From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH v4 4/6] bus: ti-sysc: Add support for software reset Date: Thu, 5 Jul 2018 08:47:58 -0700 Message-ID: <20180705154758.GA112168@atomide.com> References: <20180705142319.19583-1-faiz_abbas@ti.com> <20180705142319.19583-5-faiz_abbas@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20180705142319.19583-5-faiz_abbas@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Faiz Abbas Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, robh+dt@kernel.org, bcousson@baylibre.com, paul@pwsan.com, t-kristo@ti.com, mark.rutland@arm.com List-Id: devicetree@vger.kernel.org * Faiz Abbas [180705 14:24]: > +static int sysc_reset(struct sysc *ddata) > +{ > + int offset = ddata->offsets[SYSC_SYSCONFIG]; > + int val = sysc_read(ddata, offset); Can you please just warn and return early for now if no syss_mask is specified? Otherwise we'll have mysterious errors if somebody leaves out "ti,hwmods" for module types we do not yet support reset for. > + val |= (0x1 << ddata->cap->regbits->srst_shift); > + sysc_write(ddata, offset, val); > + > + /* Poll on reset status */ > + if (ddata->cfg.syss_mask) { > + offset = ddata->offsets[SYSC_SYSSTATUS]; > + > + return readl_poll_timeout(ddata->module_va + offset, val, > + (val & ddata->cfg.syss_mask) == 0x0, > + 100, MAX_MODULE_SOFTRESET_WAIT); > + } > + > + return 0; > +} > + Otherwise looks good to me. Thanks, Tony