6.10-stable review patch. If anyone has any objections, please let me know.
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From: Stefan Wahren wahrenst@gmx.net
commit ff949d981c775332be94be70397ee1df20bc68e5 upstream.
The commit 783bf5d09f86 ("spi: spi-fsl-lpspi: limit PRESCALE bit in TCR register") doesn't implement the prescaler maximum as intended. The maximum allowed value for i.MX93 should be 1 and for i.MX7ULP it should be 7. So this needs also a adjustment of the comparison in the scldiv calculation.
Fixes: 783bf5d09f86 ("spi: spi-fsl-lpspi: limit PRESCALE bit in TCR register") Signed-off-by: Stefan Wahren wahrenst@gmx.net Link: https://patch.msgid.link/20240905111537.90389-1-wahrenst@gmx.net Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/spi/spi-fsl-lpspi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -136,7 +136,7 @@ static struct fsl_lpspi_devtype_data imx };
static struct fsl_lpspi_devtype_data imx7ulp_lpspi_devtype_data = { - .prescale_max = 8, + .prescale_max = 7, };
static const struct of_device_id fsl_lpspi_dt_ids[] = { @@ -336,7 +336,7 @@ static int fsl_lpspi_set_bitrate(struct
div = DIV_ROUND_UP(perclk_rate, config.speed_hz);
- for (prescale = 0; prescale < prescale_max; prescale++) { + for (prescale = 0; prescale <= prescale_max; prescale++) { scldiv = div / (1 << prescale) - 2; if (scldiv < 256) { fsl_lpspi->config.prescale = prescale;