[PATCH v3 0/7] Patches to update for rockchip pdm

[PATCH v3 0/7] Patches to update for rockchip pdm

[Sugar Zhang]

These patches fixup or update for rockchip pdm.

Changes in v3:
- Fix property 'path-map' suggested by Rob Herring.

Changes in v2:
- Fix yamllint errors.

Sugar Zhang (7):
  ASoC: rockchip: Add support for rv1126 pdm
  ASoC: dt-bindings: rockchip: Add binding for rv1126 pdm
  ASoC: rockchip: pdm: Add support for rk3568 pdm
  ASoC: dt-bindings: rockchip: Add binding for rk3568 pdm
  ASoC: rockchip: pdm: Add support for path map
  ASoC: dt-bindings: rockchip: pdm: Document property
    'rockchip,path-map'
  ASoC: dt-bindings: rockchip: Convert pdm bindings to yaml

 .../devicetree/bindings/sound/rockchip,pdm.txt     |  46 --------
 .../devicetree/bindings/sound/rockchip,pdm.yaml    | 120 +++++++++++++++++++++
 sound/soc/rockchip/rockchip_pdm.c                  | 112 +++++++++++++++++--
 sound/soc/rockchip/rockchip_pdm.h                  |   6 ++
 4 files changed, 232 insertions(+), 52 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/sound/rockchip,pdm.txt
 create mode 100644 Documentation/devicetree/bindings/sound/rockchip,pdm.yaml

-- 
2.7.4

[PATCH v3 1/7] ASoC: rockchip: Add support for rv1126 pdm

[Sugar Zhang]

This patch adds support for rv1126 pdm controller which
redesign cic filiter for better performance.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 sound/soc/rockchip/rockchip_pdm.c | 76 +++++++++++++++++++++++++++++++++++----
 sound/soc/rockchip/rockchip_pdm.h |  3 ++
 2 files changed, 73 insertions(+), 6 deletions(-)

diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c
index 38bd603..67634d1 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -24,6 +24,7 @@
 enum rk_pdm_version {
 	RK_PDM_RK3229,
 	RK_PDM_RK3308,
+	RK_PDM_RV1126,
 };
 
 struct rk_pdm_dev {
@@ -121,6 +122,55 @@ static unsigned int get_pdm_ds_ratio(unsigned int sr)
 	return ratio;
 }
 
+static unsigned int get_pdm_cic_ratio(unsigned int clk)
+{
+	switch (clk) {
+	case 4096000:
+	case 5644800:
+	case 6144000:
+		return 0;
+	case 2048000:
+	case 2822400:
+	case 3072000:
+		return 1;
+	case 1024000:
+	case 1411200:
+	case 1536000:
+		return 2;
+	default:
+		return 1;
+	}
+}
+
+static unsigned int samplerate_to_bit(unsigned int samplerate)
+{
+	switch (samplerate) {
+	case 8000:
+	case 11025:
+	case 12000:
+		return 0;
+	case 16000:
+	case 22050:
+	case 24000:
+		return 1;
+	case 32000:
+		return 2;
+	case 44100:
+	case 48000:
+		return 3;
+	case 64000:
+	case 88200:
+	case 96000:
+		return 4;
+	case 128000:
+	case 176400:
+	case 192000:
+		return 5;
+	default:
+		return 1;
+	}
+}
+
 static inline struct rk_pdm_dev *to_info(struct snd_soc_dai *dai)
 {
 	return snd_soc_dai_get_drvdata(dai);
@@ -166,7 +216,8 @@ static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
 	if (ret)
 		return -EINVAL;
 
-	if (pdm->version == RK_PDM_RK3308) {
+	if (pdm->version == RK_PDM_RK3308 ||
+	    pdm->version == RK_PDM_RV1126) {
 		rational_best_approximation(clk_out, clk_src,
 					    GENMASK(16 - 1, 0),
 					    GENMASK(16 - 1, 0),
@@ -194,8 +245,18 @@ static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
 				   PDM_CLK_FD_RATIO_MSK,
 				   val);
 	}
-	val = get_pdm_ds_ratio(samplerate);
-	regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_DS_RATIO_MSK, val);
+
+	if (pdm->version == RK_PDM_RV1126) {
+		val = get_pdm_cic_ratio(clk_out);
+		regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_CIC_RATIO_MSK, val);
+		val = samplerate_to_bit(samplerate);
+		regmap_update_bits(pdm->regmap, PDM_CTRL0,
+				   PDM_SAMPLERATE_MSK, PDM_SAMPLERATE(val));
+	} else {
+		val = get_pdm_ds_ratio(samplerate);
+		regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_DS_RATIO_MSK, val);
+	}
+
 	regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
 			   PDM_HPF_CF_MSK, PDM_HPF_60HZ);
 	regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
@@ -441,9 +502,10 @@ static bool rockchip_pdm_precious_reg(struct device *dev, unsigned int reg)
 }
 
