linux-kernel - [PATCH] I2C: busses: Do not print error message in syslog if no ACK received

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Date:	Tue, 12 Nov 2013 18:45:36 +0100
From:	Andreas Werner <wernerandy@....de>
To:	wsa@...-dreams.de
Cc:	jacmet@...site.dk, marex@...x.de, baohua.song@....com,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	wernerandy@....de
Subject: [PATCH] I2C: busses: Do not print error message in syslog if no ACK received

Using the i2c-eg20t driver and call i2cdetect or probe on the bus,
the driver will print a lot of error messages if there was no ACK
received.

i2cdetect normally print a table with all the available devices. If there
is no device on the address, the table will be empty.
Currently with the i2c-eg20t driver, the table is not visible because
the error messages destroy the table.

Error message: pch_i2c_getack return -71

This patch prevent the driver to print the messages to syslog if debug is not set.

Tested on Intel Atom E6xx and Eg20t Chipset.

Signed-off-by: Andreas Werner <wernerandy@....de>
---
 drivers/i2c/busses/i2c-eg20t.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index 0f37529..b10c651 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -322,7 +322,7 @@ static s32 pch_i2c_getack(struct i2c_algo_pch_data *adap)
 	reg_val = ioread32(p + PCH_I2CSR) & PCH_GETACK;
 
 	if (reg_val != 0) {
-		pch_err(adap, "return%d\n", -EPROTO);
+		pch_dbg(adap, "return%d\n", -EPROTO);
 		return -EPROTO;
 	}
 
-- 
1.8.4

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