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| author | Hugo Villeneuve <hvilleneuve@dimonoff.com> | 2023-12-21 18:18:10 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-25 15:27:44 -0800 |
| commit | d2ba8eea74af63f6104c1044a881ede07218a111 (patch) | |
| tree | 994ae125e45c516daf1f9d5a0e1bfa451ebf1b0e /drivers | |
| parent | 4f61154a683de9bf31254ea4e5820b00fe3bdf0d (diff) | |
| download | linux-d2ba8eea74af63f6104c1044a881ede07218a111.tar.gz linux-d2ba8eea74af63f6104c1044a881ede07218a111.tar.bz2 linux-d2ba8eea74af63f6104c1044a881ede07218a111.zip | |
serial: sc16is7xx: set safe default SPI clock frequency
commit 3ef79cd1412236d884ab0c46b4d1921380807b48 upstream.
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>
Link: https://lore.kernel.org/r/20231221231823.2327894-4-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/sc16is7xx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 88d585769762..db33790e6675 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" @@ -1721,7 +1722,7 @@ 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; |