linux-kernel - Re: [PATCH v4 1/2] spi: Add new driver for STMicroelectronics' SPI Controller

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Date:	Mon, 22 Dec 2014 18:36:22 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel@...inux.com, linux-spi@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v4 1/2] spi: Add new driver for STMicroelectronics' SPI
 Controller

On Tue, Dec 09, 2014 at 08:21:30PM +0000, Lee Jones wrote:
> This patch adds support for the SPI portion of ST's SSC device.

I've applied both of these, though I had to rename the DT binding
document and...

> +static int spi_st_clk_enable(struct spi_st *spi_st)
> +{
> +	/*
> +	 * Current platforms use one of the core clocks for SPI and I2C.
> +	 * If we attempt to disable the clock, the system will hang.
> +	 *
> +	 * TODO: Remove this when platform supports power domains.
> +	 */
> +	return 0;
> +
> +	return clk_prepare_enable(spi_st->clk);
> +}

...this is not good at all and a step back from the previous version -
if there are problems with the SoC integration they need to be fixed
there or possibly in the clock driver for the SoC rather than bodging
individual drivers.

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