Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933825AbaLKGab (ORCPT ); Thu, 11 Dec 2014 01:30:31 -0500 Received: from comal.ext.ti.com ([198.47.26.152]:41182 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933440AbaLKGaa (ORCPT ); Thu, 11 Dec 2014 01:30:30 -0500 Message-ID: <54893963.7060304@ti.com> Date: Thu, 11 Dec 2014 11:57:47 +0530 From: Kishon Vijay Abraham I User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 MIME-Version: 1.0 To: Joe Perches CC: Yunzhi Li , , , , , , , , , Grant Likely , Rob Herring , , , Subject: Re: [PATCH v5 1/5] phy: add a driver for the Rockchip SoC internal USB2.0 PHY References: <1418208371-18851-1-git-send-email-lyz@rock-chips.com> <1418208371-18851-2-git-send-email-lyz@rock-chips.com> <5489338C.1030109@ti.com> <1418278322.18092.30.camel@perches.com> In-Reply-To: <1418278322.18092.30.camel@perches.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Thursday 11 December 2014 11:42 AM, Joe Perches wrote: > On Thu, 2014-12-11 at 11:32 +0530, Kishon Vijay Abraham I wrote: >> On Wednesday 10 December 2014 04:16 PM, Yunzhi Li wrote: >>> diff --git a/drivers/phy/phy-rockchip-usb.c b/drivers/phy/phy-rockchip-usb.c > [] >>> +/* >>> + * The higher 16-bit of this register is used for write protection >>> + * only if BIT(13 + 16) set to 1 the BIT(13) can be written. >>> + */ >>> +#define SIDDQ_MSK BIT(13 + 16) > > huh? > > This #define looks _very_ odd. > > Is this supposed to be a single bit 29 or > some range? >From what I understood, the most significant 16 bits are write locks to the least significant 16 bits. So If I have to write something on bit 0, I have to set bit 16. If I have to write something on bit 1, I have to set bit 17. If I have to write something on bit 2, I have to set bit 18. and so on. 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/