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| Started by | Andrey Smirnov <andrew.smirnov@gmail.com> |
|---|---|
| First post | 2017-04-13 15:40 +0200 |
| Last post | 2017-04-14 18:10 +0200 |
| Articles | 6 — 4 participants |
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[PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node Andrey Smirnov <andrew.smirnov@gmail.com> - 2017-04-13 15:40 +0200
Re: [PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node Fabio Estevam <festevam@gmail.com> - 2017-04-14 00:30 +0200
Re: [PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node Andrey Smirnov <andrew.smirnov@gmail.com> - 2017-04-14 17:30 +0200
Re: [PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node Shawn Guo <shawnguo@kernel.org> - 2017-04-14 05:50 +0200
Re: [PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node Andrey Smirnov <andrew.smirnov@gmail.com> - 2017-04-14 17:40 +0200
Re: [PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node Dong Aisheng <dongas86@gmail.com> - 2017-04-14 18:10 +0200
| From | Andrey Smirnov <andrew.smirnov@gmail.com> |
|---|---|
| Date | 2017-04-13 15:40 +0200 |
| Subject | [PATCH 6/8] ARM: dts: imx7d-sdb: Add GPIO expander node |
| Message-ID | <tvN8B-3CF-9@gated-at.bofh.it> |
Add node for U38, a 74LV595PW serial-in shift register that acts as a
GPIO expander on the board.
Cc: yurovsky@gmail.com
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
arch/arm/boot/dts/imx7d-sdb.dts | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
index 5be01a1..e0ff276 100644
--- a/arch/arm/boot/dts/imx7d-sdb.dts
+++ b/arch/arm/boot/dts/imx7d-sdb.dts
@@ -52,6 +52,30 @@
reg = <0x80000000 0x80000000>;
};
+ spi4 {
+ compatible = "spi-gpio";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_spi1>;
+ status = "okay";
+ gpio-sck = <&gpio1 13 0>;
+ gpio-mosi = <&gpio1 9 0>;
+ cs-gpios = <&gpio1 12 0>;
+ num-chipselects = <1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ gpio_spi: gpio_spi@0 {
+ compatible = "fairchild,74hc595";
+ gpio-controller;
+ #gpio-cells = <2>;
+ reg = <0>;
+ registers-number = <1>;
+ /* Enable PERI_3V3, SENSOR_RST_B and HDMI_RST*/
+ registers-default = /bits/ 8 <0x74>;
+ spi-max-frequency = <100000>;
+ };
+ };
+
regulators {
compatible = "simple-bus";
#address-cells = <1>;
@@ -642,5 +666,13 @@
fsl,pins = <
MX7D_PAD_LPSR_GPIO1_IO01__PWM1_OUT 0x110b0
>;
+
+ pinctrl_spi1: spi1grp {
+ fsl,pins = <
+ MX7D_PAD_GPIO1_IO09__GPIO1_IO9 0x59
+ MX7D_PAD_GPIO1_IO12__GPIO1_IO12 0x59
+ MX7D_PAD_GPIO1_IO13__GPIO1_IO13 0x59
+ >;
+ };
};
};
--
2.9.3
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| From | Fabio Estevam <festevam@gmail.com> |
|---|---|
| Date | 2017-04-14 00:30 +0200 |
| Message-ID | <tvVpv-Xu-5@gated-at.bofh.it> |
| In reply to | #1623018 |
Hi Andrey,
On Thu, Apr 13, 2017 at 10:32 AM, Andrey Smirnov
<andrew.smirnov@gmail.com> wrote:
> diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
> index 5be01a1..e0ff276 100644
> --- a/arch/arm/boot/dts/imx7d-sdb.dts
> +++ b/arch/arm/boot/dts/imx7d-sdb.dts
> @@ -52,6 +52,30 @@
> reg = <0x80000000 0x80000000>;
> };
>
> + spi4 {
Here you use spi4 label...
> + compatible = "spi-gpio";
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_spi1>;
and here spi1, which is a bit confusing.
> + status = "okay";
> + gpio-sck = <&gpio1 13 0>;
> + gpio-mosi = <&gpio1 9 0>;
> + cs-gpios = <&gpio1 12 0>;
You could use GPIO_ACTIVE_HIGH flag for better readability.
