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path: root/drivers/clk/clk-gpio.c
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Diffstat (limited to 'drivers/clk/clk-gpio.c')
-rw-r--r--drivers/clk/clk-gpio.c84
1 files changed, 28 insertions, 56 deletions
diff --git a/drivers/clk/clk-gpio.c b/drivers/clk/clk-gpio.c
index 86b245746a6b..151513c655c3 100644
--- a/drivers/clk/clk-gpio.c
+++ b/drivers/clk/clk-gpio.c
@@ -15,9 +15,7 @@
#include <linux/clk-provider.h>
#include <linux/export.h>
#include <linux/slab.h>
-#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
-#include <linux/of_gpio.h>
#include <linux/err.h>
#include <linux/device.h>
#include <linux/platform_device.h>
@@ -95,14 +93,12 @@ const struct clk_ops clk_gpio_mux_ops = {
EXPORT_SYMBOL_GPL(clk_gpio_mux_ops);
static struct clk_hw *clk_register_gpio(struct device *dev, const char *name,
- const char * const *parent_names, u8 num_parents, unsigned gpio,
- bool active_low, unsigned long flags,
- const struct clk_ops *clk_gpio_ops)
+ const char * const *parent_names, u8 num_parents, struct gpio_desc *gpiod,
+ unsigned long flags, const struct clk_ops *clk_gpio_ops)
{
struct clk_gpio *clk_gpio;
struct clk_hw *hw;
struct clk_init_data init = {};
- unsigned long gpio_flags;
int err;
if (dev)
@@ -113,32 +109,13 @@ static struct clk_hw *clk_register_gpio(struct device *dev, const char *name,
if (!clk_gpio)
return ERR_PTR(-ENOMEM);
- if (active_low)
- gpio_flags = GPIOF_ACTIVE_LOW | GPIOF_OUT_INIT_HIGH;
- else
- gpio_flags = GPIOF_OUT_INIT_LOW;
-
- if (dev)
- err = devm_gpio_request_one(dev, gpio, gpio_flags, name);
- else
- err = gpio_request_one(gpio, gpio_flags, name);
- if (err) {
- if (err != -EPROBE_DEFER)
- pr_err("%s: %s: Error requesting clock control gpio %u\n",
- __func__, name, gpio);
- if (!dev)
- kfree(clk_gpio);
-
- return ERR_PTR(err);
- }
-
init.name = name;
init.ops = clk_gpio_ops;
init.flags = flags | CLK_IS_BASIC;
init.parent_names = parent_names;
init.num_parents = num_parents;
- clk_gpio->gpiod = gpio_to_desc(gpio);
+ clk_gpio->gpiod = gpiod;
clk_gpio->hw.init = &init;
hw = &clk_gpio->hw;
@@ -151,7 +128,6 @@ static struct clk_hw *clk_register_gpio(struct device *dev, const char *name,
return hw;
if (!dev) {
- gpiod_put(clk_gpio->gpiod);
kfree(clk_gpio);
}
@@ -164,29 +140,27 @@ static struct clk_hw *clk_register_gpio(struct device *dev, const char *name,
* @dev: device that is registering this clock
* @name: name of this clock
* @parent_name: name of this clock's parent
- * @gpio: gpio number to gate this clock
- * @active_low: true if gpio should be set to 0 to enable clock
+ * @gpiod: gpio descriptor to gate this clock
* @flags: clock flags
*/
struct clk_hw *clk_hw_register_gpio_gate(struct device *dev, const char *name,
- const char *parent_name, unsigned gpio, bool active_low,
+ const char *parent_name, struct gpio_desc *gpiod,
unsigned long flags)
{
return clk_register_gpio(dev, name,
(parent_name ? &parent_name : NULL),
- (parent_name ? 1 : 0), gpio, active_low, flags,
+ (parent_name ? 1 : 0), gpiod, flags,
&clk_gpio_gate_ops);
}
EXPORT_SYMBOL_GPL(clk_hw_register_gpio_gate);
struct clk *clk_register_gpio_gate(struct device *dev, const char *name,
- const char *parent_name, unsigned gpio, bool active_low,
+ const char *parent_name, struct gpio_desc *gpiod,
unsigned long flags)
{
struct clk_hw *hw;
