Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756079AbaGVP4z (ORCPT ); Tue, 22 Jul 2014 11:56:55 -0400 Received: from mail-ig0-f169.google.com ([209.85.213.169]:52078 "EHLO mail-ig0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755830AbaGVP4x (ORCPT ); Tue, 22 Jul 2014 11:56:53 -0400 Date: Tue, 22 Jul 2014 16:56:45 +0100 From: Lee Jones To: Felipe Balbi Cc: Peter Griffin , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, maxime.coquelin@st.com, patrice.chotard@st.com, srinivas.kandagatla@gmail.com, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, linux-omap@vger.kernel.org, peppe.cavallaro@st.com Subject: Re: [PATCH v2 1/3] usb: dwc3: add ST dwc3 glue layer to manage dwc3 HC Message-ID: <20140722155645.GD23210@lee--X1> References: <1404541530-27856-1-git-send-email-peter.griffin@linaro.org> <1404541530-27856-2-git-send-email-peter.griffin@linaro.org> <20140707124627.GG6407@lee--X1> <20140722091800.GB8233@griffinp-ThinkPad-X1-Carbon-2nd> <20140722145711.GC20588@saruman.home> <20140722154503.GC23210@lee--X1> <20140722155117.GF20588@saruman.home> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20140722155117.GF20588@saruman.home> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 22 Jul 2014, Felipe Balbi wrote: > On Tue, Jul 22, 2014 at 04:45:03PM +0100, Lee Jones wrote: > > > > > > +static void st_dwc3_init(struct st_dwc3 *dwc3_data) > > > > > > +{ > > > > > > + u32 reg = st_dwc3_readl(dwc3_data->glue_base, USB2_CLKRST_CTRL); > > > > > > + > > > > > > + reg |= aux_clk_en(1) | ext_cfg_reset_n(1) | xhci_revision(1); > > > > > > + reg &= ~sw_pipew_reset_n(1); > > > > > > > > > > 1? Better to add defines for these magic numbers. What is 1 anyway? > > > > > > > > They are just bit setting macros, I've converted them over to use BIT macro now, > > > > so it no longer takes a parameter. > > > > > > the macros are better, but make them upper case as everybody else. > > > > When you say that the macros are better, what do you mean? > > > > Defines do the job in a manner which is a great deal cleaner: > > > > #define AUX_CLK_EN BIT(0) > > #define SW_PIPEW_RESET_N BIT(4) > > #define EXT_CFG_RESET_N BIT(8) > > #define XHCI_REVISION BIT(12) > > > > reg = AUX_CLK_EN | SW_PIPEW_RESET_N | XHCI_REVISION; > > reg &= ~SW_PIPEW_RESET_N > > this is what I meant ;-) I see what I wrote can be very ambiguous :-p Okay great, thanks for clarifying. :) -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- 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/