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 51229C43327 for ; Thu, 2 Jul 2026 11:08:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:References:Cc:To:Subject:From: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=roMBTHJ3YL3DpY1Xk3OoyAZMGIsM5k1HLpl3nIwppjU=; b=DioNPb+p/TU8JJofsJq6ZmhTnH U0hCQSGZkjrYi1azm9dYlat2EttnWVgHJNrPcCysdOOqQpotYxM80dKV4S5mCYuOD9qFicqug1c0Z 8H3tiTiR4pknrSBYwykDGNDu1Z4tPx5I9rOKNWTNHXJ7oJXppp7TrM6lt340U40ktHpSwXrVYHGRY 1rFGKtvL12LBemnd11bq6RmshiLJ86UQfycQD86azYlAwfWjGXtNOyhq0NAqxPE2H2ML/93Qv69MS APrsL+QTq4/+1v7tI/eR+EMoGkla0OYz0b2aQWwfNHzZ8E6y5OPuBz88fcIshZMNtH7r7UyVqrfyG g+5pwtCw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wfDzr-000000045Vq-0EVV; Thu, 02 Jul 2026 09:46:15 +0000 Received: from courrier.aliel.fr ([2a01:4f9:c011:1c83::1]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wfDzn-000000045TH-0sbp; Thu, 02 Jul 2026 09:46:13 +0000 Message-ID: <18ca03a9-3876-4a6e-aaa9-2fecb9bef7e6@aliel.fr> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=aliel.fr; s=courrier-s1; t=1782985563; bh=p0sFjWRzjbpxT6lmgqAxIzkvqCsmBHy10xTbeag3hQw=; h=Date:From:Subject:To:Cc:References:In-Reply-To; b=kvFLpalAw/VxiqBUqP3rsMzId96gOHBUtGQPWiXolq9p9/en2OvdQEpEjrXfcoRti 0ld9TUr2IXS6RjAbqS/WXtsxzkl1hkA8NnjNo+Upr1KpCC6TcifgMmEF+m+iA/xzcS L63fJdydame+xUdRPv+AYkaTWtDSd5xH1qJT2Juc= Date: Thu, 2 Jul 2026 11:45:25 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta From: linux-kernel-dev@aliel.fr Subject: Re: [PATCH v7 4/8] mfd: khadas-mcu: Add support for VIM4 MCU variant To: Lee Jones Cc: Neil Armstrong , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andi Shyti , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Beniamino Galvani , "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Liam Girdwood , Mark Brown , linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org References: <20260603-add-mcu-fan-khadas-vim4-v7-0-594ba8a965d8@aliel.fr> <20260603-add-mcu-fan-khadas-vim4-v7-4-594ba8a965d8@aliel.fr> <20260611164053.GC1212816@google.com> Content-Language: en-US In-Reply-To: <20260611164053.GC1212816@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260702_024611_847513_C0587387 X-CRM114-Status: GOOD ( 21.90 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 6/11/26 6:40 PM, Lee Jones wrote: > /* Sashiko Automation: Reviewed (0 Findings) */ > > On Wed, 03 Jun 2026, Ronald Claveau via B4 Relay wrote: > >> From: Ronald Claveau >> >> Refactor probe() to use per-variant values >> instead of hardcoded globals. >> >> Add dedicated regmap configuration for the VIM4 MCU, >> with its own volatile/writeable registers. >> >> Add the fan control register >> (0–100 levels vs 0–3 for previous supported boards). >> >> Add a new compatible string "khadas,vim4-mcu". >> >> Reviewed-by: Neil Armstrong >> Signed-off-by: Ronald Claveau >> --- >> drivers/mfd/khadas-mcu.c | 115 ++++++++++++++++++++++++++++++++++++++++------- >> 1 file changed, 99 insertions(+), 16 deletions(-) >> >> diff --git a/drivers/mfd/khadas-mcu.c b/drivers/mfd/khadas-mcu.c >> index ba981a7886921..1bf260729d73b 100644 >> --- a/drivers/mfd/khadas-mcu.c >> +++ b/drivers/mfd/khadas-mcu.c >> @@ -75,47 +75,129 @@ static const struct regmap_config khadas_mcu_regmap_config = { >> .cache_type = REGCACHE_MAPLE, >> }; >> >> -static struct mfd_cell khadas_mcu_fan_cells[] = { >> +static const struct khadas_mcu_fan_pdata khadas_mcu_fan_pdata = { >> + .fan_reg = KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG, >> + .max_level = 3, /* Fan speed: 0 = off, 1 = low, 2 = medium, 3 = high */ > > Instead of this comment, you could always just define the value(s)? > I will do that with define. >> +}; >> + >> +static const struct mfd_cell khadas_mcu_fan_cells[] = { >> /* VIM1/2 Rev13+ and VIM3 only */ >> - { .name = "khadas-mcu-fan-ctrl", }, >> + { >> + .name = "khadas-mcu-fan-ctrl", >> + .platform_data = &khadas_mcu_fan_pdata, >> + .pdata_size = sizeof(khadas_mcu_fan_pdata), > > No need to attempt to align the '=' like this, please. > I will remove these extra spaces. >> + }, >> }; >> >> -static struct mfd_cell