[RESEND PATCH v3 0/2] Enable wm8524 codec on i.MX8MM EVK

[RESEND PATCH v3 0/2] Enable wm8524 codec on i.MX8MM EVK

[Daniel Baluta]

This patch series introduces the SAI nodes on i.MX8MM EVK then
creates the wm8524 codec node and finally uses simple card machine
driver to create a sound card.

Changes since v2:
       - place compatible strings one a single lines
       - move GPIO pinctrl in a node of its own
       - remove codec phandle

Changes since v1:
        - use "fsl,imx8mm-sai", "fsl,imx8mq-sai" compatbile strings and
          remove "fsl,imx6sx-sai" because SAI module on i.MX8M is not
          compatbile with SAI modules form i.MX6

RESEND to fix email encoding.

Daniel Baluta (2):
  arm64: dts: imx8mm: Add SAI nodes
  arm64: dts: imx8mm-evk: Enable audio codec wm8524

 arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 55 ++++++++++++++++
 arch/arm64/boot/dts/freescale/imx8mm.dtsi    | 66 ++++++++++++++++++++
 2 files changed, 121 insertions(+)

-- 
2.17.1

[PATCH v3 1/2] arm64: dts: imx8mm: Add SAI nodes

[Daniel Baluta]

i.MX8MM has 5 SAI instances with the following base
addresses according to RM.

SAI1 base address: 3001_0000h
SAI2 base address: 3002_0000h
SAI3 base address: 3003_0000h
SAI5 base address: 3005_0000h
SAI6 base address: 3006_0000h

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 66 +++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index 6b407a94c06e..52abe2d03f31 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -201,6 +201,72 @@
 			#size-cells = <1>;
 			ranges;
 
+			sai1: sai@30010000 {
+				compatible = "fsl,imx8mm-sai", "fsl,imx8mq-sai";
+				reg = <0x30010000 0x10000>;
+				interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clk IMX8MM_CLK_SAI1_IPG>,
+					 <&clk IMX8MM_CLK_SAI1_ROOT>,
+					 <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>;
+				clock-names = "bus", "mclk1", "mclk2", "mclk3";
+				dmas = <&sdma2 0 2 0>, <&sdma2 1 2 0>;
+				dma-names = "rx", "tx";
+				status = "disabled";
+			};
+
+			sai2: sai@30020000 {
+				compatible = "fsl,imx8mm-sai", "fsl,imx8mq-sai";
+				reg = <0x30020000 0x10000>;
+				interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clk IMX8MM_CLK_SAI2_IPG>,
+					<&clk IMX8MM_CLK_SAI2_ROOT>,
+					<&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>;
+				clock-names = "bus", "mclk1", "mclk2", "mclk3";
+				dmas = <&sdma2 2 2 0>, <&sdma2 3 2 0>;
+				dma-names = "rx", "tx";
+				status = "disabled";
+			};
+
+			sai3: sai@30030000 {
+				#sound-dai-cells = <0>;
+				compatible = "fsl,imx8mm-sai", "fsl,imx8mq-sai";
+				reg = <0x30030000 0x10000>;
+				interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clk IMX8MM_CLK_SAI3_IPG>,
+					 <&clk IMX8MM_CLK_SAI3_ROOT>,
+					 <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>;
+				clock-names = "bus", "mclk1", "mclk2", "mclk3";
+				dmas = <&sdma2 4 2 0>, <&sdma2 5 2 0>;
+				dma-names = "rx", "tx";
+				status = "disabled";
+			};
+
+			sai5: sai@30050000 {
+				compatible = "fsl,imx8mm-sai", "fsl,imx8mq-sai";
+				reg = <0x30050000 0x10000>;
+				interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clk IMX8MM_CLK_SAI5_IPG>,
+					 <&clk IMX8MM_CLK_SAI5_ROOT>,
+					 <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>;
+				clock-names = "bus", "mclk1", "mclk2", "mclk3";
+				dmas = <&sdma2 8 2 0>, <&sdma2 9 2 0>;
+				dma-names = "rx", "tx";
+				status = "disabled";
+			};
+
+			sai6: sai@30060000 {
+				compatible = "fsl,imx8mm-sai", "fsl,imx8mq-sai";
+				reg = <0x30060000 0x10000>;
+				interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clk IMX8MM_CLK_SAI6_IPG>,
+					 <&clk IMX8MM_CLK_SAI6_ROOT>,
+					 <&clk IMX8MM_CLK_DUMMY>, <&clk IMX8MM_CLK_DUMMY>;
+				clock-names = "bus", "mclk1", "mclk2", "mclk3";
+				dmas = <&sdma2 10 2 0>, <&sdma2 11 2 0>;
+				dma-names = "rx", "tx";
+				status = "disabled";
+			};
+
 			gpio1: gpio@30200000 {
 				compatible = "fsl,imx8mm-gpio", "fsl,imx35-gpio";
 				reg = <0x30200000 0x10000>;
-- 
2.17.1

[PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Daniel Baluta]

i.MX8MM has one wm8524 audio codec connected with
SAI3 digital audio interface.

