{"id":2225665,"url":"http://patchwork.ozlabs.org/api/patches/2225665/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-i2c/patch/20260421-add-mcu-fan-khadas-vim4-v4-3-447114a28f2d@aliel.fr/","project":{"id":35,"url":"http://patchwork.ozlabs.org/api/projects/35/?format=json","name":"Linux I2C development","link_name":"linux-i2c","list_id":"linux-i2c.vger.kernel.org","list_email":"linux-i2c@vger.kernel.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260421-add-mcu-fan-khadas-vim4-v4-3-447114a28f2d@aliel.fr>","list_archive_url":null,"date":"2026-04-21T11:49:20","name":"[v4,3/8] mfd: khadas-mcu: Add per-variant configuration infrastructure and VIM4 support","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"a10b7b8440e984258d9fbd798c4c2166f2f2dcd4","submitter":{"id":93204,"url":"http://patchwork.ozlabs.org/api/people/93204/?format=json","name":"Ronald Claveau via B4 Relay","email":"devnull+linux-kernel-dev.aliel.fr@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-i2c/patch/20260421-add-mcu-fan-khadas-vim4-v4-3-447114a28f2d@aliel.fr/mbox/","series":[{"id":500785,"url":"http://patchwork.ozlabs.org/api/series/500785/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-i2c/list/?series=500785","date":"2026-04-21T11:49:19","name":"Add VIM4 MCU/FAN support","version":4,"mbox":"http://patchwork.ozlabs.org/series/500785/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225665/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225665/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-i2c@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=pc+GwCWY;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20260421-add-mcu-fan-khadas-vim4-v4-3-447114a28f2d@aliel.fr>","References":"<20260421-add-mcu-fan-khadas-vim4-v4-0-447114a28f2d@aliel.fr>","In-Reply-To":"<20260421-add-mcu-fan-khadas-vim4-v4-0-447114a28f2d@aliel.fr>","To":"Neil Armstrong , Lee Jones ,\n Rob Herring , Krzysztof Kozlowski ,\n Conor Dooley , Andi Shyti ,\n Kevin Hilman , Jerome Brunet ,\n Martin Blumenstingl ,\n Beniamino Galvani ,\n \"Rafael J. Wysocki\" ,\n Daniel Lezcano , Zhang Rui ,\n Lukasz Luba , Liam Girdwood ,\n Mark Brown ","Cc":"linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org,\n linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,\n linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org,\n Ronald Claveau ","X-Mailer":"b4 0.14.3","X-Developer-Signature":"v=1; a=openpgp-sha256; l=2417;\n i=linux-kernel-dev@aliel.fr; h=from:subject:message-id;\n bh=OW1b2Q/DJTEMxPikE6mdf/p+H5KyL7TPJwoR6k9njCc=;\n b=owGbwMvMwCWm1SvKXP3cUInxtFoSQ+bzlBLf8xq9kzd6bI5sNs5Yb137qeDDFXvPNbrKq642S\n 5j9u9XeUcrCIMbFICumyNI/1/LEu8tHz3zdo54CM4eVCWQIAxenAEzkmhsjw51DlrwHp5/grLJi\n v+YwQcCw6NLP9+GnVapOz70TkLppzl+GP1zF4Y9/zo5dePRV5fSbLavv2r0I1X3quSE4qXrxx0V\n 8FzgB","X-Developer-Key":"i=linux-kernel-dev@aliel.fr; a=openpgp;\n fpr=DFD863F61375BF917F0012173953305EF1D0EC3E","X-Endpoint-Received":"by B4 Relay for linux-kernel-dev@aliel.fr/default with\n auth_id=744","X-Original-From":"Ronald Claveau ","Reply-To":"linux-kernel-dev@aliel.fr"},"content":"From: Ronald Claveau \n\nIntroduce a per-variant configuration structure (khadas_mcu_data)\nholding the regmap config and MFD cells,\nselected at probe time via the of_device_id match data.\nThis makes adding other variants straightforward.\n\nAlso introduce khadas_mcu_fan_pdata to pass fan register address and\nmaximum level to the fan sub-driver, removing the hardcoded constants.\n\nSigned-off-by: Ronald Claveau \n---\n include/linux/mfd/khadas-mcu.h | 39 +++++++++++++++++++++++++++++++++++++--\n 1 file changed, 37 insertions(+), 2 deletions(-)","diff":"diff --git a/include/linux/mfd/khadas-mcu.h b/include/linux/mfd/khadas-mcu.h\nindex a99ba2ed0e4e0..75e275d3fa8d9 100644\n--- a/include/linux/mfd/khadas-mcu.h\n+++ b/include/linux/mfd/khadas-mcu.h\n@@ -70,6 +70,13 @@\n #define KHADAS_MCU_WOL_INIT_START_REG\t\t0x87 /* WO */\n #define KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG\t0x88 /* WO */\n \n+/* VIM4 specific registers */\n+#define KHADAS_MCU_VIM4_REST_CONF_REG\t\t0x2c /* WO - reset EEPROM */\n+#define KHADAS_MCU_VIM4_LED_ON_RAM_REG\t\t0x89 /* WO - LED volatile */\n+#define KHADAS_MCU_VIM4_FAN_CTRL_REG\t\t0x8a /* WO */\n+#define KHADAS_MCU_VIM4_WDT_EN_REG\t\t0x8b /* WO */\n+#define KHADAS_MCU_VIM4_SYS_RST_REG\t\t0x91 /* WO */\n+\n enum {\n \tKHADAS_BOARD_VIM1 = 0x1,\n \tKHADAS_BOARD_VIM2,\n@@ -82,10 +89,38 @@ enum {\n * struct khadas_mcu - Khadas MCU structure\n * @device:\t\tdevice reference used for logs\n * @regmap:\t\tregister map\n+ * @data:\t\tpointer to variant-specific config\n */\n struct khadas_mcu {\n-\tstruct device *dev;\n-\tstruct regmap *regmap;\n+\tstruct device\t\t\t*dev;\n+\tstruct regmap\t\t\t*regmap;\n+\tconst struct khadas_mcu_data\t*data;\n+};\n+\n+/**\n+ * struct khadas_mcu_data - per-variant configuration\n+ * @regmap_config:\tregmap configuration\n+ * @cells:\t\tMFD sub-devices\n+ * @ncells:\t\tnumber of sub-devices\n+ * @fan_cells:\t\tMFD fan sub-devices\n+ * @nfan_cells:\t\tnumber of fan sub-devices\n+ */\n+struct khadas_mcu_data {\n+\tconst struct regmap_config\t*regmap_config;\n+\tconst struct mfd_cell\t\t*cells;\n+\tint\t\t\t\tncells;\n+\tconst struct mfd_cell\t\t*fan_cells;\n+\tint\t\t\t\tnfan_cells;\n+};\n+\n+/**\n+ * struct khadas_mcu_fan_pdata - fan sub-driver configuration\n+ * @fan_reg: register address to write the fan level\n+ * @max_level: maximum fan level\n+ */\n+struct khadas_mcu_fan_pdata {\n+\tunsigned int fan_reg;\n+\tunsigned int max_level;\n };\n \n #endif /* MFD_KHADAS_MCU_H */\n","prefixes":["v4","3/8"]}