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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EAEDBC388F9 for ; Tue, 27 Oct 2020 09:35:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9224C2224E for ; Tue, 27 Oct 2020 09:35:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BvUEyPB8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2894789AbgJ0Jfh (ORCPT ); Tue, 27 Oct 2020 05:35:37 -0400 Received: from mail-ot1-f68.google.com ([209.85.210.68]:40493 "EHLO mail-ot1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2409421AbgJ0Jfh (ORCPT ); Tue, 27 Oct 2020 05:35:37 -0400 Received: by mail-ot1-f68.google.com with SMTP id f97so550832otb.7 for ; Tue, 27 Oct 2020 02:35:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=IGshFFTXhBMJZj+oIimI9I+L/2SGCYIcZp/aHudl99M=; b=BvUEyPB8bpW0T4Os1k1hnQdCKy+ptMPYIudXPu7+vrg3Q60T6803A5lCXczld92/7L gzAkI/+T4iGNu++Ii1J+XDd4xTuIqyZJavwdZw0yEtZMX9bbySGDz10U1vd3v8ofaajL s2RtjuXufaFZRQ5FBBFFeT8nVlO3+KGc10WytBD/yArHfCRw+EsaHkDf20CUmKCQ0KFo +yCyCjuqqA/nm/mc3rlHwX5eXvnUaqKH6MraXDBAthJYLqgv/PG52RMpwDBTbWqRsKHR elvOfvUpy1WESfQcgjnSxdHN6g63iB9+xMTrBbYPJnbOLxGhaY+iEHdYpMn23i+9PKrw oZZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=IGshFFTXhBMJZj+oIimI9I+L/2SGCYIcZp/aHudl99M=; b=V4zVeDRxv5Wd1p7cY9nmhz0zmFgNppwcGK8duAEWbSCess6LVOd7e24oiq5/2ikiw+ NWig9QpvzNiMiysBUxp2aKAiYHgAAgPi/QNLOfYLJOBDzRVm5m8Zw99XCrX9ya1lt9FD 1AZcpZ1R3rtRy+/G4lyjSMywLEfGX9afCw7Bk5dPZHXAcQ5oxj5k1mW+zz9vE5FwJmtt ZqKpEI+4wRO5u7IZflf1vJ6aZSeHj3jEI2XaSvd6xSMVlUA4uXaSyFGUXTKw8fCnTGwC F/LnxX2ld3ABPX7MPc1o9LRqNd41nq1+k86NodkBQVQfzMFUwe3uBidAkE7mgBd7WxNr bOAw== X-Gm-Message-State: AOAM531jI5WDGYhXVOhEmyAOujNIOZLQEFdHZuCuabwVQBQCBwHD4oo3 R/M00CWIYcFFqaAkAHU/dEppQPmKp2BLRVlDBac= X-Google-Smtp-Source: ABdhPJx3uysfOp4rLB9Ih6WFlFCYJfgQWtSMeTjf5SQ3RJkjw9j3XDeGuCEM1goAlgePLg8ZyCgV4LEcDCBxEWYd3VI= X-Received: by 2002:a9d:65c7:: with SMTP id z7mr825262oth.327.1603791335242; Tue, 27 Oct 2020 02:35:35 -0700 (PDT) MIME-Version: 1.0 References: <1600770019-11585-1-git-send-email-gene.chen.richtek@gmail.com> <1600770019-11585-11-git-send-email-gene.chen.richtek@gmail.com> In-Reply-To: <1600770019-11585-11-git-send-email-gene.chen.richtek@gmail.com> From: Gene Chen Date: Tue, 27 Oct 2020 17:35:23 +0800 Message-ID: Subject: Re: [PATCH v5 10/10] mfd: mt6360: Merge different sub-devices I2C read/write To: Lee Jones , Matthias Brugger Cc: linux-arm Mailing List , "moderated list:ARM/Mediatek SoC support" , Linux Kernel Mailing List , Gene Chen , Wilma.Wu@mediatek.com, shufan_lee@richtek.com, cy_huang@richtek.com, benjamin.chao@mediatek.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear Reviewers, Does any comments about this patch v5 10/10? Gene Chen =E6=96=BC 2020=E5=B9=B49=E6=9C=8822= =E6=97=A5 =E9=80=B1=E4=BA=8C =E4=B8=8B=E5=8D=886:21=E5=AF=AB=E9=81=93=EF=BC= =9A > > From: Gene Chen > > Merge different sub-devices I2C read/write functions into one Regmap, > because PMIC and LDO part need CRC bits for access protection. > > Signed-off-by: Gene Chen > --- > drivers/mfd/Kconfig | 1 + > drivers/mfd/mt6360-core.c | 224 ++++++++++++++++++++++++++++++++++++++--= ------ > 2 files changed, 190 insertions(+), 35 deletions(-) > > diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig > index 33df083..1dfe446 100644 > --- a/drivers/mfd/Kconfig > +++ b/drivers/mfd/Kconfig > @@ -913,6 +913,7 @@ config MFD_MT6360 > select MFD_CORE > select REGMAP_I2C > select REGMAP_IRQ > + select CRC8 > depends on I2C > help > Say Y here to enable MT6360 PMU/PMIC/LDO functional support. > diff --git a/drivers/mfd/mt6360-core.c b/drivers/mfd/mt6360-core.c > index 075b466..2ec9559 100644 > --- a/drivers/mfd/mt6360-core.c > +++ b/drivers/mfd/mt6360-core.c > @@ -62,6 +62,18 @@ struct mt6360_ddata { > > #define MT6360_CRC8_POLYNOMIAL 0x7 > > +#define MT6360_CRC_I2C_ADDR_SIZE 1 > +#define MT6360_CRC_REG_ADDR_SIZE 1 > +/* prealloca read size =3D i2c device addr + i2c reg addr + val ... + cr= c8 */ > +#define MT6360_ALLOC_READ_SIZE(_size) (_size + 3) > +/* prealloca write size =3D i2c device addr + i2c reg addr + val ... + c= rc8 + dummy byte */ > +#define MT6360_ALLOC_WRITE_SIZE(_size) (_size + 4) > +#define MT6360_CRC_PREDATA_OFFSET (MT6360_CRC_I2C_ADDR_SIZE + MT636= 0_CRC_REG_ADDR_SIZE) > +#define MT6360_CRC_CRC8_SIZE 1 > +#define MT6360_CRC_DUMMY_BYTE_SIZE 1 > +#define MT6360_REGMAP_REG_BYTE_SIZE 2 > +#define I2C_ADDR_XLATE_8BIT(_addr, _rw) (((_addr & 0x7F) << 1) + = _rw) > + > /* reg 0 -> 0 ~ 7 */ > #define MT6360_CHG_TREG_EVT 4 > #define MT6360_CHG_AICR_EVT 5 > @@ -266,12 +278,6 @@ static const struct regmap_irq_chip mt6360_irq_chip = =3D { > .use_ack =3D true, > }; > > -static const struct regmap_config mt6360_pmu_regmap_config =3D { > - .reg_bits =3D 8, > - .val_bits =3D 8, > - .max_register =3D MT6360_PMU_MAXREG, > -}; > - > static const struct resource mt6360_adc_resources[] =3D { > DEFINE_RES_IRQ_NAMED(MT6360_ADC_DONEI, "adc_donei"), > }; > @@ -334,7 +340,7 @@ static const struct mfd_cell mt6360_devs[] =3D { > OF_MFD_CELL("mt6360-led", mt6360_led_resources, > NULL, 0, 0, "mediatek,mt6360-led"), > OF_MFD_CELL("mt6360-regulator", mt6360_regulator_resources, > - NULL, 0, 0, "mediatek,mt6360-regulator"), > + NULL, 0, 0, NULL), > OF_MFD_CELL("mt6360-tcpc", NULL, > NULL, 0, 0, "mediatek,mt6360-tcpc"), > }; > @@ -349,7 +355,7 @@ static int mt6360_check_vendor_info(struct mt6360_dda= ta *ddata) > return ret; > > if ((info & CHIP_VEN_MASK) !=3D CHIP_VEN_MT6360) { > - dev_err(&client->dev, "Device not supported\n"); > + dev_err(ddata->dev, "Device not supported\n"); > return -ENODEV; > } > > @@ -358,11 +364,161 @@ static int mt6360_check_vendor_info(struct mt6360_= ddata *ddata) > return 0; > } > > -static const unsigned short mt6360_slave_addr[MT6360_SLAVE_MAX] =3D { > - MT6360_PMU_SLAVEID, > +static const unsigned short mt6360_slave_addrs[MT6360_SLAVE_MAX] =3D { > + MT6360_TCPC_SLAVEID, > MT6360_PMIC_SLAVEID, > MT6360_LDO_SLAVEID, > - MT6360_TCPC_SLAVEID, > + MT6360_PMU_SLAVEID, > +}; > + > +static int mt6360_xlate_pmicldo_addr(u8 *addr, int rw_size) > +{ > + /* Address is