linux-kernel - Re: [RFC v1 2/3] spi: microchip-core-qspi: Add regular transfers

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Message-ID: <20240612-spending-stalling-62070dbbcf3d@spud>
Date: Wed, 12 Jun 2024 21:48:16 +0100
From: Conor Dooley <conor@...nel.org>
To: Mark Brown <broonie@...nel.org>
Cc: linux-mmc@...r.kernel.org, Conor Dooley <conor.dooley@...rochip.com>,
	Ulf Hansson <ulf.hansson@...aro.org>, cyril.jean@...rochip.com,
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
	linux-spi@...r.kernel.org
Subject: Re: [RFC v1 2/3] spi: microchip-core-qspi: Add regular transfers

On Wed, Jun 12, 2024 at 05:40:39PM +0100, Mark Brown wrote:
> On Wed, Jun 12, 2024 at 04:48:32PM +0100, Conor Dooley wrote:
> 
> > +	//TODO: questionable robustness if both cs_change and cs_off toggle
> > +	list_for_each_entry(t, &m->transfers, transfer_list) {
> > +		//cs_change being set means we need to re-enable
> 
> Is it not possible to implement prepare_message() and transfer_one()
> rather than open coding all this?

If I can, I will. I already found one issue with the cs toggling in the
code Cyril gave me and I need to figure out why there's a udelay(750)
required later on in the function anyway!

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