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| From | Andrey Smirnov <andrew.smirnov@gmail.com> |
|---|---|
| Date | 2017-04-14 17:30 +0200 |
| Message-ID | <twbkB-2J3-1@gated-at.bofh.it> |
| In reply to | #1623402 |
On Thu, Apr 13, 2017 at 3:20 PM, Fabio Estevam <festevam@gmail.com> wrote:
> Hi Andrey,
>
> On Thu, Apr 13, 2017 at 10:32 AM, Andrey Smirnov
> <andrew.smirnov@gmail.com> wrote:
>
>> diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
>> index 5be01a1..e0ff276 100644
>> --- a/arch/arm/boot/dts/imx7d-sdb.dts
>> +++ b/arch/arm/boot/dts/imx7d-sdb.dts
>> @@ -52,6 +52,30 @@
>> reg = <0x80000000 0x80000000>;
>> };
>>
>> + spi4 {
>
> Here you use spi4 label...
>
>> + compatible = "spi-gpio";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_spi1>;
>
> and here spi1, which is a bit confusing.
>
Agreed. It is confusing, will fix in v2.
>> + status = "okay";
>> + gpio-sck = <&gpio1 13 0>;
>> + gpio-mosi = <&gpio1 9 0>;
>> + cs-gpios = <&gpio1 12 0>;
>
> You could use GPIO_ACTIVE_HIGH flag for better readability.
Missed that, will fix in v2.
Thanks,
Andrey Smirnov
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| From | Shawn Guo <shawnguo@kernel.org> |
|---|---|
| Date | 2017-04-14 05:50 +0200 |
| Message-ID | <tw0pb-4nj-9@gated-at.bofh.it> |
| In reply to | #1623018 |
On Thu, Apr 13, 2017 at 06:32:40AM -0700, Andrey Smirnov wrote:
> Add node for U38, a 74LV595PW serial-in shift register that acts as a
> GPIO expander on the board.
>
> Cc: yurovsky@gmail.com
> Cc: Sascha Hauer <kernel@pengutronix.de>
> Cc: Fabio Estevam <fabio.estevam@nxp.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Russell King <linux@armlinux.org.uk>
> Cc: devicetree@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-arm-kernel@lists.infradead.org
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> ---
> arch/arm/boot/dts/imx7d-sdb.dts | 32 ++++++++++++++++++++++++++++++++
> 1 file changed, 32 insertions(+)
>
> diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
> index 5be01a1..e0ff276 100644
> --- a/arch/arm/boot/dts/imx7d-sdb.dts
> +++ b/arch/arm/boot/dts/imx7d-sdb.dts
> @@ -52,6 +52,30 @@
> reg = <0x80000000 0x80000000>;
> };
>
> + spi4 {
> + compatible = "spi-gpio";
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_spi1>;
> + status = "okay";
The 'status' is not needed in this case.
> + gpio-sck = <&gpio1 13 0>;
> + gpio-mosi = <&gpio1 9 0>;
> + cs-gpios = <&gpio1 12 0>;
> + num-chipselects = <1>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + gpio_spi: gpio_spi@0 {
gpio-expander might be a better node name?
> + compatible = "fairchild,74hc595";
> + gpio-controller;
> + #gpio-cells = <2>;
> + reg = <0>;
> + registers-number = <1>;
> + /* Enable PERI_3V3, SENSOR_RST_B and HDMI_RST*/
> + registers-default = /bits/ 8 <0x74>;
I do not see this property is documented or supported by kernel.
> + spi-max-frequency = <100000>;
> + };
> + };
> +
> regulators {
> compatible = "simple-bus";
> #address-cells = <1>;
> @@ -642,5 +666,13 @@
> fsl,pins = <
> MX7D_PAD_LPSR_GPIO1_IO01__PWM1_OUT 0x110b0
> >;
> +
> + pinctrl_spi1: spi1grp {
> + fsl,pins = <
> + MX7D_PAD_GPIO1_IO09__GPIO1_IO9 0x59
> + MX7D_PAD_GPIO1_IO12__GPIO1_IO12 0x59
> + MX7D_PAD_GPIO1_IO13__GPIO1_IO13 0x59
> + >;
> + };
> };
> };
> --
> 2.9.3
>
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| From | Andrey Smirnov <andrew.smirnov@gmail.com> |
|---|---|
| Date | 2017-04-14 17:40 +0200 |
| Message-ID | <twbuh-2Mv-11@gated-at.bofh.it> |
| In reply to | #1623494 |
On Thu, Apr 13, 2017 at 8:47 PM, Shawn Guo <shawnguo@kernel.org> wrote:
> On Thu, Apr 13, 2017 at 06:32:40AM -0700, Andrey Smirnov wrote:
>> Add node for U38, a 74LV595PW serial-in shift register that acts as a
>> GPIO expander on the board.
