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authorLinus Walleij <linus.walleij@linaro.org>2015-05-13 13:03:21 +0200
committerLinus Walleij <linus.walleij@linaro.org>2015-05-14 12:19:48 +0200
commitaf6c235d1a5c112964c3029eb0ed4b52c7aa33bf (patch)
tree393b8dceec3cd64bfae6d60dbb75139adf2a9487 /include/linux/gpio
parent25e4fe92a20bbffde87500615250f1d54bfb832f (diff)
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gpio: discourage passing base to gpio_chip
Passing a fixed base in struct gpio_chip is done for legacy systems that cannot handle dynamic allocation. Discourage this behaviour in the kerneldoc. Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/gpio')
-rw-r--r--include/linux/gpio/driver.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 96a678842cde..cc7ec129b329 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -42,8 +42,12 @@ struct seq_file;
* @dbg_show: optional routine to show contents in debugfs; default code
* will be used when this is omitted, but custom code can show extra
* state (such as pullup/pulldown configuration).
- * @base: identifies the first GPIO number handled by this chip; or, if
- * negative during registration, requests dynamic ID allocation.
+ * @base: identifies the first GPIO number handled by this chip;
+ * or, if negative during registration, requests dynamic ID allocation.
+ * DEPRECATION: providing anything non-negative and nailing the base
+ * base offset of GPIO chips is deprecated. Please pass -1 as base to
+ * let gpiolib select the chip base in all possible cases. We want to
+ * get rid of the static GPIO number space in the long run.
* @ngpio: the number of GPIOs handled by this controller; the last GPIO
* handled is (base + ngpio - 1).
* @desc: array of ngpio descriptors. Private.