From: Chris Packham <judge.packham@gmail.com>
Date: Thu, 28 Sep 2017 21:53:36 +0000 (+1300)
Subject: i2c: muxes: pca954x: look up width from chip_desc
X-Git-Url: http://git.dujemihanovic.xyz/img/static/gitweb.css?a=commitdiff_plain;h=5bc90a8953a902152bd640322ffc8111dccbe3ab;p=u-boot.git

i2c: muxes: pca954x: look up width from chip_desc

Commit 8e6eda7cda6c ("drivers/i2c/muxes/pca954x: Add pca9547 I2C mux
support") introduced a chip_desc for the pca954x devices but failed to
update pca954x_ofdata_to_platdata() to be aware of it. Make
pca954x_ofdata_to_platdata() lookup the chip_desc to validate the device
width.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Marek Behun <marek.behun@nic.cz>
---

diff --git a/drivers/i2c/muxes/pca954x.c b/drivers/i2c/muxes/pca954x.c
index 01ca1ff48d..2b70ff82bd 100644
--- a/drivers/i2c/muxes/pca954x.c
+++ b/drivers/i2c/muxes/pca954x.c
@@ -27,6 +27,7 @@ struct chip_desc {
 		pca954x_ismux = 0,
 		pca954x_isswi,
 	} muxtype;
+	u32 width;
 };
 
 struct pca954x_priv {
@@ -39,14 +40,17 @@ static const struct chip_desc chips[] = {
 	[PCA9544] = {
 		.enable = 0x4,
 		.muxtype = pca954x_ismux,
+		.width = 4,
 	},
 	[PCA9547] = {
 		.enable = 0x8,
 		.muxtype = pca954x_ismux,
+		.width = 8,
 	},
 	[PCA9548] = {
 		.enable = 0x8,
 		.muxtype = pca954x_isswi,
+		.width = 8,
 	},
 };
 
@@ -89,13 +93,14 @@ static const struct udevice_id pca954x_ids[] = {
 static int pca954x_ofdata_to_platdata(struct udevice *dev)
 {
 	struct pca954x_priv *priv = dev_get_priv(dev);
+	const struct chip_desc *chip = &chips[dev_get_driver_data(dev)];
 
 	priv->addr = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", 0);
 	if (!priv->addr) {
 		debug("MUX not found\n");
 		return -ENODEV;
 	}
-	priv->width = dev_get_driver_data(dev);
+	priv->width = chip->width;
 
 	if (!priv->width) {
 		debug("No I2C MUX width specified\n");