Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753121AbbGNDYG (ORCPT ); Mon, 13 Jul 2015 23:24:06 -0400 Received: from mail-yk0-f175.google.com ([209.85.160.175]:35290 "EHLO mail-yk0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751231AbbGNDYC (ORCPT ); Mon, 13 Jul 2015 23:24:02 -0400 MIME-Version: 1.0 In-Reply-To: <1436841935.9416.10.camel@mtksdaap41> References: <1436522405-13923-1-git-send-email-jamesjj.liao@mediatek.com> <1436522405-13923-5-git-send-email-jamesjj.liao@mediatek.com> <1436841935.9416.10.camel@mtksdaap41> From: Daniel Kurtz Date: Tue, 14 Jul 2015 11:23:41 +0800 X-Google-Sender-Auth: OiJXQIWqbMCoSO-7WdXxlXxo8RI Message-ID: Subject: Re: [PATCH v3 4/5] clk: mediatek: Add USB clock support in MT8173 APMIXEDSYS To: James Liao Cc: Matthias Brugger , Mike Turquette , Stephen Boyd , Heiko Stubner , srv_heupstream , Ricky Liang , Rob Herring , Sascha Hauer , "open list:OPEN FIRMWARE AND..." , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , linux-mediatek@lists.infradead.org Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4299 Lines: 127 On Tue, Jul 14, 2015 at 10:45 AM, James Liao wrote: > Hi Daniel, > > On Mon, 2015-07-13 at 22:46 +0800, Daniel Kurtz wrote: > >> > +static const struct clk_ops mtk_ref2usb_tx_ops = { >> > + .is_prepared = mtk_ref2usb_tx_is_prepared, >> > + .prepare = mtk_ref2usb_tx_prepare, >> > + .unprepare = mtk_ref2usb_tx_unprepare, >> > +}; >> >> Burying the implementation of this special "mtk_ref2usb" clock in >> clk-mt8173,c seems a bit awkward. >> Can you please move it to its own file, like mediatek/clk-usb.c? > > Do you mean clk/mediatek/clk-usb.c? > > This clock is a MT8173 specific clock, which may not be reused by other > SoCs. So I think it's not necessary to move it to a separated file. Yes, this is a wrapper for a type of clock. I think it would be better in its own file, rather than embedded in clk-mt8173.c, which is more about enumerating and initializing the clock tree. Perhaps today it is only used for mt8173, but that may not be the case in the future. -Dan > >> > + >> > +static struct clk *mtk_clk_register_ref2usb_tx(const char *name, >> > + const char *parent_name, void __iomem *reg) >> > +{ >> > + struct mtk_ref2usb_tx *tx; >> > + struct clk_init_data init = {}; >> > + struct clk *clk; >> > + >> > + tx = kzalloc(sizeof(*tx), GFP_KERNEL); >> > + if (!tx) >> > + return ERR_PTR(-ENOMEM); >> > + >> > + tx->base_addr = reg; >> > + tx->hw.init = &init; >> > + >> > + init.name = name; >> > + init.ops = &mtk_ref2usb_tx_ops; >> > + init.parent_names = &parent_name; >> > + init.num_parents = 1; >> > + >> > + clk = clk_register(NULL, &tx->hw); >> > + >> > + if (IS_ERR(clk)) { >> > + pr_err("Failed to register clk %s: %ld\n", name, PTR_ERR(clk)); >> > + kfree(tx); >> > + } >> > + >> > + return clk; >> > +} >> > + >> > +struct mtk_apmixed_ex { >> > + int id; >> > + const char *name; >> > + const char *parent; >> > + u32 reg_ofs; >> > +}; >> > + >> > +#define APMIXED_EX(_id, _name, _parent, _reg_ofs) { \ >> > + .id = _id, \ >> > + .name = _name, \ >> > + .parent = _parent, \ >> > + .reg_ofs = _reg_ofs, \ >> > + } >> > + >> > +static const struct mtk_apmixed_ex apmixed_ex[] = { >> >> __initconst > > OK. I'll fix it in next patch. > >> > + APMIXED_EX(CLK_APMIXED_REF2USB_TX, "ref2usb_tx", "clk26m", 0x8), >> > +}; >> > + >> > +static void __init mtk_clk_register_apmixedsys_special(struct device_node *node, >> > + struct clk_onecell_data *clk_data) >> > +{ >> > + void __iomem *base; >> > + struct clk *clk; >> > + int i; >> > + >> > + base = of_iomap(node, 0); >> > + if (!base) { >> > + pr_err("%s(): ioremap failed\n", __func__); >> > + return; >> > + } >> > + >> > + for (i = 0; i < ARRAY_SIZE(apmixed_ex); i++) { >> > + const struct mtk_apmixed_ex *ape = &apmixed_ex[i]; >> > + >> > + clk = mtk_clk_register_ref2usb_tx(ape->name, ape->parent, >> > + base + ape->reg_ofs); >> > + >> > + if (IS_ERR(clk)) { >> > + pr_err("Failed to register clk %s: %ld\n", ape->name, >> > + PTR_ERR(clk)); >> > + continue; >> > + } >> > + >> > + clk_data->clks[CLK_APMIXED_REF2USB_TX] = clk; >> >> This works assuming ARRAY_SIZE(apmixed_ex) == 1. >> Either remove the loop since it is unnecessary, or do: >> clk_data->clks[ape->id] = clk; > > It should be "clk_data->clks[ape->id] = clk". I'll fix it in next patch. > > > Best regards, > > James > -- 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/