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[130.180.211.218]) by smtp.googlemail.com with ESMTPSA id k3-20020a056000004300b0033b79d385f6sm21179398wrx.47.2024.02.22.10.44.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Feb 2024 10:44:13 -0800 (PST) Message-ID: Date: Thu, 22 Feb 2024 19:44:12 +0100 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 1/7] soc: sunxi: sram: export register 0 for THS on H616 Content-Language: en-US To: =?UTF-8?Q?Jernej_=C5=A0krabec?= , Vasily Khoruzhick , Yangtao Li , Chen-Yu Tsai , Samuel Holland , Andre Przywara Cc: "Rafael J . Wysocki" , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Martin Botka , Maksim Kiselev , Bob McChesney , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev References: <20240219153639.179814-1-andre.przywara@arm.com> <20240219153639.179814-2-andre.przywara@arm.com> <2717467.mvXUDI8C0e@jernej-laptop> From: Daniel Lezcano In-Reply-To: <2717467.mvXUDI8C0e@jernej-laptop> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 22/02/2024 19:26, Jernej Škrabec wrote: > Dne ponedeljek, 19. februar 2024 ob 16:36:33 CET je Andre Przywara napisal(a): >> The Allwinner H616 SoC contains a mysterious bit at register offset 0x0 >> in the SRAM control block. If bit 16 is set (the reset value), the >> temperature readings of the THS are way off, leading to reports about >> 200C, at normal ambient temperatures. Clearing this bits brings the >> reported values down to the expected values. >> The BSP code clears this bit in firmware (U-Boot), and has an explicit >> comment about this, but offers no real explanation. >> >> Experiments in U-Boot show that register 0x0 has no effect on the SRAM C >> visibility: all tested bit settings still allow full read and write >> access by the CPU to the whole of SRAM C. Only bit 24 of the register at >> offset 0x4 makes all of SRAM C inaccessible by the CPU. So modelling >> the THS switch functionality as an SRAM region would not reflect reality. >> >> Since we should not rely on firmware settings, allow other code (the THS >> driver) to access this register, by exporting it through the already >> existing regmap. This mimics what we already do for the LDO control and >> the EMAC register. >> >> To avoid concurrent accesses to the same register at the same time, by >> the SRAM switch code and the regmap code, use the same lock to protect >> the access. The regmap subsystem allows to use an existing lock, so we >> just need to hook in there. >> >> Signed-off-by: Andre Przywara > > Reviewed-by: Jernej Skrabec > > I guess this one goes through sunxi tree, right? I'll pick this patch along with the patch 2-6, so through the thermal tree. The patch 7/7 will go indeed via the sunxi tree -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 08C51C5478C for ; Thu, 22 Feb 2024 18:44:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=J4LCuBbyAoTuSR84gYi+zgd2rOWX4Fmxxl4aK6nwXaw=; b=AVQcpcrNj8DpTS +2FWaVB7RHsc+w48AH9Lhu29Xrdb8cJOonWz0m3CQgD2MiQadT0zoHD41SVByUSWzdIn8kJF9u6H5 LSsYRw1cmtt9ttK61gGZ2mSOGnj1QH4uMKtvZ1pnNW/9adYGkB4lXpOcRcQJHpE8qojmBy9TX2jWe