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authorJarkko Nikula <jarkko.nikula@linux.intel.com>2016-04-26 10:08:26 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-05-18 17:06:46 -0700
commitca100af95931ebf2610b47ff2c311fe2c5e43495 (patch)
tree39d627235f855f3e2c9d5ff391776d7b59683b51 /drivers/spi
parent90204cbb4890422facac52ed197b169eb1f26c9f (diff)
spi: pxa2xx: Do not detect number of enabled chip selects on Intel SPT
commit 66ec246eb9982e7eb8e15e1fc55f543230310dd0 upstream. Certain Intel Sunrisepoint PCH variants report zero chip selects in SPI capabilities register even they have one per port. Detection in pxa2xx_spi_probe() sets master->num_chipselect to 0 leading to -EINVAL from spi_register_master() where chip select count is validated. Fix this by not using SPI capabilities register on Sunrisepoint. They don't have more than one chip select so use the default value 1 instead of detection. Fixes: 8b136baa5892 ("spi: pxa2xx: Detect number of enabled Intel LPSS SPI chip select signals") Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-pxa2xx.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index b25dc71b0ea9..73c8ea0b1360 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -111,7 +111,7 @@ static const struct lpss_config lpss_platforms[] = {
.reg_general = -1,
.reg_ssp = 0x20,
.reg_cs_ctrl = 0x24,
- .reg_capabilities = 0xfc,
+ .reg_capabilities = -1,
.rx_threshold = 1,
.tx_threshold_lo = 32,
.tx_threshold_hi = 56,