xref: /linux/drivers/clk/imx/clk-imx8-acm.c (revision e9a164e367f039629fd5466a79b9f495646e1261)

// SPDX-License-Identifier: GPL-2.0+
//
// Copyright 2023 NXP
//

#include <dt-bindings/clock/imx8-clock.h>
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>

#include "clk.h"

/**
 * struct clk_imx_acm_pm_domains - structure for multi power domain
 * @pd_dev: power domain device
 * @pd_dev_link: power domain device link
 * @num_domains: power domain nummber
 */
struct clk_imx_acm_pm_domains {
	struct device **pd_dev;
	struct device_link **pd_dev_link;
	int    num_domains;
};

/**
 * struct clk_imx8_acm_sel - for clock mux
 * @name: clock name
 * @clkid: clock id
 * @parents: clock parents
 * @num_parents: clock parents number
 * @reg: register offset
 * @shift: bit shift in register
 * @width: bits width
 */
struct clk_imx8_acm_sel {
	const char			*name;
	int				clkid;
	const struct clk_parent_data	*parents;	/* For mux */
	int				num_parents;
	u32				reg;
	u8				shift;
	u8				width;
};

/**
 * struct imx8_acm_soc_data - soc specific data
 * @sels: pointer to struct clk_imx8_acm_sel
 * @num_sels: numbers of items
 */
struct imx8_acm_soc_data {
	struct clk_imx8_acm_sel *sels;
	unsigned int num_sels;
};

/**
 * struct imx8_acm_priv - private structure
 * @dev_pm: multi power domain
 * @soc_data: pointer to soc data
 * @reg: base address of registers
 * @regs: save registers for suspend
 */
struct imx8_acm_priv {
	struct clk_imx_acm_pm_domains dev_pm;
	const struct imx8_acm_soc_data *soc_data;
	void __iomem *reg;
	u32 regs[IMX_ADMA_ACM_CLK_END];
};

static const struct clk_parent_data imx8qm_aud_clk_sels[] = {
	{ .fw_name = "aud_rec_clk0_lpcg_clk" },
	{ .fw_name = "aud_rec_clk1_lpcg_clk" },
	{ .fw_name = "mlb_clk" },
	{ .fw_name = "hdmi_rx_mclk" },
	{ .fw_name = "ext_aud_mclk0" },
	{ .fw_name = "ext_aud_mclk1" },
	{ .fw_name = "esai0_rx_clk" },
	{ .fw_name = "esai0_rx_hf_clk" },
	{ .fw_name = "esai0_tx_clk" },
	{ .fw_name = "esai0_tx_hf_clk" },
	{ .fw_name = "esai1_rx_clk" },
	{ .fw_name = "esai1_rx_hf_clk" },
	{ .fw_name = "esai1_tx_clk" },
	{ .fw_name = "esai1_tx_hf_clk" },
	{ .fw_name = "spdif0_rx" },
	{ .fw_name = "spdif1_rx" },
	{ .fw_name = "sai0_rx_bclk" },
	{ .fw_name = "sai0_tx_bclk" },
	{ .fw_name = "sai1_rx_bclk" },
	{ .fw_name = "sai1_tx_bclk" },
	{ .fw_name = "sai2_rx_bclk" },
	{ .fw_name = "sai3_rx_bclk" },
	{ .fw_name = "sai4_rx_bclk" },
};

static const struct clk_parent_data imx8qm_mclk_out_sels[] = {
	{ .fw_name = "aud_rec_clk0_lpcg_clk" },
	{ .fw_name = "aud_rec_clk1_lpcg_clk" },
	{ .fw_name = "mlb_clk" },
	{ .fw_name = "hdmi_rx_mclk" },
	{ .fw_name = "spdif0_rx" },
	{ .fw_name = "spdif1_rx" },
	{ .fw_name = "sai4_rx_bclk" },
	{ .fw_name = "sai6_rx_bclk" },
};

static const struct clk_parent_data imx8qm_mclk_sels[] = {
	{ .fw_name = "aud_pll_div_clk0_lpcg_clk" },
	{ .fw_name = "aud_pll_div_clk1_lpcg_clk" },
	{ .fw_name = "acm_aud_clk0_sel" },
	{ .fw_name = "acm_aud_clk1_sel" },
};

static const struct clk_parent_data imx8qm_asrc_mux_clk_sels[] = {
	{ .fw_name = "sai4_rx_bclk" },
	{ .fw_name = "sai5_tx_bclk" },
	{ .index = -1 },
	{ .fw_name = "mlb_clk" },

