src/kernel/linux/v4.19/drivers/clk/meson/gxbb-aoclk.c

// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
/*
 * Copyright (c) 2016 BayLibre, SAS.
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 */
#include <linux/platform_device.h>
#include <linux/mfd/syscon.h>
#include "clk-regmap.h"
#include "meson-aoclk.h"
#include "gxbb-aoclk.h"

#define GXBB_AO_GATE(_name, _bit)					\
static struct clk_regmap _name##_ao = {					\
	.data = &(struct clk_regmap_gate_data) {			\
		.offset = AO_RTI_GEN_CNTL_REG0,				\
		.bit_idx = (_bit),					\
	},								\
	.hw.init = &(struct clk_init_data) {				\
		.name = #_name "_ao",					\
		.ops = &clk_regmap_gate_ops,				\
		.parent_names = (const char *[]){ "clk81" },		\
		.num_parents = 1,					\
		.flags = CLK_IGNORE_UNUSED,				\
	},								\
}

GXBB_AO_GATE(remote, 0);
GXBB_AO_GATE(i2c_master, 1);
GXBB_AO_GATE(i2c_slave, 2);
GXBB_AO_GATE(uart1, 3);
GXBB_AO_GATE(uart2, 5);
GXBB_AO_GATE(ir_blaster, 6);

static struct aoclk_cec_32k cec_32k_ao = {
	.hw.init = &(struct clk_init_data) {
		.name = "cec_32k_ao",
		.ops = &meson_aoclk_cec_32k_ops,
		.parent_names = (const char *[]){ "xtal" },
		.num_parents = 1,
		.flags = CLK_IGNORE_UNUSED,
	},
};

static const unsigned int gxbb_aoclk_reset[] = {
	[RESET_AO_REMOTE] = 16,
	[RESET_AO_I2C_MASTER] = 18,
	[RESET_AO_I2C_SLAVE] = 19,
	[RESET_AO_UART1] = 17,
	[RESET_AO_UART2] = 22,
	[RESET_AO_IR_BLASTER] = 23,
};

static struct clk_regmap *gxbb_aoclk_gate[] = {
	[CLKID_AO_REMOTE] = &remote_ao,
	[CLKID_AO_I2C_MASTER] = &i2c_master_ao,
	[CLKID_AO_I2C_SLAVE] = &i2c_slave_ao,
	[CLKID_AO_UART1] = &uart1_ao,
	[CLKID_AO_UART2] = &uart2_ao,
	[CLKID_AO_IR_BLASTER] = &ir_blaster_ao,
};

static const struct clk_hw_onecell_data gxbb_aoclk_onecell_data = {
	.hws = {
		[CLKID_AO_REMOTE] = &remote_ao.hw,
		[CLKID_AO_I2C_MASTER] = &i2c_master_ao.hw,
		[CLKID_AO_I2C_SLAVE] = &i2c_slave_ao.hw,
		[CLKID_AO_UART1] = &uart1_ao.hw,
		[CLKID_AO_UART2] = &uart2_ao.hw,
		[CLKID_AO_IR_BLASTER] = &ir_blaster_ao.hw,
		[CLKID_AO_CEC_32K] = &cec_32k_ao.hw,
	},
	.num = NR_CLKS,
};

static int gxbb_register_cec_ao_32k(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct regmap *regmap;
	int ret;

	regmap = syscon_node_to_regmap(of_get_parent(dev->of_node));
	if (IS_ERR(regmap)) {
		dev_err(dev, "failed to get regmap\n");
		return PTR_ERR(regmap);
	}

	/* Specific clocks */
	cec_32k_ao.regmap = regmap;
	ret = devm_clk_hw_register(dev, &cec_32k_ao.hw);
	if (ret) {
		dev_err(&pdev->dev, "clk cec_32k_ao register failed.\n");
		return ret;
	}

	return 0;
}

static const struct meson_aoclk_data gxbb_aoclkc_data = {
	.reset_reg	= AO_RTI_GEN_CNTL_REG0,
	.num_reset	= ARRAY_SIZE(gxbb_aoclk_reset),
	.reset		= gxbb_aoclk_reset,
	.num_clks	= ARRAY_SIZE(gxbb_aoclk_gate),
	.clks		= gxbb_aoclk_gate,
	.hw_data	= &gxbb_aoclk_onecell_data,
};

static int gxbb_aoclkc_probe(struct platform_device *pdev)
{
	int ret = gxbb_register_cec_ao_32k(pdev);
	if (ret)
		return ret;

	return meson_aoclkc_probe(pdev);
}

static const struct of_device_id gxbb_aoclkc_match_table[] = {
	{
		.compatible	= "amlogic,meson-gx-aoclkc",
		.data		= &gxbb_aoclkc_data,
	},
	{ }
};

static struct platform_driver gxbb_aoclkc_driver = {
	.probe		= gxbb_aoclkc_probe,
	.driver		= {
		.name	= "gxbb-aoclkc",
		.of_match_table = gxbb_aoclkc_match_table,
	},
};
builtin_platform_driver(gxbb_aoclkc_driver);