[PATCH v2 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[PATCH v2 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Doug Anderson]

We need to use the i2c-arbitrator to talk to any of the devices on i2c
bus 4 on exynos5250-snow so that we don't confuse the embedded
controller (EC).  Add the i2c-arbitrator to the device tree.  As we
add future devices (keyboard, sbs, tps65090) we'll add them on top of
this.

The arbitrated bus is numbered 104 simply as a convenience to make it
easier for people poking around to guess that it might have something
to do with the physical bus 4.

The addition is split between the cros5250-common and the snow device
tree file since not all cros5250-class devices use arbitration.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v2:
- Use new device tree property names / compatible string.
- Include that the GPIOs for arbitration are active low.

 arch/arm/boot/dts/cros5250-common.dtsi |  5 ++++-
 arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
index 46c0980..f451375 100644
--- a/arch/arm/boot/dts/cros5250-common.dtsi
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -58,7 +58,10 @@
 	};
 
 	i2c at 12CA0000 {
-		status = "disabled";
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
+		gpios = <&gpa2 0 3 3 0>,
+			<&gpa2 1 3 3 0>;
 	};
 
 	i2c at 12CB0000 {
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index 17dd951..d2d4b48 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -16,6 +16,10 @@
 	model = "Google Snow";
 	compatible = "google,snow", "samsung,exynos5250";
 
+	aliases {
+		i2c104 = &i2c_104;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -29,6 +33,27 @@
 		};
 	};
 
+	i2c-arbitrator {
+		compatible = "i2c-arbitrator-cros-ec";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		i2c-parent = <&{/i2c@12CA0000}>;
+
+		ap-claim-gpio = <&gpf0 3 1 0x10000 0>;
+		ec-claim-gpio = <&gpe0 4 0 0x10003 0>;
+		slew-delay-us = <10>;
+		wait-retry-us = <3000>;
+		wait-free-us = <50000>;
+
+		/* Use ID 104 as a hint that we're on physical bus 4 */
+		i2c_104: i2c at 0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+
 	/*
 	 * On Snow we've got SIP WiFi and so can keep drive strengths low to
 	 * reduce EMI.
-- 
1.8.1

[PATCH v2 3/3] ARM: dts: Add sbs-battery for exynos5250-snow

[Doug Anderson]

Now that we have i2c-arbitrator in place on bus 4 we can add the
sbs-battery driver.  Future devices will be added onto bus 4 once
drivers are in good shape.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v2: None

 arch/arm/boot/dts/exynos5250-snow.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index d2d4b48..2127386 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -51,6 +51,12 @@
 			reg = <0>;
 			#address-cells = <1>;
 			#size-cells = <0>;
+
+			battery: sbs-battery at b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+			};
 		};
 	};
 
-- 
1.8.1

[PATCH v3 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Doug Anderson]

We need to use the i2c-arbitrator to talk to any of the devices on i2c
bus 4 on exynos5250-snow so that we don't confuse the embedded
controller (EC).  Add the i2c-arbitrator to the device tree.  As we
add future devices (keyboard, sbs, tps65090) we'll add them on top of
this.

The arbitrated bus is numbered 104 simply as a convenience to make it
easier for people poking around to guess that it might have something
to do with the physical bus 4.

The addition is split between the cros5250-common and the snow device
tree file since not all cros5250-class devices use arbitration.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v3: None
Changes in v2:
- Use new device tree property names / compatible string.
- Include that the GPIOs for arbitration are active low.

 arch/arm/boot/dts/cros5250-common.dtsi |  5 ++++-
 arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
index 46c0980..f451375 100644
--- a/arch/arm/boot/dts/cros5250-common.dtsi
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -58,7 +58,10 @@
 	};
 
 	i2c at 12CA0000 {
-		status = "disabled";
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
+		gpios = <&gpa2 0 3 3 0>,
+			<&gpa2 1 3 3 0>;
 	};
 
 	i2c at 12CB0000 {
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index 17dd951..d2d4b48 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -16,6 +16,10 @@
 	model = "Google Snow";
 	compatible = "google,snow", "samsung,exynos5250";
 
+	aliases {
+		i2c104 = &i2c_104;
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -29,6 +33,27 @@
 		};
 	};
 