 static const struct reg_default rockchip_pdm_reg_defaults[] = {
-	{0x04, 0x78000017},
-	{0x08, 0x0bb8ea60},
-	{0x18, 0x0000001f},
+	{ PDM_CTRL0, 0x78000017 },
+	{ PDM_CTRL1, 0x0bb8ea60 },
+	{ PDM_CLK_CTRL, 0x0000e401 },
+	{ PDM_DMA_CTRL, 0x0000001f },
 };
 
 static const struct regmap_config rockchip_pdm_regmap_config = {
@@ -469,6 +531,8 @@ static const struct of_device_id rockchip_pdm_match[] __maybe_unused = {
 	  .data = (void *)RK_PDM_RK3308 },
 	{ .compatible = "rockchip,rk3308-pdm",
 	  .data = (void *)RK_PDM_RK3308 },
+	{ .compatible = "rockchip,rv1126-pdm",
+	  .data = (void *)RK_PDM_RV1126 },
 	{},
 };
 MODULE_DEVICE_TABLE(of, rockchip_pdm_match);
diff --git a/sound/soc/rockchip/rockchip_pdm.h b/sound/soc/rockchip/rockchip_pdm.h
index 8e5bbaf..13bfbc2 100644
--- a/sound/soc/rockchip/rockchip_pdm.h
+++ b/sound/soc/rockchip/rockchip_pdm.h
@@ -41,6 +41,8 @@
 #define PDM_PATH1_EN		BIT(28)
 #define PDM_PATH0_EN		BIT(27)
 #define PDM_HWT_EN		BIT(26)
+#define PDM_SAMPLERATE_MSK	GENMASK(7, 5)
+#define PDM_SAMPLERATE(x)	((x) << 5)
 #define PDM_VDW_MSK		(0x1f << 0)
 #define PDM_VDW(X)		((X - 1) << 0)
 
@@ -66,6 +68,7 @@
 #define PDM_CLK_1280FS		(0x2 << 0)
 #define PDM_CLK_2560FS		(0x3 << 0)
 #define PDM_CLK_5120FS		(0x4 << 0)
+#define PDM_CIC_RATIO_MSK	(0x3 << 0)
 
 /* PDM HPF CTRL */
 #define PDM_HPF_LE		BIT(3)
-- 
2.7.4

[PATCH v3 2/7] ASoC: dt-bindings: rockchip: Add binding for rv1126 pdm

[Sugar Zhang]

This patch documents for rv1126 pdm.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 Documentation/devicetree/bindings/sound/rockchip,pdm.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
index 98572a2..60e8630 100644
--- a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
+++ b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
@@ -6,6 +6,7 @@ Required properties:
   - "rockchip,px30-pdm"
   - "rockchip,rk1808-pdm"
   - "rockchip,rk3308-pdm"
+  - "rockchip,rv1126-pdm"
 - reg: physical base address of the controller and length of memory mapped
   region.
 - dmas: DMA specifiers for rx dma. See the DMA client binding,
-- 
2.7.4

Re: [PATCH v3 2/7] ASoC: dt-bindings: rockchip: Add binding for rv1126 pdm

[Rob Herring]

On Wed, 01 Sep 2021 11:47:58 +0800, Sugar Zhang wrote:
> This patch documents for rv1126 pdm.
> 
> Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
> ---
> 
> Changes in v3: None
> Changes in v2: None
> 
>  Documentation/devicetree/bindings/sound/rockchip,pdm.txt | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

[PATCH v3 3/7] ASoC: rockchip: pdm: Add support for rk3568 pdm

[Sugar Zhang]

This patch adds compatible for rk3568 which is the same
with rv1126.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 sound/soc/rockchip/rockchip_pdm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c
index 67634d1..f2bf023 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -531,6 +531,8 @@ static const struct of_device_id rockchip_pdm_match[] __maybe_unused = {
 	  .data = (void *)RK_PDM_RK3308 },
 	{ .compatible = "rockchip,rk3308-pdm",
 	  .data = (void *)RK_PDM_RK3308 },
+	{ .compatible = "rockchip,rk3568-pdm",
+	  .data = (void *)RK_PDM_RV1126 },
 	{ .compatible = "rockchip,rv1126-pdm",
 	  .data = (void *)RK_PDM_RV1126 },
 	{},
-- 
2.7.4

