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Message-id: <56375EB1.2090504@samsung.com>
Date: Mon, 02 Nov 2015 18:31:37 +0530
From: Alim Akhtar <alim.akhtar@...sung.com>
To: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc: linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
kgene@...nel.org
Subject: Re: [PATCH 1/2] arm64: dts: exynos7: Add pmic s2mps15 device tree node
On 11/02/2015 05:55 PM, Krzysztof Kozlowski wrote:
> 2015-11-02 19:04 GMT+09:00 Alim Akhtar <alim.akhtar@...sung.com>:
>> This patch add pmic (s2mps15) node of espresso board,
>
> This patch adds PMIC (S2MPS15)...
>
>> which includes addition of regulators and pmic-clk sub-nodes.
>>
>> Signed-off-by: Abhilash Kesavan <a.kesavan@...sung.com>
>> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
>> ---
>> This patch should go in after driver side changes [1] lands.
>> [1]-> https://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg47736.html
>
> Eh? Why? Usually there is not such requirement.
>
Got it, I just thought without driver changes these dts modification
does not make sense. Thanks for clarification.
>>
>> arch/arm64/boot/dts/exynos/exynos7-espresso.dts | 349 +++++++++++++++++++++++
>> 1 file changed, 349 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
>> index 838a3626dac1..8ce04a0ec928 100644
>> --- a/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
>> +++ b/arch/arm64/boot/dts/exynos/exynos7-espresso.dts
>> @@ -53,6 +53,355 @@
>> status = "okay";
>> };
>>
>> +&hsi2c_4 {
>> + samsung,i2c-sda-delay = <100>;
>> + samsung,i2c-max-bus-freq = <200000>;
>> + status = "okay";
>> +
>> + s2mps15_pmic@66 {
>> + compatible = "samsung,s2mps15-pmic";
>> + reg = <0x66>;
>> + interrupts = <2 0>;
>> + interrupt-parent = <&gpa0>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pmic_irq>;
>> + wakeup-source;
>> +
>> + s2mps15_osc: clocks {
>> + compatible = "samsung,s2mps13-clk";
>> + #clock-cells = <1>;
>> + clock-output-names = "s2mps13_ap", "s2mps13_cp",
>> + "s2mps13_bt";
>> + };
>
> Don't you want to use one of these clocks for s3c-rtc (&rtc node)?
>
yes, you are right, rtc on this board is currently broken, mainly
because of the introduction of rtc_src clock in the s3c-rtc driver.
That is on my do list next. will take a look.
Are you suggesting to remove this -clk node now and add along with rtc
changes? I feel this should go in along with this patch.
>> +
>> + regulators {
>> + ldo1_reg: LDO1 {
>> + regulator-name = "vdd_ldo1";
>> + regulator-min-microvolt = <500000>;
>> + regulator-max-microvolt = <900000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo2_reg: LDO2 {
>> + regulator-name = "vdd_ldo2";
>> + regulator-min-microvolt = <1620000>;
>> + regulator-max-microvolt = <3300000>;
>> + regulator-enable-ramp-delay = <125>;
>> + regulator-always-on;
>> + };
>> +
>> + ldo3_reg: LDO3 {
>> + regulator-name = "vdd_ldo3";
>> + regulator-min-microvolt = <1620000>;
>> + regulator-max-microvolt = <1980000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo4_reg: LDO4 {
>> + regulator-name = "vdd_ldo4";
>> + regulator-min-microvolt = <800000>;
>> + regulator-max-microvolt = <1110000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo5_reg: LDO5 {
>> + regulator-name = "vdd_ldo5";
>> + regulator-min-microvolt = <1620000>;
>> + regulator-max-microvolt = <1980000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo6_reg: LDO6 {
>> + regulator-name = "vdd_ldo6";
>> + regulator-min-microvolt = <2250000>;
>> + regulator-max-microvolt = <3300000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo7_reg: LDO7 {
>> + regulator-name = "vdd_ldo7";
>> + regulator-min-microvolt = <700000>;
>> + regulator-max-microvolt = <1150000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo8_reg: LDO8 {
>> + regulator-name = "vdd_ldo8";
>> + regulator-min-microvolt = <700000>;
>> + regulator-max-microvolt = <1000000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo9_reg: LDO9 {
>> + regulator-name = "vdd_ldo9";
>> + regulator-min-microvolt = <700000>;
>> + regulator-max-microvolt = <1000000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo10_reg: LDO10 {
>> + regulator-name = "vdd_ldo10";
>> + regulator-min-microvolt = <700000>;
>> + regulator-max-microvolt = <1000000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo11_reg: LDO11 {
>> + regulator-name = "vdd_ldo11";
>> + regulator-min-microvolt = <1000000>;
>> + regulator-max-microvolt = <1300000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo12_reg: LDO12 {
>> + regulator-name = "vdd_ldo12";
>> + regulator-min-microvolt = <1000000>;
>> + regulator-max-microvolt = <1300000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo13_reg: LDO13 {
>> + regulator-name = "vdd_ldo13";
>> + regulator-min-microvolt = <1000000>;
>> + regulator-max-microvolt = <1300000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo14_reg: LDO14 {
>> + regulator-name = "vdd_ldo14";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <3375000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo15_reg: LDO15 {
>> + regulator-name = "vdd_ldo15";
>> + regulator-min-microvolt = <1500000>;
>> + regulator-max-microvolt = <2275000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo16_reg: LDO16 {
>> + regulator-name = "vdd_ldo16";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <1800000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo17_reg: LDO17 {
>> + regulator-name = "vdd_ldo17";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <3375000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo18_reg: LDO18 {
