sysmo-bts
/
barebox
9
0
Fork 0
Code Releases Activity

spi: improve devicetree support 

- 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.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-05-18 12:58:20 +02:00
parent 4b77e455a5
commit 56dd3c6c2a
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/spi/spi.c
View File

@ -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;