Re: [PATCH v4 3/3] clk: imx: imx8: add audio clock mux driver

From: Daniel Baluta
Date: Tue Jul 11 2023 - 07:57:38 EST

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In reply to: Shengjiu Wang: "[PATCH v4 3/3] clk: imx: imx8: add audio clock mux driver"
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On Tue, Jul 11, 2023 at 5:30 AM Shengjiu Wang <shengjiu.wang@xxxxxxx> wrote:
>
> 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@xxxxxxx>
> ---
> 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 | 477 +++++++++++++++++++++++++++++++++
> 2 files changed, 479 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..eb4eacba267a
> --- /dev/null
> +++ b/drivers/clk/imx/clk-imx8-acm.c
> @@ -0,0 +1,477 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +//
> +// Copyright 2018-2023 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", .name = "aud_rec_clk0_lpcg_clk" },
> + {.fw_name = "aud_rec_clk1_lpcg_clk", .name = "aud_rec_clk1_lpcg_clk" },
> + {.fw_name = "mlb_clk", .name = "mlb_clk" },
> + {.fw_name = "hdmi_rx_mclk", .name = "hdmi_rx_mclk" },
> + {.fw_name = "ext_aud_mclk0", .name = "ext_aud_mclk0" },
> + {.fw_name = "ext_aud_mclk1", .name = "ext_aud_mclk1" },
> + {.fw_name = "esai0_rx_clk", .name = "esai0_rx_clk" },
> + {.fw_name = "esai0_rx_hf_clk", .name = "esai0_rx_hf_clk" },
> + {.fw_name = "esai0_tx_clk", .name = "esai0_tx_clk" },
> + {.fw_name = "esai0_tx_hf_clk", .name = "esai0_tx_hf_clk" },
> + {.fw_name = "esai1_rx_clk", .name = "esai1_rx_clk" },
> + {.fw_name = "esai1_rx_hf_clk", .name = "esai1_rx_hf_clk" },
> + {.fw_name = "esai1_tx_clk", .name = "esai1_tx_clk" },
> + {.fw_name = "esai1_tx_hf_clk", .name = "esai1_tx_hf_clk" },
> + {.fw_name = "spdif0_rx", .name = "spdif0_rx" },
> + {.fw_name = "spdif1_rx", .name = "spdif1_rx" },
> + {.fw_name = "sai0_rx_bclk", .name = "sai0_rx_bclk" },
> + {.fw_name = "sai0_tx_bclk", .name = "sai0_tx_bclk" },
> + {.fw_name = "sai1_rx_bclk", .name = "sai1_rx_bclk" },
> + {.fw_name = "sai1_tx_bclk", .name = "sai1_tx_bclk" },
> + {.fw_name = "sai2_rx_bclk", .name = "sai2_rx_bclk" },
> + {.fw_name = "sai3_rx_bclk", .name = "sai3_rx_bclk" },
> + {.fw_name = "sai4_rx_bclk", .name = "sai4_rx_bclk" },
> +};
> +
> +static const struct clk_parent_data imx8qm_mclk_out_sels[] = {
> + {.fw_name = "aud_rec_clk0_lpcg_clk", .name = "aud_rec_clk0_lpcg_clk" },
> + {.fw_name = "aud_rec_clk1_lpcg_clk", .name = "aud_rec_clk1_lpcg_clk" },
> + {.fw_name = "mlb_clk", .name = "mlb_clk" },
> + {.fw_name = "hdmi_rx_mclk", .name = "hdmi_rx_mclk" },
> + {.fw_name = "spdif0_rx", .name = "spdif0_rx" },
> + {.fw_name = "spdif1_rx", .name = "spdif1_rx" },
> + {.fw_name = "sai4_rx_bclk", .name = "sai4_rx_bclk" },
> + {.fw_name = "sai6_rx_bclk", .name = "sai6_rx_bclk" },
> +};
> +
> +static const struct clk_parent_data imx8qm_mclk_sels[] = {
> + {.fw_name = "aud_pll_div_clk0_lpcg_clk", .name = "aud_pll_div_clk0_lpcg_clk" },
> + {.fw_name = "aud_pll_div_clk1_lpcg_clk", .name = "aud_pll_div_clk1_lpcg_clk" },
> + {.fw_name = "acm_aud_clk0_sel", .name = "acm_aud_clk0_sel" },
> + {.fw_name = "acm_aud_clk1_sel", .name = "acm_aud_clk1_sel" },
> +};
> +
> +static const struct clk_parent_data imx8qm_asrc_mux_clk_sels[] = {
> + {.fw_name = "sai4_rx_bclk", .name = "sai4_rx_bclk" },
> + {.fw_name = "sai5_tx_bclk", .name = "sai5_tx_bclk" },
> + {.name = "dummy" },
> + {.fw_name = "mlb_clk", .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", .name = "aud_rec_clk0_lpcg_clk" },
> + {.fw_name = "aud_rec_clk1_lpcg_clk", .name = "aud_rec_clk1_lpcg_clk" },
