Re: [RFC 4/4] ARM: dts: exynos5250: Add Spring device tree

From: Doug Anderson
Date: Tue Jun 24 2014 - 00:05:32 EST

Andreas,

On Mon, Jun 23, 2014 at 3:46 PM, Andreas FÃrber <afaerber@xxxxxxx> wrote:
> Hi Doug,
>
> Am 23.06.2014 21:47, schrieb Doug Anderson:
>> Thanks for posting! A first pass on this is below...
>
> Thanks a lot for your quick review! My first big .dts patch, and no
> datasheets for the hardware at hand as a user.
>
> A first pass of replies to my defense. ;)
>
>> On Sun, Jun 22, 2014 at 6:21 PM, Andreas FÃrber <afaerber@xxxxxxx> wrote:
> [...]
>>> diff --git a/arch/arm/boot/dts/exynos5250-spring.dts b/arch/arm/boot/dts/exynos5250-spring.dts
>>> new file mode 100644
>>> index 0000000..e857d44
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/exynos5250-spring.dts
>>> @@ -0,0 +1,556 @@
>>> +/*
>>> + * Google Spring board device tree source
>>> + *
>>> + * Copyright (c) 2013 Google, Inc
>>> + * Copyright (c) 2014 SUSE LINUX Products GmbH
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify
>>> + * it under the terms of the GNU General Public License version 2 as
>>> + * published by the Free Software Foundation.
>>> + */
>>> +
>>> +/dts-v1/;
>>> +#include "exynos5250.dtsi"
>>> +#include "exynos5250-cros-common.dtsi"
>>
>> It is possible we may want to backpedal on the use of
>> "exynos5250-cros-common.dtsi". I know that Olof (now CCed) said he
>> wasn't a fan of how it turned out.
>>
>> The original idea was that it should include the arbitrary set of
>> things that are common between a chunk of Chrome OS boards. As more
>> boards were introduced things would need to migrate from the "common"
>> file to the board files.
>>
>> At the moment the current conventional wisdom is that some duplication
>> is better than the confusing movement of everything back and forth.
>> See exynos5420-peach-pit and exynos5800-peach-pi in ToT linux-next.
>>
>>
>>> +/ {
>>> + model = "Google Spring";
>>> + compatible = "google,spring", "samsung,exynos5250", "samsung,exynos5";
>>> +
>>> + pinctrl@11400000 {
>>
>> The new best way to do things is to put this down at the bottom. See
>> exynos5420-peach-pit as an example:
>>
>> &pinctrl_0 {
>> ...
>> }
>>
>> Note that I believe it was decided that top-level references like that
>> should be sorted alphabetically.
>
> Thanks for the hint. (My chosen sort order here was by address.)
>
>> If you wanted to apply that run to exynos5250-snow I don't think it
>> would be a terrible idea.
>
> I can of course apply changes to Snow, but I cannot test them myself.

If you want to send up a patch like that I'm happy to give it a once
over and also to test it. ...but don't feel obligated


>>> + s5m8767_dvs: s5m8767-dvs {
>>> + samsung,pins = "gpd1-0", "gpd1-1", "gpd1-2";
>>> + samsung,pin-function = <0>;
>>> + samsung,pin-pud = <1>;
>>> + samsung,pin-drv = <0>;
>>> + };
>>> +
>>> + s5m8767_ds: s5m8767-ds {
>>> + samsung,pins = "gpx2-3", "gpx2-4", "gpx2-5";
>>> + samsung,pin-function = <0>;
>>> + samsung,pin-pud = <1>;
>>> + samsung,pin-drv = <0>;
>>> + };
>>> +
>>> + tps65090_irq: tps65090-irq {
>>> + samsung,pins = "gpx2-6";
>>> + samsung,pin-function = <0>;
>>> + samsung,pin-pud = <0>;
>>> + samsung,pin-drv = <0>;
>>> + };
>>> +
>>> + s5m8767_irq: s5m8767-irq {
>>> + samsung,pins = "gpx3-2";
>>> + samsung,pin-function = <0>;
>>> + samsung,pin-pud = <0>;
>>> + samsung,pin-drv = <0>;
>>> + };
>>> +
>>> + hdmi_hpd_irq: hdmi-hpd-irq {
>>> + samsung,pins = "gpx3-7";
>>> + samsung,pin-function = <0>;
>>> + samsung,pin-pud = <1>;
>>> + samsung,pin-drv = <0>;
>>> + };
>>> + };
>>> +
>>> + pinctrl@13400000 {
>>> + hsic_reset: hsic-reset {
>>> + samsung,pins = "gpe1-0";
>>> + samsung,pin-function = <1>;
>>> + samsung,pin-pud = <0>;
>>> + samsung,pin-drv = <0>;
>>> + };
>>
>> I'm pretty sure that the HSIC reset needed some funky code to make it
>> work and I'm not sure what the status of that is upstream
>
> Yeah, you mentioned something along those lines. However it's the
> equivalent of the usb3-vbus-en in -snow.dts. Rename or drop?

