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