From 297b60346df8beafee954a0fd7c2d64f33f3b9bc Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 01:44:05 +0000
Subject: [PATCH] rtl8211F_led_control
---
kernel/drivers/clk/clk-gpio.c | 230 ++++++++++++++++++++++++++-------------------------------
1 files changed, 104 insertions(+), 126 deletions(-)
diff --git a/kernel/drivers/clk/clk-gpio.c b/kernel/drivers/clk/clk-gpio.c
index af9cc00..38755a2 100644
--- a/kernel/drivers/clk/clk-gpio.c
+++ b/kernel/drivers/clk/clk-gpio.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (C) 2013 - 2014 Texas Instruments Incorporated - http://www.ti.com
+ * Copyright (C) 2013 - 2014 Texas Instruments Incorporated - https://www.ti.com
*
* Authors:
* Jyri Sarha <jsarha@ti.com>
* Sergej Sawazki <ce3a@gmx.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*
* Gpio controlled clock implementation
*/
@@ -30,6 +27,26 @@
* rate - inherits rate from parent. No clk_set_rate support
* parent - fixed parent. No clk_set_parent support
*/
+
+/**
+ * struct clk_gpio - gpio gated clock
+ *
+ * @hw: handle between common and hardware-specific interfaces
+ * @gpiod: gpio descriptor
+ *
+ * Clock with a gpio control for enabling and disabling the parent clock
+ * or switching between two parents by asserting or deasserting the gpio.
+ *
+ * Implements .enable, .disable and .is_enabled or
+ * .get_parent, .set_parent and .determine_rate depending on which clk_ops
+ * is used.
+ */
+struct clk_gpio {
+ struct clk_hw hw;
+ struct gpio_desc *gpiod;
+};
+
+#define to_clk_gpio(_hw) container_of(_hw, struct clk_gpio, hw)
static int clk_gpio_gate_enable(struct clk_hw *hw)
{
@@ -54,12 +71,40 @@
return gpiod_get_value(clk->gpiod);
}
-const struct clk_ops clk_gpio_gate_ops = {
+static const struct clk_ops clk_gpio_gate_ops = {
.enable = clk_gpio_gate_enable,
.disable = clk_gpio_gate_disable,
.is_enabled = clk_gpio_gate_is_enabled,
};
-EXPORT_SYMBOL_GPL(clk_gpio_gate_ops);
+
+static int clk_sleeping_gpio_gate_prepare(struct clk_hw *hw)
+{
+ struct clk_gpio *clk = to_clk_gpio(hw);
+
+ gpiod_set_value_cansleep(clk->gpiod, 1);
+
+ return 0;
+}
+
+static void clk_sleeping_gpio_gate_unprepare(struct clk_hw *hw)
+{
+ struct clk_gpio *clk = to_clk_gpio(hw);
+
+ gpiod_set_value_cansleep(clk->gpiod, 0);
+}
+
+static int clk_sleeping_gpio_gate_is_prepared(struct clk_hw *hw)
+{
+ struct clk_gpio *clk = to_clk_gpio(hw);
+
+ return gpiod_get_value_cansleep(clk->gpiod);
+}
+
+static const struct clk_ops clk_sleeping_gpio_gate_ops = {
+ .prepare = clk_sleeping_gpio_gate_prepare,
+ .unprepare = clk_sleeping_gpio_gate_unprepare,
+ .is_prepared = clk_sleeping_gpio_gate_is_prepared,
+};
/**
* DOC: basic clock multiplexer which can be controlled with a gpio output
@@ -85,174 +130,107 @@
return 0;
}
-const struct clk_ops clk_gpio_mux_ops = {
+static const struct clk_ops clk_gpio_mux_ops = {
.get_parent = clk_gpio_mux_get_parent,
.set_parent = clk_gpio_mux_set_parent,
.determine_rate = __clk_mux_determine_rate,
};
-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, struct gpio_desc *gpiod,
- unsigned long flags, const struct clk_ops *clk_gpio_ops)
+static struct clk_hw *clk_register_gpio(struct device *dev, u8 num_parents,
+ struct gpio_desc *gpiod,
+ const struct clk_ops *clk_gpio_ops)
{
struct clk_gpio *clk_gpio;
struct clk_hw *hw;
struct clk_init_data init = {};
int err;
+ const struct clk_parent_data gpio_parent_data[] = {
+ { .index = 0 },
+ { .index = 1 },
+ };
- if (dev)
- clk_gpio = devm_kzalloc(dev, sizeof(*clk_gpio), GFP_KERNEL);
- else
- clk_gpio = kzalloc(sizeof(*clk_gpio), GFP_KERNEL);
-
+ clk_gpio = devm_kzalloc(dev, sizeof(*clk_gpio), GFP_KERNEL);
if (!clk_gpio)
return ERR_PTR(-ENOMEM);
- init.name = name;
+ init.name = dev->of_node->name;
init.ops = clk_gpio_ops;
- init.flags = flags | CLK_IS_BASIC;
- init.parent_names = parent_names;
+ init.parent_data = gpio_parent_data;
init.num_parents = num_parents;
+ init.flags = CLK_SET_RATE_PARENT;
clk_gpio->gpiod = gpiod;
clk_gpio->hw.init = &init;
hw = &clk_gpio->hw;
- if (dev)
- err = devm_clk_hw_register(dev, hw);
+ err = devm_clk_hw_register(dev, hw);
+ if (err)
+ return ERR_PTR(err);
+
+ return hw;
+}
+