On snow locally I see USB2 vbus is gpx1-1 and USB3 vbus is gpx2-7. I
don't see that in spring.

This will take more time than I have right now to track down. I added
Julius to the thread in case he has time to answer and can suggest
what to do for upstream purposes. I may be able to look more
tomorrow.

You can always send up the next version and include this and we'll
look at it again.


>>> + };
>>> +
>>> + vbat: vbat-fixed-regulator {
>>> + compatible = "regulator-fixed";
>>> + regulator-name = "vbat-supply";
>>> + regulator-boot-on;
>>> + };
>>> +
>>> + usb@12000000 {
>>> + status = "okay";
>>> + };
>>> +
>>> + usb3_vbus_reg: regulator-usb3 {
>>> + compatible = "regulator-fixed";
>>> + regulator-name = "P5.0V_USB3CON";
>>> + regulator-min-microvolt = <5000000>;
>>> + regulator-max-microvolt = <5000000>;
>>> + gpio = <&gpe1 0 1>;
>>> + pinctrl-names = "default";
>>> + pinctrl-0 = <&hsic_reset>;
>>> + enable-active-high;
>>> + };
>>> +
>>> + phy@12100000 {
>>> + vbus-supply = <&usb3_vbus_reg>;
>>> + };
>>> +
>>> + usb@12110000 {
>>> + samsung,vbus-gpio = <&gpx1 1 0>;
>>> + status = "okay";
>>> + };
>>> +
>>> + usb@12120000 {
>>> + status = "okay";
>>> + };
>>> +
>>> + mmc@12220000 {
>>> + /* MMC2 pins are used as GPIO for eDP bridge control. */
>>> + status = "disabled";
>>> + };
>>> +
>>> + mmc@12230000 {
>>> + status = "disabled";
>>> + };
>>> +
>>> + i2c@12C60000 {
>>> + max77686@09 {
>>
>> There is no max77686 on spring. It uses s5m8767 in the place of max77686.
>>
>> ...you've got "status = disabled", just remove it.
>
> That's because it's inherited from exynos5250-cros-common.dtsi.

Ah, right. So if we're keeping cros-common the proper thing to do is
to move it out of cros-common in a patch before this one. ...but I
think people might be happier if you simply don't include cros-common.


> The rtc that the system successfully uses is "s5m-rtc", which I guess is
> on the s5m8767 then? (Confusing that 3.8 Spring had this rtc node
> despite Snow's max77686 not having it.)

I think it's not really supposed to. It was a bit of a hack to handle
the fact that the RTC has two different i2c addresses on both the
77686 and this PMIC. The max77686 driver upstream handles it all in
code and doesn't ask the device tree to list both addresses.

I think that _upstream_ snow doesn't have the node but _downstream_
spring might have the node (though having a child of a disabled node
isn't particularly useful).


