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From:   Shengjiu Wang <shengjiu.wang@nxp.com>
To:     abelvesa@kernel.org, peng.fan@nxp.com, mturquette@baylibre.com,
        sboyd@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
        shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de,
        festevam@gmail.com, linux-imx@nxp.com, shengjiu.wang@gmail.com
Cc:     linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v7 2/2] clk: imx: imx8: add audio clock mux driver
Date:   Tue, 25 Jul 2023 12:56:24 +0800
Message-Id: <1690260984-25744-3-git-send-email-shengjiu.wang@nxp.com>
In-Reply-To: <1690260984-25744-1-git-send-email-shengjiu.wang@nxp.com>
References: <1690260984-25744-1-git-send-email-shengjiu.wang@nxp.com>
Precedence: bulk

The Audio Clock Mux (ACM) is a collection of control registers
and multiplexers that are used to route the audio source clocks
to the audio peripherals.

Each audio peripheral has its dedicated audio clock mux
(which differ based on usage) and control register.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
---
changes in v7:
- none

changes in v6:
- change : to - for kerneldoc
- remove .name in clk_parent_data structure
- change .name = "dummy" to .index = -1

changes in v5:
- update copyright
- use devm_of_iomap
- use devm_kzalloc for clk_hw_data

changes in v4:
- fix the error for module build reported by kernel test robot

changes in v3:
- change compatible string from nxp to fsl

changes in v2:
- none

 drivers/clk/imx/Makefile       |   3 +-
 drivers/clk/imx/clk-imx8-acm.c | 476 +++++++++++++++++++++++++++++++++
 2 files changed, 478 insertions(+), 1 deletion(-)
 create mode 100644 drivers/clk/imx/clk-imx8-acm.c

diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile
index ae9d84ef046b..d4b8e10b1970 100644
--- a/drivers/clk/imx/Makefile
+++ b/drivers/clk/imx/Makefile
@@ -32,11 +32,12 @@ obj-$(CONFIG_CLK_IMX8MQ) += clk-imx8mq.o
 
 obj-$(CONFIG_CLK_IMX93) += clk-imx93.o
 
-obj-$(CONFIG_MXC_CLK_SCU) += clk-imx-scu.o clk-imx-lpcg-scu.o
+obj-$(CONFIG_MXC_CLK_SCU) += clk-imx-scu.o clk-imx-lpcg-scu.o clk-imx-acm.o
 clk-imx-scu-$(CONFIG_CLK_IMX8QXP) += clk-scu.o clk-imx8qxp.o \
 				     clk-imx8qxp-rsrc.o clk-imx8qm-rsrc.o \
 				     clk-imx8dxl-rsrc.o
 clk-imx-lpcg-scu-$(CONFIG_CLK_IMX8QXP) += clk-lpcg-scu.o clk-imx8qxp-lpcg.o
+clk-imx-acm-$(CONFIG_CLK_IMX8QXP) = clk-imx8-acm.o
 
 obj-$(CONFIG_CLK_IMX8ULP) += clk-imx8ulp.o
 
diff --git a/drivers/clk/imx/clk-imx8-acm.c b/drivers/clk/imx/clk-imx8-acm.c
new file mode 100644
index 000000000000..1e82f72b75c6
--- /dev/null
+++ b/drivers/clk/imx/clk-imx8-acm.c
@@ -0,0 +1,476 @@
+// 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]))
+			return PTR_ERR(dev_pm->pd_dev[i]);
+
+		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])) {
+			pm_runtime_disable(&pdev->dev);
+			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");
+		pm_runtime_disable(&pdev->dev);
+	}
+
+err_clk_register:
+
+	pm_runtime_put_sync(&pdev->dev);
+
+	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");
-- 
2.34.1