History

minor gpio doc update

Fix doc bug noted by Uwe Kleine-König: gpio_set_direction() is long gone, replaced by gpio_direction_input() and gpio_direction_output().

David Brownell committed 19 years ago

Commit be1ff381 parent 6570c451 file · +2 −2Browse files

Unified · Split

Documentation/gpio.txt+2−2
@@ -148,7 +148,7 @@ pin ... that won't always match the specified output value, because of · 147 unmodified lines
148148 issues including wire-OR and output latencies.
149149
150150 The get/set calls have no error returns because "invalid GPIO" should have
151−been reported earlier in gpio_set_direction(). However, note that not all
151+been reported earlier from gpio_direction_*(). However, note that not all
152152 platforms can read the value of output pins; those that can't should always
153153 return zero. Also, using these calls for GPIOs that can't safely be accessed
154154 without sleeping (see below) is an error.
@@ -239,7 +239,7 @@ map between them using calls like: · 84 unmodified lines
239239 Those return either the corresponding number in the other namespace, or
240240 else a negative errno code if the mapping can't be done. (For example,
241241 some GPIOs can't used as IRQs.) It is an unchecked error to use a GPIO
242−number that hasn't been marked as an input using gpio_set_direction(), or
242+number that wasn't set up as an input using gpio_direction_input(), or
243243 to use an IRQ number that didn't originally come from gpio_to_irq().
244244
245245 These two mapping calls are expected to cost on the order of a single