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([2a01:e0a:106d:1080:9899:e54b:a2f2:3695]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48fed92a753sm11994525f8f.45.2026.11.05.07.55.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Nov 2026 07:55:01 -0800 (PST) Message-ID: <1463c55e-3bcc-4a30-89db-def43c05fe44@linaro.org> Date: Thu, 5 Nov 2026 16:55:00 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Neil Armstrong Reply-To: Neil Armstrong Subject: Re: [PATCH] arm64: dts: amlogic: khadas-vim3: add SPI NOR flash overlay To: Jose Nieto , Kevin Hilman , linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org Cc: Jerome Brunet , Martin Blumenstingl , Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20261103164730.160593-1-jnieto.alaber@gmail.com> Content-Language: en-US, fr Autocrypt: addr=neil.armstrong@linaro.org; keydata= xsBNBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAHNKk5laWwgQXJtc3Ryb25nIDxuZWlsLmFybXN0cm9uZ0BsaW5hcm8ub3JnPsLAkQQTAQoA OwIbIwULCQgHAwUVCgkICwUWAgMBAAIeAQIXgBYhBInsPQWERiF0UPIoSBaat7Gkz/iuBQJk Q5wSAhkBAAoJEBaat7Gkz/iuyhMIANiD94qDtUTJRfEW6GwXmtKWwl/mvqQtaTtZID2dos04 YqBbshiJbejgVJjy+HODcNUIKBB3PSLaln4ltdsV73SBcwUNdzebfKspAQunCM22Mn6FBIxQ GizsMLcP/0FX4en9NaKGfK6ZdKK6kN1GR9YffMJd2P08EO8mHowmSRe/ExAODhAs9W7XXExw UNCY4pVJyRPpEhv373vvff60bHxc1k/FF9WaPscMt7hlkbFLUs85kHtQAmr8pV5Hy9ezsSRa GzJmiVclkPc2BY592IGBXRDQ38urXeM4nfhhvqA50b/nAEXc6FzqgXqDkEIwR66/Gbp0t3+r yQzpKRyQif3OwE0ETVkGzwEIALyKDN/OGURaHBVzwjgYq+ZtifvekdrSNl8TIDH8g1xicBYp QTbPn6bbSZbdvfeQPNCcD4/EhXZuhQXMcoJsQQQnO4vwVULmPGgtGf8PVc7dxKOeta+qUh6+ SRh3vIcAUFHDT3f/Zdspz+e2E0hPV2hiSvICLk11qO6cyJE13zeNFoeY3ggrKY+IzbFomIZY 4yG6xI99NIPEVE9lNBXBKIlewIyVlkOaYvJWSV+p5gdJXOvScNN1epm5YHmf9aE2ZjnqZGoM Mtsyw18YoX9BqMFInxqYQQ3j/HpVgTSvmo5ea5qQDDUaCsaTf8UeDcwYOtgI8iL4oHcsGtUX oUk33HEAEQEAAcLAXwQYAQIACQUCTVkGzwIbDAAKCRAWmrexpM/4rrXiB/sGbkQ6itMrAIfn M7IbRuiSZS1unlySUVYu3SD6YBYnNi3G5EpbwfBNuT3H8//rVvtOFK4OD8cRYkxXRQmTvqa3 3eDIHu/zr1HMKErm+2SD6PO9umRef8V82o2oaCLvf4WeIssFjwB0b6a12opuRP7yo3E3gTCS KmbUuLv1CtxKQF+fUV1cVaTPMyT25Od+RC1K+iOR0F54oUJvJeq7fUzbn/KdlhA8XPGzwGRy 4zcsPWvwnXgfe5tk680fEKZVwOZKIEuJC3v+/yZpQzDvGYJvbyix0lHnrCzq43WefRHI5XTT QbM0WUIBIcGmq38+OgUsMYu4NzLu7uZFAcmp6h8g Organization: Linaro In-Reply-To: <20261103164730.160593-1-jnieto.alaber@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11/3/26 17:47, Jose Nieto wrote: > The Khadas VIM3 has a 16 MiB SPI NOR flash (W25Q128) whose data lines are > shared with the eMMC D4-D7 lines. Add an overlay that restricts the eMMC to > 4-bit mode and enables the SPI NOR controller, exposing the flash as an MTD > device. > > The flash HOLD#/WP# lines are wired to the eMMC D3/D7 nets, so the > nor_hold_wp_pins pinctrl group is intentionally not