From 671c3bf50ae498dc12aef6c70abe5cfa066b1348 Mon Sep 17 00:00:00 2001 From: Chuanhong Guo Date: Fri, 6 Mar 2020 16:50:49 +0800 Subject: [PATCH 1/2] spi: make spi-max-frequency optional We only need a spi-max-frequency when we specifically request a spi frequency lower than the max speed of spi host. This property is already documented as optional property and current host drivers are implemented to operate at highest speed possible when spi->max_speed_hz is 0. This patch makes spi-max-frequency an optional property so that we could just omit it to use max controller speed. Signed-off-by: Chuanhong Guo Link: https://lore.kernel.org/r/20200306085052.28258-2-gch981213@gmail.com Signed-off-by: Mark Brown --- drivers/spi/spi.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1802,13 +1802,8 @@ static int of_spi_parse_dt(struct spi_co spi->mode |= SPI_CS_HIGH; /* Device speed */ - rc = of_property_read_u32(nc, "spi-max-frequency", &value); - if (rc) { - dev_err(&ctlr->dev, - "%pOF has no valid 'spi-max-frequency' property (%d)\n", nc, rc); - return rc; - } - spi->max_speed_hz = value; + if (!of_property_read_u32(nc, "spi-max-frequency", &value)) + spi->max_speed_hz = value; return 0; }