>>> + #address-cells = <1>;
>>> + #size-cells = <0>;
>>> + status = "disabled";
>>> +
>>> + rtc {
>>> + reg = <0x6>;
>>> + };
>>> + };
>>> +
>>> + s5m8767_pmic@66 {
>>> + compatible = "samsung,s5m8767-pmic";
>>> + reg = <0x66>;
>>> + interrupt-parent = <&gpx3>;
>>> + interrupts = <2 0>;
>>> + pinctrl-names = "default";
>>> + pinctrl-0 = <&s5m8767_irq &s5m8767_dvs &s5m8767_ds>;
>>> + wakeup-source;
>>> +
>>> + s5m8767,pmic-buck-dvs-gpios = <&gpd1 0 1>, /* DVS1 */
>>> + <&gpd1 1 1>, /* DVS2 */
>>> + <&gpd1 2 1>; /* DVS3 */
>>> +
>>> + s5m8767,pmic-buck-ds-gpios = <&gpx2 3 1>, /* SET1 */
>>> + <&gpx2 4 1>, /* SET2 */
>>> + <&gpx2 5 1>; /* SET3 */
>>
>> The final "1" in each of the GPIO specifiers above should be GPIO_ACTIVE_LOW.
>>
>>
>>> +
>>> + /*
>>> + * The following arrays of DVS voltages are not used, since we are
>>> + * not using GPIOs to control PMIC bucks, but they must be defined
>>> + * to please the driver.
>>> + */
>>> + s5m8767,pmic-buck2-dvs-voltage = <1350000>, <1300000>,
>>> + <1250000>, <1200000>,
>>> + <1150000>, <1100000>,
>>> + <1000000>, <950000>;
>>> +
>>> + s5m8767,pmic-buck3-dvs-voltage = <1100000>, <1100000>,
>>> + <1100000>, <1100000>,
>>> + <1000000>, <1000000>,
>>> + <1000000>, <1000000>;
>>> +
>>> + s5m8767,pmic-buck4-dvs-voltage = <1200000>, <1200000>,
>>> + <1200000>, <1200000>,
>>> + <1200000>, <1200000>,
>>> + <1200000>, <1200000>;
>>> +
>>> + clocks {
>>> + compatible = "samsung,s5m8767-clk";
>>> + #clock-cells = <1>;
>>> + clock-output-names = "en32khz_ap",
>>> + "en32khz_cp",
>>> + "en32khz_bt";
>>> + };
>>> +
>>> + regulators {
>>> + s5m_ldo4_reg: LDO4 {
>>> + regulator-name = "P1.0V_LDO_OUT4";
>>> + regulator-min-microvolt = <1000000>;
>>> + regulator-max-microvolt = <1000000>;
>>> + regulator-always-on;
>>> + op_mode = <0>;
>>
>> I think that "op_mode" here is questionable. Adding Javier to the
>> thread who was looking at this for max77802 and possibly max77686.
>
> Confirming that this op_mode is present in the original 3.8 device tree.

Yes and it needs to be handled eventually. It makes suspend/resume
work properly. ...but I think it needs to be thought out better.

...but given that other users of this PMIC have it I guess it makes
sense to leave it in. Javier was going to try to think it through
better for max77686 and max77802.


