mfd: wm8994: Read CUST_ID from the device

PATCH New Mark Brown 1 participant 1 message Mar 26, 2012

Subsystems (2)

Multifunction devices (MFD) Wolfson microelectronics drivers

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Mark Brown

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2012-03-26 15:12 UTC #0 lore raw

PATCH 1/1 mfd: wm8994: Read CUST_ID from the device

Read CUST_ID from the device and log it for diagnostics.

Signed-off-by Mark Brown <[email protected]>

---
 drivers/mfd/wm8994-core.c            |    7 ++++---
 include/linux/mfd/wm8994/core.h      |    1 +
 include/linux/mfd/wm8994/registers.h |    3 +++
 3 files changed, 8 insertions(+), 3 deletions(-)

drivers/mfd/wm8994-core.c +4 -3

index 9d7ca1e..60e61754 100644
@@ -500,7 +500,8 @@ static __devinit int wm8994_device_init(struct wm8994 *wm8994, int irq)
 			ret);
 		goto err_enable;
 	}
-	wm8994->revision = ret;
+	wm8994->revision = ret & WM8994_CHIP_REV_MASK;
+	wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT;
 
 	switch (wm8994->type) {
 	case WM8994:

@@ -553,8 +554,8 @@ static __devinit int wm8994_device_init(struct wm8994 *wm8994, int irq)
 		break;
 	}
 
-	dev_info(wm8994->dev, "%s revision %c\n", devname,
-		 'A' + wm8994->revision);
+	dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname,
+		 'A' + wm8994->revision, wm8994->cust_id);
 
 	switch (wm8994->type) {
 	case WM1811:

include/linux/mfd/wm8994/core.h +1 -0

index 9eff2a3..d41bc7b 100644
@@ -57,6 +57,7 @@ struct wm8994 {
 
 	enum wm8994_type type;
 	int revision;
+	int cust_id;
 
 	struct device *dev;
 	struct regmap *regmap;

include/linux/mfd/wm8994/registers.h +3 -0

index 86e6a03..0535489 100644
@@ -2212,6 +2212,9 @@
 /*
  * R256 (0x100) - Chip Revision
  */
+#define WM8994_CUST_ID_MASK                     0xFF00  /* CUST_ID - [15:8] */
+#define WM8994_CUST_ID_SHIFT                         8  /* CUST_ID - [15:8] */
+#define WM8994_CUST_ID_WIDTH                         8  /* CUST_ID - [15:8] */
 #define WM8994_CHIP_REV_MASK                    0x000F  /* CHIP_REV - [3:0] */
 #define WM8994_CHIP_REV_SHIFT                        0  /* CHIP_REV - [3:0] */
 #define WM8994_CHIP_REV_WIDTH                        4  /* CHIP_REV - [3:0] */

Signature · 1 line

1.7.9.1