linux-kernel - [PATCH v5 5/6] i2c: at91: print hardware version

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Message-ID: <2c63907f42c492b3ad8aa503359928f72d158765.1433348016.git.cyrille.pitchen@atmel.com>
Date:	Wed, 3 Jun 2015 18:25:21 +0200
From:	Cyrille Pitchen <cyrille.pitchen@...el.com>
To:	<ludovic.desroches@...el.com>, <nicolas.ferre@...el.com>,
	<linux-i2c@...r.kernel.org>, <wsa@...-dreams.de>
CC:	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <pawel.moll@....com>,
	<mark.rutland@....com>, <ijc+devicetree@...lion.org.uk>,
	<galak@...eaurora.org>, <robh+dt@...nel.org>,
	Cyrille Pitchen <cyrille.pitchen@...el.com>
Subject: [PATCH v5 5/6] i2c: at91: print hardware version

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

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com>
---
 drivers/i2c/busses/i2c-at91.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index 67b4f15..89a8e61 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 (version: %#x).\n",
+		 at91_twi_read(dev, AT91_TWI_VER));
 	return 0;
 }
 
-- 
1.8.2.2

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