* [PATCH 0/3] Add mclk0 clock source for SAI
@ 2019-05-28 13:20 Daniel Baluta
2019-05-28 13:21 ` [PATCH 1/3] ARM: dts: imx: Add mclk0 clock " Daniel Baluta
` (3 more replies)
0 siblings, 4 replies; 8+ messages in thread
From: Daniel Baluta @ 2019-05-28 13:20 UTC (permalink / raw)
To: robh+dt, shawnguo, timur, nicoleotsuka, broonie
Cc: mark.rutland, devicetree, alsa-devel, Xiubo.Lee, Daniel Baluta,
s.hauer, tiwai, linux-kernel, lgirdwood, dl-linux-imx, kernel,
festevam, linux-arm-kernel
This patch series brings together patches [1] and [2] which
introduce mclk0 clock source via DT.
mclk0..3 are the four clock sources options
of SAI's clock MUX.
mclk0 option selects:
- Bus Clock on i.MX8
- MCLK1 on i.MX6/7
Finally we also update the DT binding information for SAI clocks.
In [1] and [2] Nicolin had a very good point on the fact that
mclk0 might not be needed in the DT. Anyhow, there are two reasons
for which I think mlck0 should be added to DT:
1) SAI clock source select MUX is really part of the hardware
2) flexibility! We let DT tell us which is the option for MUX
option 0.
[1] lkml.org/lkml/2019/4/20/141
[2] lkml.org/lkml/2019/4/20/56
Daniel Baluta (2):
dt-bindings: sound: Clarify the usage of clocks in SAI
ASoC: fsl_sai: Read SAI clock source 0 from DT
Shengjiu Wang (1):
ARM: dts: imx: Add mclk0 clock for SAI
Documentation/devicetree/bindings/sound/fsl-sai.txt | 5 +++--
arch/arm/boot/dts/imx6sx.dtsi | 6 ++++--
arch/arm/boot/dts/imx6ul.dtsi | 9 ++++++---
arch/arm/boot/dts/imx7s.dtsi | 9 ++++++---
sound/soc/fsl/fsl_sai.c | 3 +--
5 files changed, 20 insertions(+), 12 deletions(-)
--
2.17.1
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^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 1/3] ARM: dts: imx: Add mclk0 clock for SAI
2019-05-28 13:20 [PATCH 0/3] Add mclk0 clock source for SAI Daniel Baluta
@ 2019-05-28 13:21 ` Daniel Baluta
2019-05-29 22:57 ` Nicolin Chen
2019-05-28 13:21 ` [PATCH 2/3] dt-bindings: sound: Clarify the usage of clocks in SAI Daniel Baluta
` (2 subsequent siblings)
3 siblings, 1 reply; 8+ messages in thread
From: Daniel Baluta @ 2019-05-28 13:21 UTC (permalink / raw)
To: robh+dt, shawnguo, timur, nicoleotsuka, broonie
Cc: mark.rutland, devicetree, alsa-devel, Xiubo.Lee, Daniel Baluta,
s.hauer, tiwai, linux-kernel, lgirdwood, dl-linux-imx, kernel,
festevam, S.j. Wang, linux-arm-kernel
From: Shengjiu Wang <shengjiu.wang@nxp.com>
Audio MCLK source option is selected with a 4:1 MUX
controller using MCLK Select bits in SAI xCR2 register.
On imx6/7 mclk0 and mclk1 always point to the same clock
source. Anyhow, this is no longer true for imx8.