This patch uses simple-card machine driver in order
to enable wm8524 codec.

We need to set:
	* SAI3 pinctrl configuration
	* codec reset gpio pinctrl configuration
	* clock hierarchy
	* codec node
	* simple-card configuration

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 55 ++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
index 2d5d89475b76..7c578d8762b9 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
@@ -37,6 +37,37 @@
 		gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
+
+	wm8524: audio-codec {
+		#sound-dai-cells = <0>;
+		compatible = "wlf,wm8524";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_wlf>;
+		wlf,mute-gpios = <&gpio5 21 GPIO_ACTIVE_LOW>;
+	};
+
+	sound-wm8524 {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "wm8524-audio";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,frame-master = <&cpudai>;
+		simple-audio-card,bitclock-master = <&cpudai>;
+		simple-audio-card,widgets =
+			"Line", "Left Line Out Jack",
+			"Line", "Right Line Out Jack";
+		simple-audio-card,routing =
+			"Left Line Out Jack", "LINEVOUTL",
+			"Right Line Out Jack", "LINEVOUTR";
+
+		cpudai: simple-audio-card,cpu {
+			sound-dai = <&sai3>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&wm8524>;
+			clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
+		};
+	};
 };
 
 &fec1 {
@@ -61,6 +92,15 @@
 	};
 };
 
+&sai3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_sai3>;
+	assigned-clocks = <&clk IMX8MM_CLK_SAI3>;
+	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <24576000>;
+	status = "okay";
+};
+
 &uart2 { /* console */
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart2>;
@@ -124,12 +164,27 @@
 		>;
 	};
 
+	pinctrl_gpio_wlf: gpiowlfgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_I2C4_SDA_GPIO5_IO21        0xd6
+		>;
+	};
+
 	pinctrl_reg_usdhc2_vmmc: regusdhc2vmmc {
 		fsl,pins = <
 			MX8MM_IOMUXC_SD2_RESET_B_GPIO2_IO19	0x41
 		>;
 	};
 
+	pinctrl_sai3: sai3grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI3_TXFS_SAI3_TX_SYNC     0xd6
+			MX8MM_IOMUXC_SAI3_TXC_SAI3_TX_BCLK      0xd6
+			MX8MM_IOMUXC_SAI3_MCLK_SAI3_MCLK        0xd6
+			MX8MM_IOMUXC_SAI3_TXD_SAI3_TX_DATA0     0xd6
+		>;
+	};
+
 	pinctrl_uart2: uart2grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX	0x140
-- 
2.17.1

Re: [PATCH v3 1/2] arm64: dts: imx8mm: Add SAI nodes

[Fabio Estevam]

Hi Daniel,

On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@nxp.com> wrote:
>
> i.MX8MM has 5 SAI instances with the following base
> addresses according to RM.
>
> SAI1 base address: 3001_0000h
> SAI2 base address: 3002_0000h
> SAI3 base address: 3003_0000h
> SAI5 base address: 3005_0000h
> SAI6 base address: 3006_0000h

No SAI4?

I know the RM does not show the SAI4 in the memory map, but the clock
driver does show a SAI4 clock gate.

So it seems we have a contradiction in the reference manual. Could you
please double check with the internal folks?

Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Fabio Estevam]

On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@nxp.com> wrote:

> +               simple-audio-card,codec {
> +                       sound-dai = <&wm8524>;
> +                       clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;

IMX8MM_CLK_SAI3_ROOT is the internal clock that drives the SAI3
interface, not an external clock that feeds the codec.

It seems you should remove this 'clocks' entry.

Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Daniel Baluta]

<reduce audience to linux-imx>

Shengjiu,

Can you help me with this? Specifically: I couldn't find the schematic
showing the
exact connection pins between SAI and wm8524 codec.

I looked into our internal tree and the wm8524 codec always handles
CLK_SAIX_ROOT
but Fabio has a good point. This clock doesn't feeds the codec.

Unless, we can really look into the schematics and prove it otherwise.