> (I used dtc to compile my /proc/device-tree tarball back to .dts, so it
> has hexadecimal <0x0> but that shouldn't matter to dtc AFAIU.)
>
>>> + };
>>> +
>>> + s5m_ldo5_reg: LDO5 {
>>> + regulator-name = "P1.0V_LDO_OUT5";
>>> + regulator-min-microvolt = <1000000>;
>>> + regulator-max-microvolt = <1000000>;
>>> + regulator-always-on;
>>> + op_mode = <0>;
>>> + };
>>> +
>>> + s5m_ldo6_reg: LDO6 {
>>> + regulator-name = "vdd_mydp";
>>> + regulator-min-microvolt = <1000000>;
>>> + regulator-max-microvolt = <1000000>;
>>> + regulator-always-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + s5m_ldo7_reg: LDO7 {
>>> + regulator-name = "P1.1V_LDO_OUT7";
>>> + regulator-min-microvolt = <1100000>;
>>> + regulator-max-microvolt = <1100000>;
>>> + regulator-always-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + s5m_ldo8_reg: LDO8 {
>>> + regulator-name = "P1.0V_LDO_OUT8";
>>> + regulator-min-microvolt = <1000000>;
>>> + regulator-max-microvolt = <1000000>;
>>> + regulator-always-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + s5m_ldo10_reg: LDO10 {
>>> + regulator-name = "P1.8V_LDO_OUT10";
>>> + regulator-min-microvolt = <1800000>;
>>> + regulator-max-microvolt = <1800000>;
>>> + regulator-always-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + s5m_ldo11_reg: LDO11 {
>>> + regulator-name = "P1.8V_LDO_OUT11";
>>> + regulator-min-microvolt = <1800000>;
>>> + regulator-max-microvolt = <1800000>;
>>> + regulator-always-on;
>>> + op_mode = <0>;
>>> + };
>>> +
>>> + s5m_ldo12_reg: LDO12 {
>>> + regulator-name = "P3.0V_LDO_OUT12";
>>> + regulator-min-microvolt = <3000000>;
>>> + regulator-max-microvolt = <3000000>;
>>> + regulator-always-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + s5m_ldo13_reg: LDO13 {
>>> + regulator-name = "P1.8V_LDO_OUT13";
>>> + regulator-min-microvolt = <1800000>;
>>> + regulator-max-microvolt = <1800000>;
>>> + regulator-always-on;
>>> + op_mode = <0>;
>>> + };
>>> +
>>> + s5m_ldo14_reg: LDO14 {
>>> + regulator-name = "P1.8V_LDO_OUT14";
>>> + regulator-min-microvolt = <1800000>;
>>> + regulator-max-microvolt = <1800000>;
>>> + regulator-always-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + s5m_ldo15_reg: LDO15 {
>>> + regulator-name = "P1.0V_LDO_OUT15";
>>> + regulator-min-microvolt = <1000000>;
>>> + regulator-max-microvolt = <1000000>;
>>> + regulator-always-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + s5m_ldo16_reg: LDO16 {
>>> + regulator-name = "P1.8V_LDO_OUT16";
>>> + regulator-min-microvolt = <1800000>;
>>> + regulator-max-microvolt = <1800000>;
>>> + regulator-always-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + s5m_ldo17_reg: LDO17 {
>>> + regulator-name = "P2.8V_LDO_OUT17";
>>> + regulator-min-microvolt = <2800000>;
>>> + regulator-max-microvolt = <2800000>;
>>> + regulator-always-on;
>>> + op_mode = <0>;
>>> + };
>>> +
>>> + s5m_ldo25_reg: LDO25 {
>>> + regulator-name = "vdd_bridge";
>>> + regulator-min-microvolt = <1200000>;
>>> + regulator-max-microvolt = <1200000>;
>>> + regulator-always-on;
>>> + op_mode = <1>;
>>> + };
>>> +
>>> + BUCK1 {
>>> + regulator-name = "vdd_mif";
>>> + regulator-min-microvolt = <950000>;
>>> + regulator-max-microvolt = <1300000>;
>>> + regulator-always-on;
>>> + regulator-boot-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + BUCK2 {
>>> + regulator-name = "vdd_arm";
>>> + regulator-min-microvolt = <850000>;
>>> + regulator-max-microvolt = <1350000>;
>>> + regulator-always-on;
>>> + regulator-boot-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + BUCK3 {
>>> + regulator-name = "vdd_int";
>>> + regulator-min-microvolt = <900000>;
>>> + regulator-max-microvolt = <1200000>;
>>> + regulator-always-on;
>>> + regulator-boot-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + BUCK4 {
>>> + regulator-name = "vdd_g3d";
>>> + regulator-min-microvolt = <850000>;
>>> + regulator-max-microvolt = <1300000>;
>>> + regulator-boot-on;
>>> + op_mode = <3>;
>>> + };
>>> +
>>> + BUCK5 {
>>> + regulator-name = "P1.8V_BUCK_OUT5";
>>> + regulator-min-microvolt = <1800000>;
>>> + regulator-max-microvolt = <1800000>;
>>> + regulator-always-on;
>>> + regulator-boot-on;
>>> + op_mode = <1>;
>>> + };
>>> +
>>> + BUCK6 {
>>> + regulator-name = "P1.2V_BUCK_OUT6";
>>> + regulator-min-microvolt = <1200000>;
>>> + regulator-max-microvolt = <1200000>;
>>> + regulator-always-on;
>>> + regulator-boot>
>>
> -on;
>>> + op_mode = <0>;
>>> + };
>>> +
>>> + BUCK9 {
>>> + regulator-name = "vdd_ummc";
>>> + regulator-min-microvolt = <950000>;
>>> + regulator-max-microvolt = <3000000>;
>>> + regulator-always-on;
>>> + regulator-boot-on;
>>> + op_mode = <3>;
>>> + };
>>> + };
>>> + };
>>> + };
>>> +
>>> + i2c@12C70000 {
>>> + trackpad {
>>> + status = "disabled";
>>
>> Having this bogus entry here doesn't add anything. Remove it until
>> the trackpad should be added. See http://crbug.com/371114 for a
>> slightly stale bug about trackpad.
>
> You misunderstand: This resolves an error about the cypress,cyapa
> inherited from -cros-common.dtsi. Spring uses a different device and two
> different I2C addresses.

