Re: [PATCH v2 7/8] reset: imx8mp-audiomix: Support i.MX8ULP SIM LPAV

Laurentiu Mihalcea
2025-10-20T14:29:34Z

On 10/17/2025 7:57 AM, Frank Li wrote:
> On Fri, Oct 17, 2025 at 04:20:24AM -0700, Laurentiu Mihalcea wrote:
>> From: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
>>
>> Support i.MX8ULP's SIM LPAV by adding its reset map definition.
>>
>> Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
>> Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
>> ---
>> drivers/reset/reset-imx8mp-audiomix.c | 51 +++++++++++++++++++++++++++
>> 1 file changed, 51 insertions(+)
>>
>> diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c
>> index c370913107f5..b333d7c1442a 100644
>> --- a/drivers/reset/reset-imx8mp-audiomix.c
>> +++ b/drivers/reset/reset-imx8mp-audiomix.c
>> @@ -3,6 +3,7 @@
>> * Copyright 2024 NXP
>> */
>>
>> +#include <dt-bindings/reset/fsl,imx8ulp-sim-lpav.h>
>> #include <dt-bindings/reset/imx8mp-reset-audiomix.h>
>>
>> #include <linux/auxiliary_bus.h>
>> @@ -17,6 +18,8 @@
>> #define IMX8MP_AUDIOMIX_EARC_RESET_OFFSET 0x200
>> #define IMX8MP_AUDIOMIX_DSP_RUNSTALL_OFFSET 0x108
>>
>> +#define IMX8ULP_SIM_LPAV_SYSCTRL0_OFFSET 0x8
>> +
>> struct imx8mp_reset_map {
>> unsigned int offset;
>> unsigned int mask;
>> @@ -55,6 +58,50 @@ static const struct imx8mp_reset_info imx8mp_reset_info = {
>> .num_lines = ARRAY_SIZE(imx8mp_reset_map),
>> };
>>
>> +static const struct imx8mp_reset_map imx8ulp_reset_map[] = {
>> + [IMX8ULP_SIM_LPAV_HIFI4_DSP_DBG_RST] = {
>> + .offset = IMX8ULP_SIM_LPAV_SYSCTRL0_OFFSET,
>> + .mask = BIT(25),
> Register defination still perfer use macro. If not, let me know.

I see no value in adding defines for the masks (see patch 4 commit message)

in this particular scenario.

Is the assignment of the "mask" field for the "struct imx8mp_reset_map" item found

at index  IMX8ULP_SIM_LPAV_HIFI4_DSP_DBG_RST not enough to deduce that the

constant we're using is the mask for the DSP_DBG_RST bit?

>
> Frank
>> + .shift = 25,
>> + .active_low = false,
>> + },
>> + [IMX8ULP_SIM_LPAV_HIFI4_DSP_RST] = {
>> + .offset = IMX8ULP_SIM_LPAV_SYSCTRL0_OFFSET,
>> + .mask = BIT(16),
>> + .shift = 16,
>> + .active_low = false,
>> + },
>> + [IMX8ULP_SIM_LPAV_HIFI4_DSP_STALL] = {
>> + .offset = IMX8ULP_SIM_LPAV_SYSCTRL0_OFFSET,
>> + .mask = BIT(13),
>> + .shift = 13,
>> + .active_low = false,
>> + },
>> + [IMX8ULP_SIM_LPAV_DSI_RST_BYTE_N] = {
>> + .offset = IMX8ULP_SIM_LPAV_SYSCTRL0_OFFSET,
>> + .mask = BIT(5),
>> + .shift = 5,
>> + .active_low = true,
>> + },
>> + [IMX8ULP_SIM_LPAV_DSI_RST_ESC_N] = {
>> + .offset = IMX8ULP_SIM_LPAV_SYSCTRL0_OFFSET,
>> + .mask = BIT(4),
>> + .shift = 4,
>> + .active_low = true,
>> + },
>> + [IMX8ULP_SIM_LPAV_DSI_RST_DPI_N] = {
>> + .offset = IMX8ULP_SIM_LPAV_SYSCTRL0_OFFSET,
>> + .mask = BIT(3),
>> + .shift = 3,
>> + .active_low = true,
>> + },
>> +};
>> +
>> +static const struct imx8mp_reset_info imx8ulp_reset_info = {
>> + .map = imx8ulp_reset_map,
>> + .num_lines = ARRAY_SIZE(imx8ulp_reset_map),
>> +};
>> +
>> struct imx8mp_audiomix_reset {
>> struct reset_controller_dev rcdev;
>> void __iomem *base;
>> @@ -183,6 +230,10 @@ static const struct auxiliary_device_id imx8mp_audiomix_reset_ids[] = {
>> .name = "clk_imx8mp_audiomix.reset",
>> .driver_data = (kernel_ulong_t)&imx8mp_reset_info,
>> },
>> + {
>> + .name = "clk_imx8ulp_sim_lpav.reset",
>> + .driver_data = (kernel_ulong_t)&imx8ulp_reset_info,
>> + },
>> { }
>> };
>> MODULE_DEVICE_TABLE(auxiliary, imx8mp_audiomix_reset_ids);
>> --
>> 2.43.0
>>