For this reason, we need to add mclk0 and handle it
in a generic way in SAI driver.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
arch/arm/boot/dts/imx6sx.dtsi | 6 ++++--
arch/arm/boot/dts/imx6ul.dtsi | 9 ++++++---
arch/arm/boot/dts/imx7s.dtsi | 9 ++++++---
3 files changed, 16 insertions(+), 8 deletions(-)
diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
index b16a123990a2..682207b5d868 100644
--- a/arch/arm/boot/dts/imx6sx.dtsi
+++ b/arch/arm/boot/dts/imx6sx.dtsi
@@ -1071,9 +1071,10 @@
reg = <0x021d4000 0x4000>;
interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6SX_CLK_SAI1_IPG>,
+ <&clks IMX6SX_CLK_SAI1>,
<&clks IMX6SX_CLK_SAI1>,
<&clks 0>, <&clks 0>;
- clock-names = "bus", "mclk1", "mclk2", "mclk3";
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
dma-names = "rx", "tx";
dmas = <&sdma 31 24 0>, <&sdma 32 24 0>;
status = "disabled";
@@ -1090,9 +1091,10 @@
reg = <0x021dc000 0x4000>;
interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6SX_CLK_SAI2_IPG>,
+ <&clks IMX6SX_CLK_SAI2>,
<&clks IMX6SX_CLK_SAI2>,
<&clks 0>, <&clks 0>;
- clock-names = "bus", "mclk1", "mclk2", "mclk3";
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
dma-names = "rx", "tx";
dmas = <&sdma 33 24 0>, <&sdma 34 24 0>;
status = "disabled";
diff --git a/arch/arm/boot/dts/imx6ul.dtsi b/arch/arm/boot/dts/imx6ul.dtsi
index bbf010c73336..e9691306f557 100644
--- a/arch/arm/boot/dts/imx6ul.dtsi
+++ b/arch/arm/boot/dts/imx6ul.dtsi
@@ -304,9 +304,10 @@
reg = <0x02028000 0x4000>;
interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_SAI1_IPG>,
+ <&clks IMX6UL_CLK_SAI1>,
<&clks IMX6UL_CLK_SAI1>,
<&clks IMX6UL_CLK_DUMMY>, <&clks IMX6UL_CLK_DUMMY>;
- clock-names = "bus", "mclk1", "mclk2", "mclk3";
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
dmas = <&sdma 35 24 0>,
<&sdma 36 24 0>;
dma-names = "rx", "tx";
@@ -319,9 +320,10 @@
reg = <0x0202c000 0x4000>;
interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_SAI2_IPG>,
+ <&clks IMX6UL_CLK_SAI2>,
<&clks IMX6UL_CLK_SAI2>,
<&clks IMX6UL_CLK_DUMMY>, <&clks IMX6UL_CLK_DUMMY>;
- clock-names = "bus", "mclk1", "mclk2", "mclk3";
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
dmas = <&sdma 37 24 0>,
<&sdma 38 24 0>;
dma-names = "rx", "tx";
@@ -334,9 +336,10 @@
reg = <0x02030000 0x4000>;
interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6UL_CLK_SAI3_IPG>,
+ <&clks IMX6UL_CLK_SAI3>,
<&clks IMX6UL_CLK_SAI3>,
<&clks IMX6UL_CLK_DUMMY>, <&clks IMX6UL_CLK_DUMMY>;
- clock-names = "bus", "mclk1", "mclk2", "mclk3";
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
dmas = <&sdma 39 24 0>,
<&sdma 40 24 0>;
dma-names = "rx", "tx";
diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
index 106711d2c01b..c345a2e6d824 100644
--- a/arch/arm/boot/dts/imx7s.dtsi
+++ b/arch/arm/boot/dts/imx7s.dtsi
@@ -886,10 +886,11 @@
reg = <0x308a0000 0x10000>;
interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX7D_SAI1_IPG_CLK>,
+ <&clks IMX7D_SAI1_ROOT_CLK>,
<&clks IMX7D_SAI1_ROOT_CLK>,
<&clks IMX7D_CLK_DUMMY>,
<&clks IMX7D_CLK_DUMMY>;
- clock-names = "bus", "mclk1", "mclk2", "mclk3";
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
dma-names = "rx", "tx";
dmas = <&sdma 8 24 0>, <&sdma 9 24 0>;
status = "disabled";
@@ -901,10 +902,11 @@
reg = <0x308b0000 0x10000>;
interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX7D_SAI2_IPG_CLK>,
+ <&clks IMX7D_SAI2_ROOT_CLK>,
<&clks IMX7D_SAI2_ROOT_CLK>,
<&clks IMX7D_CLK_DUMMY>,
<&clks IMX7D_CLK_DUMMY>;