};

static struct clk_imx8_acm_sel imx8qm_sels[] = {
	{ "acm_aud_clk0_sel", IMX_ADMA_ACM_AUD_CLK0_SEL, imx8qm_aud_clk_sels, ARRAY_SIZE(imx8qm_aud_clk_sels), 0x000000, 0, 5 },
	{ "acm_aud_clk1_sel", IMX_ADMA_ACM_AUD_CLK1_SEL, imx8qm_aud_clk_sels, ARRAY_SIZE(imx8qm_aud_clk_sels), 0x010000, 0, 5 },
	{ "acm_mclkout0_sel", IMX_ADMA_ACM_MCLKOUT0_SEL, imx8qm_mclk_out_sels, ARRAY_SIZE(imx8qm_mclk_out_sels), 0x020000, 0, 3 },
	{ "acm_mclkout1_sel", IMX_ADMA_ACM_MCLKOUT1_SEL, imx8qm_mclk_out_sels, ARRAY_SIZE(imx8qm_mclk_out_sels), 0x030000, 0, 3 },
	{ "acm_asrc0_mclk_sel", IMX_ADMA_ACM_ASRC0_MUX_CLK_SEL, imx8qm_asrc_mux_clk_sels, ARRAY_SIZE(imx8qm_asrc_mux_clk_sels), 0x040000, 0, 2 },
	{ "acm_esai0_mclk_sel", IMX_ADMA_ACM_ESAI0_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x060000, 0, 2 },
	{ "acm_esai1_mclk_sel", IMX_ADMA_ACM_ESAI1_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x070000, 0, 2 },
	{ "acm_sai0_mclk_sel", IMX_ADMA_ACM_SAI0_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x0E0000, 0, 2 },
	{ "acm_sai1_mclk_sel", IMX_ADMA_ACM_SAI1_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x0F0000, 0, 2 },
	{ "acm_sai2_mclk_sel", IMX_ADMA_ACM_SAI2_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x100000, 0, 2 },
	{ "acm_sai3_mclk_sel", IMX_ADMA_ACM_SAI3_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x110000, 0, 2 },
	{ "acm_sai4_mclk_sel", IMX_ADMA_ACM_SAI4_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x120000, 0, 2 },
	{ "acm_sai5_mclk_sel", IMX_ADMA_ACM_SAI5_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x130000, 0, 2 },
	{ "acm_sai6_mclk_sel", IMX_ADMA_ACM_SAI6_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x140000, 0, 2 },
	{ "acm_sai7_mclk_sel", IMX_ADMA_ACM_SAI7_MCLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x150000, 0, 2 },
	{ "acm_spdif0_mclk_sel", IMX_ADMA_ACM_SPDIF0_TX_CLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x1A0000, 0, 2 },
	{ "acm_spdif1_mclk_sel", IMX_ADMA_ACM_SPDIF1_TX_CLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x1B0000, 0, 2 },
	{ "acm_mqs_mclk_sel", IMX_ADMA_ACM_MQS_TX_CLK_SEL, imx8qm_mclk_sels, ARRAY_SIZE(imx8qm_mclk_sels), 0x1C0000, 0, 2 },
};

