gpio: uapi: use 0xB4 as ioctl() major

The previous 'o' is in conflict and not very orderly assigned.
We want to select an ioctl() major that does not conflict with
the existining ones.

Add the new reserved major (0xB4) to Documentation/ioctl/ioctl-number.txt

Fixes: 3c702e9987e2 ("gpio: add a userspace chardev ABI for GPIOs")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

2 files changed, 3 insertions, 2 deletions

diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 91261a32a573..9369d3b0f09a 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -319,6 +319,7 @@ Code  Seq#(hex)	Include File		Comments
                                         <mailto:vgo@ratio.de>
 0xB1    00-1F   PPPoX                   <mailto:mostrows@styx.uwaterloo.ca>
 0xB3    00      linux/mmc/ioctl.h
+0xB4    00-0F   linux/gpio.h            <mailto:linux-gpio@vger.kernel.org>
 0xC0    00-0F   linux/usb/iowarrior.h
 0xCA    00-0F   uapi/misc/cxl.h
 0xCA    80-8F   uapi/scsi/cxlflash_ioctl.h
diff --git a/include/uapi/linux/gpio.h b/include/uapi/linux/gpio.h
index dfe8ade2742d..d0a3cac72250 100644
--- a/include/uapi/linux/gpio.h
+++ b/include/uapi/linux/gpio.h
@@ -52,7 +52,7 @@ struct gpioline_info {
         char consumer[32];
 };
 
-#define GPIO_GET_CHIPINFO_IOCTL _IOR('o', 0x01, struct gpiochip_info)
-#define GPIO_GET_LINEINFO_IOCTL _IOWR('o', 0x02, struct gpioline_info)
+#define GPIO_GET_CHIPINFO_IOCTL _IOR(0xB4, 0x01, struct gpiochip_info)
+#define GPIO_GET_LINEINFO_IOCTL _IOWR(0xB4, 0x02, struct gpioline_info)
 
 #endif /* _UAPI_GPIO_H_ */