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authorSimon Glass <sjg@chromium.org>2013-12-03 16:43:24 -0700
committerSimon Glass <sjg@chromium.org>2013-12-09 12:22:12 -0700
commit0efc02499f9131bd7e1689ebb8d626ef12387de4 (patch)
treed6b4296f983ebe381432d7db3b12e4368ec0efe9 /drivers
parent7b3efc66996b6686ad393b706c323990afa31930 (diff)
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spi_flash: Add spi_flash_probe_fdt() to locate SPI by FDT node
This allows us to put the SPI flash chip inside the SPI interface node, with U-Boot finding the correct bus and chip select automatically. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/misc/cros_ec_spi.c3
-rw-r--r--drivers/mtd/spi/sf_probe.c25
-rw-r--r--drivers/spi/exynos_spi.c10
-rw-r--r--drivers/spi/spi.c19
4 files changed, 46 insertions, 11 deletions
diff --git a/drivers/misc/cros_ec_spi.c b/drivers/misc/cros_ec_spi.c
index 202acf2..2fc9110 100644
--- a/drivers/misc/cros_ec_spi.c
+++ b/drivers/misc/cros_ec_spi.c
@@ -135,8 +135,7 @@ int cros_ec_spi_decode_fdt(struct cros_ec_dev *dev, const void *blob)
*/
int cros_ec_spi_init(struct cros_ec_dev *dev, const void *blob)
{
- dev->spi = spi_setup_slave_fdt(blob, dev->parent_node,
- dev->cs, dev->max_frequency, 0);
+ dev->spi = spi_setup_slave_fdt(blob, dev->parent_node, dev->node);
if (!dev->spi) {
debug("%s: Could not setup SPI slave\n", __func__);
return -1;
diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
index 5eb8ffe..ca12715 100644
--- a/drivers/mtd/spi/sf_probe.c
+++ b/drivers/mtd/spi/sf_probe.c
@@ -285,16 +285,13 @@ int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
}
#endif /* CONFIG_OF_CONTROL */
-struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
- unsigned int max_hz, unsigned int spi_mode)
+static struct spi_flash *spi_flash_probe_slave(struct spi_slave *spi)
{
- struct spi_slave *spi;
struct spi_flash *flash = NULL;
u8 idcode[5];
int ret;
/* Setup spi_slave */
- spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
if (!spi) {
printf("SF: Failed to set up slave\n");
return NULL;
@@ -358,6 +355,26 @@ err_claim_bus:
return NULL;
}
+struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int spi_mode)
+{
+ struct spi_slave *spi;
+
+ spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
+ return spi_flash_probe_slave(spi);
+}
+
+#ifdef CONFIG_OF_SPI_FLASH
+struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
+ int spi_node)
+{
+ struct spi_slave *spi;
+
+ spi = spi_setup_slave_fdt(blob, slave_node, spi_node);
+ return spi_flash_probe_slave(spi);
+}
+#endif
+
void spi_flash_free(struct spi_flash *flash)
{
spi_free_slave(flash->spi);
diff --git a/drivers/spi/exynos_spi.c b/drivers/spi/exynos_spi.c
index 699c57e..4d5def2 100644
--- a/drivers/spi/exynos_spi.c
+++ b/drivers/spi/exynos_spi.c
@@ -529,18 +529,18 @@ static int process_nodes(const void *blob, int node_list[], int count)
* @param node SPI peripheral node to use
* @return 0 if ok, -1 on error
*/
-struct spi_slave *spi_setup_slave_fdt(const void *blob, int node,
- unsigned int cs, unsigned int max_hz, unsigned int mode)
+struct spi_slave *spi_setup_slave_fdt(const void *blob, int slave_node,
+ int spi_node)
{
struct spi_bus *bus;
unsigned int i;
for (i = 0, bus = spi_bus; i < bus_count; i++, bus++) {
- if (bus->node == node)
- return spi_setup_slave(i, cs, max_hz, mode);
+ if (bus->node == spi_node)
+ return spi_base_setup_slave_fdt(blob, i, slave_node);
}
- debug("%s: Failed to find bus node %d\n", __func__, node);
+ debug("%s: Failed to find bus node %d\n", __func__, spi_node);
return NULL;
}
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index b76a26c..7ddea9b 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -5,6 +5,7 @@
*/
#include <common.h>
+#include <fdtdec.h>
#include <malloc.h>
#include <spi.h>
@@ -37,3 +38,21 @@ void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
return ptr;
}
+
+#ifdef CONFIG_OF_SPI
+struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum,
+ int node)
+{
+ int cs, max_hz, mode = 0;
+
+ cs = fdtdec_get_int(blob, node, "reg", -1);
+ max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 100000);
+ if (fdtdec_get_bool(blob, node, "spi-cpol"))
+ mode |= SPI_CPOL;
+ if (fdtdec_get_bool(blob, node, "spi-cpha"))
+ mode |= SPI_CPHA;
+ if (fdtdec_get_bool(blob, node, "spi-cs-high"))
+ mode |= SPI_CS_HIGH;
+ return spi_setup_slave(busnum, cs, max_hz, mode);
+}
+#endif