Add sleep for  SPI Bus to release*/

		msleep(SLEEP_FOR_SPI_BUS);

		break;

	case BG_SOFT_RESET:

		ret = bg_soft_reset();
@@ -616,8 +613,6 @@ static int ssr_bg_cb(struct notifier_block *this, 
		send_uevent(&bge);

		break;

	case SUBSYS_AFTER_SHUTDOWN:

		/* Add sleep for  SPI Bus to release*/

		msleep(SLEEP_FOR_SPI_BUS);

		if (dev->pending_bg_twm_wear_load) {

			/* Load bg-twm-wear */

			dev->pending_bg_twm_wear_load = false;

drivers/soc/qcom/bgcom_spi.c

+14 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/of_gpio.h>

#include <linux/kthread.h>

#include <linux/dma-mapping.h>

#include <linux/pm_runtime.h>

#include "bgcom.h"

#include "bgrsb.h"

#include "bgcom_interface.h"
@@ -160,6 +161,10 @@ int bgcom_set_spi_state(enum bgcom_spi_state state) 
{

	struct bg_spi_priv *bg_spi = container_of(bg_com_drv,

						struct bg_spi_priv, lhandle);

	struct device spi_dev = bg_spi->spi->master->dev;

	ktime_t time_start, delta;

	s64 time_elapsed;



	if (state < 0 || state > 1)

		return -EINVAL;
@@ -167,6 +172,15 @@ int bgcom_set_spi_state(enum bgcom_spi_state state) 
		return 0;



	mutex_lock(&bg_spi->xfer_mutex);

	if (state == BGCOM_SPI_BUSY) {

		time_start = ktime_get();

		while (!pm_runtime_status_suspended(spi_dev.parent)) {

			delta = ktime_sub(ktime_get(), time_start);

			time_elapsed = ktime_to_ms(delta);

			BUG_ON(time_elapsed > 5 * MSEC_PER_SEC);

			msleep(100);

		}

	}

	spi_state = state;

	mutex_unlock(&bg_spi->xfer_mutex);

	return 0;