+	i2c-arbitrator {
+		compatible = "i2c-arbitrator-cros-ec";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		i2c-parent = <&{/i2c@12CA0000}>;
+
+		ap-claim-gpio = <&gpf0 3 1 0x10000 0>;
+		ec-claim-gpio = <&gpe0 4 0 0x10003 0>;
+		slew-delay-us = <10>;
+		wait-retry-us = <3000>;
+		wait-free-us = <50000>;
+
+		/* Use ID 104 as a hint that we're on physical bus 4 */
+		i2c_104: i2c at 0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+
 	/*
 	 * On Snow we've got SIP WiFi and so can keep drive strengths low to
 	 * reduce EMI.
-- 
1.8.1

[PATCH v3 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Naveen Krishna Ch]

On 16 February 2013 04:46, Doug Anderson <dianders@chromium.org> wrote:
> We need to use the i2c-arbitrator to talk to any of the devices on i2c
> bus 4 on exynos5250-snow so that we don't confuse the embedded
> controller (EC).  Add the i2c-arbitrator to the device tree.  As we
> add future devices (keyboard, sbs, tps65090) we'll add them on top of
> this.
>
> The arbitrated bus is numbered 104 simply as a convenience to make it
> easier for people poking around to guess that it might have something
> to do with the physical bus 4.
>
> The addition is split between the cros5250-common and the snow device
> tree file since not all cros5250-class devices use arbitration.
>
> Signed-off-by: Doug Anderson <dianders@chromium.org>
Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
The patch set [v3] is tested on snow with test case which uses i2c-4 from both
EC and AP side continuously for a more than a couple of minutes.

> ---
> Changes in v3: None
> Changes in v2:
> - Use new device tree property names / compatible string.
> - Include that the GPIOs for arbitration are active low.
>
>  arch/arm/boot/dts/cros5250-common.dtsi |  5 ++++-
>  arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
>  2 files changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
> index 46c0980..f451375 100644
> --- a/arch/arm/boot/dts/cros5250-common.dtsi
> +++ b/arch/arm/boot/dts/cros5250-common.dtsi
> @@ -58,7 +58,10 @@
>         };
>
>         i2c at 12CA0000 {
> -               status = "disabled";
> +               samsung,i2c-sda-delay = <100>;
> +               samsung,i2c-max-bus-freq = <66000>;
> +               gpios = <&gpa2 0 3 3 0>,
> +                       <&gpa2 1 3 3 0>;
>         };
>
>         i2c at 12CB0000 {
> diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
> index 17dd951..d2d4b48 100644
> --- a/arch/arm/boot/dts/exynos5250-snow.dts
> +++ b/arch/arm/boot/dts/exynos5250-snow.dts
> @@ -16,6 +16,10 @@
>         model = "Google Snow";
>         compatible = "google,snow", "samsung,exynos5250";
>
> +       aliases {
> +               i2c104 = &i2c_104;
> +       };
> +
>         gpio-keys {
>                 compatible = "gpio-keys";
>
> @@ -29,6 +33,27 @@
>                 };
>         };
>
> +       i2c-arbitrator {
> +               compatible = "i2c-arbitrator-cros-ec";
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +
> +               i2c-parent = <&{/i2c@12CA0000}>;
> +
> +               ap-claim-gpio = <&gpf0 3 1 0x10000 0>;
> +               ec-claim-gpio = <&gpe0 4 0 0x10003 0>;
> +               slew-delay-us = <10>;
> +               wait-retry-us = <3000>;
> +               wait-free-us = <50000>;
> +
> +               /* Use ID 104 as a hint that we're on physical bus 4 */
> +               i2c_104: i2c at 0 {
> +                       reg = <0>;
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +               };
> +       };
> +
>         /*
>          * On Snow we've got SIP WiFi and so can keep drive strengths low to
>          * reduce EMI.
> --
> 1.8.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/



--
Shine bright,
(: Nav :)

[PATCH v3 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Kukjin Kim]

Naveen Krishna Ch wrote:
> On 16 February 2013 04:46, Doug Anderson <dianders@chromium.org> wrote:
> > We need to use the i2c-arbitrator to talk to any of the devices on i2c
> > bus 4 on exynos5250-snow so that we don't confuse the embedded
> > controller (EC).  Add the i2c-arbitrator to the device tree.  As we
> > add future devices (keyboard, sbs, tps65090) we'll add them on top of
> > this.
> >
> > The arbitrated bus is numbered 104 simply as a convenience to make it
> > easier for people poking around to guess that it might have something
> > to do with the physical bus 4.
> >
> > The addition is split between the cros5250-common and the snow device
> > tree file since not all cros5250-class devices use arbitration.
> >
> > Signed-off-by: Doug Anderson <dianders@chromium.org>
> Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
> The patch set [v3] is tested on snow with test case which uses i2c-4 from both
> EC and AP side continuously for a more than a couple of minutes.
> 
Thanks for your test and looks good to me.