+static struct clk_hw *clk_hw_register_gpio_gate(struct device *dev,
+ int num_parents,
+ struct gpio_desc *gpiod)
+{
+ const struct clk_ops *ops;
+
+ if (gpiod_cansleep(gpiod))
+ ops = &clk_sleeping_gpio_gate_ops;
else
- err = clk_hw_register(NULL, hw);
+ ops = &clk_gpio_gate_ops;
- if (!err)
- return hw;
-
- if (!dev) {
- kfree(clk_gpio);
- }
-
- return ERR_PTR(err);
+ return clk_register_gpio(dev, num_parents, gpiod, ops);
}
-/**
- * clk_hw_register_gpio_gate - register a gpio clock gate with the clock
- * framework
- * @dev: device that is registering this clock
- * @name: name of this clock
- * @parent_name: name of this clock's parent
- * @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, struct gpio_desc *gpiod,
- unsigned long flags)
+static struct clk_hw *clk_hw_register_gpio_mux(struct device *dev,
+ struct gpio_desc *gpiod)
{
- return clk_register_gpio(dev, name,
- (parent_name ? &parent_name : NULL),
- (parent_name ? 1 : 0), gpiod, flags,
- &clk_gpio_gate_ops);
+ return clk_register_gpio(dev, 2, gpiod, &clk_gpio_mux_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, struct gpio_desc *gpiod,
- unsigned long flags)
-{
- struct clk_hw *hw;
-
- hw = clk_hw_register_gpio_gate(dev, name, parent_name, gpiod, flags);
- if (IS_ERR(hw))
- return ERR_CAST(hw);
- return hw->clk;
-}
-EXPORT_SYMBOL_GPL(clk_register_gpio_gate);
-
-/**
- * clk_hw_register_gpio_mux - register a gpio clock mux with the clock framework
- * @dev: device that is registering this clock
- * @name: name of this clock
- * @parent_names: names of this clock's parents
- * @num_parents: number of parents listed in @parent_names
- * @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, struct gpio_desc *gpiod,
- unsigned long flags)
-{
- if (num_parents != 2) {
- pr_err("mux-clock %s must have 2 parents\n", name);
- return ERR_PTR(-EINVAL);
- }
-
- return clk_register_gpio(dev, name, parent_names, num_parents,
- 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, struct gpio_desc *gpiod,
- unsigned long flags)
-{
- struct clk_hw *hw;
-
- hw = clk_hw_register_gpio_mux(dev, name, parent_names, num_parents,
- gpiod, flags);
- if (IS_ERR(hw))
- return ERR_CAST(hw);
- return hw->clk;
-}
-EXPORT_SYMBOL_GPL(clk_register_gpio_mux);
static int gpio_clk_driver_probe(struct platform_device *pdev)
{
- struct device_node *node = pdev->dev.of_node;
- const char **parent_names, *gpio_name;
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ const char *gpio_name;
unsigned int num_parents;
struct gpio_desc *gpiod;
- struct clk *clk;
+ struct clk_hw *hw;
bool is_mux;
int ret;
- num_parents = of_clk_get_parent_count(node);
- if (num_parents) {
- parent_names = devm_kcalloc(&pdev->dev, num_parents,
- sizeof(char *), GFP_KERNEL);
- if (!parent_names)
- return -ENOMEM;
-
- of_clk_parent_fill(node, parent_names, num_parents);
- } else {
- parent_names = NULL;
- }
-
is_mux = of_device_is_compatible(node, "gpio-mux-clock");
+ num_parents = of_clk_get_parent_count(node);
+ if (is_mux && num_parents != 2) {
+ dev_err(dev, "mux-clock must have 2 parents\n");
+ return -EINVAL;
+ }
+
gpio_name = is_mux ? "select" : "enable";
- gpiod = devm_gpiod_get(&pdev->dev, gpio_name, GPIOD_OUT_LOW);
+ gpiod = devm_gpiod_get(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__);
+ pr_debug("%pOFn: %s: GPIOs not yet available, retry later\n",
+ node, __func__);
else
- pr_err("%s: %s: Can't get '%s' named GPIO property\n",
- node->name, __func__,
+ pr_err("%pOFn: %s: Can't get '%s' named GPIO property\n",
+ node, __func__,
gpio_name);
return ret;
}
if (is_mux)
- clk = clk_register_gpio_mux(&pdev->dev, node->name,
- parent_names, num_parents, gpiod, 0);
+ hw = clk_hw_register_gpio_mux(dev, gpiod);
else
- clk = clk_register_gpio_gate(&pdev->dev, node->name,
- parent_names ? parent_names[0] : NULL, gpiod,
- CLK_SET_RATE_PARENT);
- if (IS_ERR(clk))
- return PTR_ERR(clk);
+ hw = clk_hw_register_gpio_gate(dev, num_parents, gpiod);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
- return of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, hw);
}
static const struct of_device_id gpio_clk_match_table[] = {
--
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