On Thu, May 16, 2019 at 10:14 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@nxp.com> wrote:
>
> > +               simple-audio-card,codec {
> > +                       sound-dai = <&wm8524>;
> > +                       clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
>
> IMX8MM_CLK_SAI3_ROOT is the internal clock that drives the SAI3
> interface, not an external clock that feeds the codec.
>
> It seems you should remove this 'clocks' entry.

Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Fabio Estevam]

On Thu, May 16, 2019 at 3:35 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@nxp.com> wrote:
>
> > +               simple-audio-card,codec {
> > +                       sound-dai = <&wm8524>;
> > +                       clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
>
> IMX8MM_CLK_SAI3_ROOT is the internal clock that drives the SAI3
> interface, not an external clock that feeds the codec.
>
> It seems you should remove this 'clocks' entry.

Just checked the schematics and the SAI3_MCLK pin clocks the codec, so
the representation is correct:

Reviewed-by: Fabio Estevam <festevam@gmail.com>

Re: [PATCH v3 1/2] arm64: dts: imx8mm: Add SAI nodes

[Fabio Estevam]

On Thu, May 16, 2019 at 3:33 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> Hi Daniel,
>
> On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@nxp.com> wrote:
> >
> > i.MX8MM has 5 SAI instances with the following base
> > addresses according to RM.
> >
> > SAI1 base address: 3001_0000h
> > SAI2 base address: 3002_0000h
> > SAI3 base address: 3003_0000h
> > SAI5 base address: 3005_0000h
> > SAI6 base address: 3006_0000h
>
> No SAI4?
>
> I know the RM does not show the SAI4 in the memory map, but the clock
> driver does show a SAI4 clock gate.
>
> So it seems we have a contradiction in the reference manual. Could you
> please double check with the internal folks?

Despite the SAI4 confusion, the current patch correctly describe the
SAI interfaces as per the Reference Manual, so:

Reviewed-by: Fabio Estevam <festevam@gmail.com>

Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Fabio Estevam]

On Mon, May 20, 2019 at 7:12 AM Daniel Baluta <daniel.baluta@gmail.com> wrote:
>
> <reduce audience to linux-imx>
>
> Shengjiu,
>
> Can you help me with this? Specifically: I couldn't find the schematic
> showing the
> exact connection pins between SAI and wm8524 codec.
>
> I looked into our internal tree and the wm8524 codec always handles
> CLK_SAIX_ROOT
> but Fabio has a good point. This clock doesn't feeds the codec.
>
> Unless, we can really look into the schematics and prove it otherwise.

Yes, I just checked and the devicetree patch is correct. Sorry for the
confusion.

Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Daniel Baluta]

On Mon, May 20, 2019 at 10:33 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> On Thu, May 16, 2019 at 3:35 PM Fabio Estevam <festevam@gmail.com> wrote:
> >
> > On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@nxp.com> wrote:
> >
> > > +               simple-audio-card,codec {
> > > +                       sound-dai = <&wm8524>;
> > > +                       clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
> >
> > IMX8MM_CLK_SAI3_ROOT is the internal clock that drives the SAI3
> > interface, not an external clock that feeds the codec.
> >
> > It seems you should remove this 'clocks' entry.
>
> Just checked the schematics and the SAI3_MCLK pin clocks the codec, so
> the representation is correct:
>
> Reviewed-by: Fabio Estevam <festevam@gmail.com>

Shawn,

Can you have a look?

Re: [PATCH v3 1/2] arm64: dts: imx8mm: Add SAI nodes

[Shawn Guo]

On Wed, May 15, 2019 at 02:42:28PM +0000, Daniel Baluta wrote:
> i.MX8MM has 5 SAI instances with the following base
> addresses according to RM.
> 
> SAI1 base address: 3001_0000h
> SAI2 base address: 3002_0000h
> SAI3 base address: 3003_0000h
> SAI5 base address: 3005_0000h
> SAI6 base address: 3006_0000h
> 
> Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>

Applied, thanks.

Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Shawn Guo]

On Tue, May 28, 2019 at 10:10:43AM +0300, Daniel Baluta wrote:
> On Mon, May 20, 2019 at 10:33 PM Fabio Estevam <festevam@gmail.com> wrote:
> >
> > On Thu, May 16, 2019 at 3:35 PM Fabio Estevam <festevam@gmail.com> wrote:
> > >
> > > On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@nxp.com> wrote:
> > >
> > > > +               simple-audio-card,codec {
> > > > +                       sound-dai = <&wm8524>;
> > > > +                       clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
> > >
> > > IMX8MM_CLK_SAI3_ROOT is the internal clock that drives the SAI3
> > > interface, not an external clock that feeds the codec.
> > >
> > > It seems you should remove this 'clocks' entry.
> >
> > Just checked the schematics and the SAI3_MCLK pin clocks the codec, so
> > the representation is correct:
> >
> > Reviewed-by: Fabio Estevam <festevam@gmail.com>
> 
> Shawn,
> 
> Can you have a look?