already in encoded [5:0] */ > + *addr &=3D MT6360_ADDRESS_MASK; > + > + switch (rw_size) { > + case 1: > + *addr |=3D MT6360_DATA_SIZE_1_BYTE; > + break; > + case 2: > + *addr |=3D MT6360_DATA_SIZE_2_BYTES; > + break; > + case 3: > + *addr |=3D MT6360_DATA_SIZE_3_BYTES; > + break; > + case 4: > + *addr |=3D MT6360_DATA_SIZE_4_BYTES; > + break; > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int mt6360_regmap_read(void *context, const void *reg, size_t reg= _size, > + void *val, size_t val_size) > +{ > + struct mt6360_ddata *ddata =3D context; > + u8 bank =3D *(u8 *)reg; > + u8 reg_addr =3D *(u8 *)(reg + 1); > + struct i2c_client *i2c =3D ddata->i2c[bank]; > + bool crc_needed =3D false; > + u8 *buf; > + int buf_len =3D MT6360_ALLOC_READ_SIZE(val_size); > + int read_size =3D val_size; > + u8 crc; > + int ret; > + > + if (bank =3D=3D MT6360_SLAVE_PMIC || bank =3D=3D MT6360_SLAVE_LDO= ) { > + crc_needed =3D true; > + ret =3D mt6360_xlate_pmicldo_addr(®_addr, val_size); > + if (ret < 0) > + return ret; > + read_size +=3D MT6360_CRC_CRC8_SIZE; > + } > + > + buf =3D kzalloc(buf_len, GFP_KERNEL); > + if (!buf) > + return -ENOMEM; > + > + buf[0] =3D I2C_ADDR_XLATE_8BIT(i2c->addr, I2C_SMBUS_READ); > + buf[1] =3D reg_addr; > + > + ret =3D i2c_smbus_read_i2c_block_data(i2c, reg_addr, read_size, > + buf + MT6360_CRC_PREDATA_OFFS= ET); > + if (ret < 0) > + goto out; > + else if (ret !=3D read_size) { > + ret =3D -EIO; > + goto out; > + } > + > + if (crc_needed) { > + crc =3D crc8(ddata->crc8_tbl, buf, val_size + MT6360_CRC_= PREDATA_OFFSET, 0); > + if (crc !=3D buf[val_size + MT6360_CRC_PREDATA_OFFSET]) { > + ret =3D -EIO; > + goto out; > + } > + } > + > + memcpy(val, buf + MT6360_CRC_PREDATA_OFFSET, val_size); > +out: > + kfree(buf); > + return (ret < 0) ? ret : 0; > +} > + > +static int mt6360_regmap_write(void *context, const void *val, size_t va= l_size) > +{ > + struct mt6360_ddata *ddata =3D context; > + u8 bank =3D *(u8 *)val; > + u8 reg_addr =3D *(u8 *)(val + 1); > + struct i2c_client *i2c =3D ddata->i2c[bank]; > + bool crc_needed =3D false; > + u8 *buf; > + int buf_len =3D MT6360_ALLOC_WRITE_SIZE(val_size); > + int write_size =3D val_size - MT6360_REGMAP_REG_BYTE_SIZE; > + int ret; > + > + if (bank =3D=3D MT6360_SLAVE_PMIC || bank =3D=3D MT6360_SLAVE_LDO= ) { > + crc_needed =3D true; > + ret =3D mt6360_xlate_pmicldo_addr(®_addr, val_size - M= T6360_REGMAP_REG_BYTE_SIZE); > + if (ret < 0) > + return ret; > + } > + > + buf =3D kzalloc(buf_len, GFP_KERNEL); > + if (!buf) > + return -ENOMEM; > + > + buf[0] =3D I2C_ADDR_XLATE_8BIT(i2c->addr, I2C_SMBUS_WRITE); > + buf[1] =3D reg_addr; > + memcpy(buf + MT6360_CRC_PREDATA_OFFSET, val + MT6360_REGMAP_REG_B= YTE_SIZE, write_size); > + > + if (crc_needed) { > + buf[val_size] =3D crc8(ddata->crc8_tbl, buf, val_size, 0)= ; > + write_size +=3D (MT6360_CRC_CRC8_SIZE + MT6360_CRC_DUMMY_= BYTE_SIZE); > + } > + > + ret =3D i2c_smbus_write_i2c_block_data(i2c, reg_addr, write_size, > + buf + MT6360_CRC_PREDATA_OFF= SET); > + > + kfree(buf); > + return