Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37;
Message-ID: <4425afd4-c38c-4f27-96a6-9833fe2401b4@linaro.org>
Date:   Thu, 21 Sep 2023 15:35:51 +0100
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH v2] mtd: micron-st: enable lock/unlock for mt25qu512a
Content-Language: en-US
From:   Tudor Ambarus <tudor.ambarus@linaro.org>
To:     SHUKLA Mamta Ramendra <mamta.shukla@leica-geosystems.com>,
        "pratyush@kernel.org" <pratyush@kernel.org>,
        "michael@walle.cc" <michael@walle.cc>,
        "miquel.raynal@bootlin.com" <miquel.raynal@bootlin.com>,
        "richard@nod.at" <richard@nod.at>,
        "vigneshr@ti.com" <vigneshr@ti.com>,
        "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc:     GEO-CHHER-bsp-development 
        <bsp-development.geo@leica-geosystems.com>
References: <20230705154942.3936658-1-mamta.shukla@leica-geosystems.com>
 <19800e51-a871-be9f-9eb5-5829237e2613@linaro.org>
 <a8271289-0611-4e37-cf37-0be19a85656b@leica-geosystems.com>
 <084ed945-7674-280f-5866-9238473a294d@leica-geosystems.com>
 <17989610-d069-40e2-9b4d-7ca6bdf2497e@linaro.org>
In-Reply-To: <17989610-d069-40e2-9b4d-7ca6bdf2497e@linaro.org>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk


On 9/21/23 15:31, Tudor Ambarus wrote:
cut
> 
> So the first commit will look like:
> diff --git a/drivers/mtd/spi-nor/micron-st.c
> b/drivers/mtd/spi-nor/micron-st.c
> index 4afcfc57c896..a8da1f18e335 100644
> --- a/drivers/mtd/spi-nor/micron-st.c
> +++ b/drivers/mtd/spi-nor/micron-st.c
> @@ -405,9 +405,6 @@ static const struct flash_info st_nor_parts[] = {
>         }, {
>                 .id = SNOR_ID(0x20, 0xbb, 0x20, 0x10, 0x44, 0x00),
>                 .name = "mt25qu512a",
> -               .size = SZ_64M,
> -               .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ |
> SPI_NOR_QUAD_READ,
> -               .fixup_flags = SPI_NOR_4B_OPCODES,

since we removed the 4b-opcodes flag here,
>                 .mfr_flags = USE_FSR,
>         }, {
>                 .id = SNOR_ID(0x20, 0xbb, 0x20),
> 
> and the second one will add just the BP support, something like:
> diff --git a/drivers/mtd/spi-nor/micron-st.c
> b/drivers/mtd/spi-nor/micron-st.c
> index a8da1f18e335..fdafbfa0f936 100644
> --- a/drivers/mtd/spi-nor/micron-st.c
> +++ b/drivers/mtd/spi-nor/micron-st.c
> @@ -405,6 +405,8 @@ static const struct flash_info st_nor_parts[] = {
>         }, {
>                 .id = SNOR_ID(0x20, 0xbb, 0x20, 0x10, 0x44, 0x00),
>                 .name = "mt25qu512a",
> +               .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB |
> SPI_NOR_4BIT_BP |
> +                        SPI_NOR_BP3_SR_BIT6,
>                 .mfr_flags = USE_FSR,
>         }, {
>                 .id = SNOR_ID(0x20, 0xbb, 0x20),
> 
> Of course, I expect you to run again the mtd_debug tests and also verify
> the locking. Thanks!

would also be good if you can also verify that 4BAIT SFDP table is
present and you still use the 4B opcodes after the change.

> 
> Cheers,
> ta
>