>> + regulator-name = "vdd_ldo18";
>> + regulator-min-microvolt = <1500000>;
>> + regulator-max-microvolt = <2275000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo19_reg: LDO19 {
>> + regulator-name = "vdd_ldo19";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <3375000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo20_reg: LDO20 {
>> + regulator-name = "vdd_ldo20";
>> + regulator-min-microvolt = <1500000>;
>> + regulator-max-microvolt = <2275000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo21_reg: LDO21 {
>> + regulator-name = "vdd_ldo21";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <3375000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo22_reg: LDO22 {
>> + regulator-name = "vdd_ldo22";
>> + regulator-min-microvolt = <1200000>;
>> + regulator-max-microvolt = <1200000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo23_reg: LDO23 {
>> + regulator-name = "vdd_ldo23";
>> + regulator-min-microvolt = <1500000>;
>> + regulator-max-microvolt = <2275000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo24_reg: LDO24 {
>> + regulator-name = "vdd_ldo24";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <3375000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo25_reg: LDO25 {
>> + regulator-name = "vdd_ldo25";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <3375000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo26_reg: LDO26 {
>> + regulator-name = "vdd_ldo26";
>> + regulator-min-microvolt = <700000>;
>> + regulator-max-microvolt = <1470000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + ldo27_reg: LDO27 {
>> + regulator-name = "vdd_ldo27";
>> + regulator-min-microvolt = <1500000>;
>> + regulator-max-microvolt = <2275000>;
>> + regulator-always-on;
>> + regulator-enable-ramp-delay = <125>;
>> + };
>> +
>> + buck1_reg: BUCK1 {
>> + regulator-name = "vdd_mif";
>> + regulator-min-microvolt = <500000>;
>> + regulator-max-microvolt = <1200000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-ramp-delay = <25000>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck2_reg: BUCK2 {
>> + regulator-name = "vdd_atlas";
>> + regulator-min-microvolt = <1200000>;
>> + regulator-max-microvolt = <1200000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-ramp-delay = <12500>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck3_reg: BUCK3 {
>> + regulator-name = "vdd_apollo";
>> + regulator-min-microvolt = <1200000>;
>> + regulator-max-microvolt = <1200000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-ramp-delay = <12500>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck4_reg: BUCK4 {
>> + regulator-name = "vdd_int";
>> + regulator-min-microvolt = <500000>;
>> + regulator-max-microvolt = <1200000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-ramp-delay = <12500>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck5_reg: BUCK5 {
>> + regulator-name = "vdd_buck5";
>> + regulator-min-microvolt = <500000>;
>> + regulator-max-microvolt = <1300000>;
>> + regulator-always-on;
>> + regulator-ramp-delay = <25000>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck6_reg: BUCK6 {
>> + regulator-name = "vdd_g3d";
>> + regulator-min-microvolt = <500000>;
>> + regulator-max-microvolt = <1400000>;
>> + regulator-always-on;
>> + regulator-ramp-delay = <12500>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck7_reg: BUCK7 {
>> + regulator-name = "vdd_buck7";
>> + regulator-min-microvolt = <1000000>;
>> + regulator-max-microvolt = <1500000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-ramp-delay = <25000>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck8_reg: BUCK8 {
>> + regulator-name = "vdd_buck8";
>> + regulator-min-microvolt = <1000000>;
>> + regulator-max-microvolt = <1500000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-ramp-delay = <25000>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck9_reg: BUCK9 {
>> + regulator-name = "vdd_buck9";
>> + regulator-min-microvolt = <1800000>;
>> + regulator-max-microvolt = <2100000>;
>> + regulator-always-on;
>> + regulator-boot-on;
>> + regulator-ramp-delay = <25000>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>> +
>> + buck10_reg: BUCK10 {
>> + regulator-name = "vdd_buck10";
>> + regulator-min-microvolt = <1000000>;
>> + regulator-max-microvolt = <3000000>;
>> + regulator-boot-on;
>> + regulator-always-on;
>> + regulator-ramp-delay = <25000>;
>> + regulator-enable-ramp-delay = <250>;
>> + };
>
> All of these ldo3 and bucks in vendor tree for Espresso board have
> ramp delay of 12000. Also they don't have enable-ramp-delay set and
> voltages sometimes differ. I don't have S2MPS15 datasheet so I don't
> know what is the true value... I'll leave it up to you but it looks
> suspicious.
>
These values generally comes from our board design team, so I cann't
really comment on that, it may vary from board revision etc.
I will check if we have any updated version of recommended value and
update accordingly.
>> + };
>> + };
>> +};
>
> What will be the benefit of defining all of these regulators if they
> are always on and without consumers? No one will disable them, no one
> will change the voltage. Please provide some consumers.
>
As many drivers are not yet enabled in arm64 defconfig, that is one of
the reason why we are not seeing many consumer for these nodes.
This is the ground work being done for enabling those. If you insist
will try to reduce what is being used now. Moreover this was used to
verify functionality of pmic driver as well.
> Best regards,
> Krzysztof
>
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