> + {.fw_name = "ext_aud_mclk0", .name = "ext_aud_mclk0" },
> + {.fw_name = "ext_aud_mclk1", .name = "ext_aud_mclk1" },
> + {.fw_name = "esai0_rx_clk", .name = "esai0_rx_clk" },
> + {.fw_name = "esai0_rx_hf_clk", .name = "esai0_rx_hf_clk" },
> + {.fw_name = "esai0_tx_clk", .name = "esai0_tx_clk" },
> + {.fw_name = "esai0_tx_hf_clk", .name = "esai0_tx_hf_clk" },
> + {.fw_name = "spdif0_rx", .name = "spdif0_rx" },
> + {.fw_name = "sai0_rx_bclk", .name = "sai0_rx_bclk" },
> + {.fw_name = "sai0_tx_bclk", .name = "sai0_tx_bclk" },
> + {.fw_name = "sai1_rx_bclk", .name = "sai1_rx_bclk" },
> + {.fw_name = "sai1_tx_bclk", .name = "sai1_tx_bclk" },
> + {.fw_name = "sai2_rx_bclk", .name = "sai2_rx_bclk" },
> + {.fw_name = "sai3_rx_bclk", .name = "sai3_rx_bclk" },
> +};
> +
> +static const struct clk_parent_data imx8qxp_mclk_out_sels[] = {
> + {.fw_name = "aud_rec_clk0_lpcg_clk", .name = "aud_rec_clk0_lpcg_clk" },
> + {.fw_name = "aud_rec_clk1_lpcg_clk", .name = "aud_rec_clk1_lpcg_clk" },
> + {.name = "dummy" },
> + {.name = "dummy" },
> + {.fw_name = "spdif0_rx", .name = "spdif0_rx" },
> + {.name = "dummy" },
> + {.name = "dummy" },
> + {.fw_name = "sai4_rx_bclk", .name = "sai4_rx_bclk" },
> +};
> +
> +static const struct clk_parent_data imx8qxp_mclk_sels[] = {
> + {.fw_name = "aud_pll_div_clk0_lpcg_clk", .name = "aud_pll_div_clk0_lpcg_clk" },
> + {.fw_name = "aud_pll_div_clk1_lpcg_clk", .name = "aud_pll_div_clk1_lpcg_clk" },
> + {.fw_name = "acm_aud_clk0_sel", .name = "acm_aud_clk0_sel" },
> + {.fw_name = "acm_aud_clk1_sel", .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", .name = "aud_rec_clk0_lpcg_clk" },
> + {.fw_name = "aud_rec_clk1_lpcg_clk", .name = "aud_rec_clk1_lpcg_clk" },
> + {.fw_name = "ext_aud_mclk0", .name = "ext_aud_mclk0" },
> + {.fw_name = "ext_aud_mclk1", .name = "ext_aud_mclk1" },
> + {.name = "dummy" },
> + {.name = "dummy" },
> + {.name = "dummy" },
> + {.name = "dummy" },
> +
> + {.fw_name = "spdif0_rx", .name = "spdif0_rx" },
> + {.fw_name = "sai0_rx_bclk", .name = "sai0_rx_bclk" },
> + {.fw_name = "sai0_tx_bclk", .name = "sai0_tx_bclk" },
> + {.fw_name = "sai1_rx_bclk", .name = "sai1_rx_bclk" },
> + {.fw_name = "sai1_tx_bclk", .name = "sai1_tx_bclk" },
> + {.fw_name = "sai2_rx_bclk", .name = "sai2_rx_bclk" },
> + {.fw_name = "sai3_rx_bclk", .name = "sai3_rx_bclk" },
> +};
> +
> +static const struct clk_parent_data imx8dxl_mclk_out_sels[] = {
> + {.fw_name = "aud_rec_clk0_lpcg_clk", .name = "aud_rec_clk0_lpcg_clk" },
> + {.fw_name = "aud_rec_clk1_lpcg_clk", .name = "aud_rec_clk1_lpcg_clk" },
> + {.name = "dummy" },
> + {.name = "dummy" },
> + {.fw_name = "spdif0_rx", .name = "spdif0_rx" },
> + {.name = "dummy" },
> + {.name = "dummy" },
> + {.name = "dummy" },
> +};
> +
> +static const struct clk_parent_data imx8dxl_mclk_sels[] = {
> + {.fw_name = "aud_pll_div_clk0_lpcg_clk", .name = "aud_pll_div_clk0_lpcg_clk" },
> + {.fw_name = "aud_pll_div_clk1_lpcg_clk", .name = "aud_pll_div_clk1_lpcg_clk" },
> + {.fw_name = "acm_aud_clk0_sel", .name = "acm_aud_clk0_sel" },
> + {.fw_name = "acm_aud_clk1_sel", .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 resource *res;
> + struct clk_hw **hws;
> + void __iomem *base;
> + int ret;
> + int i;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + base = devm_ioremap(dev, res->start, resource_size(res));
> + if (!base)
> + return -ENOMEM;
> +
> + 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 = kzalloc(struct_size(clk_hw_data, hws,
> + IMX_ADMA_ACM_CLK_END), GFP_KERNEL);

Should we also use devm_kzalloc here?

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