Ah, right. I forgot about cros5250-common.


> Nodes named trackpad-bootloader and trackpad-alt are prepared here:
> https://github.com/afaerber/linux/commits/spring-next

It might work, but you run into pinctrl problems. You need to put the
pinctrl node _somewhere_ and if you put it with the trackpad entries
themselves then you get conflicts. ...and it doesn't belong in the
i2c bus (though that's what we have locally in our tree)

See <http://permalink.gmane.org/gmane.linux.kernel.samsung-soc/30953>
for some background.


>>> + };
>>> + };
>>> +
>>> + i2c@12CA0000 {
>>> + embedded-controller {
>>
>> Add "cros_ec" alias like snow.
>>
>>
>>> + compatible = "google,cros-ec-i2c";
>>> + reg = <0x1e>;
>>> + interrupts = <6 0>;
>>> + interrupt-parent = <&gpx1>;
>>> + wakeup-source;
>>> +
>>> + keyboard-controller {
>>
>> Don't include keyboard-controller here. Add:
>>
>> #include "cros-ec-keyboard.dtsi"
>>
>> ...at the bottom. Note that I think that the spring EC has a special
>> "charger" key that it uses to indicate when a charger was plugged in
>> and unplugged. I'm not sure how that will end up getting supported
>> upstream but you could just leave it out for now.
>
> Is there such a pending patch for snow? That's what I modeled after.

Yeah, and it appears to be in linux-next. (1a395e3 ARM: dts: Use the
cros-ec-keyboard fragment in exynos5250-snow). It actually ended up
going through the tegra tree since it was in a series with a similar
tegra change. I asked Kukjin to pick it up via merge but he didn't
appear to.


> Where is cros-ec-keyboard.dtsi? Don't see it in
> http://git.kernel.org/cgit/linux/kernel/git/kgene/linux-samsung.git/tree/arch/arm/boot/dts?h=for-next
> or
> http://git.kernel.org/cgit/linux/kernel/git/kgene/linux-samsung.git/tree/include/dt-bindings?h=for-next
>
> Are you proposing I factor it out?
>
>>> + compatible = "google,cros-ec-keyb";
>>> + keypad,num-rows = <8>;
>>> + keypad,num-columns = <13>;
>>
>> Don't you need pinctrl here?
>
> The keyboard is usable; what would pinctrl be needed for? There's none
> in the 3.8 device tree.

Generally it's good to have the pinctrl listed to configure the IRQ
properly (get the pulls right). It might work without it but it's a
little less ideal I think.

I see this, right?

pinctrl-names = "default";
pinctrl-0 = <&ec_irq>;

...in the downstream "arch/arm/boot/dts/exynos5250-spring.dts"


