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ASoC: wcd937x_slave: Add retry while getting logical addr for wcd937x slave

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Add retry while getting logical addr for wcd937x slave.

Change-Id: Iff3f6a071c13f8bdccc72da69e95432be2d4f90a
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>
This commit is contained in:
Vatsal Bucha 2021-02-20 12:39:35 +05:30 • committed by Gerrit - the friendly Code Review server
commit c455f79f85
1 changed files with 10 additions and 2 deletions
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12
asoc/codecs/wcd937x/wcd937x_slave.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
* Copyright (c) 2018, 2021, The Linux Foundation. All rights reserved.
*/
#include <linux/module.h>
@ -11,6 +11,8 @@
#include <linux/component.h>
#include <soc/soundwire.h>
#define SWR_MAX_RETRY 5
struct wcd937x_slave_priv {
struct swr_device *swr_slave;
};
@ -22,6 +24,7 @@ static int wcd937x_slave_bind(struct device *dev,
struct wcd937x_slave_priv *wcd937x_slave = NULL;
uint8_t devnum = 0;
struct swr_device *pdev = to_swr_device(dev);
int retry = SWR_MAX_RETRY;
if (pdev == NULL) {
dev_err(dev, "%s: pdev is NULL\n", __func__);
@ -37,7 +40,12 @@ static int wcd937x_slave_bind(struct device *dev,
wcd937x_slave->swr_slave = pdev;
ret = swr_get_logical_dev_num(pdev, pdev->addr, &devnum);
do {
/* Add delay for soundwire enumeration */
usleep_range(100, 110);
ret = swr_get_logical_dev_num(pdev, pdev->addr, &devnum);
} while (ret && --retry);
if (ret) {
dev_dbg(&pdev->dev,
"%s get devnum %d for dev addr %lx failed\n",