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Mon, 31 May 2021 08:56:39 +0000 From: To: , , CC: , , , Subject: Re: [PATCH v4 4/4] mtd: spi-nor: otp: implement erase for Winbond and similar flashes Thread-Topic: [PATCH v4 4/4] mtd: spi-nor: otp: implement erase for Winbond and similar flashes Thread-Index: AQHXVfre5CE4GzTJPUCkLlU8wI3quw== Date: Mon, 31 May 2021 08:56:39 +0000 Message-ID: <2d04a7f5-c99e-3177-5a1f-debe49f51ef5@microchip.com> References: <20210521194034.15249-1-michael@walle.cc> <20210521194034.15249-5-michael@walle.cc> In-Reply-To: <20210521194034.15249-5-michael@walle.cc> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 authentication-results: walle.cc; dkim=none (message not signed) header.d=none;walle.cc; dmarc=none action=none header.from=microchip.com; x-originating-ip: [79.115.63.82] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 59fba66c-600a-4885-044d-08d9241200e4 x-ms-traffictypediagnostic: MWHPR11MB1840: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:4303; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On 5/21/21 10:40 PM, Michael Walle wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > Winbond flashes with OTP support provide a command to erase the OTP > data. This might come in handy during development. > > This was tested with a Winbond W25Q32JW on a LS1028A SoC with the > NXP FSPI controller. > > Signed-off-by: Michael Walle > --- > drivers/mtd/spi-nor/core.c | 2 +- > drivers/mtd/spi-nor/core.h | 4 ++ > drivers/mtd/spi-nor/otp.c | 83 +++++++++++++++++++++++++++++++++++ > drivers/mtd/spi-nor/winbond.c | 1 + > 4 files changed, 89 insertions(+), 1 deletion(-) > > diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c > index bd2c7717eb10..9551effb6a44 100644 > --- a/drivers/mtd/spi-nor/core.c > +++ b/drivers/mtd/spi-nor/core.c > @@ -1318,7 +1318,7 @@ static u32 spi_nor_convert_addr(struct spi_nor *nor, loff_t addr) > /* > * Initiate the erasure of a single sector > */ > -static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr) > +int spi_nor_erase_sector(struct spi_nor *nor, u32 addr) > { > int i; > > diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h > index 28a2e0be97a3..9398a8738857 100644 > --- a/drivers/mtd/spi-nor/core.h > +++ b/drivers/mtd/spi-nor/core.h > @@ -207,6 +207,7 @@ struct spi_nor_otp_organization { > * @read: read from the SPI NOR OTP area. > * @write: write to the SPI NOR OTP area. > * @lock: lock an OTP region. > + * @erase: erase an OTP region. > * @is_locked: check if an OTP region of the SPI NOR is locked. > */ > struct spi_nor_otp_ops { > @@ -214,6 +215,7 @@ struct spi_nor_otp_ops { > int (*write)(struct spi_nor *nor, loff_t addr, size_t len, > const u8 *buf); > int (*lock)(struct spi_nor *nor, unsigned int region); > + int (*erase)(struct spi_nor *nor, loff_t addr); maybe better: int (*erase)(struct spi_nor *nor, loff_t addr, size_t len); > int (*is_locked)(struct spi_nor *nor, unsigned int region); > }; ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/