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clk: clk-gpio: add actual gated clock

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Existing gpio-gate-clock driver acts like a simple GPIO switch without any
effect on gated clock. Add actual clock actions into enable/disable ops and
implement get_rate op by passing gated clock if it is enabled.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Link: https://lore.kernel.org/r/20240110160956.4476-2-clamor95@gmail.com
[ sorted includes ]
Signed-off-by: Sean Anderson <seanga2@gmail.com>
This commit is contained in:
Svyatoslav Ryhel 2024-01-10 18:09:56 +02:00 • committed by Sean Anderson
parent 0bfbb83055
commit a8dc4965f0
1 changed files with 33 additions and 5 deletions
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36
drivers/clk/clk-gpio.c
View file

@ -3,19 +3,23 @@
* Copyright (C) 2023 Marek Vasut <marek.vasut+renesas@mailbox.org> * Copyright (C) 2023 Marek Vasut <marek.vasut+renesas@mailbox.org>
*/ */
#include <asm/gpio.h> #include <clk.h>
#include <common.h>
#include <clk-uclass.h> #include <clk-uclass.h>
#include <dm.h> #include <dm.h>
#include <linux/clk-provider.h>
#include <asm/gpio.h>
struct clk_gpio_priv { struct clk_gpio_priv {
struct gpio_desc enable; struct gpio_desc enable; /* GPIO, controlling the gate */
struct clk *clk; /* Gated clock */
}; };
static int clk_gpio_enable(struct clk *clk) static int clk_gpio_enable(struct clk *clk)
{ {
struct clk_gpio_priv *priv = dev_get_priv(clk->dev); struct clk_gpio_priv *priv = dev_get_priv(clk->dev);
clk_enable(priv->clk);
dm_gpio_set_value(&priv->enable, 1); dm_gpio_set_value(&priv->enable, 1);
return 0; return 0;
@ -26,21 +30,45 @@ static int clk_gpio_disable(struct clk *clk)
struct clk_gpio_priv *priv = dev_get_priv(clk->dev); struct clk_gpio_priv *priv = dev_get_priv(clk->dev);
dm_gpio_set_value(&priv->enable, 0); dm_gpio_set_value(&priv->enable, 0);
clk_disable(priv->clk);
return 0; return 0;
} }
static ulong clk_gpio_get_rate(struct clk *clk)
{
struct clk_gpio_priv *priv = dev_get_priv(clk->dev);
return clk_get_rate(priv->clk);
}
const struct clk_ops clk_gpio_ops = { const struct clk_ops clk_gpio_ops = {
.enable = clk_gpio_enable, .enable = clk_gpio_enable,
.disable = clk_gpio_disable, .disable = clk_gpio_disable,
.get_rate = clk_gpio_get_rate,
}; };
static int clk_gpio_probe(struct udevice *dev) static int clk_gpio_probe(struct udevice *dev)
{ {
struct clk_gpio_priv *priv = dev_get_priv(dev); struct clk_gpio_priv *priv = dev_get_priv(dev);
int ret;
return gpio_request_by_name(dev, "enable-gpios", 0, priv->clk = devm_clk_get(dev, NULL);
if (IS_ERR(priv->clk)) {
log_debug("%s: Could not get gated clock: %ld\n",
__func__, PTR_ERR(priv->clk));
return PTR_ERR(priv->clk);
}
ret = gpio_request_by_name(dev, "enable-gpios", 0,
&priv->enable, GPIOD_IS_OUT); &priv->enable, GPIOD_IS_OUT);
if (ret) {
log_debug("%s: Could not decode enable-gpios (%d)\n",
__func__, ret);
return ret;
}
return 0;
} }
/* /*