- zero spi_board_info structure to not accidently pass
unitilialized fields
- parse spi-max-frequency property from devicetree
- parse mode flags from devicetree
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
drivers/spi/spi.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index d58b664..f460a7a 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -108,9 +108,20 @@ void spi_of_register_slaves(struct spi_master *master,
struct device_node *node)
struct property *reg;
device_node_for_nach_child(node, n) {
- chip.name = n->name;
+ memset(&chip, 0, sizeof(chip));
+ chip.name = xstrdup(n->name);
chip.bus_num = master->bus_num;
- chip.max_speed_hz = 300000; /* FIXME */
+ /* Mode (clock phase/polarity/etc.) */
+ if (of_find_property(n, "spi-cpha"))
+ chip.mode |= SPI_CPHA;
+ if (of_find_property(n, "spi-cpol"))
+ chip.mode |= SPI_CPOL;
+ if (of_find_property(n, "spi-cs-high"))
+ chip.mode |= SPI_CS_HIGH;
+ if (of_find_property(n, "spi-3wire"))
+ chip.mode |= SPI_3WIRE;
+ of_property_read_u32(n, "spi-max-frequency",
+ &chip.max_speed_hz);
reg = of_find_property(n, "reg");
if (!reg)
continue;
--
1.8.2.rc2
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