clear-pkgs-linux-iot-lts2018/0394-ASoC-tdf8532-Add-delay-while-reading-a-packet-from-I.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Gogineni, GiribabuX" <giribabux.gogineni@intel.com>
Date: Tue, 2 Jan 2018 23:53:39 +0530
Subject: [PATCH] ASoC: tdf8532: Add delay while reading a packet from I2C

While doing the continuous play and stop, the codec
may not be ready for I2C reading after successive writes.
This triggers BE failure, because I2C reading value is incorrect.
Fix this by adding 10ms delay to ensure the smooth I2C read and write.

Change-Id: If918e263bc799fecc2c807229f5b4b165e011fa6
Signed-off-by: Gogineni, GiribabuX <giribabux.gogineni@intel.com>
Reviewed-on:
Reviewed-by: Shaik, Kareem M <kareem.m.shaik@intel.com>
Reviewed-by: Sinha, Mohit <mohit.sinha@intel.com>
Reviewed-by: Nc, Shreyas <shreyas.nc@intel.com>
Reviewed-by: Periyasamy, SriramX <sriramx.periyasamy@intel.com>
Reviewed-by: Kale, Sanyog R <sanyog.r.kale@intel.com>
Tested-by: Sm, Bhadur A <bhadur.a.sm@intel.com>
---
 sound/soc/codecs/tdf8532.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/codecs/tdf8532.c b/sound/soc/codecs/tdf8532.c
index e723ffebed0f..a5e2a028338c 100644
--- a/sound/soc/codecs/tdf8532.c
+++ b/sound/soc/codecs/tdf8532.c
@@ -90,6 +90,7 @@ static uint8_t tdf8532_read_wait_ack(struct tdf8532_priv *dev_data,
 	unsigned long timeout_point = jiffies + timeout;
 	int ret;
 
+	usleep_range(10000,20000);
 	do {
 		ret = i2c_master_recv(dev_data->i2c, ack_repl, HEADER_SIZE);
 		if (ret < 0)
-- 
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