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Tue, 27 Aug 2019 00:54:07 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Tue, 27 Aug 2019 00:54:07 -0500 Received: from [172.24.145.136] (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id x7R5s37Q059007; Tue, 27 Aug 2019 00:54:04 -0500 Subject: Re: [RESEND PATCH v3 07/20] mtd: spi_nor: Move manufacturer quad_enable() in ->default_init() To: , , , , , , References: <20190826120821.16351-1-tudor.ambarus@microchip.com> <20190826120821.16351-8-tudor.ambarus@microchip.com> From: Vignesh Raghavendra Message-ID: <143f11c8-1227-3907-e17a-b54f2612514f@ti.com> Date: Tue, 27 Aug 2019 11:24:41 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190826120821.16351-8-tudor.ambarus@microchip.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 26/08/19 5:38 PM, Tudor.Ambarus@microchip.com wrote: > From: Tudor Ambarus > > The goal is to move the quad_enable manufacturer specific init in the > nor->manufacturer->fixups->default_init() > > The legacy quad_enable() implementation is spansion_quad_enable(), > select this method by default. > > Set specific manufacturer fixups->default_init() hooks to overwrite > the default quad_enable() implementation when needed. > > Signed-off-by: Tudor Ambarus > Reviewed-by: Boris Brezillon > --- Reviewed-by: Vignesh Raghavendra Regards Vignesh > v3: collect R-b > > drivers/mtd/spi-nor/spi-nor.c | 48 ++++++++++++++++++++++++++----------------- > 1 file changed, 29 insertions(+), 19 deletions(-) > > diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c > index 3dbbfe34d1d2..2a239531704a 100644 > --- a/drivers/mtd/spi-nor/spi-nor.c > +++ b/drivers/mtd/spi-nor/spi-nor.c > @@ -4150,13 +4150,38 @@ static int spi_nor_parse_sfdp(struct spi_nor *nor, > return err; > } > > +static void macronix_set_default_init(struct spi_nor *nor) > +{ > + nor->params.quad_enable = macronix_quad_enable; > +} > + > +static void st_micron_set_default_init(struct spi_nor *nor) > +{ > + nor->params.quad_enable = NULL; > +} > + > /** > * spi_nor_manufacturer_init_params() - Initialize the flash's parameters and > - * settings based on ->default_init() hook. > + * settings based on MFR register and ->default_init() hook. > * @nor: pointer to a 'struct spi-nor'. > */ > static void spi_nor_manufacturer_init_params(struct spi_nor *nor) > { > + /* Init flash parameters based on MFR */ > + switch (JEDEC_MFR(nor->info)) { > + case SNOR_MFR_MACRONIX: > + macronix_set_default_init(nor); > + break; > + > + case SNOR_MFR_ST: > + case SNOR_MFR_MICRON: > + st_micron_set_default_init(nor); > + break; > + > + default: > + break; > + } > + > if (nor->info->fixups && nor->info->fixups->default_init) > nor->info->fixups->default_init(nor); > } > @@ -4168,6 +4193,9 @@ static int spi_nor_init_params(struct spi_nor *nor) > const struct flash_info *info = nor->info; > u8 i, erase_mask; > > + /* Initialize legacy flash parameters and settings. */ > + params->quad_enable = spansion_quad_enable; > + > /* Set SPI NOR sizes. */ > params->size = (u64)info->sector_size * info->n_sectors; > params->page_size = info->page_size; > @@ -4233,24 +4261,6 @@ static int spi_nor_init_params(struct spi_nor *nor) > SPINOR_OP_SE); > spi_nor_init_uniform_erase_map(map, erase_mask, params->size); > > - /* Select the procedure to set the Quad Enable bit. */ > - if (params->hwcaps.mask & (SNOR_HWCAPS_READ_QUAD | > - SNOR_HWCAPS_PP_QUAD)) { > - switch (JEDEC_MFR(info)) { > - case SNOR_MFR_MACRONIX: > - params->quad_enable = macronix_quad_enable; > - break; > - > - case SNOR_MFR_ST: > - case SNOR_MFR_MICRON: > - break; > - > - default: > - /* Kept only for backward compatibility purpose. */ > - params->quad_enable = spansion_quad_enable; > - break; > - } > - } > > spi_nor_manufacturer_init_params(nor); > > -- Regards Vignesh