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Thu, 08 Apr 2021 17:45:07 +0000 Received: from relay6-d.mail.gandi.net ([217.70.183.198]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lUYhR-008oat-Nl for linux-arm-kernel@lists.infradead.org; Thu, 08 Apr 2021 17:44:31 +0000 X-Originating-IP: 90.65.108.55 Received: from localhost (lfbn-lyo-1-1676-55.w90-65.abo.wanadoo.fr [90.65.108.55]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id EFC15C0003; Thu, 8 Apr 2021 17:44:10 +0000 (UTC) Date: Thu, 8 Apr 2021 19:44:10 +0200 From: Alexandre Belloni To: Nicolas Ferre Cc: Claudiu Beznea - M18063 , Ludovic Desroches - M43218 , "robh+dt@kernel.org" , "linux@armlinux.org.uk" , "linux-arm-kernel@lists.infradead.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Eugen Hristev - M18282 Subject: Re: [PATCH 22/24] ARM: at91: sama7: introduce sama7 SoC family Message-ID: References: <20210331105908.23027-1-claudiu.beznea@microchip.com> <20210331105908.23027-23-claudiu.beznea@microchip.com> <21bd4417-a754-8ee6-370e-4fb4e0f1fef9@microchip.com> <51dbcf0b-4ee6-10c9-9598-a451cca16905@microchip.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <51dbcf0b-4ee6-10c9-9598-a451cca16905@microchip.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210408_184414_618546_82E54E47 X-CRM114-Status: GOOD ( 24.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 08/04/2021 17:24:39+0200, Nicolas Ferre wrote: > On 01/04/2021 at 12:24, Claudiu Beznea - M18063 wrote: > > On 01.04.2021 12:38, Claudiu Beznea - M18063 wrote: > > > On 31.03.2021 19:01, Alexandre Belloni wrote: > > > > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > > > > > > > On 31/03/2021 13:59:06+0300, Claudiu Beznea wrote: > > > > > From: Eugen Hristev > > > > > > > > > > Introduce new family of SoCs, sama7, and first SoC, sama7g5. > > > > > > > > > > Signed-off-by: Eugen Hristev > > > > > Signed-off-by: Claudiu Beznea > > > > > --- > > > > > arch/arm/mach-at91/Makefile | 1 + > > > > > arch/arm/mach-at91/sama7.c | 48 +++++++++++++++++++++++++++++++++++++ > > > > > 2 files changed, 49 insertions(+) > > > > > create mode 100644 arch/arm/mach-at91/sama7.c > > > > > > > > > > diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile > > > > > index f565490f1b70..6cc6624cddac 100644 > > > > > --- a/arch/arm/mach-at91/Makefile > > > > > +++ b/arch/arm/mach-at91/Makefile > > > > > @@ -9,6 +9,7 @@ obj-$(CONFIG_SOC_AT91SAM9) += at91sam9.o > > > > > obj-$(CONFIG_SOC_SAM9X60) += sam9x60.o > > > > > obj-$(CONFIG_SOC_SAMA5) += sama5.o > > > > > obj-$(CONFIG_SOC_SAMV7) += samv7.o > > > > > +obj-$(CONFIG_SOC_SAMA7) += sama7.o > > > > > > > > > > # Power Management > > > > > obj-$(CONFIG_ATMEL_PM) += pm.o pm_suspend.o > > > > > diff --git a/arch/arm/mach-at91/sama7.c b/arch/arm/mach-at91/sama7.c > > > > > new file mode 100644 > > > > > index 000000000000..e04cadb569ad > > > > > --- /dev/null > > > > > +++ b/arch/arm/mach-at91/sama7.c > > > > > @@ -0,0 +1,48 @@ > > > > > +// SPDX-License-Identifier: GPL-2.0-or-later > > > > > +/* > > > > > + * Setup code for SAMA7 > > > > > + * > > > > > + * Copyright (C) 2021 Microchip Technology, Inc. and its subsidiaries > > > > > + * > > > > > + */ > > > > > + > > > > > +#include > > > > > +#include > > > > > + > > > > > +#include > > > > > +#include > > > > > + > > > > > +#include "generic.h" > > > > > + > > > > > +static void __init sama7_common_init(void) > > > > > +{ > > > > > + of_platform_default_populate(NULL, NULL, NULL); > > > > > > > > Is this necessary? This is left as a workaround for the old SoCs using > > > > pinctrl-at91. I guess this will be using pio4 so this has to be removed. > > > > > > OK, I'll have a look. BTW, SAMA5D2 which is also using PIO4 calls > > > of_platform_default_populate(NULL, NULL, NULL); > > > > Without this call the PM code (arch/arm/mach-at/pm.c) is not able to locate > > proper DT nodes: > > > > [ 0.194615] at91_pm_backup_init: failed to find securam device! > > [ 0.201393] at91_pm_sram_init: failed to find sram device! > > [ 0.207449] AT91: PM not supported, due to no SRAM allocated > > Okay, so we can't afford removing these calls to sama5d2 and upcoming > sama7g5 right now. > > Is it a common pattern to have to reach DT content in the early stages that > explicit call to of_platform_default_populate() tries to solve? > That's fine, I didn't remember about that one, we can keep the call. -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel