From: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Date: Tue, 9 Jun 2015 16:22:18 +0000 (+0200)
Subject: i2c: at91: print hardware version
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6ce461ea504b0c5eb011b1acccd38fdc28e812ad;p=linux-beck.git

i2c: at91: print hardware version

The probe() function now prints the hardware version of the I2C
controller.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
[wsa: s/version/hw version/] for clarity]
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
---

diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index 817ae69cd1fb..abd93f3a05a0 100644
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -85,6 +85,8 @@
 #define	AT91_TWI_ACR_DATAL(len)	((len) & 0xff)
 #define	AT91_TWI_ACR_DIR	BIT(8)
 
+#define	AT91_TWI_VER		0x00fc	/* Version Register */
+
 struct at91_twi_pdata {
 	unsigned clk_max_div;
 	unsigned clk_offset;
@@ -908,7 +910,8 @@ static int at91_twi_probe(struct platform_device *pdev)
 		return rc;
 	}
 
-	dev_info(dev->dev, "AT91 i2c bus driver.\n");
+	dev_info(dev->dev, "AT91 i2c bus driver (hw version: %#x).\n",
+		 at91_twi_read(dev, AT91_TWI_VER));
 	return 0;
 }