diff options
Diffstat (limited to 'Documentation/gpio/drivers-on-gpio.txt')
| -rw-r--r-- | Documentation/gpio/drivers-on-gpio.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/gpio/drivers-on-gpio.txt b/Documentation/gpio/drivers-on-gpio.txt index f6121328630f..14bf95a13bae 100644 --- a/Documentation/gpio/drivers-on-gpio.txt +++ b/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. |