- hw = clk_hw_register_gpio_gate(dev, name, parent_name, gpio, active_low,
- flags);
+ hw = clk_hw_register_gpio_gate(dev, name, parent_name, gpiod, flags);
if (IS_ERR(hw))
return ERR_CAST(hw);
return hw->clk;
@@ -199,13 +173,12 @@ EXPORT_SYMBOL_GPL(clk_register_gpio_gate);
* @name: name of this clock
* @parent_names: names of this clock's parents
* @num_parents: number of parents listed in @parent_names
- * @gpio: gpio number to gate this clock
- * @active_low: true if gpio should be set to 0 to enable clock
+ * @gpiod: gpio descriptor to gate this clock
* @flags: clock flags
*/
struct clk_hw *clk_hw_register_gpio_mux(struct device *dev, const char *name,
- const char * const *parent_names, u8 num_parents, unsigned gpio,
- bool active_low, unsigned long flags)
+ const char * const *parent_names, u8 num_parents, struct gpio_desc *gpiod,
+ unsigned long flags)
{
if (num_parents != 2) {
pr_err("mux-clock %s must have 2 parents\n", name);
@@ -213,18 +186,18 @@ struct clk_hw *clk_hw_register_gpio_mux(struct device *dev, const char *name,
}
return clk_register_gpio(dev, name, parent_names, num_parents,
- gpio, active_low, flags, &clk_gpio_mux_ops);
+ gpiod, flags, &clk_gpio_mux_ops);
}
EXPORT_SYMBOL_GPL(clk_hw_register_gpio_mux);
struct clk *clk_register_gpio_mux(struct device *dev, const char *name,
- const char * const *parent_names, u8 num_parents, unsigned gpio,
- bool active_low, unsigned long flags)
+ const char * const *parent_names, u8 num_parents, struct gpio_desc *gpiod,
+ unsigned long flags)
{
struct clk_hw *hw;
hw = clk_hw_register_gpio_mux(dev, name, parent_names, num_parents,
- gpio, active_low, flags);
+ gpiod, flags);
if (IS_ERR(hw))
return ERR_CAST(hw);
return hw->clk;
@@ -236,10 +209,10 @@ static int gpio_clk_driver_probe(struct platform_device *pdev)
struct device_node *node = pdev->dev.of_node;
const char **parent_names, *gpio_name;
unsigned int num_parents;
- int gpio;
- enum of_gpio_flags of_flags;
+ struct gpio_desc *gpiod;
struct clk *clk;
- bool active_low, is_mux;
+ bool is_mux;
+ int ret;
num_parents = of_clk_get_parent_count(node);
if (num_parents) {
@@ -255,28 +228,27 @@ static int gpio_clk_driver_probe(struct platform_device *pdev)
is_mux = of_device_is_compatible(node, "gpio-mux-clock");
- gpio_name = is_mux ? "select-gpios" : "enable-gpios";
- gpio = of_get_named_gpio_flags(node, gpio_name, 0, &of_flags);
- if (gpio < 0) {
- if (gpio == -EPROBE_DEFER)
+ gpio_name = is_mux ? "select" : "enable";
+ gpiod = devm_gpiod_get(&pdev->dev, gpio_name, GPIOD_OUT_LOW);
+ if (IS_ERR(gpiod)) {
+ ret = PTR_ERR(gpiod);
+ if (ret == -EPROBE_DEFER)
pr_debug("%s: %s: GPIOs not yet available, retry later\n",
node->name, __func__);
else
- pr_err("%s: %s: Can't get '%s' DT property\n",
+ pr_err("%s: %s: Can't get '%s' named GPIO property\n",
node->name, __func__,
gpio_name);
- return gpio;
+ return ret;
}
- active_low = of_flags & OF_GPIO_ACTIVE_LOW;
-
if (is_mux)
clk = clk_register_gpio_mux(&pdev->dev, node->name,
- parent_names, num_parents, gpio, active_low, 0);
+ parent_names, num_parents, gpiod, 0);
else
clk = clk_register_gpio_gate(&pdev->dev, node->name,
- parent_names ? parent_names[0] : NULL, gpio,
- active_low, 0);
+ parent_names ? parent_names[0] : NULL, gpiod,
+ 0);
if (IS_ERR(clk))
return PTR_ERR(clk);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-29 03:24:26 +0300