BTW, Doug, I think, this should be re-worked to use pinctrl. Can you?

Thanks.

- Kukjin

> > ---
> > Changes in v3: None
> > Changes in v2:
> > - Use new device tree property names / compatible string.
> > - Include that the GPIOs for arbitration are active low.
> >
> >  arch/arm/boot/dts/cros5250-common.dtsi |  5 ++++-
> >  arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
> >  2 files changed, 29 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/boot/dts/cros5250-common.dtsi
> b/arch/arm/boot/dts/cros5250-common.dtsi
> > index 46c0980..f451375 100644
> > --- a/arch/arm/boot/dts/cros5250-common.dtsi
> > +++ b/arch/arm/boot/dts/cros5250-common.dtsi
> > @@ -58,7 +58,10 @@
> >         };
> >
> >         i2c at 12CA0000 {
> > -               status = "disabled";
> > +               samsung,i2c-sda-delay = <100>;
> > +               samsung,i2c-max-bus-freq = <66000>;
> > +               gpios = <&gpa2 0 3 3 0>,
> > +                       <&gpa2 1 3 3 0>;
> >         };
> >
> >         i2c at 12CB0000 {
> > diff --git a/arch/arm/boot/dts/exynos5250-snow.dts
> b/arch/arm/boot/dts/exynos5250-snow.dts
> > index 17dd951..d2d4b48 100644
> > --- a/arch/arm/boot/dts/exynos5250-snow.dts
> > +++ b/arch/arm/boot/dts/exynos5250-snow.dts
> > @@ -16,6 +16,10 @@
> >         model = "Google Snow";
> >         compatible = "google,snow", "samsung,exynos5250";
> >
> > +       aliases {
> > +               i2c104 = &i2c_104;
> > +       };
> > +
> >         gpio-keys {
> >                 compatible = "gpio-keys";
> >
> > @@ -29,6 +33,27 @@
> >                 };
> >         };
> >
> > +       i2c-arbitrator {
> > +               compatible = "i2c-arbitrator-cros-ec";
> > +               #address-cells = <1>;
> > +               #size-cells = <0>;
> > +
> > +               i2c-parent = <&{/i2c@12CA0000}>;
> > +
> > +               ap-claim-gpio = <&gpf0 3 1 0x10000 0>;
> > +               ec-claim-gpio = <&gpe0 4 0 0x10003 0>;
> > +               slew-delay-us = <10>;
> > +               wait-retry-us = <3000>;
> > +               wait-free-us = <50000>;
> > +
> > +               /* Use ID 104 as a hint that we're on physical bus 4 */
> > +               i2c_104: i2c at 0 {
> > +                       reg = <0>;
> > +                       #address-cells = <1>;
> > +                       #size-cells = <0>;
> > +               };
> > +       };
> > +
> >         /*
> >          * On Snow we've got SIP WiFi and so can keep drive strengths low to
> >          * reduce EMI.
> > --
> > 1.8.1
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo at vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at  http://www.tux.org/lkml/
> 
> 
> 
> --
> Shine bright,
> (: Nav :)

[PATCH v3 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Doug Anderson]

Kukjin,

On Wed, Mar 13, 2013 at 12:30 AM, Kukjin Kim <kgene.kim@samsung.com> wrote:
> BTW, Doug, I think, this should be re-worked to use pinctrl. Can you?

Yes, I've already got this locally.  I hadn't sent it up yet since I
wasn't sure whether pinctrl would land before or after this.  I'll
send it up today against my local cherry-pick of Thomas's pinctrl
stuff (since it doesn't seem to be in linux-next nor in
arm-soc/for-next).

Naveen: I'm going to keep your Tested-by on all 3 patches if that's
OK.  The only difference will be the gpio specifier in the device tree
and the change is trivial.