[PATCH v3 4/7] ASoC: dt-bindings: rockchip: Add binding for rk3568 pdm

[Sugar Zhang]

This patch documents for rk3568 pdm.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 Documentation/devicetree/bindings/sound/rockchip,pdm.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
index 60e8630..54d94438 100644
--- a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
+++ b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
@@ -6,6 +6,7 @@ Required properties:
   - "rockchip,px30-pdm"
   - "rockchip,rk1808-pdm"
   - "rockchip,rk3308-pdm"
+  - "rockchip,rk3568-pdm"
   - "rockchip,rv1126-pdm"
 - reg: physical base address of the controller and length of memory mapped
   region.
-- 
2.7.4

Re: [PATCH v3 4/7] ASoC: dt-bindings: rockchip: Add binding for rk3568 pdm

[Rob Herring]

On Wed, 01 Sep 2021 11:48:00 +0800, Sugar Zhang wrote:
> This patch documents for rk3568 pdm.
> 
> Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
> ---
> 
> Changes in v3: None
> Changes in v2: None
> 
>  Documentation/devicetree/bindings/sound/rockchip,pdm.txt | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

[PATCH v3 5/7] ASoC: rockchip: pdm: Add support for path map

[Sugar Zhang]

This patch adds property 'rockchip,path-map' for path mapping.

e.g.

"rockchip,path-map = <3 2 1 0>" means the mapping as follows:

  path0 <-- sdi3
  path1 <-- sdi2
  path2 <-- sdi1
  path3 <-- sdi0

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 sound/soc/rockchip/rockchip_pdm.c | 34 ++++++++++++++++++++++++++++++++++
 sound/soc/rockchip/rockchip_pdm.h |  3 +++
 2 files changed, 37 insertions(+)

diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c
index f2bf023..64d9891 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -20,6 +20,7 @@
 
 #define PDM_DMA_BURST_SIZE	(8) /* size * width: 8*4 = 32 bytes */
 #define PDM_SIGNOFF_CLK_RATE	(100000000)
+#define PDM_PATH_MAX		(4)
 
 enum rk_pdm_version {
 	RK_PDM_RK3229,
@@ -539,8 +540,36 @@ static const struct of_device_id rockchip_pdm_match[] __maybe_unused = {
 };
 MODULE_DEVICE_TABLE(of, rockchip_pdm_match);
 
+static int rockchip_pdm_path_parse(struct rk_pdm_dev *pdm, struct device_node *node)
+{
+	unsigned int path[PDM_PATH_MAX];
+	int cnt = 0, ret = 0, i = 0, val = 0, msk = 0;
+
+	cnt = of_count_phandle_with_args(node, "rockchip,path-map",
+					 NULL);
+	if (cnt != PDM_PATH_MAX)
+		return cnt;
+
+	ret = of_property_read_u32_array(node, "rockchip,path-map",
+					 path, cnt);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < cnt; i++) {
+		if (path[i] >= PDM_PATH_MAX)
+			return -EINVAL;
+		msk |= PDM_PATH_MASK(i);
+		val |= PDM_PATH(i, path[i]);
+	}
+
+	regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, msk, val);
+
+	return 0;
+}
+
 static int rockchip_pdm_probe(struct platform_device *pdev)
 {
+	struct device_node *node = pdev->dev.of_node;
 	const struct of_device_id *match;
 	struct rk_pdm_dev *pdm;
 	struct resource *res;
@@ -606,6 +635,11 @@ static int rockchip_pdm_probe(struct platform_device *pdev)
 	}
 
 	rockchip_pdm_rxctrl(pdm, 0);
+
+	ret = rockchip_pdm_path_parse(pdm, node);
+	if (ret != 0 && ret != -ENOENT)
+		goto err_suspend;
+
 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
 	if (ret) {
 		dev_err(&pdev->dev, "could not register pcm: %d\n", ret);
diff --git a/sound/soc/rockchip/rockchip_pdm.h b/sound/soc/rockchip/rockchip_pdm.h
index 13bfbc2..cab9772 100644
--- a/sound/soc/rockchip/rockchip_pdm.h
+++ b/sound/soc/rockchip/rockchip_pdm.h
@@ -53,6 +53,9 @@
 #define PDM_FD_DENOMINATOR_MSK	GENMASK(15, 0)
 
