1 files changed, 0 insertions, 105 deletions
diff --git a/target/linux/layerscape/patches-4.4/8233-i2c-pca954x-Add-option-to-skip-disabling-PCA954x-Mux.patch b/target/linux/layerscape/patches-4.4/8233-i2c-pca954x-Add-option-to-skip-disabling-PCA954x-Mux.patch
deleted file mode 100644
index 3cb3976..0000000
--- a/target/linux/layerscape/patches-4.4/8233-i2c-pca954x-Add-option-to-skip-disabling-PCA954x-Mux.patch
+++ /dev/null
@@ -1,105 +0,0 @@
-From a4be9046c3a3fc39a06089553df8cc19a2abd814 Mon Sep 17 00:00:00 2001
-From: Priyanka Jain <Priyanka.Jain@freescale.com>
-Date: Tue, 3 Nov 2015 11:25:24 +0530
-Subject: [PATCH 233/238] i2c: pca954x: Add option to skip disabling PCA954x
- Mux device
-
-On some Layerscape boards like LS2085ARDB/LS2080ARDB,
-input pull-up resistors on PCA954x Mux device are
-missing on board. So, if mux are disabled after powered-on,
-input lines will float leading to incorrect functionality.
-
-Hence, PCA954x Mux device should never be turned-off after
-power-on.
-
-Add option to skip disabling PCA954x Mux device
-if device tree contians "i2c-mux-never-disable" property
-for pca954x device node.
-
-Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>
----
- drivers/i2c/muxes/i2c-mux-pca954x.c |   38 +++++++++++++++++++++++++++++++++++
- 1 file changed, 38 insertions(+)
-
---- a/drivers/i2c/muxes/i2c-mux-pca954x.c
-+++ b/drivers/i2c/muxes/i2c-mux-pca954x.c
-@@ -63,6 +63,7 @@ struct pca954x {
- 	struct i2c_adapter *virt_adaps[PCA954X_MAX_NCHANS];
- 
- 	u8 last_chan;		/* last register value */
-+	u8 disable_mux;		/* do not disable mux if val not 0 */
- };
- 
- struct chip_desc {
-@@ -174,6 +175,13 @@ static int pca954x_deselect_mux(struct i
- {
- 	struct pca954x *data = i2c_get_clientdata(client);
- 
-+#ifdef CONFIG_ARCH_LAYERSCAPE
-+	if (data->disable_mux != 0)
-+		data->last_chan = chips[data->type].nchans;
-+	else
-+		data->last_chan = 0;
-+	return pca954x_reg_write(adap, client, data->disable_mux);
-+#endif
- 	/* Deselect active channel */
- 	data->last_chan = 0;
- 	return pca954x_reg_write(adap, client, data->last_chan);
-@@ -201,6 +209,23 @@ static int pca954x_probe(struct i2c_clie
- 	if (!data)
- 		return -ENOMEM;
- 
-+#ifdef CONFIG_ARCH_LAYERSCAPE
-+	/* The point here is that you must not disable a mux if there
-+	 * are no pullups on the input or you mess up the I2C. This
-+	 * needs to be put into the DTS really as the kernel cannot
-+	 * know this otherwise.
-+	 */
-+	data->type = id->driver_data;
-+	data->disable_mux = of_node &&
-+		of_property_read_bool(of_node, "i2c-mux-never-disable") &&
-+		chips[data->type].muxtype == pca954x_ismux ?
-+		chips[data->type].enable : 0;
-+	/* force the first selection */
-+	if (data->disable_mux != 0)
-+		data->last_chan = chips[data->type].nchans;
-+	else
-+		data->last_chan = 0;
-+#endif
- 	i2c_set_clientdata(client, data);
- 
- 	/* Get the mux out of reset if a reset GPIO is specified. */
-@@ -212,13 +237,19 @@ static int pca954x_probe(struct i2c_clie
- 	 * that the mux is in fact present. This also
- 	 * initializes the mux to disconnected state.
- 	 */
-+#ifdef CONFIG_ARCH_LAYERSCAPE
-+	if (i2c_smbus_write_byte(client, data->disable_mux) < 0) {
-+#else
- 	if (i2c_smbus_write_byte(client, 0) < 0) {
-+#endif
- 		dev_warn(&client->dev, "probe failed\n");
- 		return -ENODEV;
- 	}
- 
-+#ifndef CONFIG_ARCH_LAYERSCAPE
- 	data->type = id->driver_data;
- 	data->last_chan = 0;		   /* force the first selection */
-+#endif
- 
- 	idle_disconnect_dt = of_node &&
- 		of_property_read_bool(of_node, "i2c-mux-idle-disconnect");
-@@ -289,6 +320,13 @@ static int pca954x_resume(struct device
- 	struct i2c_client *client = to_i2c_client(dev);
- 	struct pca954x *data = i2c_get_clientdata(client);
- 
-+#ifdef CONFIG_ARCH_LAYERSCAPE
-+	if (data->disable_mux != 0)
-+		data->last_chan = chips[data->type].nchans;
-+	else
-+		data->last_chan = 0;
-+	return i2c_smbus_write_byte(client, data->disable_mux);
-+#endif
- 	data->last_chan = 0;
- 	return i2c_smbus_write_byte(client, 0);
- }