>>
>> Cc: yurovsky@gmail.com
>> Cc: Sascha Hauer <kernel@pengutronix.de>
>> Cc: Fabio Estevam <fabio.estevam@nxp.com>
>> Cc: Rob Herring <robh+dt@kernel.org>
>> Cc: Mark Rutland <mark.rutland@arm.com>
>> Cc: Russell King <linux@armlinux.org.uk>
>> Cc: devicetree@vger.kernel.org
>> Cc: linux-kernel@vger.kernel.org
>> Cc: linux-arm-kernel@lists.infradead.org
>> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
>> ---
>> arch/arm/boot/dts/imx7d-sdb.dts | 32 ++++++++++++++++++++++++++++++++
>> 1 file changed, 32 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
>> index 5be01a1..e0ff276 100644
>> --- a/arch/arm/boot/dts/imx7d-sdb.dts
>> +++ b/arch/arm/boot/dts/imx7d-sdb.dts
>> @@ -52,6 +52,30 @@
>> reg = <0x80000000 0x80000000>;
>> };
>>
>> + spi4 {
>> + compatible = "spi-gpio";
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_spi1>;
>> + status = "okay";
>
> The 'status' is not needed in this case.
>
Missed that, will fix in v2.
>> + gpio-sck = <&gpio1 13 0>;
>> + gpio-mosi = <&gpio1 9 0>;
>> + cs-gpios = <&gpio1 12 0>;
>> + num-chipselects = <1>;
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + gpio_spi: gpio_spi@0 {
>
> gpio-expander might be a better node name?
>
Yeah, I agree. I'll change it to extended_io: gpio-expander@0
("Extended IO" is how this part is called out on the schematic)
>> + compatible = "fairchild,74hc595";
>> + gpio-controller;
>> + #gpio-cells = <2>;
>> + reg = <0>;
>> + registers-number = <1>;
>> + /* Enable PERI_3V3, SENSOR_RST_B and HDMI_RST*/
>> + registers-default = /bits/ 8 <0x74>;
>
> I do not see this property is documented or supported by kernel.
My bad, some downstream properties leakage. Will remove in v2.
Thanks,
Andrey Smirnov
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| From | Dong Aisheng <dongas86@gmail.com> |
|---|---|
| Date | 2017-04-14 18:10 +0200 |
| Message-ID | <twbXk-3bL-15@gated-at.bofh.it> |
| In reply to | #1623494 |
On Fri, Apr 14, 2017 at 11:47:00AM +0800, Shawn Guo wrote:
> On Thu, Apr 13, 2017 at 06:32:40AM -0700, Andrey Smirnov wrote:
> > Add node for U38, a 74LV595PW serial-in shift register that acts as a
> > GPIO expander on the board.
> >
> > Cc: yurovsky@gmail.com
> > Cc: Sascha Hauer <kernel@pengutronix.de>
> > Cc: Fabio Estevam <fabio.estevam@nxp.com>
> > Cc: Rob Herring <robh+dt@kernel.org>
> > Cc: Mark Rutland <mark.rutland@arm.com>
> > Cc: Russell King <linux@armlinux.org.uk>
> > Cc: devicetree@vger.kernel.org
> > Cc: linux-kernel@vger.kernel.org
> > Cc: linux-arm-kernel@lists.infradead.org
> > Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> > ---
> > arch/arm/boot/dts/imx7d-sdb.dts | 32 ++++++++++++++++++++++++++++++++
> > 1 file changed, 32 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
> > index 5be01a1..e0ff276 100644
> > --- a/arch/arm/boot/dts/imx7d-sdb.dts
> > +++ b/arch/arm/boot/dts/imx7d-sdb.dts
> > @@ -52,6 +52,30 @@
> > reg = <0x80000000 0x80000000>;
> > };
> >
> > + spi4 {
> > + compatible = "spi-gpio";
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_spi1>;
> > + status = "okay";
>
> The 'status' is not needed in this case.
>
> > + gpio-sck = <&gpio1 13 0>;
> > + gpio-mosi = <&gpio1 9 0>;
> > + cs-gpios = <&gpio1 12 0>;
> > + num-chipselects = <1>;
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + gpio_spi: gpio_spi@0 {
>
> gpio-expander might be a better node name?
>
> > + compatible = "fairchild,74hc595";
> > + gpio-controller;
> > + #gpio-cells = <2>;
> > + reg = <0>;
> > + registers-number = <1>;
> > + /* Enable PERI_3V3, SENSOR_RST_B and HDMI_RST*/
> > + registers-default = /bits/ 8 <0x74>;
>
> I do not see this property is documented or supported by kernel.
It's FSL internal invented property to do some trick on register
intialization and should be dropped.
Regards
Dong Aisheng
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