Date:   Wed, 5 Jan 2022 08:36:37 +0100
From:   Boris Brezillon <boris.brezillon@collabora.com>
To:     Pratyush Yadav <p.yadav@ti.com>
Cc:     Apurva Nandan <a-nandan@ti.com>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Richard Weinberger <richard@nod.at>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Mark Brown <broonie@kernel.org>,
        Patrice Chotard <patrice.chotard@foss.st.com>,
        Christophe Kerello <christophe.kerello@foss.st.com>,
        Daniel Palmer <daniel@0x0f.com>,
        Alexander Lobakin <alobakin@pm.me>,
        <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
        <linux-spi@vger.kernel.org>
Subject: Re: [PATCH v3 01/17] spi: spi-mem: Add DTR templates for cmd,
 address, dummy and data phase
Message-ID: <20220105083637.651f0d01@collabora.com>
In-Reply-To: <20220105055053.s4yfnk7cjedwtgvn@ti.com>
References: <20220101074250.14443-1-a-nandan@ti.com>
        <20220101074250.14443-2-a-nandan@ti.com>
        <20220104163100.56850d0b@collabora.com>
        <20220105055053.s4yfnk7cjedwtgvn@ti.com>
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On Wed, 5 Jan 2022 11:20:55 +0530
Pratyush Yadav <p.yadav@ti.com> wrote:

> On 04/01/22 04:31PM, Boris Brezillon wrote:
> > and you get to define a DTR op like that:
> > 
> > 	struct spi_mem_op op =
> > 		SPI_MEM_OP(SPI_MEM_OP_EXT_CMD(2, 0x1234, 8, SPI_MEM_OP_DTR),
> > 			   SPI_MEM_OP_ADDR(4, 0xdeadbeef, 8, SPI_MEM_OP_DTR),
> > 			   SPI_MEM_OP_DATA_OUT(128, buf, 8, SPI_MEM_OP_DTR));
> > 
> > This also means we can extend the struct without having to define new macros.  
> 
> I like this. It would also let us easily mix-and-match the ecc parameter 
> that Miquel is adding.
> 

In practice, I doubt you'll ever set the ecc bit when declaring the op,
it's more a modification you do afterwards if ECC needs to be enabled,
but who knows...