-Doug

[PATCH v3 3/3] ARM: dts: Add sbs-battery for exynos5250-snow

[Doug Anderson]

Now that we have i2c-arbitrator in place on bus 4 we can add the
sbs-battery driver.  Future devices will be added onto bus 4 once
drivers are in good shape.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v3: None
Changes in v2: None

 arch/arm/boot/dts/exynos5250-snow.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index d2d4b48..2127386 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -51,6 +51,12 @@
 			reg = <0>;
 			#address-cells = <1>;
 			#size-cells = <0>;
+
+			battery: sbs-battery at b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+			};
 		};
 	};
 
-- 
1.8.1

[PATCH v3 3/3] ARM: dts: Add sbs-battery for exynos5250-snow

[Naveen Krishna Ch]

On 16 February 2013 04:46, Doug Anderson <dianders@chromium.org> wrote:
> Now that we have i2c-arbitrator in place on bus 4 we can add the
> sbs-battery driver.  Future devices will be added onto bus 4 once
> drivers are in good shape.
>
> Signed-off-by: Doug Anderson <dianders@chromium.org>
Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
The patchset v3 is tested on snow with test case which uses i2c-4 from both
EC and AP side continuously for a more than a couple of minutes
> ---
> Changes in v3: None
> Changes in v2: None
>
>  arch/arm/boot/dts/exynos5250-snow.dts | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
> index d2d4b48..2127386 100644
> --- a/arch/arm/boot/dts/exynos5250-snow.dts
> +++ b/arch/arm/boot/dts/exynos5250-snow.dts
> @@ -51,6 +51,12 @@
>                         reg = <0>;
>                         #address-cells = <1>;
>                         #size-cells = <0>;
> +
> +                       battery: sbs-battery at b {
> +                               compatible = "sbs,sbs-battery";
> +                               reg = <0xb>;
> +                               sbs,poll-retry-count = <1>;
> +                       };
>                 };
>         };
>
> --
> 1.8.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/



--
Shine bright,
(: Nav :)

[PATCH v4 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Doug Anderson]

We need to use the i2c-arbitrator to talk to any of the devices on i2c
bus 4 on exynos5250-snow so that we don't confuse the embedded
controller (EC).  Add the i2c-arbitrator to the device tree.  As we
add future devices (keyboard, sbs, tps65090) we'll add them on top of
this.

The arbitrated bus is numbered 104 simply as a convenience to make it
easier for people poking around to guess that it might have something
to do with the physical bus 4.

The addition is split between the cros5250-common and the snow device
tree file since not all cros5250-class devices use arbitration.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
---
Changes in v4:
- Changed mux gpio syntax to work atop Thomas's "ARM: dts: add pin
  state information in client nodes for Exynos5 platforms"; avoid
  adding gpios property to i2c at 12CA0000 for the same reason.

Changes in v3: None
Changes in v2:
- Use new device tree property names / compatible string.
- Include that the GPIOs for arbitration are active low.

 arch/arm/boot/dts/cros5250-common.dtsi |  3 ++-
 arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
index 8a5b3a6..0a61bbb 100644
--- a/arch/arm/boot/dts/cros5250-common.dtsi
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -193,7 +193,8 @@
 	};
 
 	i2c at 12CA0000 {
-		status = "disabled";
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
 	};
 
 	i2c at 12CB0000 {
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index 581ffae..bf16353 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -16,6 +16,10 @@
 	model = "Google Snow";
 	compatible = "google,snow", "samsung,exynos5250";
 
+	aliases {
+		i2c104 = &i2c_104;
+	};
+
 	pinctrl at 11400000 {
 		sd3_clk: sd3-clk {
 			samsung,pin-drv = <0>;
@@ -44,6 +48,27 @@
 		};
 	};
 
+	i2c-arbitrator {
+		compatible = "i2c-arbitrator-cros-ec";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		i2c-parent = <&{/i2c@12CA0000}>;
+
+		ap-claim-gpio = <&gpf0 3 1>;
+		ec-claim-gpio = <&gpe0 4 1>;
+		slew-delay-us = <10>;
+		wait-retry-us = <3000>;
+		wait-free-us = <50000>;
+
+		/* Use ID 104 as a hint that we're on physical bus 4 */
+		i2c_104: i2c at 0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+
 	/*
 	 * On Snow we've got SIP WiFi and so can keep drive strengths low to
 	 * reduce EMI.
-- 
1.8.1.3

[PATCH v4 3/3] ARM: dts: Add sbs-battery for exynos5250-snow

[Doug Anderson]

Now that we have i2c-arbitrator in place on bus 4 we can add the
sbs-battery driver.  Future devices will be added onto bus 4 once
drivers are in good shape.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
---
Changes in v4: None
Changes in v3: None
Changes in v2: None

 arch/arm/boot/dts/exynos5250-snow.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index bf16353..7aa66c8 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -66,6 +66,12 @@
 			reg = <0>;
 			#address-cells = <1>;
 			#size-cells = <0>;
+
+			battery: sbs-battery at b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+			};
 		};
 	};
 
-- 
1.8.1.3

[PATCH v5 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Doug Anderson]

We need to use the i2c-arbitrator to talk to any of the devices on i2c
bus 4 on exynos5250-snow so that we don't confuse the embedded
controller (EC).  Add the i2c-arbitrator to the device tree.  As we
add future devices (keyboard, sbs, tps65090) we'll add them on top of
this.

The arbitrated bus is numbered 104 simply as a convenience to make it
easier for people poking around to guess that it might have something
to do with the physical bus 4.

The addition is split between the cros5250-common and the snow device
tree file since not all cros5250-class devices use arbitration.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v5:
- Adjust bindings as per Wolfram Sang.

Changes in v4:
- Changed mux gpio syntax to work atop Thomas's "ARM: dts: add pin
  state information in client nodes for Exynos5 platforms"; avoid
  adding gpios property to i2c at 12CA0000 for the same reason.

Changes in v3: None
Changes in v2:
- Use new device tree property names / compatible string.
- Include that the GPIOs for arbitration are active low.

 arch/arm/boot/dts/cros5250-common.dtsi |  3 ++-
 arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
index 8a5b3a6..0a61bbb 100644
--- a/arch/arm/boot/dts/cros5250-common.dtsi
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -193,7 +193,8 @@
 	};
 
 	i2c at 12CA0000 {
-		status = "disabled";
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
 	};
 
 	i2c at 12CB0000 {
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index 581ffae..fa85f58 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -16,6 +16,10 @@
 	model = "Google Snow";
 	compatible = "google,snow", "samsung,exynos5250";
 
+	aliases {
+		i2c104 = &i2c_104;
+	};
+
 	pinctrl at 11400000 {
 		sd3_clk: sd3-clk {
 			samsung,pin-drv = <0>;
@@ -44,6 +48,27 @@
 		};
 	};
 
+	i2c-arbitrator {
+		compatible = "i2c-arb-gpio-challenge";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		i2c-parent = <&{/i2c@12CA0000}>;
+
+		our-claim-gpio = <&gpf0 3 1>;
+		their-claim-gpios = <&gpe0 4 1>;
+		slew-delay-us = <10>;
+		wait-retry-us = <3000>;
+		wait-free-us = <50000>;
+
+		/* Use ID 104 as a hint that we're on physical bus 4 */
+		i2c_104: i2c at 0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+
 	/*
 	 * On Snow we've got SIP WiFi and so can keep drive strengths low to
 	 * reduce EMI.
-- 
1.8.1.3

[PATCH v5 3/3] ARM: dts: Add sbs-battery for exynos5250-snow

[Doug Anderson]

Now that we have i2c-arbitrator in place on bus 4 we can add the
sbs-battery driver.  Future devices will be added onto bus 4 once
drivers are in good shape.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 arch/arm/boot/dts/exynos5250-snow.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index fa85f58..c115143 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -66,6 +66,12 @@
 			reg = <0>;
 			#address-cells = <1>;
 			#size-cells = <0>;
+
+			battery: sbs-battery at b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+			};
 		};
 	};
 
-- 
1.8.1.3

[PATCH v5 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Doug Anderson]

We need to use the i2c-arbitrator to talk to any of the devices on i2c
bus 4 on exynos5250-snow so that we don't confuse the embedded
controller (EC).  Add the i2c-arbitrator to the device tree.  As we
add future devices (keyboard, sbs, tps65090) we'll add them on top of
this.

The arbitrated bus is numbered 104 simply as a convenience to make it
easier for people poking around to guess that it might have something
to do with the physical bus 4.

The addition is split between the cros5250-common and the snow device
tree file since not all cros5250-class devices use arbitration.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v5:
- Adjust bindings as per Wolfram Sang.

Changes in v4:
- Changed mux gpio syntax to work atop Thomas's "ARM: dts: add pin
  state information in client nodes for Exynos5 platforms"; avoid
  adding gpios property to i2c at 12CA0000 for the same reason.

