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[212.114.21.58]) by smtp.gmail.com with ESMTPSA id v16-20020a5d4b10000000b002c56013c07fsm6310120wrq.109.2023.02.27.00.15.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Feb 2023 00:15:05 -0800 (PST) Message-ID: <8e5f9bfa-d612-cd43-d722-d04c40938c62@linaro.org> Date: Mon, 27 Feb 2023 09:15:04 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.2 From: neil.armstrong@linaro.org Subject: Re: [PATCH v1 0/3] Meson A1 32-bit support To: Alexey Romanov , robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, khilman@baylibre.com, jbrunet@baylibre.com, martin.blumenstingl@googlemail.com, linus.walleij@linaro.org Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@sberdevices.ru References: <20230222115020.55867-1-avromanov@sberdevices.ru> Content-Language: en-US Organization: Linaro Developer Services In-Reply-To: <20230222115020.55867-1-avromanov@sberdevices.ru> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230227_001508_327997_3217E539 X-CRM114-Status: GOOD ( 14.26 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: neil.armstrong@linaro.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On 22/02/2023 12:50, Alexey Romanov wrote: > Hello! > > This patchset adds support for 32-bit Meson A1 board. Hi Alexev, I'm aware Amlogic also runs their kernel as 32bit to gain a few kbytes of memory, but those processors are ARMv8 and the arm64 arch code has been designed for those CPUs. So far I didn't find a single good reason to add 32bit support for ARMv8 Amlogic based SoCs, if you have a solid reason please share. And as Krzysztof stated, the support is incomplete and cannot work without a dts file. Neil > We describe device tree with following components: > CPU, GIC, IRQ, Timer, UART, PIN controller. > It's capable of booting up into the serial console. > > We have tested this DTS and used drivers at our > 32-bit Meson A1 board and it works correctly. > > Alexey Romanov (3): > meson: pinctrl: use CONFIG_PINCTRL_A1 with CONFIG_ARM > firmware: meson: use CONFIG_MESON_SM with CONFIG_ARM > arch/arm: dts: introduce meson-a1 device tree > > arch/arm/boot/dts/meson-a1.dtsi | 151 ++++++++++++++++++++++++++++++++ > drivers/firmware/meson/Kconfig | 2 +- > drivers/pinctrl/meson/Kconfig | 2 +- > 3 files changed, 153 insertions(+), 2 deletions(-) > create mode 100644 arch/arm/boot/dts/meson-a1.dtsi > _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic