linux-kernel - Re: [PATCH v2 01/11] phy: exynos-ufs: add UFS PHY driver for EXYNOS SoC

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Message-id: <560CB74E.7070909@samsung.com>
Date:	Thu, 01 Oct 2015 10:02:14 +0530
From:	Alim Akhtar <alim.akhtar@...sung.com>
To:	Rob Herring <robh@...nel.org>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	JBottomley@...n.com, vinholikatti@...il.com,
	amit.daniel@...sung.com, essuuj@...il.com,
	devicetree@...r.kernel.org, Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH v2 01/11] phy: exynos-ufs: add UFS PHY driver for EXYNOS SoC

HI Rob,
Thanks for your time.

On 09/21/2015 08:03 PM, Rob Herring wrote:
> On 09/17/2015 04:45 AM, Alim Akhtar wrote:
>> From: Seungwon Jeon <essuuj@...il.com>
>>
>> This patch introduces Exynos UFS PHY driver. This driver
>> supports to deal with phy calibration and power control
>> according to UFS host driver's behavior.
>>
>> Signed-off-by: Seungwon Jeon <essuuj@...il.com>
>> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
>> Cc: Kishon Vijay Abraham I <kishon@...com>
>> ---
>>   .../devicetree/bindings/phy/samsung-phy.txt        |   22 ++
>
> It is preferred to put the binding in a separate patch.
>
Ok, will make a separate patch to add bindings.
>>   drivers/phy/Kconfig                                |    7 +
>>   drivers/phy/Makefile                               |    1 +
>>   drivers/phy/phy-exynos-ufs.c                       |  262 ++++++++++++++++++++
>>   drivers/phy/phy-exynos-ufs.h                       |   85 +++++++
>>   drivers/phy/phy-exynos7-ufs.h                      |   89 +++++++
>>   include/linux/phy/phy-exynos-ufs.h                 |  107 ++++++++
>>   7 files changed, 573 insertions(+)
>>   create mode 100644 drivers/phy/phy-exynos-ufs.c
>>   create mode 100644 drivers/phy/phy-exynos-ufs.h
>>   create mode 100644 drivers/phy/phy-exynos7-ufs.h
>>   create mode 100644 include/linux/phy/phy-exynos-ufs.h
>>
>> diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt
>> index 60c6f2a..1abe2c4 100644
>> --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt
>> +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt
>> @@ -174,3 +174,25 @@ Example:
>>   		usbdrdphy0 = &usb3_phy0;
>>   		usbdrdphy1 = &usb3_phy1;
>>   	};
>> +
>> +Samsung Exynos7 soc serise UFS PHY Controller
>
> s/serise/series/
>
ok

>> +---------------------------------------------
>> +
>> +UFS PHY nodes are defined to describe on-chip UFS Physical layer controllers.
>> +Each UFS PHY controller should have its own node.
>> +
>> +Required properties:
>> +- compatible        : compatible list, contains "samsung,exynos7-ufs-phy"
>> +- reg : offset and length of the UFS PHY register set;
>> +- reg-names : reg name(s) must be 'phy-pma';
>> +- #phy-cells : must be zero
>> +- samsung,syscon-phandle : a phandle to the PMU system controller, no arguments
>
> How about samsung,pmu-syscon as syscon can mean a variety of things?
>
agree, will change it.
>> +
>> +Example:
>> +	ufs_phy: ufs-phy@...5571800 {
>> +		compatible = "samsung,exynos7-ufs-phy";
>> +		reg = <0x15571800 0x240>;
>> +		reg-names = "phy-pma";
>> +		samsung,syscon-phandle = <&pmu_system_controller>;
>> +		#phy-cells = <0>;
>> +	};
>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>> index 6b8dd16..7449376 100644
>> --- a/drivers/phy/Kconfig
>> +++ b/drivers/phy/Kconfig
>> @@ -358,4 +358,11 @@ config PHY_BRCMSTB_SATA
>>   	  Enable this to support the SATA3 PHY on 28nm Broadcom STB SoCs.
>>   	  Likely useful only with CONFIG_SATA_BRCMSTB enabled.
>>
>> +config PHY_EXYNOS_UFS
>> +	tristate "EXYNOS SoC series UFS PHY driver"
>> +	depends on OF && ARCH_EXYNOS
>
> || COMPILE_TEST
>
ok will add
>> +	select GENERIC_PHY
>> +	help
>> +	  Support for UFS PHY on Samsung EXYNOS chipsets.
>> +
>>   endmenu
>
>
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