static const struct clk_parent_data imx8qxp_aud_clk_sels[] = {
	{ .fw_name = "aud_rec_clk0_lpcg_clk" },
	{ .fw_name = "aud_rec_clk1_lpcg_clk" },
	{ .fw_name = "ext_aud_mclk0" },
	{ .fw_name = "ext_aud_mclk1" },
	{ .fw_name = "esai0_rx_clk" },
	{ .fw_name = "esai0_rx_hf_clk" },
	{ .fw_name = "esai0_tx_clk" },
	{ .fw_name = "esai0_tx_hf_clk" },
	{ .fw_name = "spdif0_rx" },
	{ .fw_name = "sai0_rx_bclk" },
	{ .fw_name = "sai0_tx_bclk" },
	{ .fw_name = "sai1_rx_bclk" },
	{ .fw_name = "sai1_tx_bclk" },
	{ .fw_name = "sai2_rx_bclk" },
	{ .fw_name = "sai3_rx_bclk" },
};

static const struct clk_parent_data imx8qxp_mclk_out_sels[] = {
	{ .fw_name = "aud_rec_clk0_lpcg_clk" },
	{ .fw_name = "aud_rec_clk1_lpcg_clk" },
	{ .index = -1 },
	{ .index = -1 },
	{ .fw_name = "spdif0_rx" },
	{ .index = -1 },
	{ .index = -1 },
	{ .fw_name = "sai4_rx_bclk" },
};

static const struct clk_parent_data imx8qxp_mclk_sels[] = {
	{ .fw_name = "aud_pll_div_clk0_lpcg_clk" },
	{ .fw_name = "aud_pll_div_clk1_lpcg_clk" },
	{ .fw_name = "acm_aud_clk0_sel" },
	{ .fw_name = "acm_aud_clk1_sel" },
};

static struct clk_imx8_acm_sel imx8qxp_sels[] = {
	{ "acm_aud_clk0_sel", IMX_ADMA_ACM_AUD_CLK0_SEL, imx8qxp_aud_clk_sels, ARRAY_SIZE(imx8qxp_aud_clk_sels), 0x000000, 0, 5 },
	{ "acm_aud_clk1_sel", IMX_ADMA_ACM_AUD_CLK1_SEL, imx8qxp_aud_clk_sels, ARRAY_SIZE(imx8qxp_aud_clk_sels), 0x010000, 0, 5 },
	{ "acm_mclkout0_sel", IMX_ADMA_ACM_MCLKOUT0_SEL, imx8qxp_mclk_out_sels, ARRAY_SIZE(imx8qxp_mclk_out_sels), 0x020000, 0, 3 },
	{ "acm_mclkout1_sel", IMX_ADMA_ACM_MCLKOUT1_SEL, imx8qxp_mclk_out_sels, ARRAY_SIZE(imx8qxp_mclk_out_sels), 0x030000, 0, 3 },
	{ "acm_esai0_mclk_sel", IMX_ADMA_ACM_ESAI0_MCLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x060000, 0, 2 },
	{ "acm_sai0_mclk_sel", IMX_ADMA_ACM_SAI0_MCLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x0E0000, 0, 2 },
	{ "acm_sai1_mclk_sel", IMX_ADMA_ACM_SAI1_MCLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x0F0000, 0, 2 },
	{ "acm_sai2_mclk_sel", IMX_ADMA_ACM_SAI2_MCLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x100000, 0, 2 },
	{ "acm_sai3_mclk_sel", IMX_ADMA_ACM_SAI3_MCLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x110000, 0, 2 },
	{ "acm_sai4_mclk_sel", IMX_ADMA_ACM_SAI4_MCLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x140000, 0, 2 },
	{ "acm_sai5_mclk_sel", IMX_ADMA_ACM_SAI5_MCLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x150000, 0, 2 },
	{ "acm_spdif0_mclk_sel", IMX_ADMA_ACM_SPDIF0_TX_CLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x1A0000, 0, 2 },
	{ "acm_mqs_mclk_sel", IMX_ADMA_ACM_MQS_TX_CLK_SEL, imx8qxp_mclk_sels, ARRAY_SIZE(imx8qxp_mclk_sels), 0x1C0000, 0, 2 },
};

