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spi: spi-fsl-lpspi: support effective_speed_hz

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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>
Link: https://patch.msgid.link/20240930093056.93418-4-wahrenst@gmx.net
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Stefan Wahren
2024-09-30 11:30:56 +02:00
committed by Mark Brown
parent 7086f49dc4
commit 667b5e803a
1 changed files with 6 additions and 0 deletions
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drivers/spi/spi-fsl-lpspi.c
+6
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@@ -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;