>>> + google,needs-ghost-filter;
>>> + linux,keymap = <
>>> + 0x0001007d /* L_META */
>>> + 0x0002003b /* F1 */
>>> + 0x00030030 /* B */
>>> + 0x00040044 /* F10 */
>>> + 0x00060031 /* N */
>>> + 0x0008000d /* = */
>>> + 0x000a0064 /* R_ALT */
>>> +
>>> + 0x01010001 /* ESC */
>>> + 0x0102003e /* F4 */
>>> + 0x01030022 /* G */
>>> + 0x01040041 /* F7 */
>>> + 0x01060023 /* H */
>>> + 0x01080028 /* ' */
>>> + 0x01090043 /* F9 */
>>> + 0x010b000e /* BKSPACE */
>>> +
>>> + 0x0200001d /* L_CTRL */
>>> + 0x0201000f /* TAB */
>>> + 0x0202003d /* F3 */
>>> + 0x02030014 /* T */
>>> + 0x02040040 /* F6 */
>>> + 0x0205001b /* ] */
>>> + 0x02060015 /* Y */
>>> + 0x02070056 /* 102ND */
>>> + 0x0208001a /* [ */
>>> + 0x02090042 /* F8 */
>>> +
>>> + 0x03010029 /* GRAVE */
>>> + 0x0302003c /* F2 */
>>> + 0x03030006 /* 5 */
>>> + 0x0304003f /* F5 */
>>> + 0x03060007 /* 6 */
>>> + 0x0308000c /* - */
>>> + 0x030b002b /* \ */
>>> +
>>> + 0x04000061 /* R_CTRL */
>>> + 0x0401001e /* A */
>>> + 0x04020020 /* D */
>>> + 0x04030021 /* F */
>>> + 0x0404001f /* S */
>>> + 0x04050025 /* K */
>>> + 0x04060024 /* J */
>>> + 0x04080027 /* ; */
>>> + 0x04090026 /* L */
>>> + 0x040a002b /* \ */
>>> + 0x040b001c /* ENTER */
>>> +
>>> + 0x0501002c /* Z */
>>> + 0x0502002e /* C */
>>> + 0x0503002f /* V */
>>> + 0x0504002d /* X */
>>> + 0x05050033 /* , */
>>> + 0x05060032 /* M */
>>> + 0x0507002a /* L_SHIFT */
>>> + 0x05080035 /* / */
>>> + 0x05090034 /* . */
>>> + 0x050B0039 /* SPACE */
>>> +
>>> + 0x06010002 /* 1 */
>>> + 0x06020004 /* 3 */
>>> + 0x06030005 /* 4 */
>>> + 0x06040003 /* 2 */
>>> + 0x06050009 /* 8 */
>>> + 0x06060008 /* 7 */
>>> + 0x0608000b /* 0 */
>>> + 0x0609000a /* 9 */
>>> + 0x060a0038 /* L_ALT */
>>> + 0x060b006c /* DOWN */
>>> + 0x060c006a /* RIGHT */
>>> +
>>> + 0x07010010 /* Q */
>>> + 0x07020012 /* E */
>>> + 0x07030013 /* R */
>>> + 0x07040011 /* W */
>>> + 0x07050017 /* I */
>>> + 0x07060016 /* U */
>>> + 0x07070036 /* R_SHIFT */
>>> + 0x07080019 /* P */
>>> + 0x07090018 /* O */
>>> + 0x070b0067 /* UP */
>>> + 0x070c0069 /* LEFT */
>>> + >;
>>> + };
>>> + };
>>> +
>>> + power-regulator {
>>> + compatible = "ti,tps65090";
>>
>> I doubt tps65090 will "just work". Does it?
>
> Good question. How to tell? :) Not familiar with clocks and regulators.
> I don't see the nodes referenced anywhere, so I could just try to drop
> (as I would, as per my cover letter, propose for anything non-essential
> that turns controversial).

What does "dmesg | grep tps65090" say?

What does this show:
grep "" /sys/class/regulator/*/name


> If we drop tps65090, can we safely drop vbat-fixed-regulator as well?

Yes


>> On spring the tps65090 is not directly on the same i2c bus as the EC.
>> It's actually hidden behind the EC.
>>
>> Locally in the ChromeOS tree there appears to be a forked copy of the
>> 65090 regulator driver that's in use just for spring. See this from
>> the ChromeOS 3.8 tree:
>>
>> ./drivers/regulator/tps65090-regulator.c
>> ./drivers/regulator/cros_ec-tps65090.c
>>
>> The Spring version of the driver sends EC commands directly to access
>> the tps65090.
>>
>> It is possible (untested) that you could also talk to tps65090 over an
>> i2c tunnel. On exynos5420-peach-pit we have a full fledged i2c
>> tunnel, but you may be able to extend the tunnel to export an i2c
>> tunnel for spring using something like
>> <https://chromium-review.googlesource.com/66116>
>
> The SBS battery thingy (not in this patch) should also be behind some
> tunnel. There's none defined in -cros-common.dtsi or in my patch, and
> still it shows up in dmesg to my surprise, complaining "Couldn't read
> remote-bus property".

Might be due to the cros5250-common. ...but yes, the battery should
be behind the tunnel too and the patches needed for Spring haven't
been posted by anyone yet. I picked up a whole bunch of cros_ec
cleanup patches and thought that the tunnel patches for spring could
possible go up after those land.


