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fix cs_gpio SPI support

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This commit is contained in:
Martin Ayotte 2019-04-10 17:38:57 -04:00
parent 45f58905d6
commit 9f68190d34
1 changed files with 24 additions and 0 deletions
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24
patch/kernel/sunxi-dev/general-fix-cs_gpio-spi-support.patch Normal file
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@ -0,0 +1,24 @@
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 9a7def7..08c6a05 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2884,6 +2884,19 @@ int spi_setup(struct spi_device *spi)
if (spi->controller->setup)
status = spi->controller->setup(spi);
+ if (gpio_is_valid(spi->cs_gpio)) {
+ dev_info(&spi->dev, "spi_setup / gpio_is_valid(%d) ... doing gpio_request ...\n", spi->cs_gpio);
+ int ret = gpio_request(spi->cs_gpio, dev_name(&spi->dev));
+ if (ret) {
+ dev_err(&spi->dev, "failed to request gpio\n");
+ }
+ else {
+ gpio_direction_output(spi->cs_gpio,
+ !(spi->mode & SPI_CS_HIGH));
+ dev_info(&spi->dev, "spi_setup / gpio_direction_output(%d) done !\n", spi->cs_gpio);
+ }
+ }
+
spi_set_cs(spi, false);
dev_dbg(&spi->dev, "setup mode %d, %s%s%s%s%u bits/w, %u Hz max --> %d\n",