I cannot apply this one, because there are '=20' in the patch content.

Shawn

Re: [PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Shawn Guo]

On Fri, May 31, 2019 at 03:28:33PM +0800, Shawn Guo wrote:
> On Tue, May 28, 2019 at 10:10:43AM +0300, Daniel Baluta wrote:
> > On Mon, May 20, 2019 at 10:33 PM Fabio Estevam <festevam@gmail.com> wrote:
> > >
> > > On Thu, May 16, 2019 at 3:35 PM Fabio Estevam <festevam@gmail.com> wrote:
> > > >
> > > > On Wed, May 15, 2019 at 11:42 AM Daniel Baluta <daniel.baluta@nxp.com> wrote:
> > > >
> > > > > +               simple-audio-card,codec {
> > > > > +                       sound-dai = <&wm8524>;
> > > > > +                       clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
> > > >
> > > > IMX8MM_CLK_SAI3_ROOT is the internal clock that drives the SAI3
> > > > interface, not an external clock that feeds the codec.
> > > >
> > > > It seems you should remove this 'clocks' entry.
> > >
> > > Just checked the schematics and the SAI3_MCLK pin clocks the codec, so
> > > the representation is correct:
> > >
> > > Reviewed-by: Fabio Estevam <festevam@gmail.com>
> > 
> > Shawn,
> > 
> > Can you have a look?
> 
> I cannot apply this one, because there are '=20' in the patch content.

Talk to NXP colleague Anson Huang <Anson.Huang@nxp.com> to find out how
to fix it.

https://patchwork.kernel.org/patch/10944169/#22656941

Shawn

[PATCH v3 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

[Daniel Baluta]

i.MX8MM has one wm8524 audio codec connected with
SAI3 digital audio interface.

This patch uses simple-card machine driver in order
to enable wm8524 codec.

We need to set:
	* SAI3 pinctrl configuration
	* codec reset gpio pinctrl configuration
	* clock hierarchy
	* codec node
	* simple-card configuration

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 55 ++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
index 2d5d89475b76..7c578d8762b9 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
@@ -37,6 +37,37 @@
 		gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
+
+	wm8524: audio-codec {
+		#sound-dai-cells = <0>;
+		compatible = "wlf,wm8524";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_wlf>;
+		wlf,mute-gpios = <&gpio5 21 GPIO_ACTIVE_LOW>;
+	};
+
+	sound-wm8524 {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "wm8524-audio";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,frame-master = <&cpudai>;
+		simple-audio-card,bitclock-master = <&cpudai>;
+		simple-audio-card,widgets =
+			"Line", "Left Line Out Jack",
+			"Line", "Right Line Out Jack";
+		simple-audio-card,routing =
+			"Left Line Out Jack", "LINEVOUTL",
+			"Right Line Out Jack", "LINEVOUTR";
+
+		cpudai: simple-audio-card,cpu {
+			sound-dai = <&sai3>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&wm8524>;
+			clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
+		};
+	};
 };
 
 &fec1 {
@@ -61,6 +92,15 @@
 	};
 };
 
+&sai3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_sai3>;
+	assigned-clocks = <&clk IMX8MM_CLK_SAI3>;
+	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <24576000>;
+	status = "okay";
+};
+
 &uart2 { /* console */
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart2>;
@@ -124,12 +164,27 @@
 		>;
 	};
 
+	pinctrl_gpio_wlf: gpiowlfgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_I2C4_SDA_GPIO5_IO21        0xd6
+		>;
+	};
+
 	pinctrl_reg_usdhc2_vmmc: regusdhc2vmmc {
 		fsl,pins = <
 			MX8MM_IOMUXC_SD2_RESET_B_GPIO2_IO19	0x41
 		>;
 	};
 
+	pinctrl_sai3: sai3grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI3_TXFS_SAI3_TX_SYNC     0xd6
+			MX8MM_IOMUXC_SAI3_TXC_SAI3_TX_BCLK      0xd6
+			MX8MM_IOMUXC_SAI3_MCLK_SAI3_MCLK        0xd6
+			MX8MM_IOMUXC_SAI3_TXD_SAI3_TX_DATA0     0xd6
+		>;
+	};
+
 	pinctrl_uart2: uart2grp {
 		fsl,pins = <
 			MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX	0x140
-- 
2.17.1