>>> + reg = <0x48>;
>>> +
>>> + /*
>>> + * Config irq to disable internal pulls
>>> + * even though we run in polling mode.
>>> + */
>>> + pinctrl-names = "default";
>>> + pinctrl-0 = <&tps65090_irq>;
>>> +
>>> + vsys1-supply = <&vbat>;
>>> + vsys2-supply = <&vbat>;
>>> + vsys3-supply = <&vbat>;
>>> + infet1-supply = <&vbat>;
>>> + infet2-supply = <&vbat>;
>>> + infet3-supply = <&vbat>;
>>> + infet4-supply = <&vbat>;
>>> + infet5-supply = <&vbat>;
>>> + infet6-supply = <&vbat>;
>>> + infet7-supply = <&vbat>;
>>> + vsys-l1-supply = <&vbat>;
>>> + vsys-l2-supply = <&vbat>;
>>> +
>>> + regulators {
>>> + fet1 {
>>> + regulator-name = "vcd_led";
>>> + regulator-min-microvolt = <12000000>;
>>> + regulator-max-microvolt = <12000000>;
>>> + };
>>> + fet3 {
>>> + regulator-name = "wwan_r";
>>> + regulator-min-microvolt = <3300000>;
>>> + regulator-max-microvolt = <3300000>;
>>> + regulator-always-on;
>>> + };
>>> + fet5 {
>>> + regulator-name = "cam";
>>> + regulator-min-microvolt = <3300000>;
>>> + regulator-max-microvolt = <3300000>;
>>> + regulator-always-on;
>>> + };
>>> + fet6 {
>>> + regulator-name = "lcd_vdd";
>>> + regulator-min-microvolt = <3300000>;
>>> + regulator-max-microvolt = <3300000>;
>>> + };
>>> + fet7 {
>>> + regulator-name = "ts";
>>> + regulator-min-microvolt = <5000000>;
>>> + regulator-max-microvolt = <5000000>;
>>> + };
>>> + };
>>> +
>>> + charger {
>>> + compatible = "ti,tps65090-charger";
>>> + };
>>> + };
>>> + };
>>> +
>>> + hdmi {
>>> + hdmi-en-supply = <&s5m_ldo8_reg>;
>>> + vdd-supply = <&s5m_ldo8_reg>;
>>> + vdd_osc-supply = <&s5m_ldo10_reg>;
>>> + vdd_pll-supply = <&s5m_ldo8_reg>;
>>> + };
>>> +
>>> + fimd@14400000 {
>>> + status = "okay";
>>> + samsung,invert-vclk;
>>> + };
>>> +
>>> + dp-controller@145B0000 {
>>> + status = "okay";
>>> + pinctrl-names = "default";
>>> + pinctrl-0 = <&dp_hpd>;
>>
>> This is probably not right. It looks as if spring uses gpc3-0 for
>> display port HPD (as a GPIO). The upstream has this in the
>> exynos5250-pinctrl.dtsi as a different pin.
>>
>> I think you'll need to define your own pinctrl here.
>>
>>
>>> + samsung,color-space = <0>;
>>> + samsung,dynamic-range = <0>;
>>> + samsung,ycbcr-coeff = <0>;
>>> + samsung,color-depth = <1>;
>>> + samsung,link-rate = <0x0a>;
>>> + samsung,lane-count = <1>;
>>> + samsung,hpd-gpio = <&gpc3 0 0>;
>>> +
>>> + display-timings {
>>> + native-mode = <&timing1>;
>>> +
>>> + timing1: timing@1 {
>>> + clock-frequency = <70589280>;
>>> + hactive = <1366>;
>>> + vactive = <768>;
>>> + hfront-porch = <40>;
>>> + hback-porch = <40>;
>>> + hsync-len = <32>;
>>> + vback-porch = <10>;
>>> + vfront-porch = <12>;
>>> + vsync-len = <6>;
>>> + };
>>> + };
>>> + };
>>> +
>>> + fixed-rate-clocks {
>>> + xxti {
>>> + compatible = "samsung,clock-xxti";
>>> + clock-frequency = <24000000>;
>>> + };
>>> + };
>>> +};
>
> Will check on the other suggestions.

-Doug
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