ret; > +} > + > +static const struct regmap_bus mt6360_regmap_bus =3D { > + .read =3D mt6360_regmap_read, > + .write =3D mt6360_regmap_write, > + > + /* Due to PMIC and LDO CRC access size limit */ > + .max_raw_read =3D 4, > + .max_raw_write =3D 4, > +}; > + > +static bool mt6360_is_readwrite_reg(struct device *dev, unsigned int reg= ) > +{ > + switch (reg) { > + case MT6360_REG_TCPCSTART ... MT6360_REG_TCPCEND: > + fallthrough; > + case MT6360_REG_PMICSTART ... MT6360_REG_PMICEND: > + fallthrough; > + case MT6360_REG_LDOSTART ... MT6360_REG_LDOEND: > + fallthrough; > + case MT6360_REG_PMUSTART ... MT6360_REG_PMUEND: > + return true; > + } > + > + return false; > +} > + > +static const struct regmap_config mt6360_regmap_config =3D { > + .reg_bits =3D 16, > + .val_bits =3D 8, > + .reg_format_endian =3D REGMAP_ENDIAN_BIG, > + .max_register =3D MT6360_REG_PMUEND, > + .writeable_reg =3D mt6360_is_readwrite_reg, > + .readable_reg =3D mt6360_is_readwrite_reg, > }; > > static int mt6360_probe(struct i2c_client *client) > @@ -375,9 +531,23 @@ static int mt6360_probe(struct i2c_client *client) > return -ENOMEM; > > ddata->dev =3D &client->dev; > - i2c_set_clientdata(client, ddata); > > - ddata->regmap =3D devm_regmap_init_i2c(client, &mt6360_pmu_regmap= _config); > + for (i =3D 0; i < MT6360_SLAVE_MAX - 1; i++) { > + ddata->i2c[i] =3D devm_i2c_new_dummy_device(&client->dev, > + client->adapter= , > + mt6360_slave_ad= drs[i]); > + if (IS_ERR(ddata->i2c[i])) { > + dev_err(&client->dev, > + "Failed to get new dummy I2C device for a= ddress 0x%x", > + mt6360_slave_addrs[i]); > + return PTR_ERR(ddata->i2c[i]); > + } > + } > + ddata->i2c[MT6360_SLAVE_MAX - 1] =3D client; > + > + crc8_populate_msb(ddata->crc8_tbl, MT6360_CRC8_POLYNOMIAL); > + ddata->regmap =3D devm_regmap_init(ddata->dev, &mt6360_regmap_bus= , ddata, > + &mt6360_regmap_config); > if (IS_ERR(ddata->regmap)) { > dev_err(&client->dev, "Failed to register regmap\n"); > return PTR_ERR(ddata->regmap); > @@ -387,34 +557,18 @@ static int mt6360_probe(struct i2c_client *client) > if (ret) > return ret; > > - ret =3D devm_regmap_add_irq_chip(&client->dev, ddata->regmap, cli= ent->irq, > - 0, 0, &mt6360_irq_chip, > - &ddata->irq_data); > + ret =3D devm_regmap_add_irq_chip(&client->dev, ddata->regmap, cli= ent->irq, 0, 0, > + &mt6360_irq_chip, &ddata->irq_data= ); > if (ret) { > dev_err(&client->dev, "Failed to add Regmap IRQ Chip\n"); > return ret; > } > > - ddata->i2c[0] =3D client; > - for (i =3D 1; i < MT6360_SLAVE_MAX; i++) { > - ddata->i2c[i] =3D devm_i2c_new_dummy_device(&client->dev, > - client->adapter, > - mt6360_slave_addr= [i]); > - if (IS_ERR(ddata->i2c[i])) { > - dev_err(&client->dev, > - "Failed to get new dummy I2C device for a= ddress 0x%x", > - mt6360_slave_addr[i]); > - return PTR_ERR(ddata->i2c[i]); > - } > - i2c_set_clientdata(ddata->i2c[i], ddata); > - } > - > - ret =3D devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO, > - mt6360_devs, ARRAY_SIZE(mt6360_devs), = NULL, > - 