khadas_mcu_cells[] = { >> +static const struct mfd_cell khadas_mcu_cells[] = { >> { .name = "khadas-mcu-user-mem", }, >> }; >> >> +static bool khadas_mcu_vim4_reg_volatile(struct device *dev, unsigned int reg) >> +{ >> + switch (reg) { >> + case KHADAS_MCU_PWR_OFF_CMD_REG: >> + case KHADAS_MCU_VIM4_REST_CONF_REG: >> + case KHADAS_MCU_WOL_INIT_START_REG: >> + case KHADAS_MCU_VIM4_LED_ON_RAM_REG: >> + case KHADAS_MCU_VIM4_FAN_CTRL_REG: >> + case KHADAS_MCU_VIM4_WDT_EN_REG: >> + case KHADAS_MCU_VIM4_SYS_RST_REG: >> + return true; >> + default: >> + return false; >> + } >> +} >> + >> +static bool khadas_mcu_vim4_reg_writeable(struct device *dev, unsigned int reg) >> +{ >> + switch (reg) { >> + case KHADAS_MCU_VERSION_0_REG: >> + case KHADAS_MCU_VERSION_1_REG: >> + case KHADAS_MCU_SHUTDOWN_NORMAL_STATUS_REG: >> + return false; >> + default: >> + return true; >> + } >> +} >> + >> +static const struct regmap_config khadas_mcu_vim4_regmap_config = { >> + .reg_bits = 8, >> + .reg_stride = 1, >> + .val_bits = 8, >> + .max_register = KHADAS_MCU_VIM4_SYS_RST_REG, >> + .volatile_reg = khadas_mcu_vim4_reg_volatile, >> + .writeable_reg = khadas_mcu_vim4_reg_writeable, >> + .cache_type = REGCACHE_MAPLE, >> +}; >> + >> +static const struct khadas_mcu_fan_pdata khadas_vim4_fan_pdata = { >> + .fan_reg = KHADAS_MCU_VIM4_FAN_CTRL_REG, >> + .max_level = 0x64, >> +}; >> + >> +static const struct mfd_cell khadas_mcu_vim4_cells[] = { >> + { >> + .name = "khadas-mcu-fan-ctrl", >> + .platform_data = &khadas_vim4_fan_pdata, >> + .pdata_size = sizeof(khadas_vim4_fan_pdata), >> + }, >> +}; >> + >> static int khadas_mcu_probe(struct i2c_client *client) >> { >> + const struct mfd_cell *cells, *fan_cells; >> + const struct regmap_config *regmap_cfg; >> struct device *dev = &client->dev; >> + int ncells, nfan_cells, ret; >> struct khadas_mcu *ddata; >> - int ret; >> >> ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); >> if (!ddata) >> return -ENOMEM; >> >> + switch ((uintptr_t)i2c_get_match_data(client)) { >> + case KHADAS_MCU_GENERIC: >> + regmap_cfg = &khadas_mcu_regmap_config; >> + cells = khadas_mcu_cells; >> + ncells = ARRAY_SIZE(khadas_mcu_cells); >> + fan_cells = khadas_mcu_fan_cells; >> + nfan_cells = ARRAY_SIZE(khadas_mcu_fan_cells); >> + break; >> + case KHADAS_MCU_VIM4: >> + regmap_cfg = &khadas_mcu_vim4_regmap_config; >> + cells = NULL; >> + ncells = 0; >> + fan_cells = khadas_mcu_vim4_cells; >> + nfan_cells = ARRAY_SIZE(khadas_mcu_vim4_cells); > > I'm not as offended by this as I thought I would be! > >> + break; >> + default: >> + return -ENODEV; >> + } >> + >> i2c_set_clientdata(client, ddata); >> >> ddata->dev = dev; >> >> - ddata->regmap = devm_regmap_init_i2c(client, &khadas_mcu_regmap_config); >> + ddata->regmap = devm_regmap_init_i2c(client, regmap_cfg); >> if (IS_ERR(ddata->regmap)) { >> ret = PTR_ERR(ddata->regmap); >> - dev_err(dev, "Failed to allocate register map: %d\n", ret); >> - return ret; >> + return dev_err_probe(dev, ret, "Failed to allocate register map\n"); >> } >> >> - ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, >> - khadas_mcu_cells, >> - ARRAY_SIZE(khadas_mcu_cells), >> - NULL, 0, NULL); >> - if (ret) >> - return ret; >> + if (cells && ncells) { >> + ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, >> + cells, >> + ncells, >> + NULL, 0, NULL); >> + if (ret) >> + return ret; >> + } >> >> if (of_property_present(dev->of_node, "#cooling-cells")) >> return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, >> - khadas_mcu_fan_cells, >> - ARRAY_SIZE(khadas_mcu_fan_cells), >> + fan_cells, >> + nfan_cells, >> NULL, 0, NULL); >> >> return 0; >> @@ -123,7 +205,8 @@ static int khadas_mcu_probe(struct i2c_client *client) >> >> #ifdef CONFIG_OF >> static const struct of_device_id khadas_mcu_of_match[] = { >> - { .compatible = "khadas,mcu", }, >> + { .compatible = "khadas,mcu", .data = (void *)KHADAS_MCU_GENERIC }, >> + { .compatible = "khadas,vim4-mcu", .data = (void *)KHADAS_MCU_VIM4 }, >> {}, >> }; >> MODULE_DEVICE_TABLE(of, khadas_mcu_of_match); >> >> -- >> 2.49.0 >> >> > -- Best regards, Ronald