aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm2708/patches-4.19/950-0635-driver-char-rpivid-also-support-legacy-name.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0635-driver-char-rpivid-also-support-legacy-name.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0635-driver-char-rpivid-also-support-legacy-name.patch71
1 files changed, 71 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0635-driver-char-rpivid-also-support-legacy-name.patch b/target/linux/brcm2708/patches-4.19/950-0635-driver-char-rpivid-also-support-legacy-name.patch
new file mode 100644
index 0000000000..34dd24208c
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0635-driver-char-rpivid-also-support-legacy-name.patch
@@ -0,0 +1,71 @@
+From 80c20ff00542b050733780ae6088e50663ee8d78 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 29 Jul 2019 12:03:21 +0100
+Subject: [PATCH] driver: char: rpivid - also support legacy name
+
+Provide transitional support for the previous names of
+the character devices.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/char/broadcom/rpivid-mem.c | 22 ++++++++++++++++++----
+ 1 file changed, 18 insertions(+), 4 deletions(-)
+
+--- a/drivers/char/broadcom/rpivid-mem.c
++++ b/drivers/char/broadcom/rpivid-mem.c
+@@ -66,7 +66,7 @@ static int rpivid_mem_open(struct inode
+ int dev = iminor(inode);
+ int ret = 0;
+ struct rpivid_mem_priv *priv;
+- if (dev != DEVICE_MINOR)
++ if (dev != DEVICE_MINOR && dev != DEVICE_MINOR + 1)
+ ret = -ENXIO;
+
+ priv = container_of(inode->i_cdev, struct rpivid_mem_priv,
+@@ -82,7 +82,7 @@ static int rpivid_mem_release(struct ino
+ int dev = iminor(inode);
+ int ret = 0;
+
+- if (dev != DEVICE_MINOR)
++ if (dev != DEVICE_MINOR && dev != DEVICE_MINOR + 1)
+ ret = -ENXIO;
+
+ return ret;
+@@ -167,14 +167,14 @@ static int rpivid_mem_probe(struct platf
+ /* Create character device entries */
+
+ err = alloc_chrdev_region(&priv->devid,
+- DEVICE_MINOR, 1, priv->name);
++ DEVICE_MINOR, 2, priv->name);
+ if (err != 0) {
+ dev_err(priv->dev, "unable to allocate device number");
+ goto failed_alloc_chrdev;
+ }
+ cdev_init(&priv->rpivid_mem_cdev, &rpivid_mem_fops);
+ priv->rpivid_mem_cdev.owner = THIS_MODULE;
+- err = cdev_add(&priv->rpivid_mem_cdev, priv->devid, 1);
++ err = cdev_add(&priv->rpivid_mem_cdev, priv->devid, 2);
+ if (err != 0) {
+ dev_err(priv->dev, "unable to register device");
+ goto failed_cdev_add;
+@@ -194,6 +194,20 @@ static int rpivid_mem_probe(struct platf
+ if (IS_ERR(ptr_err))
+ goto failed_device_create;
+
++ /* Legacy alias */
++ {
++ char *oldname = kstrdup(priv->name, GFP_KERNEL);
++
++ oldname[1] = 'a';
++ oldname[2] = 'r';
++ oldname[3] = 'g';
++ oldname[4] = 'o';
++ oldname[5] = 'n';
++ (void)device_create(priv->class, NULL, priv->devid + 1, NULL,
++ oldname + 1);
++ kfree(oldname);
++ }
++
+ dev_info(priv->dev, "%s initialised: Registers at 0x%08lx length 0x%08lx",
+ priv->name, priv->regs_phys, priv->mem_window_len);
+