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| author | Anatolij Gustschin <agust@denx.de> | 2018-04-15 11:33:08 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-01 12:58:24 -0700 |
| commit | 9922fd0c681f4755422900c529290d393229d38d (patch) | |
| tree | e1dc8c999802199669f599310c3225186e821ace | |
| parent | 7563d6f2be58010edecd145faa06bcd82251caa0 (diff) | |
| download | linux-stable-9922fd0c681f4755422900c529290d393229d38d.tar.gz linux-stable-9922fd0c681f4755422900c529290d393229d38d.tar.bz2 linux-stable-9922fd0c681f4755422900c529290d393229d38d.zip | |
fpga-manager: altera-ps-spi: preserve nCONFIG state
commit 881c93c0fb73328845898344208fa0bf0d62cac6 upstream.
If the driver module is loaded when FPGA is configured, the FPGA
is reset because nconfig is pulled low (low-active gpio inited
with GPIOD_OUT_HIGH activates the signal which means setting its
value to low). Init nconfig with GPIOD_OUT_LOW to prevent this.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Cc: stable <stable@vger.kernel.org> # 4.14+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/fpga/altera-ps-spi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/fpga/altera-ps-spi.c b/drivers/fpga/altera-ps-spi.c index 14f14efdf0d5..06d212a3d49d 100644 --- a/drivers/fpga/altera-ps-spi.c +++ b/drivers/fpga/altera-ps-spi.c @@ -249,7 +249,7 @@ static int altera_ps_probe(struct spi_device *spi) conf->data = of_id->data; conf->spi = spi; - conf->config = devm_gpiod_get(&spi->dev, "nconfig", GPIOD_OUT_HIGH); + conf->config = devm_gpiod_get(&spi->dev, "nconfig", GPIOD_OUT_LOW); if (IS_ERR(conf->config)) { dev_err(&spi->dev, "Failed to get config gpio: %ld\n", PTR_ERR(conf->config)); |