used. > > Signed-off-by: Jose Nieto > --- > arch/arm64/boot/dts/amlogic/Makefile | 2 ++ > .../dts/amlogic/meson-khadas-vim3-spifc.dtso | 24 +++++++++++++++++++ > 2 files changed, 26 insertions(+) > create mode 100644 arch/arm64/boot/dts/amlogic/meson-khadas-vim3-spifc.dtso > > diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile > index 57bc440fa55c..3714cbaaa03e 100644 > --- a/arch/arm64/boot/dts/amlogic/Makefile > +++ b/arch/arm64/boot/dts/amlogic/Makefile > @@ -23,6 +23,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-g12a-u200.dtb > dtb-$(CONFIG_ARCH_MESON) += meson-g12a-x96-max.dtb > dtb-$(CONFIG_ARCH_MESON) += meson-g12b-a311d-bananapi-m2s.dtb > dtb-$(CONFIG_ARCH_MESON) += meson-g12b-a311d-khadas-vim3.dtb > +dtb-$(CONFIG_ARCH_MESON) += meson-g12b-a311d-khadas-vim3-spifc.dtb > dtb-$(CONFIG_ARCH_MESON) += meson-g12b-a311d-khadas-vim3-ts050.dtb > dtb-$(CONFIG_ARCH_MESON) += meson-g12b-bananapi-cm4-cm4io.dtb > dtb-$(CONFIG_ARCH_MESON) += meson-g12b-bananapi-cm4-mnt-reform2.dtb > @@ -104,5 +105,6 @@ dtb-$(CONFIG_ARCH_MESON) += meson-sm1-x96-air.dtb > # Overlays > meson-g12a-fbx8am-brcm-dtbs := meson-g12a-fbx8am.dtb meson-g12a-fbx8am-brcm.dtbo > meson-g12a-fbx8am-realtek-dtbs := meson-g12a-fbx8am.dtb meson-g12a-fbx8am-realtek.dtbo > +meson-g12b-a311d-khadas-vim3-spifc-dtbs := meson-g12b-a311d-khadas-vim3.dtb meson-khadas-vim3-spifc.dtbo > meson-g12b-a311d-khadas-vim3-ts050-dtbs := meson-g12b-a311d-khadas-vim3.dtb meson-khadas-vim3-ts050.dtbo > meson-sm1-khadas-vim3l-ts050-dtbs := meson-sm1-khadas-vim3l.dtb meson-khadas-vim3-ts050.dtbo > diff --git a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3-spifc.dtso b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3-spifc.dtso > new file mode 100644 > index 000000000000..c70780b11b9b > --- /dev/null > +++ b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3-spifc.dtso > @@ -0,0 +1,24 @@ > +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) > +/* > + * Copyright (c) 2026 Jose Nieto This change comes directly from the U-Boot file arch/arm/dts/meson-khadas-vim3-u-boot.dtsi so at least keep the Copyright and where the changes comes from. Neil > + * > + * The Khadas VIM3 on-board SPI NOR flash shares its data lines with the > + * eMMC data lines 4-7. Restrict the eMMC to 4-bit mode to free D4-D7 and > + * enable the SPI NOR controller, exposing the flash as an MTD device. > + * > + * The flash HOLD#/WP# lines are wired to the eMMC D3/D7 nets, so the > + * nor_hold_wp_pins pinctrl group is intentionally not used. > + */ > + > +/dts-v1/; > +/plugin/; > + > +&sd_emmc_c { > + pinctrl-0 = <&emmc_ctrl_pins>, <&emmc_data_4b_pins>, <&emmc_ds_pins>; > + bus-width = <4>; > +}; > + > +&spifc { > + status = "okay"; > +}; > +