Changes in v3: None
Changes in v2:
- Use new device tree property names / compatible string.
- Include that the GPIOs for arbitration are active low.

 arch/arm/boot/dts/cros5250-common.dtsi |  3 ++-
 arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
index 8a5b3a6..0a61bbb 100644
--- a/arch/arm/boot/dts/cros5250-common.dtsi
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -193,7 +193,8 @@
 	};
 
 	i2c at 12CA0000 {
-		status = "disabled";
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
 	};
 
 	i2c at 12CB0000 {
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index 581ffae..fa85f58 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -16,6 +16,10 @@
 	model = "Google Snow";
 	compatible = "google,snow", "samsung,exynos5250";
 
+	aliases {
+		i2c104 = &i2c_104;
+	};
+
 	pinctrl at 11400000 {
 		sd3_clk: sd3-clk {
 			samsung,pin-drv = <0>;
@@ -44,6 +48,27 @@
 		};
 	};
 
+	i2c-arbitrator {
+		compatible = "i2c-arb-gpio-challenge";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		i2c-parent = <&{/i2c@12CA0000}>;
+
+		our-claim-gpio = <&gpf0 3 1>;
+		their-claim-gpios = <&gpe0 4 1>;
+		slew-delay-us = <10>;
+		wait-retry-us = <3000>;
+		wait-free-us = <50000>;
+
+		/* Use ID 104 as a hint that we're on physical bus 4 */
+		i2c_104: i2c at 0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+
 	/*
 	 * On Snow we've got SIP WiFi and so can keep drive strengths low to
 	 * reduce EMI.
-- 
1.8.1.3

[PATCH v5 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Kukjin Kim]

Doug Anderson wrote:
> 
> We need to use the i2c-arbitrator to talk to any of the devices on i2c
> bus 4 on exynos5250-snow so that we don't confuse the embedded
> controller (EC).  Add the i2c-arbitrator to the device tree.  As we
> add future devices (keyboard, sbs, tps65090) we'll add them on top of
> this.
> 
> The arbitrated bus is numbered 104 simply as a convenience to make it
> easier for people poking around to guess that it might have something
> to do with the physical bus 4.
> 
> The addition is split between the cros5250-common and the snow device
> tree file since not all cros5250-class devices use arbitration.
> 
> Signed-off-by: Doug Anderson <dianders@chromium.org>

I'm fine on 2nd and 3rd patches. Shall I take only two patches without 1st
one in samsung tree?

- Kukjin

> ---
> Changes in v5:
> - Adjust bindings as per Wolfram Sang.
> 
> Changes in v4:
> - Changed mux gpio syntax to work atop Thomas's "ARM: dts: add pin
>   state information in client nodes for Exynos5 platforms"; avoid
>   adding gpios property to i2c at 12CA0000 for the same reason.
> 
> Changes in v3: None
> Changes in v2:
> - Use new device tree property names / compatible string.
> - Include that the GPIOs for arbitration are active low.
> 
>  arch/arm/boot/dts/cros5250-common.dtsi |  3 ++-
>  arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
>  2 files changed, 27 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/cros5250-common.dtsi
> b/arch/arm/boot/dts/cros5250-common.dtsi
> index 8a5b3a6..0a61bbb 100644
> --- a/arch/arm/boot/dts/cros5250-common.dtsi
> +++ b/arch/arm/boot/dts/cros5250-common.dtsi
> @@ -193,7 +193,8 @@
>  	};
> 
>  	i2c at 12CA0000 {
> -		status = "disabled";
> +		samsung,i2c-sda-delay = <100>;
> +		samsung,i2c-max-bus-freq = <66000>;
>  	};
> 
>  	i2c at 12CB0000 {
> diff --git a/arch/arm/boot/dts/exynos5250-snow.dts
> b/arch/arm/boot/dts/exynos5250-snow.dts
> index 581ffae..fa85f58 100644
> --- a/arch/arm/boot/dts/exynos5250-snow.dts
> +++ b/arch/arm/boot/dts/exynos5250-snow.dts
> @@ -16,6 +16,10 @@
>  	model = "Google Snow";
>  	compatible = "google,snow", "samsung,exynos5250";
> 
> +	aliases {
> +		i2c104 = &i2c_104;
> +	};
> +
>  	pinctrl at 11400000 {
>  		sd3_clk: sd3-clk {
>  			samsung,pin-drv = <0>;
> @@ -44,6 +48,27 @@
>  		};
>  	};
> 
> +	i2c-arbitrator {
> +		compatible = "i2c-arb-gpio-challenge";
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		i2c-parent = <&{/i2c@12CA0000}>;
> +
> +		our-claim-gpio = <&gpf0 3 1>;
> +		their-claim-gpios = <&gpe0 4 1>;
> +		slew-delay-us = <10>;
> +		wait-retry-us = <3000>;
> +		wait-free-us = <50000>;
> +
> +		/* Use ID 104 as a hint that we're on physical bus 4 */
> +		i2c_104: i2c at 0 {
> +			reg = <0>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +	};
> +
>  	/*
>  	 * On Snow we've got SIP WiFi and so can keep drive strengths low
> to
>  	 * reduce EMI.
> --
> 1.8.1.3