 /* PDM CLK CTRL */
+#define PDM_PATH_SHIFT(x)	(8 + (x) * 2)
+#define PDM_PATH_MASK(x)	(0x3 << PDM_PATH_SHIFT(x))
+#define PDM_PATH(x, v)		((v) << PDM_PATH_SHIFT(x))
 #define PDM_CLK_FD_RATIO_MSK	BIT(6)
 #define PDM_CLK_FD_RATIO_40	(0X0 << 6)
 #define PDM_CLK_FD_RATIO_35	BIT(6)
-- 
2.7.4

[PATCH v3 6/7] ASoC: dt-bindings: rockchip: pdm: Document property 'rockchip,path-map'

[Sugar Zhang]

This is an optional property to describe data path mapping.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 Documentation/devicetree/bindings/sound/rockchip,pdm.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
index 54d94438..b2d7e47 100644
--- a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
+++ b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
@@ -24,6 +24,22 @@ Required properties:
 	     pinctrl-names. See ../pinctrl/pinctrl-bindings.txt
 	     for details of the property values.
 
+Optional properties:
+- rockchip,path-map: This is a variable length array, that shows the mapping
+  of SDIx to PATHx. By default, they are one-to-one mapping as follows:
+
+   path0 <-- sdi0
+   path1 <-- sdi1
+   path2 <-- sdi2
+   path3 <-- sdi3
+
+  e.g. "rockchip,path-map = <3 2 1 0>" means the mapping as follows:
+
+   path0 <-- sdi3
+   path1 <-- sdi2
+   path2 <-- sdi1
+   path3 <-- sdi0
+
 Example for rk3328 PDM controller:
 
 pdm: pdm@ff040000 {
-- 
2.7.4

Re: [PATCH v3 6/7] ASoC: dt-bindings: rockchip: pdm: Document property 'rockchip,path-map'

[Rob Herring]

On Wed, 01 Sep 2021 11:48:37 +0800, Sugar Zhang wrote:
> This is an optional property to describe data path mapping.
> 
> Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
> ---
> 
> Changes in v3: None
> Changes in v2: None
> 
>  Documentation/devicetree/bindings/sound/rockchip,pdm.txt | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

[PATCH v3 7/7] ASoC: dt-bindings: rockchip: Convert pdm bindings to yaml

[Sugar Zhang]

This patch converts pdm bindings to yaml.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
---

Changes in v3:
- Fix property 'path-map' suggested by Rob Herring.

Changes in v2:
- Fix yamllint errors.

 .../devicetree/bindings/sound/rockchip,pdm.txt     |  64 -----------
 .../devicetree/bindings/sound/rockchip,pdm.yaml    | 120 +++++++++++++++++++++
 2 files changed, 120 insertions(+), 64 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/sound/rockchip,pdm.txt
 create mode 100644 Documentation/devicetree/bindings/sound/rockchip,pdm.yaml

diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
deleted file mode 100644
index b2d7e47..0000000
--- a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
+++ /dev/null
@@ -1,64 +0,0 @@
-* Rockchip PDM controller
-
-Required properties:
-
-- compatible: "rockchip,pdm"
-  - "rockchip,px30-pdm"
-  - "rockchip,rk1808-pdm"
-  - "rockchip,rk3308-pdm"
-  - "rockchip,rk3568-pdm"
-  - "rockchip,rv1126-pdm"
-- reg: physical base address of the controller and length of memory mapped
-  region.
-- dmas: DMA specifiers for rx dma. See the DMA client binding,
-	Documentation/devicetree/bindings/dma/dma.txt
-- dma-names: should include "rx".
-- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names.
-- clock-names: should contain following:
-   - "pdm_hclk": clock for PDM BUS
-   - "pdm_clk" : clock for PDM controller
-- resets: a list of phandle + reset-specifer paris, one for each entry in reset-names.
-- reset-names: reset names, should include "pdm-m".
-- pinctrl-names: Must contain a "default" entry.
-- pinctrl-N: One property must exist for each entry in
-	     pinctrl-names. See ../pinctrl/pinctrl-bindings.txt
-	     for details of the property values.
-
-Optional properties:
-- rockchip,path-map: This is a variable length array, that shows the mapping
-  of SDIx to PATHx. By default, they are one-to-one mapping as follows:
-
-   path0 <-- sdi0
-   path1 <-- sdi1
-   path2 <-- sdi2
-   path3 <-- sdi3
-
-  e.g. "rockchip,path-map = <3 2 1 0>" means the mapping as follows:
-
-   path0 <-- sdi3
-   path1 <-- sdi2
-   path2 <-- sdi1
-   path3 <-- sdi0
-
-Example for rk3328 PDM controller:
-
-pdm: pdm@ff040000 {
-	compatible = "rockchip,pdm";
-	reg = <0x0 0xff040000 0x0 0x1000>;
-	clocks = <&clk_pdm>, <&clk_gates28 0>;
-	clock-names = "pdm_clk", "pdm_hclk";
-	dmas = <&pdma 16>;
-	#dma-cells = <1>;
-	dma-names = "rx";
-	pinctrl-names = "default", "sleep";
-	pinctrl-0 = <&pdmm0_clk
-		     &pdmm0_sdi0
-		     &pdmm0_sdi1
-		     &pdmm0_sdi2
-		     &pdmm0_sdi3>;
-	pinctrl-1 = <&pdmm0_clk_sleep
-		     &pdmm0_sdi0_sleep
-		     &pdmm0_sdi1_sleep
-		     &pdmm0_sdi2_sleep
-		     &pdmm0_sdi3_sleep>;
-};
diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.yaml b/Documentation/devicetree/bindings/sound/rockchip,pdm.yaml
new file mode 100644
index 0000000..22e1cf6
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/rockchip,pdm.yaml
@@ -0,0 +1,120 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/rockchip,pdm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip PDM controller
+
+description:
+  The Pulse Density Modulation Interface Controller (PDMC) is
+  a PDM interface controller and decoder that support PDM format.
+  It integrates a clock generator driving the PDM microphone
+  and embeds filters which decimate the incoming bit stream to
+  obtain most common audio rates.
+
+maintainers:
+  - Heiko Stuebner <heiko@sntech.de>
+
+properties:
+  compatible:
+    enum:
+      - rockchip,pdm
+      - rockchip,px30-pdm
+      - rockchip,rk1808-pdm
+      - rockchip,rk3308-pdm
+      - rockchip,rk3568-pdm
+      - rockchip,rv1126-pdm
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: clock for PDM controller
+      - description: clock for PDM BUS
+
+  clock-names:
+    items:
+      - const: pdm_clk
+      - const: pdm_hclk
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    items:
+      - const: rx
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    items:
+      - description: reset for PDM controller
+
+  reset-names:
+    items:
+      - const: pdm-m
+
+  rockchip,path-map:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      Defines the mapping of PDM SDIx to PDM PATHx.
+      By default, they are mapped one-to-one.
+    maxItems: 4
+    uniqueItems: true
+    items:
+      enum: [ 0, 1, 2, 3 ]
+
+  "#sound-dai-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - dmas
+  - dma-names
+  - "#sound-dai-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3328-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/pinctrl/rockchip.h>
+
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pdm@ff040000 {
+            compatible = "rockchip,pdm";
+            reg = <0x0 0xff040000 0x0 0x1000>;
+            interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&cru SCLK_PDM>, <&cru HCLK_PDM>;
+            clock-names = "pdm_clk", "pdm_hclk";
+            dmas = <&dmac 16>;
+            dma-names = "rx";
+            #sound-dai-cells = <0>;
+            pinctrl-names = "default", "sleep";
+            pinctrl-0 = <&pdmm0_clk
+                         &pdmm0_sdi0
+                         &pdmm0_sdi1
+                         &pdmm0_sdi2
+                         &pdmm0_sdi3>;
+            pinctrl-1 = <&pdmm0_clk_sleep
+                         &pdmm0_sdi0_sleep
+                         &pdmm0_sdi1_sleep
+                         &pdmm0_sdi2_sleep
+                         &pdmm0_sdi3_sleep>;
+        };
+    };
-- 
2.7.4

Re: [PATCH v3 7/7] ASoC: dt-bindings: rockchip: Convert pdm bindings to yaml

[Rob Herring]

On Wed, 01 Sep 2021 11:48:38 +0800, Sugar Zhang wrote:
> This patch converts pdm bindings to yaml.
> 
> Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
> ---
> 
> Changes in v3:
> - Fix property 'path-map' suggested by Rob Herring.
> 
> Changes in v2:
> - Fix yamllint errors.
> 
>  .../devicetree/bindings/sound/rockchip,pdm.txt     |  64 -----------
>  .../devicetree/bindings/sound/rockchip,pdm.yaml    | 120 +++++++++++++++++++++
>  2 files changed, 120 insertions(+), 64 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/sound/rockchip,pdm.txt
>  create mode 100644 Documentation/devicetree/bindings/sound/rockchip,pdm.yaml
> 

Reviewed-by: Rob Herring <robh@kernel.org>