Re: [PATCH 3/3] spi: spi-fsl-lpspi: support effective_speed_hz
From: Frank Li <Frank.li@nxp.com>
Date: 2024-09-30 15:23:35
Also in:
imx, linux-spi
On Mon, Sep 30, 2024 at 11:30:56AM +0200, Stefan Wahren wrote:
Setting spi_transfer->effective_speed_hz in transfer_one so that SPI client driver can use it. Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
quoted hunk ↗ jump to hunk
--- drivers/spi/spi-fsl-lpspi.c | 6 ++++++ 1 file changed, 6 insertions(+)diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 3b5aa91079ae..5d55ef4d4ba6 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c@@ -92,6 +92,7 @@ struct lpspi_config { u8 prescale; u16 mode; u32 speed_hz; + u32 effective_speed_hz; }; struct fsl_lpspi_data {@@ -351,6 +352,9 @@ static int fsl_lpspi_set_bitrate(struct fsl_lpspi_data *fsl_lpspi) writel(scldiv | (scldiv << 8) | ((scldiv >> 1) << 16), fsl_lpspi->base + IMX7ULP_CCR); + fsl_lpspi->config.effective_speed_hz = perclk_rate / (scldiv + 2) * + (1 << prescale); + dev_dbg(fsl_lpspi->dev, "perclk=%u, speed=%u, prescale=%u, scldiv=%d\n", perclk_rate, config.speed_hz, prescale, scldiv);@@ -750,6 +754,8 @@ static int fsl_lpspi_transfer_one(struct spi_controller *controller, if (ret < 0) return ret; + t->effective_speed_hz = fsl_lpspi->config.effective_speed_hz; + fsl_lpspi_set_cmd(fsl_lpspi); fsl_lpspi->is_first_byte = false; --2.34.1