[PATCH v5 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Wolfram Sang]

On Wed, Apr 10, 2013 at 07:59:17PM +0900, Kukjin Kim wrote:
> Doug Anderson wrote:
> > 
> > We need to use the i2c-arbitrator to talk to any of the devices on i2c
> > bus 4 on exynos5250-snow so that we don't confuse the embedded
> > controller (EC).  Add the i2c-arbitrator to the device tree.  As we
> > add future devices (keyboard, sbs, tps65090) we'll add them on top of
> > this.
> > 
> > The arbitrated bus is numbered 104 simply as a convenience to make it
> > easier for people poking around to guess that it might have something
> > to do with the physical bus 4.
> > 
> > The addition is split between the cros5250-common and the snow device
> > tree file since not all cros5250-class devices use arbitration.
> > 
> > Signed-off-by: Doug Anderson <dianders@chromium.org>
> 
> I'm fine on 2nd and 3rd patches. Shall I take only two patches without 1st
> one in samsung tree?

Please wait for my OK on patch 1. Or ack patches 2 and 3 and I will pick
them up. I am fine with both.

[PATCH v5 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Kukjin Kim]

On 04/10/13 20:02, Wolfram Sang wrote:
> On Wed, Apr 10, 2013 at 07:59:17PM +0900, Kukjin Kim wrote:
>> Doug Anderson wrote:
>>>
>>> We need to use the i2c-arbitrator to talk to any of the devices on i2c
>>> bus 4 on exynos5250-snow so that we don't confuse the embedded
>>> controller (EC).  Add the i2c-arbitrator to the device tree.  As we
>>> add future devices (keyboard, sbs, tps65090) we'll add them on top of
>>> this.
>>>
>>> The arbitrated bus is numbered 104 simply as a convenience to make it
>>> easier for people poking around to guess that it might have something
>>> to do with the physical bus 4.
>>>
>>> The addition is split between the cros5250-common and the snow device
>>> tree file since not all cros5250-class devices use arbitration.
>>>
>>> Signed-off-by: Doug Anderson<dianders@chromium.org>
>>
>> I'm fine on 2nd and 3rd patches. Shall I take only two patches without 1st
>> one in samsung tree?
>
> Please wait for my OK on patch 1. Or ack patches 2 and 3 and I will pick
> them up. I am fine with both.
>
OK, I will wait for your reply on this. Because I suppose if the dt 
patches in your tree could make useless conflicts. Anyway let me know 
your opinion on that.

Thanks.

- Kukjin

[PATCH v5 3/3] ARM: dts: Add sbs-battery for exynos5250-snow

[Doug Anderson]

Now that we have i2c-arbitrator in place on bus 4 we can add the
sbs-battery driver.  Future devices will be added onto bus 4 once
drivers are in good shape.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 arch/arm/boot/dts/exynos5250-snow.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index fa85f58..c115143 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -66,6 +66,12 @@
 			reg = <0>;
 			#address-cells = <1>;
 			#size-cells = <0>;
+
+			battery: sbs-battery at b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+			};
 		};
 	};
 
-- 
1.8.1.3

[PATCH v6 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Doug Anderson]

We need to use the i2c-arbitrator to talk to any of the devices on i2c
bus 4 on exynos5250-snow so that we don't confuse the embedded
controller (EC).  Add the i2c-arbitrator to the device tree.  As we
add future devices (keyboard, sbs, tps65090) we'll add them on top of
this.

