ASoC: fsl_sai: Add support for i.MX8MM

On i.MX8MM the max register is FSL_SAI_MCTL, which is
different with previous platform, so add max_register in
soc data to distinguish platforms.
And add specific soc data for i.MX8MM
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/1652688372-10274-2-git-send-email-shengjiu.wang@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_sai.c

@@ -1203,6 +1203,7 @@ static const struct fsl_sai_soc_data fsl_sai_vf610_data = {
 	.reg_offset = 0,
 	.mclk0_is_mclk1 = false,
 	.flags = 0,
+	.max_register = FSL_SAI_RMR,
 };
 
 static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = {
@@ -1213,6 +1214,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = {
 	.reg_offset = 0,
 	.mclk0_is_mclk1 = true,
 	.flags = 0,
+	.max_register = FSL_SAI_RMR,
 };
 
 static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = {
@@ -1223,6 +1225,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = {
 	.reg_offset = 8,
 	.mclk0_is_mclk1 = false,
 	.flags = PMQOS_CPU_LATENCY,
+	.max_register = FSL_SAI_RMR,
 };
 
 static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = {
@@ -1233,6 +1236,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = {
 	.reg_offset = 8,
 	.mclk0_is_mclk1 = false,
 	.flags = 0,
+	.max_register = FSL_SAI_RMR,
 };
 
 static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = {
@@ -1243,6 +1247,18 @@ static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = {
 	.reg_offset = 0,
 	.mclk0_is_mclk1 = false,
 	.flags = 0,
+	.max_register = FSL_SAI_RMR,
+};
+
+static const struct fsl_sai_soc_data fsl_sai_imx8mm_data = {
+	.use_imx_pcm = true,
+	.use_edma = false,
+	.fifo_depth = 128,
+	.reg_offset = 8,
+	.mclk0_is_mclk1 = false,
+	.pins = 8,
+	.flags = 0,
+	.max_register = FSL_SAI_MCTL,
 };
 
 static const struct of_device_id fsl_sai_ids[] = {
@@ -1252,6 +1268,7 @@ static const struct of_device_id fsl_sai_ids[] = {
 	{ .compatible = "fsl,imx7ulp-sai", .data = &fsl_sai_imx7ulp_data },
 	{ .compatible = "fsl,imx8mq-sai", .data = &fsl_sai_imx8mq_data },
 	{ .compatible = "fsl,imx8qm-sai", .data = &fsl_sai_imx8qm_data },
+	{ .compatible = "fsl,imx8mm-sai", .data = &fsl_sai_imx8mm_data },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, fsl_sai_ids);

sound/soc/fsl/fsl_sai.h

@@ -223,6 +223,7 @@ struct fsl_sai_soc_data {
 	unsigned int pins;
 	unsigned int reg_offset;
 	unsigned int flags;
+	unsigned int max_register;
 };
 
 /**