Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754999AbaDNNAS (ORCPT ); Mon, 14 Apr 2014 09:00:18 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:38182 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753786AbaDNNAN (ORCPT ); Mon, 14 Apr 2014 09:00:13 -0400 Message-ID: <534BDBBC.5010701@ti.com> Date: Mon, 14 Apr 2014 18:29:40 +0530 From: Kishon Vijay Abraham I User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Vivek Gautam CC: Linux USB Mailing List , "linux-samsung-soc@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , , Greg KH , Felipe Balbi , Kukjin Kim , Tomasz Figa , Kamil Debski , Jingoo Han , Sylwester Nawrocki Subject: Re: [PATCH V4 1/5] phy: Add new Exynos5 USB 3.0 PHY driver References: <1396967803-28868-1-git-send-email-gautam.vivek@samsung.com> <1396967803-28868-2-git-send-email-gautam.vivek@samsung.com> <534BD447.1080909@ti.com> In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Monday 14 April 2014 06:12 PM, Vivek Gautam wrote: > Hi, > > > On Mon, Apr 14, 2014 at 5:57 PM, Kishon Vijay Abraham I wrote: >> Hi, >> >> On Tuesday 08 April 2014 08:06 PM, Vivek Gautam wrote: >>> Add a new driver for the USB 3.0 PHY on Exynos5 series of SoCs. >>> The new driver uses the generic PHY framework and will interact >>> with DWC3 controller present on Exynos5 series of SoCs. >>> Thereby, removing old phy-samsung-usb3 driver and related code >>> used untill now which was based on usb/phy framework. >>> >>> Signed-off-by: Vivek Gautam >>> --- >>> .../devicetree/bindings/phy/samsung-phy.txt | 42 ++ >>> drivers/phy/Kconfig | 11 + >>> drivers/phy/Makefile | 1 + >>> drivers/phy/phy-exynos5-usbdrd.c | 668 ++++++++++++++++++++ >>> 4 files changed, 722 insertions(+) >>> create mode 100644 drivers/phy/phy-exynos5-usbdrd.c >>> >>> diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt >>> index 28f9edb..6d99ba9 100644 >>> --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt >>> +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt >>> @@ -74,3 +74,45 @@ phy-consumer@12340000 { >>> >>> Refer to DT bindings documentation of particular PHY consumer devices for more >>> information about required PHYs and the way of specification. >>> + >>> +Samsung Exynos5 SoC series USB DRD PHY controller >>> +-------------------------------------------------- >>> + >>> +Required properties: >>> +- compatible : Should be set to one of the following supported values: >>> + - "samsung,exynos5250-usbdrd-phy" - for exynos5250 SoC, >>> + - "samsung,exynos5420-usbdrd-phy" - for exynos5420 SoC. >>> +- reg : Register offset and length of USB DRD PHY register set; >>> +- clocks: Clock IDs array as required by the controller >>> +- clock-names: names of clocks correseponding to IDs in the clock property; >>> + Required clocks: >>> + - phy: main PHY clock (same as USB DRD controller i.e. DWC3 IP clock), >>> + used for register access. >>> + - ref: PHY's reference clock (usually crystal clock), associated by >>> + phy name, used to determine bit values for clock settings >>> + register. >>> + Additional clock required for Exynos5420: >>> + - usb30_sclk_100m: Additional special clock used for PHY operation >>> + depicted as 'sclk_usbphy30' in CMU of Exynos5420. >>> +- samsung,syscon-phandle: phandle for syscon interface, which is used to >>> + control pmu registers for power isolation. >>> +- samsung,pmu-offset: phy power control register offset to pmu-system-controller >>> + base. >>> +- #phy-cells : from the generic PHY bindings, must be 1; >>> + >>> +For "samsung,exynos5250-usbdrd-phy" and "samsung,exynos5420-usbdrd-phy" >>> +compatible PHYs, the second cell in the PHY specifier identifies the >>> +PHY id, which is interpreted as follows: >>> + 0 - UTMI+ type phy, >>> + 1 - PIPE3 type phy, >>> + >>> +Example: >>> + usb3_phy: usbphy@12100000 { >>> + compatible = "samsung,exynos5250-usbdrd-phy"; >>> + reg = <0x12100000 0x100>; >>> + clocks = <&clock 286>, <&clock 1>; >>> + clock-names = "phy", "usb3phy_refclk"; >>> + samsung,syscon-phandle = <&pmu_syscon>; >>> + samsung,pmu-offset = <0x704>; >>> + #phy-cells = <1>; >>> + }; >>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig >>> index 8d3c49c..d955a05 100644 >>> --- a/drivers/phy/Kconfig >>> +++ b/drivers/phy/Kconfig >>> @@ -166,4 +166,15 @@ config PHY_XGENE >>> help >>> This option enables support for APM X-Gene SoC multi-purpose PHY. >>> >>> +config PHY_EXYNOS5_USBDRD >>> + tristate "Exynos5 SoC series USB DRD PHY driver" >>> + depends on ARCH_EXYNOS5 && OF >>> + depends on HAS_IOMEM >>> + select GENERIC_PHY >>> + select MFD_SYSCON >> >> Lets try to avoid select in Kconfig. We've got enough problems with that. > > I hope you meant with "select MFD_SYSCON". > We are referencing the syscon for accessing pmu reg, for which we need > this config to be selected. > Other Exynos phy drivers also need this config and for that they have > selected this. > > Do you want me to do it any other way ? depends on is one option. Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/