- clock-names = "bus", "mclk1", "mclk2", "mclk3";
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
dma-names = "rx", "tx";
dmas = <&sdma 10 24 0>, <&sdma 11 24 0>;
status = "disabled";
@@ -916,10 +918,11 @@
reg = <0x308c0000 0x10000>;
interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX7D_SAI3_IPG_CLK>,
+ <&clks IMX7D_SAI3_ROOT_CLK>,
<&clks IMX7D_SAI3_ROOT_CLK>,
<&clks IMX7D_CLK_DUMMY>,
<&clks IMX7D_CLK_DUMMY>;
- clock-names = "bus", "mclk1", "mclk2", "mclk3";
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
dma-names = "rx", "tx";
dmas = <&sdma 12 24 0>, <&sdma 13 24 0>;
status = "disabled";
--
2.17.1
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/3] dt-bindings: sound: Clarify the usage of clocks in SAI
2019-05-28 13:20 [PATCH 0/3] Add mclk0 clock source for SAI Daniel Baluta
2019-05-28 13:21 ` [PATCH 1/3] ARM: dts: imx: Add mclk0 clock " Daniel Baluta
@ 2019-05-28 13:21 ` Daniel Baluta
2019-06-14 20:00 ` Rob Herring
2019-05-28 13:21 ` [PATCH 3/3] ASoC: fsl_sai: Read SAI clock source 0 from DT Daniel Baluta
2019-05-29 23:03 ` [PATCH 0/3] Add mclk0 clock source for SAI Nicolin Chen
3 siblings, 1 reply; 8+ messages in thread
From: Daniel Baluta @ 2019-05-28 13:21 UTC (permalink / raw)
To: robh+dt, shawnguo, timur, nicoleotsuka, broonie
Cc: mark.rutland, devicetree, alsa-devel, Xiubo.Lee, Daniel Baluta,
s.hauer, tiwai, linux-kernel, lgirdwood, dl-linux-imx, kernel,
festevam, linux-arm-kernel
SAI might have up to 4 clock sources selected by an internal
CLK mux.
On imx6/7 mclk0/mclk1 are the same, while on imx8 mclk0 and
mclk1 are coming from different sources.
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
Documentation/devicetree/bindings/sound/fsl-sai.txt | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
index 2e726b983845..db0497d1920a 100644
--- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
+++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
@@ -15,8 +15,9 @@ Required properties:
- clocks : Must contain an entry for each entry in clock-names.
- clock-names : Must include the "bus" for register access and
- "mclk1", "mclk2", "mclk3" for bit clock and frame
- clock providing.
+ "mclk0", "mclk1", "mclk2", "mclk3" the four clock
+ sources of the SAI clock MUX selecting a clock
+ for bit clock and frame clock providing.
- dmas : Generic dma devicetree binding as described in
Documentation/devicetree/bindings/dma/dma.txt.
--
2.17.1
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 3/3] ASoC: fsl_sai: Read SAI clock source 0 from DT
2019-05-28 13:20 [PATCH 0/3] Add mclk0 clock source for SAI Daniel Baluta
2019-05-28 13:21 ` [PATCH 1/3] ARM: dts: imx: Add mclk0 clock " Daniel Baluta
2019-05-28 13:21 ` [PATCH 2/3] dt-bindings: sound: Clarify the usage of clocks in SAI Daniel Baluta
@ 2019-05-28 13:21 ` Daniel Baluta
2019-05-29 23:03 ` [PATCH 0/3] Add mclk0 clock source for SAI Nicolin Chen
3 siblings, 0 replies; 8+ messages in thread
From: Daniel Baluta @ 2019-05-28 13:21 UTC (permalink / raw)
To: robh+dt, shawnguo, timur, nicoleotsuka, broonie
Cc: mark.rutland, devicetree, alsa-devel, Xiubo.Lee, Daniel Baluta,
s.hauer, tiwai, linux-kernel, lgirdwood, dl-linux-imx, kernel,
festevam, S.j. Wang, linux-arm-kernel
SAI provide multiple master clock source options selectable
via bit MSEL of TCR2/RCR2.
All possible master clock sources are stored in sai->mclk_clk
array. Current implementation assumes that MCLK0 source is always
busclk, but this is wrong!