The arbitrated bus is numbered 104 simply as a convenience to make it
easier for people poking around to guess that it might have something
to do with the physical bus 4.

The addition is split between the cros5250-common and the snow device
tree file since not all cros5250-class devices use arbitration.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v6: None
Changes in v5:
- Adjust bindings as per Wolfram Sang.

Changes in v4:
- Changed mux gpio syntax to work atop Thomas's "ARM: dts: add pin
  state information in client nodes for Exynos5 platforms"; avoid
  adding gpios property to i2c at 12CA0000 for the same reason.

Changes in v3: None
Changes in v2:
- Use new device tree property names / compatible string.
- Include that the GPIOs for arbitration are active low.

 arch/arm/boot/dts/cros5250-common.dtsi |  3 ++-
 arch/arm/boot/dts/exynos5250-snow.dts  | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
index 8a5b3a6..0a61bbb 100644
--- a/arch/arm/boot/dts/cros5250-common.dtsi
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -193,7 +193,8 @@
 	};
 
 	i2c at 12CA0000 {
-		status = "disabled";
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
 	};
 
 	i2c at 12CB0000 {
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index 581ffae..fa85f58 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -16,6 +16,10 @@
 	model = "Google Snow";
 	compatible = "google,snow", "samsung,exynos5250";
 
+	aliases {
+		i2c104 = &i2c_104;
+	};
+
 	pinctrl at 11400000 {
 		sd3_clk: sd3-clk {
 			samsung,pin-drv = <0>;
@@ -44,6 +48,27 @@
 		};
 	};
 
+	i2c-arbitrator {
+		compatible = "i2c-arb-gpio-challenge";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		i2c-parent = <&{/i2c@12CA0000}>;
+
+		our-claim-gpio = <&gpf0 3 1>;
+		their-claim-gpios = <&gpe0 4 1>;
+		slew-delay-us = <10>;
+		wait-retry-us = <3000>;
+		wait-free-us = <50000>;
+
+		/* Use ID 104 as a hint that we're on physical bus 4 */
+		i2c_104: i2c at 0 {
+			reg = <0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+
 	/*
 	 * On Snow we've got SIP WiFi and so can keep drive strengths low to
 	 * reduce EMI.
-- 
1.8.1.3

[PATCH v6 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

[Olof Johansson]

On Tue, Apr 16, 2013 at 09:29:01AM -0700, Doug Anderson wrote:
> We need to use the i2c-arbitrator to talk to any of the devices on i2c
> bus 4 on exynos5250-snow so that we don't confuse the embedded
> controller (EC).  Add the i2c-arbitrator to the device tree.  As we
> add future devices (keyboard, sbs, tps65090) we'll add them on top of
> this.
> 
> The arbitrated bus is numbered 104 simply as a convenience to make it
> easier for people poking around to guess that it might have something
> to do with the physical bus 4.
> 
> The addition is split between the cros5250-common and the snow device
> tree file since not all cros5250-class devices use arbitration.
> 
> Signed-off-by: Doug Anderson <dianders@chromium.org>

Acked-by: Olof Johansson <olof@lixom.net>


-Olof

[PATCH v6 3/3] ARM: dts: Add sbs-battery for exynos5250-snow

[Doug Anderson]

Now that we have i2c-arbitrator in place on bus 4 we can add the
sbs-battery driver.  Future devices will be added onto bus 4 once
drivers are in good shape.

Signed-off-by: Doug Anderson <dianders@chromium.org>
---
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

 arch/arm/boot/dts/exynos5250-snow.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index fa85f58..c115143 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -66,6 +66,12 @@
 			reg = <0>;
 			#address-cells = <1>;
 			#size-cells = <0>;
+
+			battery: sbs-battery at b {
+				compatible = "sbs,sbs-battery";
+				reg = <0xb>;
+				sbs,poll-retry-count = <1>;
+			};
 		};
 	};
 
-- 
1.8.1.3

[PATCH v6 3/3] ARM: dts: Add sbs-battery for exynos5250-snow

[Olof Johansson]

On Tue, Apr 16, 2013 at 09:29:02AM -0700, Doug Anderson wrote:
> Now that we have i2c-arbitrator in place on bus 4 we can add the
> sbs-battery driver.  Future devices will be added onto bus 4 once
> drivers are in good shape.
> 
> Signed-off-by: Doug Anderson <dianders@chromium.org>

Acked-by: Olof Johansson <olof@lixom.net>


-Olof