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pinctrl: avoid requesting the same pin for mux and gpio

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PD#142470: pinctrl: avoid requesting the same pin for mux and gpio

Change-Id: I768aa7d8ffa2792c14c7d932314328d2475c0574
Signed-off-by: xingyu.chen <xingyu.chen@amlogic.com>
This commit is contained in:
xingyu.chen
2017-06-05 16:16:52 +08:00
committed by Victor Wan
parent e0212b0843
commit 6f39c07cc6
1 changed files with 32 additions and 0 deletions
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32
drivers/amlogic/pinctrl/pinctrl-meson.c
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@@ -249,13 +249,35 @@ static int meson_pmx_request_gpio(struct pinctrl_dev *pcdev,
struct pinctrl_gpio_range *range,
unsigned int offset)
{
struct pin_desc *desc;
struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
desc = pin_desc_get(pcdev, offset);
if (desc->mux_owner) {
pr_info("%s is using the pin %s as pinmux\n",
desc->mux_owner, desc->name);
return -EINVAL;
}
meson_pmx_disable_other_groups(pc, offset, -1);
return 0;
}
static int meson_pmx_request(struct pinctrl_dev *pcdev, unsigned int offset)
{
struct pin_desc *desc;
desc = pin_desc_get(pcdev, offset);
if (desc->gpio_owner) {
pr_info("%s is using the pin %s as gpio\n",
desc->gpio_owner, desc->name);
return -EINVAL;
}
return 0;
}
static int meson_pmx_get_funcs_count(struct pinctrl_dev *pcdev)
{
struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
@@ -289,6 +311,7 @@ static const struct pinmux_ops meson_pmx_v1_ops = {
.get_function_name = meson_pmx_get_func_name,
.get_function_groups = meson_pmx_get_groups,
.gpio_request_enable = meson_pmx_request_gpio,
.request = meson_pmx_request,
};
static struct meson_desc_function *
@@ -356,8 +379,16 @@ static int meson_pmx_v2_request_gpio(struct pinctrl_dev *pcdev,
struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
const struct meson_desc_pin *pin;
struct meson_domain *domain;
struct pin_desc *desc;
int i;
desc = pin_desc_get(pcdev, offset);
if (desc->mux_owner) {
pr_info("%s is using the pin %s as pinmux\n",
desc->mux_owner, desc->name);
return -EINVAL;
}
for (i = 0; i < pc->data->num_pins; i++) {
pin = pc->data->meson_pins + i;
if (pin->pin.number == offset) {
@@ -383,6 +414,7 @@ static const struct pinmux_ops meson_pmx_v2_ops = {
.get_function_name = meson_pmx_get_func_name,
.get_function_groups = meson_pmx_get_groups,
.gpio_request_enable = meson_pmx_v2_request_gpio,
.request = meson_pmx_request,
};
static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,