[PATCH v4 5/6] i2c: at91: print hardware version

[Cyrille Pitchen]

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

Signed-off-by: Cyrille Pitchen <cyrille.pitchen at atmel.com>
---
 drivers/i2c/busses/i2c-at91.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index 67b4f15..cbe6684 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;
@@ -872,6 +874,8 @@ static int at91_twi_probe(struct platform_device *pdev)
 			return rc;
 	}
 
+	dev_info(dev->dev, "version: %#x\n", at91_twi_read(dev, AT91_TWI_VER));
+
 	rc = of_property_read_u32(dev->dev->of_node, "clock-frequency",
 			&bus_clk_rate);
 	if (rc)
-- 
1.8.2.2