Part Number: OMAP-L138
Other Parts Discussed in Thread: OMAPL138
We are designing a custom board based on omap-l138 lckd and we want this board to boot from a spi flash (SST25VF080B) connected on SPI1.
For testing this solution, on the eval-board I have connected the SPI Flash on SPI1 bus with SPI1_SCSn_0.
This SPI bus is available as the fingerprint sensor is no more connected.
Before testing the boot, I wanted to verify that the Flash was detected by u-boot.
So, I configured the omap to boot from sdcard and I have recompiled uboot (from ti-processor-sdk-linux-omapl138-lcdk-05.02.00.10) with some modifications.
When I try to probe the flash (sf probe 1:2), there is an error "Failed to initialize SPI flash at 1:2".
On the scope, I don't see any signal changing state (MISO, MOSI, CSn, SCK).
I don't know if the modifications I have made are correct and sufficient.
diff --git a/board/davinci/da8xxevm/omapl138_lcdk.c b/board/davinci/da8xxevm/omapl138_lcdk.c
index 5650207..0405a46 100644
--- a/board/davinci/da8xxevm/omapl138_lcdk.c
+++ b/board/davinci/da8xxevm/omapl138_lcdk.c
@@ -75,6 +75,16 @@ static const struct pinmux_config emac_pins[] = {
};
#endif /* CONFIG_DRIVER_TI_EMAC */
+const struct pinmux_config spi1_pins_base[] = {
+ { pinmux(5), 1, 2 }, /* SPI1_CLK */
+ { pinmux(5), 1, 4 }, /* SPI1_SOMI */
+ { pinmux(5), 1, 5 }, /* SPI1_SIMO */
+};
+
+const struct pinmux_config spi1_pins_scs0[] = {
+ { pinmux(5), 1, 1 }, /* SPI1_SCS[0] */
+};
+
/* I2C pin muxer settings */
static const struct pinmux_config i2c_pins[] = {
{ pinmux(4), 2, 2 },
@@ -121,6 +131,9 @@ const struct pinmux_resource pinmuxes[] = {
#ifdef CONFIG_NAND_DAVINCI
PINMUX_ITEM(nand_pins),
#endif
+
+ PINMUX_ITEM(spi1_pins_base),
+ PINMUX_ITEM(spi1_pins_scs0),
};
const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
Second question, what are the modifications and configuration needed to do a Boot from SPI ?
