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Wed, 31 Jul 2019 09:12:08 +0000 From: To: , , CC: , , , , , , , Subject: [PATCH 1/6] mtd: spi-nor: Add post_sfdp() hook to tweak flash config Thread-Topic: [PATCH 1/6] mtd: spi-nor: Add post_sfdp() hook to tweak flash config Thread-Index: AQHVR4AHEj1fjWjkOU2mBlHhbksvPA== Date: Wed, 31 Jul 2019 09:12:08 +0000 Message-ID: <20190731091145.27374-2-tudor.ambarus@microchip.com> References: <20190731091145.27374-1-tudor.ambarus@microchip.com> In-Reply-To: <20190731091145.27374-1-tudor.ambarus@microchip.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1PR08CA0130.eurprd08.prod.outlook.com (2603:10a6:800:d4::32) To MN2PR11MB4448.namprd11.prod.outlook.com (2603:10b6:208:193::29) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.9.5 x-originating-ip: [94.177.32.154] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 7ac62ca9-a150-4ce5-23c8-08d7159729be x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020);SRVR:MN2PR11MB4414; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 7ac62ca9-a150-4ce5-23c8-08d7159729be X-MS-Exchange-CrossTenant-originalarrivaltime: 31 Jul 2019 09:12:08.2677 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: tudor.ambarus@microchip.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB4414 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Boris Brezillon SFDP tables are sometimes wrong and we need a way to override the config chosen by the SFDP parsing logic without discarding all of it. Add a new hook called after the SFDP parsing has taken place to deal with such problems. Signed-off-by: Boris Brezillon Signed-off-by: Tudor Ambarus --- drivers/mtd/spi-nor/spi-nor.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 9b9f9b530207..2c2d13060427 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -221,6 +221,11 @@ struct sfdp_bfpt { * flash parameters when information provided by the flash_= info * table is incomplete or wrong. * @post_bfpt: called after the BFPT table has been parsed + * @post_sfdp: called after SFDP has been parsed (is also called for SPI N= ORs + * that do not support RDSFDP). Typically used to tweak variou= s + * parameters that could not be extracted by other means (i.e. + * when information provided by the SFDP/flash_info tables are + * incomplete or wrong). * * Those hooks can be used to tweak the SPI NOR configuration when the SFD= P * table is broken or not available. @@ -232,6 +237,8 @@ struct spi_nor_fixups { const struct sfdp_parameter_header *bfpt_header, const struct sfdp_bfpt *bfpt, struct spi_nor_flash_parameter *params); + void (*post_sfdp)(struct spi_nor *nor, + struct spi_nor_flash_parameter *params); }; =20 struct flash_info { @@ -4444,6 +4451,13 @@ static void spi_nor_default_init_params(struct spi_n= or *nor, spi_nor_init_uniform_erase_map(map, erase_mask, params->size); } =20 +static void spi_nor_post_sfdp_fixups(struct spi_nor *nor, + struct spi_nor_flash_parameter *params) +{ + if (nor->info->fixups && nor->info->fixups->post_sfdp) + return nor->info->fixups->post_sfdp(nor, params); +} + static void spi_nor_init_params(struct spi_nor *nor, struct spi_nor_flash_parameter *params) { @@ -4454,6 +4468,8 @@ static void spi_nor_init_params(struct spi_nor *nor, if ((nor->info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)) && !(nor->info->flags & SPI_NOR_SKIP_SFDP)) spi_nor_sfdp_init_params(nor, params); + + spi_nor_post_sfdp_fixups(nor, params); } =20 static int spi_nor_select_read(struct spi_nor *nor, --=20 2.9.5