diff options
Diffstat (limited to 'recipes-bsp/u-boot/u-boot-v2012.04.01/0040-spi-mxs-Introduce-spi_cs_is_valid.patch')
| -rw-r--r-- | recipes-bsp/u-boot/u-boot-v2012.04.01/0040-spi-mxs-Introduce-spi_cs_is_valid.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/recipes-bsp/u-boot/u-boot-v2012.04.01/0040-spi-mxs-Introduce-spi_cs_is_valid.patch b/recipes-bsp/u-boot/u-boot-v2012.04.01/0040-spi-mxs-Introduce-spi_cs_is_valid.patch new file mode 100644 index 0000000..5af00e8 --- /dev/null +++ b/recipes-bsp/u-boot/u-boot-v2012.04.01/0040-spi-mxs-Introduce-spi_cs_is_valid.patch @@ -0,0 +1,47 @@ +From 99e963384668bdd678cea944c02ce47d223e7f0d Mon Sep 17 00:00:00 2001 +From: Fabio Estevam <fabio.estevam@freescale.com> +Date: Mon, 23 Apr 2012 08:30:49 +0000 +Subject: [PATCH 40/56] spi: mxs: Introduce spi_cs_is_valid() + +Introduce spi_cs_is_valid() for validating spi bus and chip select numbers. + +Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> +Acked-by: Marek Vasut <marex@denx.de> +Acked-by: Mike Frysinger <vapier@gentoo.org> +--- + drivers/spi/mxs_spi.c | 13 +++++++++++-- + 1 file changed, 11 insertions(+), 2 deletions(-) + +diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c +index 4e6f14e..e7237e7 100644 +--- a/drivers/spi/mxs_spi.c ++++ b/drivers/spi/mxs_spi.c +@@ -51,14 +51,23 @@ void spi_init(void) + { + } + ++int spi_cs_is_valid(unsigned int bus, unsigned int cs) ++{ ++ /* MXS SPI: 4 ports and 3 chip selects maximum */ ++ if (bus > 3 || cs > 2) ++ return 0; ++ else ++ return 1; ++} ++ + struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int mode) + { + struct mxs_spi_slave *mxs_slave; + uint32_t addr; + +- if (bus > 3) { +- printf("MXS SPI: Max bus number is 3\n"); ++ if (!spi_cs_is_valid(bus, cs)) { ++ printf("mxs_spi: invalid bus %d / chip select %d\n", bus, cs); + return NULL; + } + +-- +1.7.10 + |