linux-kernel - Re: [PATCH 1/2] arm64: dts: exynos7: Add pmic s2mps15 device tree node

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Date:	Mon, 02 Nov 2015 17:28:27 +0530
From:	Alim Akhtar <alim.akhtar@...sung.com>
To:	Javier Martinez Canillas <javier@....samsung.com>,
	linux-samsung-soc@...r.kernel.org
Cc:	k.kozlowski@...sung.com, 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 05:00 PM, Javier Martinez Canillas wrote:
> Hello Alim,
>
> This patch looks mostly good to me, I just have two comments below:
>
> On 11/02/2015 11:04 AM, Alim Akhtar wrote:
>> This patch add pmic (s2mps15) node of espresso board,
>> 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
>>
>>   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>;
>
> Maybe using IRQ_TYPE_NONE instead of 0?
>
Ok will check
>> +		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";
>> +		};
>> +
>> +		regulators {
>> +			ldo1_reg: LDO1 {
>> +				regulator-name = "vdd_ldo1";
>> +				regulator-min-microvolt = <500000>;
>> +				regulator-max-microvolt = <900000>;
>> +				regulator-always-on;
>
> I see that all regulators are marked as regulator-always-on but that will
> prevent the regulator subsystem to disable unused regulators. Can you please
> double check which regulators should really be always on and which ones can
> be disabled if are not used?
>
I kept it on always, as I am still in a process for validating all IPs 
on board. Will see if I can remove some of them, which I feel can be done.
> After those two changes:
>
> Reviewed-by: Javier Martinez Canillas <javier@....samsung.com>
>
Thanks!
> Best regards,
>
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