linux-kernel - Re: [RFC PATCH 6/6] ARM64: exynos: add the pcie node for TM2

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Date:   Wed, 28 Dec 2016 08:05:52 +0900
From:   Jaehoon Chung <jh80.chung@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        bhelgaas@...gle.com, robh+dt@...nel.org, mark.rutland@....com,
        kgene@...nel.org, javier@....samsung.com, kishon@...com,
        will.deacon@....com, catalin.marinas@....com, cpgs@...sung.com
Subject: Re: [RFC PATCH 6/6] ARM64: exynos: add the pcie node for TM2

On 12/28/2016 01:32 AM, Krzysztof Kozlowski wrote:
> On Mon, Dec 26, 2016 at 02:20:29PM +0900, Jaehoon Chung wrote:
>> Add the Exxynos5433 pcie node for TM2.
>> This pcie device is used for supporting WiFi.
>>
>> And some gpios are already requested from pinctrl. so it doesn't need to
>> initialize.
>> GPJ2-0 is used for supplying to WiFi PCIe chip.
>>
>> Signed-off-by: Jaehoon Chung <jh80.chung@...sung.com>
>> ---
>>  arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi |  7 +++++++
>>  arch/arm64/boot/dts/exynos/exynos5433-tm2.dts      | 11 +++++++++--
>>  arch/arm64/boot/dts/exynos/exynos5433.dtsi         | 23 ++++++++++++++++++++++
>>  3 files changed, 39 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi
>> index ad71247..3e8b728 100644
>> --- a/arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi
>> +++ b/arch/arm64/boot/dts/exynos/exynos5433-pinctrl.dtsi
>> @@ -183,6 +183,13 @@
>>  		interrupt-controller;
>>  		#interrupt-cells = <2>;
>>  	};
>> +
>> +	pcie_wlanen: pcie-wlanen {
>> +		samsung,pins = "gpj2-0";
>> +		samsung,pin-function = <0>;
>> +		samsung,pin-pud = <3>;
>> +		samsung,pin-drv = <3>;
>> +	};
>>  };
>>  
>>  &pinctrl_finger {
>> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
>> index f21bdc2..c84a2ad 100644
>> --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
>> +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
>> @@ -737,6 +737,15 @@
>>  	bus-width = <4>;
>>  };
>>  
>> +&pcie {
>> +	assigned-clocks = <&cmu_fsys CLK_MOUT_SCLK_PCIE_100_USER>,
>> +			<&cmu_top CLK_MOUT_SCLK_PCIE_100>;
>> +	assigned-clock-parents = <&cmu_top CLK_SCLK_PCIE_100_FSYS>,
>> +			<&cmu_top CLK_MOUT_BUS_PLL_USER>;
>> +	assigned-clock-rates = <0>, <100000000>;
>> +	status = "okay";
>> +};
>> +
>>  &pinctrl_alive {
>>  	pinctrl-names = "default";
>>  	pinctrl-0 = <&initial_alive>;
>> @@ -836,7 +845,6 @@
>>  	pinctrl-0 = <&initial_ese>;
>>  
>>  	initial_ese: initial-state {
>> -		PIN(IN, gpj2-0, DOWN, LV1);
>>  		PIN(IN, gpj2-1, DOWN, LV1);
>>  		PIN(IN, gpj2-2, DOWN, LV1);
>>  	};
>> @@ -851,7 +859,6 @@
>>  		PIN(IN, gpr3-1, DOWN, LV1);
>>  		PIN(IN, gpr3-2, DOWN, LV1);
>>  		PIN(IN, gpr3-3, DOWN, LV1);
>> -		PIN(IN, gpr3-7, NONE, LV1);
>>  	};
>>  };
>>  
>> diff --git a/arch/arm64/boot/dts/exynos/exynos5433.dtsi b/arch/arm64/boot/dts/exynos/exynos5433.dtsi
>> index 2a15f18..da287f4 100644
>> --- a/arch/arm64/boot/dts/exynos/exynos5433.dtsi
>> +++ b/arch/arm64/boot/dts/exynos/exynos5433.dtsi
>> @@ -1457,6 +1457,29 @@
>>  			samsung,fsys-sysreg = <&syscon_fsys>;
>>  			status = "okay";
>>  		};
>> +
>> +		pcie: pcie@...00000 {
>> +			compatible = "samsung,exynos5433-pcie", "snps,dw-pcie";
>> +			#address-cells = <3>;
>> +			#size-cells = <2>;
>> +			device_type = "pci";
>> +			interrupts = <GIC_SPI 245 IRQ_TYPE_LEVEL_HIGH>;
>> +			interrupt-names = "intr";
>> +			clocks = <&cmu_fsys CLK_PCIE>,
>> +			       <&cmu_fsys CLK_PCLK_PCIE_PHY>;
> 
> Here and in the 'reg' property - indentation looks weird. Tabs+spaces
> but not aligned. Either you use spaces to align... or just don't care
> and use tabs. I prefer consistency and below the 'ranges' property is
> aligned.

Will fix.

> 
>> +			clock-names = "pcie", "pcie_bus";
>> +			num-lanes = <1>;
>> +			pinctrl-names = "default";
>> +			phys = <&pcie_phy>;
>> +			phy-names = "pcie-phy";
>> +			pinctrl-0 = <&pcie_bus &pcie_wlanen>;
>> +			reg = <0x156b0000 0x1000>, <0x15700000 0x1000>,
>> +			    <0x0c000000 0x1000>;
>> +			reg-names = "elbi", "dbi", "config";
> 
> This does not match the bindings documentation.

This is right. Bindings documentation is wrong. :)

And I will put the prefix as "dts" on subject, according to your other comment.

Best Regards,
Jaehoon Chung

> 
> Best regards,
> Krzysztof
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