0, regmap_irq_get_domain(ddata->irq_da= ta)); > + ret =3D devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO, m= t6360_devs, > + ARRAY_SIZE(mt6360_devs), NULL, 0, > + regmap_irq_get_domain(ddata->irq_data)= ); > if (ret) { > - dev_err(&client->dev, > - "Failed to register subordinate devices\n"); > + dev_err(&client->dev, "Failed to register subordinate dev= ices\n"); > return ret; > } > > -- > 2.7.4 > 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 X-Spam-Level: X-Spam-Status: No, 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AOAM530HrT/otkAY1yWDfdSz9Tsm48c1GWZm3CjLzutdu5qiKG8u0V73 uFKydNNGOvosFJ/BCWkkYehdLvbkyv1v6kOaJ0Y= X-Google-Smtp-Source: ABdhPJx3uysfOp4rLB9Ih6WFlFCYJfgQWtSMeTjf5SQ3RJkjw9j3XDeGuCEM1goAlgePLg8ZyCgV4LEcDCBxEWYd3VI= X-Received: by 2002:a9d:65c7:: with SMTP id z7mr825262oth.327.1603791335242; Tue, 27 Oct 2020 02:35:35 -0700 (PDT) MIME-Version: 1.0 References: <1600770019-11585-1-git-send-email-gene.chen.richtek@gmail.com> <1600770019-11585-11-git-send-email-gene.chen.richtek@gmail.com> In-Reply-To: <1600770019-11585-11-git-send-email-gene.chen.richtek@gmail.com> From: Gene Chen Date: Tue, 27 Oct 2020 17:35:23 +0800 Message-ID: Subject: Re: [PATCH v5 10/10] mfd: mt6360: Merge different sub-devices I2C read/write To: Lee Jones , Matthias Brugger X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201027_053537_505398_07D61A39 X-CRM114-Status: GOOD ( 27.42 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gene Chen , Linux Kernel Mailing List , cy_huang@richtek.com, benjamin.chao@mediatek.com, "moderated list:ARM/Mediatek SoC support" , Wilma.Wu@mediatek.com, linux-arm Mailing List , shufan_lee@richtek.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org RGVhciBSZXZpZXdlcnMsCgogICAgRG9lcyBhbnkgY29tbWVudHMgYWJvdXQgdGhpcyBwYXRjaCB2 NSAxMC8xMD8KCkdlbmUgQ2hlbiA8Z2VuZS5jaGVuLnJpY2h0ZWtAZ21haWwuY29tPiDmlrwgMjAy MOW5tDnmnIgyMuaXpSDpgLHkuowg5LiL5Y2INjoyMeWvq+mBk++8mgoKCj4KPiBGcm9tOiBHZW5l IENoZW4gPGdlbmVfY2hlbkByaWNodGVrLmNvbT4KPgo+IE1lcmdlIGRpZmZlcmVudCBzdWItZGV2 aWNlcyBJMkMgcmVhZC93cml0ZSBmdW5jdGlvbnMgaW50byBvbmUgUmVnbWFwLAo+IGJlY2F1c2Ug UE1JQyBhbmQgTERPIHBhcnQgbmVlZCBDUkMgYml0cyBmb3IgYWNjZXNzIHByb3RlY3Rpb24uCj4K 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<1600770019-11585-11-git-send-email-gene.chen.richtek@gmail.com> In-Reply-To: <1600770019-11585-11-git-send-email-gene.chen.richtek@gmail.com> From: Gene Chen Date: Tue, 27 Oct 2020 17:35:23 +0800 Message-ID: Subject: Re: [PATCH v5 10/10] mfd: mt6360: Merge different sub-devices I2C read/write To: Lee Jones , Matthias Brugger X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201027_053537_505398_07D61A39 X-CRM114-Status: GOOD ( 27.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gene Chen , Linux Kernel Mailing List , cy_huang@richtek.com, benjamin.chao@mediatek.com, "moderated list:ARM/Mediatek SoC support" , Wilma.Wu@mediatek.com, linux-arm Mailing List , shufan_lee@richtek.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: 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