Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
Date:   Mon, 17 Jul 2023 14:31:39 +0200
From:   Michael Walle <michael@walle.cc>
To:     SSunk <ssunkkan@gmail.com>
Cc:     tudor.ambarus@linaro.org, pratyush@kernel.org,
        miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
        linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
        SSunk <ssunkkan@gmail.com>
Subject: Re: [PATCH] Add support for XMC
 XM25QH128C/XM25QH256C/XM25QU256C/XM25QH512C/XM25QU512C
In-Reply-To: <20230717110625.8844-1-ssunkkan@gmail.com>
References: <20230717110625.8844-1-ssunkkan@gmail.com>
Message-ID: <bfc85475bdcea46ea6c3ece98cc1e9cc@walle.cc>
Content-Type: text/plain; charset=US-ASCII;
 format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi,

> Add more XMC chip support

Please elaborate.

> Signed-off-by: SSunk <ssunkkan@gmail.com>

We need a proper first and last name.

> ---
>  drivers/mtd/spi-nor/xmc.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/mtd/spi-nor/xmc.c b/drivers/mtd/spi-nor/xmc.c
> index 051411e86339..b2374187ec4f 100644
> --- a/drivers/mtd/spi-nor/xmc.c
> +++ b/drivers/mtd/spi-nor/xmc.c
> @@ -16,6 +16,22 @@ static const struct flash_info xmc_nor_parts[] = {
>  	{ "XM25QH128A", INFO(0x207018, 0, 64 * 1024, 256)
>  		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
>  			      SPI_NOR_QUAD_READ) },
> +	{ "XM25QH128C", INFO(0x204018, 0, 64 * 1024, 256)
> +		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> +			      SPI_NOR_QUAD_READ) },
> +	{ "XM25QH256C", INFO(0x204019, 0, 64 * 1024, 512)
> +		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> +			      SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
> +	{ "XM25QU256C", INFO(0x204119, 0, 64 * 1024, 512)
> +		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> +			      SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
> +	{ "XM25QH512C", INFO(0x204020, 0, 64 * 1024, 1024)
> +		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> +			      SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
> +	{ "XM25QU512C", INFO(0x204120, 0, 64 * 1024, 1024)
> +		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
> +			      SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
> +

XMC parts seem to have SFDP tables and they should work out of the box
without any patches with the generic spi nor driver [1]. Therefore,
you don't need any entry at all.

-michael

[1] 
https://elixir.bootlin.com/linux/v6.4-rc6/source/drivers/mtd/spi-nor/core.c#L2019