PK1vMiHpCVPbSvIVyrcMahC+R0dDSDGt+SQ0ULGWBkM1UdDNj4cs+q0WzLb6yZ11/SE4J0dcCk0X9 szPd3AhJlLI83GyopXddzW8KYkmZqReFmns39opa13z7c3+fZrG0BBJRNaEJ5kqRt+4EjINK6B7jS vHOthSZzvKsPUyFv4VHA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rdE3U-00000006BAO-2BOB; Thu, 22 Feb 2024 18:44:24 +0000 Received: from mail-wm1-x329.google.com ([2a00:1450:4864:20::329]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rdE3R-00000006B8S-2cl2 for linux-arm-kernel@lists.infradead.org; Thu, 22 Feb 2024 18:44:23 +0000 Received: by mail-wm1-x329.google.com with SMTP id 5b1f17b1804b1-412903facc9so372645e9.1 for ; Thu, 22 Feb 2024 10:44:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1708627454; x=1709232254; darn=lists.infradead.org; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=pBKdIE0MqGxWNqgnCMzfW9UY12c2Cp9wReUt3CTynV8=; b=GUxoAfgeLgD0G1Ogxyf89pJFqdlwNMAcPtw17dY4KozuhC/2rWrhpj1WdNrnPUazdL WHHPls+AK7olVLFHXs6doN1YJYBgovMnPIk36Sh+9RSsbOzBy9e55MS98/YrS5VJVxGl R4FE0jYSjVwKnaJ0oTT08HcfAX+YaFoMkoW4cE7WUDkgNkQe+rSTtdPdhkrHapOqfqvu C3FTi8NX6ShWzI+JMc/N89sGhZW0yjHXttOubiV0jXjCoeeinWrRY2znvR4HwsoC15I0 Md7OXxuqcWjGFwjNVNVBfhVd+m+bxO+rUCMO91WahAxCGV+GXAaKc49IUDPAhsm7qXJQ rhkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708627454; x=1709232254; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=pBKdIE0MqGxWNqgnCMzfW9UY12c2Cp9wReUt3CTynV8=; b=HaLk9zMMyXhW4fm9B/m7fJBs/c7Rxyq8XGD6sIU8YD6QaH4TCou9MxiZ9td79JT0gx /MQXfDHZCE2PkLzJrMQBeu9xzLPoFN+eQ6ansYtYiEFCSue3uUz/dcmqdNxCGYxpid/H YztFD4Wyoc3Y8bRyV8rz/EXtowOE34AubReFVXUyIvzQFrjpHjQ+rnbTjyA2Mrv4P99l YmtjSdrASH3iZoXHyp4xDQP9ASUxq4lyjlHCTe8O0/Wjv60zygXQu1eWb9h61n9icJmj qUrXEDmxPc1QYV60rM9abM9dTR4O8u2snFvsln1sQblrABeNGaPqvWPhJNEWOdr4dqnn 5ZQQ== X-Forwarded-Encrypted: i=1; AJvYcCVkQxGfDO9oYAJzHzr4vXnS4kCld3NeC708LTl3L4d0v9HlhhL9eOy8Pn/dVeHlj5MwRFJ8twGHWT2owyzOLR7IbCfObbmA4bzcslg6XJVzCcEpGGc= X-Gm-Message-State: AOJu0Yx36plFILcqu0vj8SqlrAJqVgEstgfQRkJH8cYEF71opA5QzKrc y/BwCC25cHf8MsYn+2yxdKrItf32KRt7ZESdxWOodLmkE64yna+aw+umAIMhMBQ= X-Google-Smtp-Source: AGHT+IGFxuTSliDPqku8YICfE8X0xSWjseqmFo4felniOL36LbKB9BcJX2RKD9QRRp8hCWOrEoiodQ== X-Received: by 2002:a5d:448f:0:b0:33d:35ef:ac2e with SMTP id j15-20020a5d448f000000b0033d35efac2emr15938wrq.17.1708627454014; Thu, 22 Feb 2024 10:44:14 -0800 (PST) Received: from [192.168.10.46] (146725694.box.freepro.com. [130.180.211.218]) by smtp.googlemail.com with ESMTPSA id k3-20020a056000004300b0033b79d385f6sm21179398wrx.47.2024.02.22.10.44.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Feb 2024 10:44:13 -0800 (PST) Message-ID: Date: Thu, 22 Feb 2024 19:44:12 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 1/7] soc: sunxi: sram: export register 0 for THS on H616 Content-Language: en-US To: =?UTF-8?Q?Jernej_=C5=A0krabec?