clk: qcom: Add KPSS ACC/GCC driver (3ddc3564) · Commits · 戴 / test

drivers/clk/qcom/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -284,3 +284,11 @@ config QCOM_HFPLL
		Support for the high-frequency PLLs present on Qualcomm devices.
		Say Y if you want to support CPU frequency scaling on devices
		such as MSM8974, APQ8084, etc.

		config KPSS_XCC
		tristate "KPSS Clock Controller"
		depends on COMMON_CLK_QCOM
		help
		Support for the Krait ACC and GCC clock controllers. Say Y
		if you want to support CPU frequency scaling on devices such
		as MSM8960, APQ8064, etc.

drivers/clk/qcom/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -45,4 +45,5 @@ obj-$(CONFIG_SDM_DISPCC_845) += dispcc-sdm845.o
		obj-$(CONFIG_SDM_GCC_845) += gcc-sdm845.o
		obj-$(CONFIG_SDM_VIDEOCC_845) += videocc-sdm845.o
		obj-$(CONFIG_SPMI_PMIC_CLKDIV) += clk-spmi-pmic-div.o
		obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
		obj-$(CONFIG_QCOM_HFPLL) += hfpll.o

drivers/clk/qcom/kpss-xcc.c

0 → 100644

+87 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		// Copyright (c) 2018, The Linux Foundation. All rights reserved.

		#include <linux/kernel.h>
		#include <linux/init.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/err.h>
		#include <linux/io.h>
		#include <linux/of.h>
		#include <linux/of_device.h>
		#include <linux/clk.h>
		#include <linux/clk-provider.h>

		static const char *aux_parents[] = {
		"pll8_vote",
		"pxo",
		};

		static unsigned int aux_parent_map[] = {
		3,
		0,
		};

		static const struct of_device_id kpss_xcc_match_table[] = {
		{ .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL },
		{ .compatible = "qcom,kpss-gcc" },
		{}
		};
		MODULE_DEVICE_TABLE(of, kpss_xcc_match_table);

		static int kpss_xcc_driver_probe(struct platform_device *pdev)
		{
		const struct of_device_id *id;
		struct clk *clk;
		struct resource *res;
		void __iomem *base;
		const char *name;

		id = of_match_device(kpss_xcc_match_table, &pdev->dev);
		if (!id)
		return -ENODEV;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		base = devm_ioremap_resource(&pdev->dev, res);
		if (IS_ERR(base))
		return PTR_ERR(base);

		if (id->data) {
		if (of_property_read_string_index(pdev->dev.of_node,
		"clock-output-names",
		0, &name))
		return -ENODEV;
		base += 0x14;
		} else {
		name = "acpu_l2_aux";
		base += 0x28;
		}

		clk = clk_register_mux_table(&pdev->dev, name, aux_parents,
		ARRAY_SIZE(aux_parents), 0, base, 0, 0x3,
		0, aux_parent_map, NULL);

		platform_set_drvdata(pdev, clk);

		return PTR_ERR_OR_ZERO(clk);
		}

		static int kpss_xcc_driver_remove(struct platform_device *pdev)
		{
		clk_unregister_mux(platform_get_drvdata(pdev));
		return 0;
		}

		static struct platform_driver kpss_xcc_driver = {
		.probe = kpss_xcc_driver_probe,
		.remove = kpss_xcc_driver_remove,
		.driver = {
		.name = "kpss-xcc",
		.of_match_table = kpss_xcc_match_table,
		},
		};
		module_platform_driver(kpss_xcc_driver);

		MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver");
		MODULE_LICENSE("GPL v2");
		MODULE_ALIAS("platform:kpss-xcc");

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