linux-kernel - [PATCH] mfd: Support additional parent IDs for wm831x

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Message-Id: <1291307143-8472-1-git-send-email-broonie@opensource.wolfsonmicro.com>
Date:	Thu,  2 Dec 2010 16:25:43 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	stable@...nel.org
Subject: [PATCH] mfd: Support additional parent IDs for wm831x

Some newer device revisions add a second parent ID. Support this in
the device validity checks done at startup.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc: stable@...nel.org
---
 drivers/mfd/wm831x-core.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 47b58cc..3fe9a58 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1455,7 +1455,11 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
 		dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
 		goto err;
 	}
-	if (ret != 0x6204) {
+	switch (ret) {
+	case 0x6204:
+	case 0x6246:
+		break;
+	default:
 		dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
 		ret = -EINVAL;
 		goto err;
-- 
1.7.1

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