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 817ae69cd1fbf5071c31d8f60d8c19027305f085..abd93f3a05a03f2a083b68a7ab92c4c97f80c32b 100644 (file)
--- 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;
 }