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pinctrl: stm32: Move gpio_dev list filling outside probe()

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Move gpio_dev list filling outside probe() to speed-up U-boot
boot sequence execution. This list is populated only when needed.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrice Chotard 2018-12-03 10:52:50 +01:00 • committed by Tom Rini
parent e9e8d80d8c
commit 043550415b
1 changed files with 38 additions and 25 deletions
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63
drivers/pinctrl/pinctrl_stm32.c
View file

@ -54,6 +54,39 @@ static int stm32_pinctrl_get_af(struct udevice *dev, unsigned int offset)
return af;
}
static int stm32_populate_gpio_dev_list(struct udevice *dev)
{
struct stm32_pinctrl_priv *priv = dev_get_priv(dev);
struct udevice *gpio_dev;
struct udevice *child;
struct stm32_gpio_bank *gpio_bank;
int ret;
/*
* parse pin-controller sub-nodes (ie gpio bank nodes) and fill
* a list with all gpio device reference which belongs to the
* current pin-controller. This list is used to find pin_name and
* pin muxing
*/
list_for_each_entry(child, &dev->child_head, sibling_node) {
ret = uclass_get_device_by_name(UCLASS_GPIO, child->name,
&gpio_dev);
if (ret < 0)
continue;
gpio_bank = malloc(sizeof(*gpio_bank));
if (!gpio_bank) {
dev_err(dev, "Not enough memory\n");
return -ENOMEM;
}
gpio_bank->gpio_dev = gpio_dev;
list_add_tail(&gpio_bank->list, &priv->gpio_dev);
}
return 0;
}
static int stm32_pinctrl_get_pins_count(struct udevice *dev)
{
struct stm32_pinctrl_priv *priv = dev_get_priv(dev);
@ -67,6 +100,8 @@ static int stm32_pinctrl_get_pins_count(struct udevice *dev)
if (priv->pinctrl_ngpios)
return priv->pinctrl_ngpios;
if (list_empty(&priv->gpio_dev))
stm32_populate_gpio_dev_list(dev);
/*
* walk through all banks to retrieve the pin-controller
* pins number
@ -88,6 +123,9 @@ static struct udevice *stm32_pinctrl_get_gpio_dev(struct udevice *dev,
struct gpio_dev_priv *uc_priv;
int first_pin = 0;
if (list_empty(&priv->gpio_dev))
stm32_populate_gpio_dev_list(dev);
/* look up for the bank which owns the requested pin */
list_for_each_entry(gpio_bank, &priv->gpio_dev, list) {
uc_priv = dev_get_uclass_priv(gpio_bank->gpio_dev);
@ -174,35 +212,10 @@ static int stm32_pinctrl_get_pin_muxing(struct udevice *dev,
int stm32_pinctrl_probe(struct udevice *dev)
{
struct stm32_pinctrl_priv *priv = dev_get_priv(dev);
struct udevice *gpio_dev;
struct udevice *child;
struct stm32_gpio_bank *gpio_bank;
int ret;
INIT_LIST_HEAD(&priv->gpio_dev);
/*
* parse pin-controller sub-nodes (ie gpio bank nodes) and fill
* a list with all gpio device reference which belongs to the
* current pin-controller. This list is used to find pin_name and
* pin muxing
*/
list_for_each_entry(child, &dev->child_head, sibling_node) {
ret = uclass_get_device_by_name(UCLASS_GPIO, child->name,
&gpio_dev);
if (ret < 0)
continue;
gpio_bank = malloc(sizeof(*gpio_bank));
if (!gpio_bank) {
dev_err(dev, "Not enough memory\n");
return -ENOMEM;
}
gpio_bank->gpio_dev = gpio_dev;
list_add_tail(&gpio_bank->list, &priv->gpio_dev);
}
/* hwspinlock property is optional, just log the error */
ret = hwspinlock_get_by_index(dev, 0, &priv->hws);
if (ret)