= , Vasily Khoruzhick , Yangtao Li , Chen-Yu Tsai , Samuel Holland , Andre Przywara Cc: "Rafael J . Wysocki" , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Martin Botka , Maksim Kiselev , Bob McChesney , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev References: <20240219153639.179814-1-andre.przywara@arm.com> <20240219153639.179814-2-andre.przywara@arm.com> <2717467.mvXUDI8C0e@jernej-laptop> From: Daniel Lezcano In-Reply-To: <2717467.mvXUDI8C0e@jernej-laptop> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240222_104421_706238_B6866FD9 X-CRM114-Status: GOOD ( 16.40 ) 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-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMjIvMDIvMjAyNCAxOToyNiwgSmVybmVqIMWga3JhYmVjIHdyb3RlOgo+IERuZSBwb25lZGVs amVrLCAxOS4gZmVicnVhciAyMDI0IG9iIDE2OjM2OjMzIENFVCBqZSBBbmRyZSBQcnp5d2FyYSBu YXBpc2FsKGEpOgo+PiBUaGUgQWxsd2lubmVyIEg2MTYgU29DIGNvbnRhaW5zIGEgbXlzdGVyaW91 cyBiaXQgYXQgcmVnaXN0ZXIgb2Zmc2V0IDB4MAo+PiBpbiB0aGUgU1JBTSBjb250cm9sIGJsb2Nr LiBJZiBiaXQgMTYgaXMgc2V0ICh0aGUgcmVzZXQgdmFsdWUpLCB0aGUKPj4gdGVtcGVyYXR1cmUg cmVhZGluZ3Mgb2YgdGhlIFRIUyBhcmUgd2F5IG9mZiwgbGVhZGluZyB0byByZXBvcnRzIGFib3V0 Cj4+IDIwMEMsIGF0IG5vcm1hbCBhbWJpZW50IHRlbXBlcmF0dXJlcy4gQ2xlYXJpbmcgdGhpcyBi aXRzIGJyaW5ncyB0aGUKPj4gcmVwb3J0ZWQgdmFsdWVzIGRvd24gdG8gdGhlIGV4cGVjdGVkIHZh bHVlcy4KPj4gVGhlIEJTUCBjb2RlIGNsZWFycyB0aGlzIGJpdCBpbiBmaXJtd2FyZSAoVS1Cb290 KSwgYW5kIGhhcyBhbiBleHBsaWNpdAo+PiBjb21tZW50IGFib3V0IHRoaXMsIGJ1dCBvZmZlcnMg bm8gcmVhbCBleHBsYW5hdGlvbi4KPj4KPj4gRXhwZXJpbWVudHMgaW4gVS1Cb290IHNob3cgdGhh dCByZWdpc3RlciAweDAgaGFzIG5vIGVmZmVjdCBvbiB0aGUgU1JBTSBDCj4+IHZpc2liaWxpdHk6 IGFsbCB0ZXN0ZWQgYml0IHNldHRpbmdzIHN0aWxsIGFsbG93IGZ1bGwgcmVhZCBhbmQgd3JpdGUK Pj4gYWNjZXNzIGJ5IHRoZSBDUFUgdG8gdGhlIHdob2xlIG9mIFNSQU0gQy4gT25seSBiaXQgMjQg b2YgdGhlIHJlZ2lzdGVyIGF0Cj4+IG9mZnNldCAweDQgbWFrZXMgYWxsIG9mIFNSQU0gQyBpbmFj Y2Vzc2libGUgYnkgdGhlIENQVS4gU28gbW9kZWxsaW5nCj4+IHRoZSBUSFMgc3dpdGNoIGZ1bmN0 aW9uYWxpdHkgYXMgYW4gU1JBTSByZWdpb24gd291bGQgbm90IHJlZmxlY3QgcmVhbGl0eS4KPj4K Pj4gU2luY2Ugd2Ugc2hvdWxkIG5vdCByZWx5IG9uIGZpcm13YXJlIHNldHRpbmdzLCBhbGxvdyBv dGhlciBjb2RlICh0aGUgVEhTCj4+IGRyaXZlcikgdG8gYWNjZXNzIHRoaXMgcmVnaXN0ZXIsIGJ5 IGV4cG9ydGluZyBpdCB0aHJvdWdoIHRoZSBhbHJlYWR5Cj4+IGV4aXN0aW5nIHJlZ21hcC4gVGhp cyBtaW1pY3Mgd2hhdCB3ZSBhbHJlYWR5IGRvIGZvciB0aGUgTERPIGNvbnRyb2wgYW5kCj4+IHRo ZSBFTUFDIHJlZ2lzdGVyLgo+Pgo+PiBUbyBhdm9pZCBjb25jdXJyZW50IGFjY2Vzc2VzIHRvIHRo ZSBzYW1lIHJlZ2lzdGVyIGF0IHRoZSBzYW1lIHRpbWUsIGJ5Cj4+IHRoZSBTUkFNIHN3aXRjaCBj b2RlIGFuZCB0aGUgcmVnbWFwIGNvZGUsIHVzZSB0aGUgc2FtZSBsb2NrIHRvIHByb3RlY3QKPj4g dGhlIGFjY2Vzcy4gVGhlIHJlZ21hcCBzdWJzeXN0ZW0gYWxsb3dzIHRvIHVzZSBhbiBleGlzdGlu ZyBsb2NrLCBzbyB3ZQo+PiBqdXN0IG5lZWQgdG8gaG9vayBpbiB0aGVyZS4KPj4KPj4gU2lnbmVk LW9mZi1ieTogQW5kcmUgUHJ6eXdhcmEgPGFuZHJlLnByenl3YXJhQGFybS5jb20+Cj4gCj4gUmV2 aWV3ZWQtYnk6IEplcm5laiBTa3JhYmVjIDxqZXJuZWouc2tyYWJlY0BnbWFpbC5jb20+Cj4gCj4g SSBndWVzcyB0aGlzIG9uZSBnb2VzIHRocm91Z2ggc3VueGkgdHJlZSwgcmlnaHQ/CgpJJ2xsIHBp Y2sgdGhpcyBwYXRjaCBhbG9uZyB3aXRoIHRoZSBwYXRjaCAyLTYsIHNvIHRocm91Z2ggdGhlIHRo ZXJtYWwgCnRyZWUuIFRoZSBwYXRjaCA3Lzcgd2lsbCBnbyBpbmRlZWQgdmlhIHRoZSBzdW54aSB0 cmVlCgoKLS0gCjxodHRwOi8vd3d3LmxpbmFyby5vcmcvPiBMaW5hcm8ub3JnIOKUgiBPcGVuIHNv dXJjZSBzb2Z0d2FyZSBmb3IgQVJNIFNvQ3MKCkZvbGxvdyBMaW5hcm86ICA8aHR0cDovL3d3dy5m YWNlYm9vay5jb20vcGFnZXMvTGluYXJvPiBGYWNlYm9vayB8CjxodHRwOi8vdHdpdHRlci5jb20v IyEvbGluYXJvb3JnPiBUd2l0dGVyIHwKPGh0dHA6Ly93d3cubGluYXJvLm9yZy9saW5hcm8tYmxv Zy8+IEJsb2cKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmlu ZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9s aW51eC1hcm0ta2VybmVsCg==