For example, on i.MX8QM we have:
00b - Bus Clock selected.
01b - Master Clock (MCLK) 1 option selected.
10b - Master Clock (MCLK) 2 option selected.
11b - Master Clock (MCLK) 3 option selected.
while on i.MX6SX we have:
00b - Master Clock (MCLK) 1 option selected.
01b - Master Clock (MCLK) 1 option selected.
10b - Master Clock (MCLK) 2 option selected.
11b - Master Clock (MCLK) 3 option selected.
So, this patch will read mclk0 source clock from device tree.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
---
sound/soc/fsl/fsl_sai.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index db9e0872f73d..b563004fb89f 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -826,8 +826,7 @@ static int fsl_sai_probe(struct platform_device *pdev)
sai->bus_clk = NULL;
}
- sai->mclk_clk[0] = sai->bus_clk;
- for (i = 1; i < FSL_SAI_MCLK_MAX; i++) {
+ for (i = 0; i < FSL_SAI_MCLK_MAX; i++) {
sprintf(tmp, "mclk%d", i);
sai->mclk_clk[i] = devm_clk_get(&pdev->dev, tmp);
if (IS_ERR(sai->mclk_clk[i])) {
--
2.17.1
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 1/3] ARM: dts: imx: Add mclk0 clock for SAI
2019-05-28 13:21 ` [PATCH 1/3] ARM: dts: imx: Add mclk0 clock " Daniel Baluta
@ 2019-05-29 22:57 ` Nicolin Chen
0 siblings, 0 replies; 8+ messages in thread
From: Nicolin Chen @ 2019-05-29 22:57 UTC (permalink / raw)
To: Daniel Baluta
Cc: mark.rutland, devicetree, alsa-devel, timur, Xiubo.Lee, festevam,
s.hauer, tiwai, linux-kernel, robh+dt, lgirdwood, broonie,
dl-linux-imx, kernel, shawnguo, S.j. Wang, linux-arm-kernel
On Tue, May 28, 2019 at 01:21:00PM +0000, Daniel Baluta wrote:
> From: Shengjiu Wang <shengjiu.wang@nxp.com>
>
> Audio MCLK source option is selected with a 4:1 MUX
> controller using MCLK Select bits in SAI xCR2 register.
>
> On imx6/7 mclk0 and mclk1 always point to the same clock
> source. Anyhow, this is no longer true for imx8.
>
> For this reason, we need to add mclk0 and handle it
> in a generic way in SAI driver.
>
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
> Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
> ---
> arch/arm/boot/dts/imx6sx.dtsi | 6 ++++--
> arch/arm/boot/dts/imx6ul.dtsi | 9 ++++++---
> arch/arm/boot/dts/imx7s.dtsi | 9 ++++++---
These are dtsi/dts files that have SAI missing mclk0:
arch/arm/boot/dts/imx6ul.dtsi
arch/arm/boot/dts/imx6sx.dtsi
arch/arm/boot/dts/ls1021a.dtsi
arch/arm/boot/dts/imx7s.dtsi
arch/arm/boot/dts/vfxxx.dtsi
arch/arm64/boot/dts/freescale/imx8mq.dtsi
arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
arch/arm64/boot/dts/freescale/fsl-ls1012a.dtsi
arch/arm64/boot/dts/freescale/fsl-ls1012a.dtsi
Would it be possible for you to update the others also?
Thanks
Nicolin
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 0/3] Add mclk0 clock source for SAI
2019-05-28 13:20 [PATCH 0/3] Add mclk0 clock source for SAI Daniel Baluta
` (2 preceding siblings ...)
2019-05-28 13:21 ` [PATCH 3/3] ASoC: fsl_sai: Read SAI clock source 0 from DT Daniel Baluta
@ 2019-05-29 23:03 ` Nicolin Chen
2019-05-30 8:32 ` Daniel Baluta
3 siblings, 1 reply; 8+ messages in thread
From: Nicolin Chen @ 2019-05-29 23:03 UTC (permalink / raw)
To: Daniel Baluta
Cc: mark.rutland, devicetree, alsa-devel, timur, Xiubo.Lee, festevam,
s.hauer, tiwai, linux-kernel, robh+dt, lgirdwood, broonie,
dl-linux-imx, kernel, shawnguo, linux-arm-kernel
On Tue, May 28, 2019 at 01:20:46PM +0000, Daniel Baluta wrote:
> 1) SAI clock source select MUX is really part of the hardware
> 2) flexibility! We let DT tell us which is the option for MUX
> option 0.
I think the "MUX" is plausible comparing to your previous version.
As long as DT maintainers ack the DT binding doc, I would be okay
to ack too. Just one comments at the dts/dtsi changes, I know the
driver would just warn old DTs, but it does change the behavior at
the mclk_clk[0] from previously bus_clk to NULL after this series.
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 0/3] Add mclk0 clock source for SAI
2019-05-29 23:03 ` [PATCH 0/3] Add mclk0 clock source for SAI Nicolin Chen
@ 2019-05-30 8:32 ` Daniel Baluta
0 siblings, 0 replies; 8+ messages in thread
From: Daniel Baluta @ 2019-05-30 8:32 UTC (permalink / raw)
To: nicoleotsuka
Cc: mark.rutland, devicetree, alsa-devel, lgirdwood, timur,
Xiubo.Lee, shawnguo, broonie, linux-kernel, tiwai, robh+dt,
dl-linux-imx, kernel, festevam, s.hauer, linux-arm-kernel
On Wed, 2019-05-29 at 16:03 -0700, Nicolin Chen wrote:
> On Tue, May 28, 2019 at 01:20:46PM +0000, Daniel Baluta wrote:
>
> > 1) SAI clock source select MUX is really part of the hardware
> > 2) flexibility! We let DT tell us which is the option for MUX
> > option 0.
>
> I think the "MUX" is plausible comparing to your previous version.
> As long as DT maintainers ack the DT binding doc, I would be okay
> to ack too. Just one comments at the dts/dtsi changes, I know the
> driver would just warn old DTs, but it does change the behavior at
> the mclk_clk[0] from previously bus_clk to NULL after this series.
Thanks for review, will fix in v2.
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/3] dt-bindings: sound: Clarify the usage of clocks in SAI
2019-05-28 13:21 ` [PATCH 2/3] dt-bindings: sound: Clarify the usage of clocks in SAI Daniel Baluta
@ 2019-06-14 20:00 ` Rob Herring
0 siblings, 0 replies; 8+ messages in thread
From: Rob Herring @ 2019-06-14 20:00 UTC (permalink / raw)
To: Daniel Baluta
Cc: mark.rutland, devicetree, alsa-devel, Daniel Baluta, timur,
Xiubo.Lee, festevam, s.hauer, tiwai, linux-kernel, robh+dt,
lgirdwood, nicoleotsuka, broonie, dl-linux-imx, kernel, shawnguo,
linux-arm-kernel
On Tue, 28 May 2019 13:21:01 +0000, Daniel Baluta wrote:
> SAI might have up to 4 clock sources selected by an internal
> CLK mux.
>
> On imx6/7 mclk0/mclk1 are the same, while on imx8 mclk0 and
> mclk1 are coming from different sources.
>
> Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
> ---
> Documentation/devicetree/bindings/sound/fsl-sai.txt | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
Reviewed-by: Rob Herring <robh@kernel.org>
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^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2019-06-14 20:01 UTC | newest]
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2019-05-28 13:20 [PATCH 0/3] Add mclk0 clock source for SAI Daniel Baluta
2019-05-28 13:21 ` [PATCH 1/3] ARM: dts: imx: Add mclk0 clock " Daniel Baluta
2019-05-29 22:57 ` Nicolin Chen
2019-05-28 13:21 ` [PATCH 2/3] dt-bindings: sound: Clarify the usage of clocks in SAI Daniel Baluta
2019-06-14 20:00 ` Rob Herring
2019-05-28 13:21 ` [PATCH 3/3] ASoC: fsl_sai: Read SAI clock source 0 from DT Daniel Baluta
2019-05-29 23:03 ` [PATCH 0/3] Add mclk0 clock source for SAI Nicolin Chen
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