linux-kernel - Re: [PATCH v1 2/2] spi: amlogic-spifc-a1: add support for max_speed

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Message-ID: <ZKVDjTCFAcJxO_Ci@surfacebook>
Date:   Wed, 5 Jul 2023 13:18:53 +0300
From:   andy.shevchenko@...il.com
To:     Martin Kurbanov <mmkurbanov@...rdevices.ru>
Cc:     Mark Brown <broonie@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        linux-spi@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel@...rdevices.ru
Subject: Re: [PATCH v1 2/2] spi: amlogic-spifc-a1: add support for
 max_speed_hz

Mon, Jul 03, 2023 at 12:45:18PM +0300, Martin Kurbanov kirjoitti:
> This patch sets the clock rate (spi_transfer->max_speed_hz) from the
> amlogic_spifc_a1_exec_op().

...

> +static int amlogic_spifc_a1_set_freq(struct amlogic_spifc_a1 *spifc, u32 freq)
> +{
> +	int ret;
> +
> +	if (freq == spifc->curr_speed_hz)
> +		return 0;
> +
> +	ret = clk_set_rate(spifc->clk, freq);
> +	if (!ret)
> +		spifc->curr_speed_hz = freq;
> +
> +	return ret;

The form 

	ret = clk_set_rate(spifc->clk, freq);
	if (ret)
		return ret;

	spifc->curr_speed_hz = freq;
	return 0;

less error prone in case some code is squeezed in between.

> +}

-- 
With Best Regards,
Andy Shevchenko