static const struct clk_parent_data imx8dxl_aud_clk_sels[] = {
	{ .fw_name = "aud_rec_clk0_lpcg_clk" },
	{ .fw_name = "aud_rec_clk1_lpcg_clk" },
	{ .fw_name = "ext_aud_mclk0" },
	{ .fw_name = "ext_aud_mclk1" },
	{ .index = -1 },
	{ .index = -1 },
	{ .index = -1 },
	{ .index = -1 },
	{ .fw_name = "spdif0_rx" },
	{ .fw_name = "sai0_rx_bclk" },
	{ .fw_name = "sai0_tx_bclk" },
	{ .fw_name = "sai1_rx_bclk" },
	{ .fw_name = "sai1_tx_bclk" },
	{ .fw_name = "sai2_rx_bclk" },
	{ .fw_name = "sai3_rx_bclk" },
};

static const struct clk_parent_data imx8dxl_mclk_out_sels[] = {
	{ .fw_name = "aud_rec_clk0_lpcg_clk" },
	{ .fw_name = "aud_rec_clk1_lpcg_clk" },
	{ .index = -1 },
	{ .index = -1 },
	{ .fw_name = "spdif0_rx" },
	{ .index = -1 },
	{ .index = -1 },
	{ .index = -1 },
};

static const struct clk_parent_data imx8dxl_mclk_sels[] = {
	{ .fw_name = "aud_pll_div_clk0_lpcg_clk" },
	{ .fw_name = "aud_pll_div_clk1_lpcg_clk" },
	{ .fw_name = "acm_aud_clk0_sel" },
	{ .fw_name = "acm_aud_clk1_sel" },
};

static struct clk_imx8_acm_sel imx8dxl_sels[] = {
	{ "acm_aud_clk0_sel", IMX_ADMA_ACM_AUD_CLK0_SEL, imx8dxl_aud_clk_sels, ARRAY_SIZE(imx8dxl_aud_clk_sels), 0x000000, 0, 5 },
	{ "acm_aud_clk1_sel", IMX_ADMA_ACM_AUD_CLK1_SEL, imx8dxl_aud_clk_sels, ARRAY_SIZE(imx8dxl_aud_clk_sels), 0x010000, 0, 5 },
	{ "acm_mclkout0_sel", IMX_ADMA_ACM_MCLKOUT0_SEL, imx8dxl_mclk_out_sels, ARRAY_SIZE(imx8dxl_mclk_out_sels), 0x020000, 0, 3 },
	{ "acm_mclkout1_sel", IMX_ADMA_ACM_MCLKOUT1_SEL, imx8dxl_mclk_out_sels, ARRAY_SIZE(imx8dxl_mclk_out_sels), 0x030000, 0, 3 },
	{ "acm_sai0_mclk_sel", IMX_ADMA_ACM_SAI0_MCLK_SEL, imx8dxl_mclk_sels, ARRAY_SIZE(imx8dxl_mclk_sels), 0x0E0000, 0, 2 },
	{ "acm_sai1_mclk_sel", IMX_ADMA_ACM_SAI1_MCLK_SEL, imx8dxl_mclk_sels, ARRAY_SIZE(imx8dxl_mclk_sels), 0x0F0000, 0, 2 },
	{ "acm_sai2_mclk_sel", IMX_ADMA_ACM_SAI2_MCLK_SEL, imx8dxl_mclk_sels, ARRAY_SIZE(imx8dxl_mclk_sels), 0x100000, 0, 2 },
	{ "acm_sai3_mclk_sel", IMX_ADMA_ACM_SAI3_MCLK_SEL, imx8dxl_mclk_sels, ARRAY_SIZE(imx8dxl_mclk_sels), 0x110000, 0, 2 },
	{ "acm_spdif0_mclk_sel", IMX_ADMA_ACM_SPDIF0_TX_CLK_SEL, imx8dxl_mclk_sels, ARRAY_SIZE(imx8dxl_mclk_sels), 0x1A0000, 0, 2 },
	{ "acm_mqs_mclk_sel", IMX_ADMA_ACM_MQS_TX_CLK_SEL, imx8dxl_mclk_sels, ARRAY_SIZE(imx8dxl_mclk_sels), 0x1C0000, 0, 2 },
};

