Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Hugo Villeneuve <> | Date | Thu, 21 Dec 2023 18:18:10 -0500 | Subject | [PATCH v2 03/16] serial: sc16is7xx: set safe default SPI clock frequency |
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From: Hugo Villeneuve <hvilleneuve@dimonoff.com>
15 MHz is supported only by 76x variants.
If the SPI clock frequency is not specified, use a safe default clock value of 4 MHz that is supported by all variants.
Also use HZ_PER_MHZ macro to improve readability.
Fixes: 2c837a8a8f9f ("sc16is7xx: spi interface is added") Cc: stable@vger.kernel.org Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com> --- drivers/tty/serial/sc16is7xx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 798fa115b28a..ced2446909a2 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -24,6 +24,7 @@ #include <linux/tty_flip.h> #include <linux/spi/spi.h> #include <linux/uaccess.h> +#include <linux/units.h> #include <uapi/linux/sched/types.h> #define SC16IS7XX_NAME "sc16is7xx" @@ -1738,7 +1739,7 @@ static int sc16is7xx_spi_probe(struct spi_device *spi) return dev_err_probe(&spi->dev, -EINVAL, "Unsupported SPI mode\n"); spi->mode = spi->mode ? : SPI_MODE_0; - spi->max_speed_hz = spi->max_speed_hz ? : 15000000; + spi->max_speed_hz = spi->max_speed_hz ? : 4 * HZ_PER_MHZ; ret = spi_setup(spi); if (ret) return ret; -- 2.39.2
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