linux/drivers/clk/meson/gxbb-aoclk.c

/*
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright (c) 2016 BayLibre, SAS.
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * BSD LICENSE
 *
 * Copyright (c) 2016 BayLibre, SAS.
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#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_SET_RATE_PARENT | 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);