/**
 * clk_imx_acm_attach_pm_domains: attach multi power domains
 * @dev: device pointer
 * @dev_pm: power domains for device
 */
static int clk_imx_acm_attach_pm_domains(struct device *dev,
					 struct clk_imx_acm_pm_domains *dev_pm)
{
	int ret;
	int i;

	dev_pm->num_domains = of_count_phandle_with_args(dev->of_node, "power-domains",
							 "#power-domain-cells");
	if (dev_pm->num_domains <= 1)
		return 0;

	dev_pm->pd_dev = devm_kmalloc_array(dev, dev_pm->num_domains,
					    sizeof(*dev_pm->pd_dev),
					    GFP_KERNEL);
	if (!dev_pm->pd_dev)
		return -ENOMEM;

	dev_pm->pd_dev_link = devm_kmalloc_array(dev,
						 dev_pm->num_domains,
						 sizeof(*dev_pm->pd_dev_link),
						 GFP_KERNEL);
	if (!dev_pm->pd_dev_link)
		return -ENOMEM;

	for (i = 0; i < dev_pm->num_domains; i++) {
		dev_pm->pd_dev[i] = dev_pm_domain_attach_by_id(dev, i);
		if (IS_ERR(dev_pm->pd_dev[i])) {
			ret = PTR_ERR(dev_pm->pd_dev[i]);
			goto detach_pm;
		}

		dev_pm->pd_dev_link[i] = device_link_add(dev,
							 dev_pm->pd_dev[i],
							 DL_FLAG_STATELESS |
							 DL_FLAG_PM_RUNTIME |
							 DL_FLAG_RPM_ACTIVE);
		if (IS_ERR(dev_pm->pd_dev_link[i])) {
			dev_pm_domain_detach(dev_pm->pd_dev[i], false);
			ret = PTR_ERR(dev_pm->pd_dev_link[i]);
			goto detach_pm;
		}
	}
	return 0;

detach_pm:
	while (--i >= 0) {
		device_link_del(dev_pm->pd_dev_link[i]);
		dev_pm_domain_detach(dev_pm->pd_dev[i], false);
	}
	return ret;
}

/**
 * clk_imx_acm_detach_pm_domains: detach multi power domains
 * @dev: deivice pointer
 * @dev_pm: multi power domain for device
 */
static int clk_imx_acm_detach_pm_domains(struct device *dev,
					 struct clk_imx_acm_pm_domains *dev_pm)
{
	int i;

	if (dev_pm->num_domains <= 1)
		return 0;

	for (i = 0; i < dev_pm->num_domains; i++) {
		device_link_del(dev_pm->pd_dev_link[i]);
		dev_pm_domain_detach(dev_pm->pd_dev[i], false);
	}

	return 0;
}

static int imx8_acm_clk_probe(struct platform_device *pdev)
{
	struct clk_hw_onecell_data *clk_hw_data;
	struct device *dev = &pdev->dev;
	struct clk_imx8_acm_sel *sels;
	struct imx8_acm_priv *priv;
	struct clk_hw **hws;
	void __iomem *base;
	int ret;
	int i;

	base = devm_of_iomap(dev, dev->of_node, 0, NULL);
	if (WARN_ON(IS_ERR(base)))
		return PTR_ERR(base);

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->reg = base;
	priv->soc_data = of_device_get_match_data(dev);
	platform_set_drvdata(pdev, priv);

	clk_hw_data = devm_kzalloc(&pdev->dev, struct_size(clk_hw_data, hws, IMX_ADMA_ACM_CLK_END),
				   GFP_KERNEL);
	if (!clk_hw_data)
		return -ENOMEM;

	clk_hw_data->num = IMX_ADMA_ACM_CLK_END;
	hws = clk_hw_data->hws;

	ret = clk_imx_acm_attach_pm_domains(&pdev->dev, &priv->dev_pm);
	if (ret)
		return ret;

