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authorTony Lindgren <tony@atomide.com>2018-07-05 12:10:15 +0300
committerLinus Walleij <linus.walleij@linaro.org>2018-07-17 11:48:47 +0300
commitf913cfce4ee49a3382a9ff95696f49a46e56e974 (patch)
tree45cff803256ae9aed98bcb5b155b3402d516c4fb /drivers/pinctrl/pinmux.c
parenta203728ac6bbbed2fdcf0a2e807c5473efcfdb30 (diff)
downloadlinux-f913cfce4ee49a3382a9ff95696f49a46e56e974.tar.xz
pinctrl: pinmux: Return selector to the pinctrl driver
We must return the selector from pinmux_generic_add_function() so pin controller device drivers can remove the right group if needed for deferred probe for example. And we now must make sure that a proper name is passed so we can use it to check if the entry already exists. Note that fixes are also needed for the pin controller drivers to use the selector value. Fixes: a76edc89b100 ("pinctrl: core: Add generic pinctrl functions for managing groups") Reported-by: H. Nikolaus Schaller <hns@goldelico.com> Cc: Christ van Willegen <cvwillegen@gmail.com> Cc: Haojian Zhuang <haojian.zhuang@linaro.org> Cc: Jacopo Mondi <jacopo+renesas@jmondi.org> Cc: Paul Cercueil <paul@crapouillou.net> Cc: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Tested-By: H. Nikolaus Schaller <hns@goldelico.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinmux.c')
-rw-r--r--drivers/pinctrl/pinmux.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index d7c5b4abd741..5780442c068b 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -307,7 +307,6 @@ static int pinmux_func_name_to_selector(struct pinctrl_dev *pctldev,
selector++;
}
- dev_err(pctldev->dev, "function '%s' not supported\n", function);
return -EINVAL;
}
@@ -774,6 +773,16 @@ int pinmux_generic_add_function(struct pinctrl_dev *pctldev,
void *data)
{
struct function_desc *function;
+ int selector;
+
+ if (!name)
+ return -EINVAL;
+
+ selector = pinmux_func_name_to_selector(pctldev, name);
+ if (selector >= 0)
+ return selector;
+
+ selector = pctldev->num_functions;
function = devm_kzalloc(pctldev->dev, sizeof(*function), GFP_KERNEL);
if (!function)
@@ -784,12 +793,11 @@ int pinmux_generic_add_function(struct pinctrl_dev *pctldev,
function->num_group_names = num_groups;
function->data = data;
- radix_tree_insert(&pctldev->pin_function_tree, pctldev->num_functions,
- function);
+ radix_tree_insert(&pctldev->pin_function_tree, selector, function);
pctldev->num_functions++;
- return 0;
+ return selector;
}
EXPORT_SYMBOL_GPL(pinmux_generic_add_function);