Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752180AbaBXCKG (ORCPT ); Sun, 23 Feb 2014 21:10:06 -0500 Received: from mail-la0-f41.google.com ([209.85.215.41]:34575 "EHLO mail-la0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752000AbaBXCJw (ORCPT ); Sun, 23 Feb 2014 21:09:52 -0500 MIME-Version: 1.0 In-Reply-To: References: <1392907779-22053-1-git-send-email-geert@linux-m68k.org> <1392907779-22053-5-git-send-email-geert@linux-m68k.org> Date: Mon, 24 Feb 2014 11:09:50 +0900 Message-ID: Subject: Re: [PATCH 04/11] ARM: shmobile: lager legacy: Add MSIOF support From: Magnus Damm To: Geert Uytterhoeven Cc: Simon Horman , SH-Linux , "linux-arm-kernel@lists.infradead.org" , linux-kernel , Geert Uytterhoeven Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Geert, On Fri, Feb 21, 2014 at 1:18 AM, Geert Uytterhoeven wrote: > Hi Magnus, > > On Thu, Feb 20, 2014 at 4:48 PM, Magnus Damm wrote: >>> +/* MSIOF */ >>> +static const struct resource sh_msiof0_resources[] __initconst = { >>> + DEFINE_RES_MEM(0xe6e20000, 0x0064), >>> + DEFINE_RES_IRQ(gic_spi(156)), >>> +}; >>> + >>> +static const struct resource sh_msiof1_resources[] __initconst = { >>> + DEFINE_RES_MEM(0xe6e10000, 0x0064), >>> + DEFINE_RES_IRQ(gic_spi(157)), >>> +}; >>> + >>> +static const struct resource sh_msiof2_resources[] __initconst = { >>> + DEFINE_RES_MEM(0xe6e00000, 0x0064), >>> + DEFINE_RES_IRQ(gic_spi(158)), >>> +}; >>> + >>> +static const struct resource sh_msiof3_resources[] __initconst = { >>> + DEFINE_RES_MEM(0xe6c90000, 0x0064), >>> + DEFINE_RES_IRQ(gic_spi(159)), >>> +}; >>> + >>> +static const struct sh_msiof_spi_info sh_msiof_info __initconst = { >>> + .rx_fifo_override = 256, >>> + .num_chipselect = 1, >>> +}; >>> + >>> +#define r8a7790_register_msiof(idx) \ >>> + platform_device_register_resndata(&platform_bus, \ >>> + "spi_r8a7790_msiof", \ >>> + (idx+1), sh_msiof##idx##_resources, \ >>> + ARRAY_SIZE(sh_msiof##idx##_resources), \ >>> + &sh_msiof_info, \ >>> + sizeof(struct sh_msiof_spi_info)) >> >> That for your efforts - it's good to see the MSIOF being integrated as >> well! I have one comment on this legacy board integration code. >> >> Since only MSIOF1 is used on Lager (correct me if i'm wrong), isn't it >> best to omit the unused resources from above? In case of DT I think it >> makes sense to define all channels in the SoC.dtsi and let the >> SoC-board.dts just enable the channels that are used. But in this case >> with legacy code I think we should keep thing simple and small and >> just enable the bits that are used on the particular board. >> >> The same obviously applies to the Koelsch legacy code as well. =) > > Note that while all resources are present, only MSIOF1 is registered on > Lager (MSIOF0 on Koelsch). This is similar to i2c on Koelsch, which also > has all resources, but only registers active devices. Ok, I understand. Thanks for brining this to my attention. I'd like to avoid having unused resources so I'll cook up a patch to rework that myself. > It's your preference, though, so I can adapt if you want. Thanks. Please rework this patch to only register a single MSIOF channel. I think it makes sense to only enable hardware that is being used. Another question: How about "bus_num" and the platform device id mapping? I'd like them to be the same if possible, but you are having this "(idx+1)" bit in your code which I assume is to add offset for the QSPI bus. Regarding the PFC configuration, can you please double check that the PIN_MAP_MUX_GROUP_DEFAULT() is in sync with the platform device id? Is it the "bus_num" or the platform device id that is being used in case of SPI? Thanks! / magnus -- 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/