linux-kernel - Re: [PATCH v4 3/3] spi: stm32-qspi: add automatic poll status feature

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Date:   Tue, 18 May 2021 16:37:07 +0200
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     <patrice.chotard@...s.st.com>
Cc:     Mark Brown <broonie@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        <linux-mtd@...ts.infradead.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        <linux-spi@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <christophe.kerello@...s.st.com>
Subject: Re: [PATCH v4 3/3] spi: stm32-qspi: add automatic poll status
 feature

On Tue, 18 May 2021 15:43:32 +0200
<patrice.chotard@...s.st.com> wrote:

> +static int stm32_qspi_poll_status(struct spi_mem *mem, const struct spi_mem_op *op,
> +				  u16 mask, u16 match,
> +				  unsigned long initial_delay_us,
> +				  unsigned long polling_rate_us,
> +				  unsigned long timeout_ms)
> +{
> +	struct stm32_qspi *qspi = spi_controller_get_devdata(mem->spi->master);
> +	int ret;
> +

The spi_mem_supports_op() call is still missing.

> +	ret = pm_runtime_get_sync(qspi->dev);
> +	if (ret < 0) {
> +		pm_runtime_put_noidle(qspi->dev);
> +		return ret;
> +	}
> +
> +	mutex_lock(&qspi->lock);
> +
> +	writel_relaxed(mask, qspi->io_base + QSPI_PSMKR);
> +	writel_relaxed(match, qspi->io_base + QSPI_PSMAR);
> +	qspi->fmode = CCR_FMODE_APM;
> +	qspi->status_timeout = timeout_ms;
> +
> +	ret = stm32_qspi_send(mem, op);
> +	mutex_unlock(&qspi->lock);
> +
> +	pm_runtime_mark_last_busy(qspi->dev);
> +	pm_runtime_put_autosuspend(qspi->dev);
> +
> +	return ret;
> +}