Doc: gpio: Fix typos in Documentation/gpio

This patch fix some spelling typos found in Documentation/gpio.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/gpio/consumer.txt

@@ -260,7 +260,7 @@ will be driven low.
 
 To summarize:
 
-Function (example)               active-low proporty  physical line
+Function (example)               active-low property  physical line
 gpiod_set_raw_value(desc, 0);        don't care           low
 gpiod_set_raw_value(desc, 1);        don't care           high
 gpiod_set_value(desc, 0);       default (active-high)     low

Documentation/gpio/driver.txt

@@ -113,8 +113,8 @@ GPIO irqchips usually fall in one of two categories:
   it will be threaded IRQ handler on -RT and hard IRQ handler on non-RT
   (for example, see [3]).
   Know W/A: The generic_handle_irq() is expected to be called with IRQ disabled,
-  so IRQ core will complain if it will be called from IRQ handler wich is forced
-  thread. The "fake?" raw lock can be used to W/A this problem:
+  so IRQ core will complain if it will be called from IRQ handler which is
+  forced thread. The "fake?" raw lock can be used to W/A this problem:
 
 	raw_spinlock_t wa_lock;
 	static irqreturn_t omap_gpio_irq_handler(int irq, void *gpiobank)
@@ -224,7 +224,7 @@ Real-Time compliance for GPIO IRQ chips
 ---------------------------------------
 
 Any provider of irqchips needs to be carefully tailored to support Real Time
-preemption. It is desireable that all irqchips in the GPIO subsystem keep this
+preemption. It is desirable that all irqchips in the GPIO subsystem keep this
 in mind and does the proper testing to assure they are real time-enabled.
 So, pay attention on above " RT_FULL:" notes, please.
 The following is a checklist to follow when preparing a driver for real

Documentation/gpio/drivers-on-gpio.txt

@@ -54,7 +54,7 @@ hardware descriptions such as device tree or ACPI:
   drivers for the I2C devices on the bus like any other I2C bus driver.
 
 - spi_gpio: drivers/spi/spi-gpio.c is used to drive an SPI bus (variable number
-  of wires, atleast SCK and optionally MISO, MOSI and chip select lines) using
+  of wires, at least SCK and optionally MISO, MOSI and chip select lines) using
   GPIO hammering (bitbang). It will appear as any other SPI bus on the system
   and makes it possible to connect drivers for SPI devices on the bus like
   any other SPI bus driver. For example any MMC/SD card can then be connected
@@ -75,7 +75,7 @@ hardware descriptions such as device tree or ACPI:
 
 - gpio-wdt: drivers/watchdog/gpio_wdt.c is used to provide a watchdog timer
   that will periodically "ping" a hardware connected to a GPIO line by toggling
-  it from 1-to-0-to-1. If that hardware does not recieve its "ping"
+  it from 1-to-0-to-1. If that hardware does not receive its "ping"
   periodically, it will reset the system.
 
 - gpio-nand: drivers/mtd/nand/gpio.c is used to connect a NAND flash chip to
@@ -91,5 +91,5 @@ usually connected directly to the flash.
 
 Use those instead of talking directly to the GPIOs using sysfs; they integrate
 with kernel frameworks better than your userspace code could. Needless to say,
-just using the apropriate kernel drivers will simplify and speed up your
+just using the appropriate kernel drivers will simplify and speed up your
 embedded hacking in particular by providing ready-made components.