[PATCH v3 3/9] clk: realtek: Introduce a common probe()
From: Yu-Chun Lin <eleanor.lin@realtek.com>
Date: 2026-01-22 11:09:15
Also in:
linux-clk, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
From: Cheng-Yu Lee <redacted> Add rtk_clk_probe() to set up the shared regmap, register clock hardware, add the clock provider, and optionally register a reset controller when reset bank data is provided. Signed-off-by: Cheng-Yu Lee <redacted> Co-developed-by: Yu-Chun Lin <eleanor.lin@realtek.com> Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com> --- Changes in v3: - Converted macro to static inline function. - Removed the redundant header. --- drivers/clk/realtek/Makefile | 1 + drivers/clk/realtek/common.c | 64 ++++++++++++++++++++++++++++++++++++ drivers/clk/realtek/common.h | 43 ++++++++++++++++++++++++ 3 files changed, 108 insertions(+) create mode 100644 drivers/clk/realtek/common.c create mode 100644 drivers/clk/realtek/common.h
diff --git a/drivers/clk/realtek/Makefile b/drivers/clk/realtek/Makefile
index 52267de2eef4..4041951b7c62 100644
--- a/drivers/clk/realtek/Makefile
+++ b/drivers/clk/realtek/Makefile@@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_RTK_CLK_COMMON) += clk-rtk.o +clk-rtk-y += common.o clk-rtk-y += reset.o
diff --git a/drivers/clk/realtek/common.c b/drivers/clk/realtek/common.c
new file mode 100644
index 000000000000..c6540d36560c
--- /dev/null
+++ b/drivers/clk/realtek/common.c@@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2019 Realtek Semiconductor Corporation + * Author: Cheng-Yu Lee <cylee12@realtek.com> + */ + +#include <linux/device.h> +#include <linux/module.h> +#include <linux/mfd/syscon.h> +#include <linux/platform_device.h> +#include "common.h" + +int rtk_clk_probe(struct platform_device *pdev, const struct rtk_clk_desc *desc) +{ + int i, ret; + struct regmap *regmap; + struct device *dev = &pdev->dev; + struct rtk_reset_initdata reset_initdata = {0}; + + regmap = device_node_to_regmap(pdev->dev.of_node); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), "failed to get regmap\n"); + + for (i = 0; i < desc->num_clks; i++) + desc->clks[i]->regmap = regmap; + + for (i = 0; i < desc->clk_data->num; i++) { + struct clk_hw *hw = desc->clk_data->hws[i]; + + if (!hw) + continue; + + ret = devm_clk_hw_register(dev, hw); + + if (ret) { + dev_warn(dev, "failed to register hw of clk%d: %d\n", i, + ret); + desc->clk_data->hws[i] = NULL; + } + } + + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, + desc->clk_data); + if (ret) + return dev_err_probe(dev, ret, "failed to add clock provider\n"); + + if (!desc->num_reset_banks) + return 0; + + if (!desc->reset_banks) + return dev_err_probe(dev, -EINVAL, + "Missing reset banks data though num_reset_banks is %zu\n", + desc->num_reset_banks); + + reset_initdata.regmap = regmap; + reset_initdata.num_banks = desc->num_reset_banks; + reset_initdata.banks = desc->reset_banks; + + return rtk_reset_controller_add(dev, &reset_initdata); +} +EXPORT_SYMBOL_GPL(rtk_clk_probe); + +MODULE_DESCRIPTION("Realtek clock infrastructure"); +MODULE_LICENSE("GPL");
diff --git a/drivers/clk/realtek/common.h b/drivers/clk/realtek/common.h
new file mode 100644
index 000000000000..4e2cc9650a23
--- /dev/null
+++ b/drivers/clk/realtek/common.h@@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2016-2019 Realtek Semiconductor Corporation + * Author: Cheng-Yu Lee <cylee12@realtek.com> + */ + +#ifndef __CLK_REALTEK_COMMON_H +#define __CLK_REALTEK_COMMON_H + +#include <linux/clk-provider.h> +#include <linux/device.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/regmap.h> +#include "reset.h" + +#define __clk_regmap_hw(_p) ((_p)->hw) + +struct device; +struct platform_device; + +struct clk_regmap { + struct clk_hw hw; + struct regmap *regmap; +}; + +struct rtk_clk_desc { + struct clk_hw_onecell_data *clk_data; + struct clk_regmap **clks; + size_t num_clks; + struct rtk_reset_bank *reset_banks; + size_t num_reset_banks; +}; + +static inline struct clk_regmap *to_clk_regmap(struct clk_hw *hw) +{ + return container_of(hw, struct clk_regmap, hw); +} + +int rtk_clk_probe(struct platform_device *pdev, + const struct rtk_clk_desc *desc); + +#endif /* __CLK_REALTEK_COMMON_H */
--
2.34.1