	pm_runtime_enable(&pdev->dev);
	pm_runtime_get_sync(&pdev->dev);

	sels = priv->soc_data->sels;
	for (i = 0; i < priv->soc_data->num_sels; i++) {
		hws[sels[i].clkid] = devm_clk_hw_register_mux_parent_data_table(dev,
										sels[i].name, sels[i].parents,
										sels[i].num_parents, 0,
										base + sels[i].reg,
										sels[i].shift, sels[i].width,
										0, NULL, NULL);
		if (IS_ERR(hws[sels[i].clkid])) {
			ret = PTR_ERR(hws[sels[i].clkid]);
			goto err_clk_register;
		}
	}

	imx_check_clk_hws(hws, IMX_ADMA_ACM_CLK_END);

	ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clk_hw_data);
	if (ret < 0) {
		dev_err(dev, "failed to register hws for ACM\n");
		goto err_clk_register;
	}

	pm_runtime_put_sync(&pdev->dev);
	return 0;

err_clk_register:
	pm_runtime_put_sync(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
	clk_imx_acm_detach_pm_domains(&pdev->dev, &priv->dev_pm);

	return ret;
}

static int imx8_acm_clk_remove(struct platform_device *pdev)
{
	struct imx8_acm_priv *priv = dev_get_drvdata(&pdev->dev);

	pm_runtime_disable(&pdev->dev);

	clk_imx_acm_detach_pm_domains(&pdev->dev, &priv->dev_pm);

	return 0;
}

static const struct imx8_acm_soc_data imx8qm_acm_data = {
	.sels = imx8qm_sels,
	.num_sels = ARRAY_SIZE(imx8qm_sels),
};

static const struct imx8_acm_soc_data imx8qxp_acm_data = {
	.sels = imx8qxp_sels,
	.num_sels = ARRAY_SIZE(imx8qxp_sels),
};

static const struct imx8_acm_soc_data imx8dxl_acm_data = {
	.sels = imx8dxl_sels,
	.num_sels = ARRAY_SIZE(imx8dxl_sels),
};

static const struct of_device_id imx8_acm_match[] = {
	{ .compatible = "fsl,imx8qm-acm", .data = &imx8qm_acm_data },
	{ .compatible = "fsl,imx8qxp-acm", .data = &imx8qxp_acm_data },
	{ .compatible = "fsl,imx8dxl-acm", .data = &imx8dxl_acm_data },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx8_acm_match);

static int __maybe_unused imx8_acm_runtime_suspend(struct device *dev)
{
	struct imx8_acm_priv *priv = dev_get_drvdata(dev);
	struct clk_imx8_acm_sel *sels;
	int i;

	sels = priv->soc_data->sels;

	for (i = 0; i < priv->soc_data->num_sels; i++)
		priv->regs[i] = readl_relaxed(priv->reg + sels[i].reg);

	return 0;
}

static int __maybe_unused imx8_acm_runtime_resume(struct device *dev)
{
	struct imx8_acm_priv *priv = dev_get_drvdata(dev);
	struct clk_imx8_acm_sel *sels;
	int i;

	sels = priv->soc_data->sels;

	for (i = 0; i < priv->soc_data->num_sels; i++)
		writel_relaxed(priv->regs[i], priv->reg + sels[i].reg);

	return 0;
}

static const struct dev_pm_ops imx8_acm_pm_ops = {
	SET_RUNTIME_PM_OPS(imx8_acm_runtime_suspend,
			   imx8_acm_runtime_resume, NULL)
	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
				      pm_runtime_force_resume)
};

static struct platform_driver imx8_acm_clk_driver = {
	.driver = {
		.name = "imx8-acm",
		.of_match_table = imx8_acm_match,
		.pm = &imx8_acm_pm_ops,
	},
	.probe = imx8_acm_clk_probe,
	.remove = imx8_acm_clk_remove,
};
module_platform_driver(imx8_acm_clk_driver);

MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
MODULE_DESCRIPTION("Freescale i.MX8 Audio Clock Mux driver");
MODULE_LICENSE("GPL");