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gpio: create an API to detect open drain/source on lines

Forráskód böngészése 
My left hand merges code to privatize the descriptor handling
while my right hand merges drivers that poke around and
disrespect with the same gpiolib internals.

So let's expose the proper APIs for drivers to ask the gpiolib
core if a line is marked as open drain or open source and
get some order around things so this driver compiles again.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Nicolas Saenz Julienne <nicolassaenzj@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij
2016-02-16 15:41:42 +01:00
szülő d6f434e858
commit 143b65d677
3 fájl változott, egészen pontosan 26 új sor hozzáadva és 5 régi sor törölve
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpio/gpio-tps65218.c
Fájl megtekintése

@@ -71,17 +71,16 @@ static int tps65218_gpio_request(struct gpio_chip *gc, unsigned offset)
{
struct tps65218_gpio *tps65218_gpio = gpiochip_get_data(gc);
struct tps65218 *tps65218 = tps65218_gpio->tps65218;
unsigned long flags = gc->desc[offset].flags;
int ret;
if (flags & FLAG_OPEN_SOURCE) {
if (gpiochip_line_is_open_source(gc, offset)) {
dev_err(gc->parent, "can't work as open source\n");
return -EINVAL;
}
switch (offset) {
case 0:
if (!(flags & FLAG_OPEN_DRAIN)) {
if (!gpiochip_line_is_open_drain(gc, offset)) {
dev_err(gc->parent, "GPO1 works only as open drain\n");
return -EINVAL;
}
@@ -103,7 +102,7 @@ static int tps65218_gpio_request(struct gpio_chip *gc, unsigned offset)
break;
case 1:
/* GP02 is push-pull by default, can be set as open drain. */
if (flags & FLAG_OPEN_DRAIN) {
if (gpiochip_line_is_open_drain(gc, offset)) {
ret = tps65218_clear_bits(tps65218,
TPS65218_REG_CONFIG1,
TPS65218_CONFIG1_GPO2_BUF,
@@ -122,7 +121,7 @@ static int tps65218_gpio_request(struct gpio_chip *gc, unsigned offset)
break;
case 2:
if (!(flags & FLAG_OPEN_DRAIN)) {
if (!gpiochip_line_is_open_drain(gc, offset)) {
dev_err(gc->parent, "GPO3 works only as open drain\n");
return -EINVAL;
}