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| author | Eugen Hristev <eugen.hristev@microchip.com> | 2019-05-03 16:24:21 +0300 |
|---|---|---|
| committer | Eugen Hristev <eugen.hristev@microchip.com> | 2019-05-15 09:34:22 +0300 |
| commit | 2950c514e8fc2c9d6a48cd7187521bc648dc679e (patch) | |
| tree | cc707dd99982e542f2ea64afb89a71f1c0ffffcf /board/atmel | |
| parent | 57fbd36c668dfe0bff7eb2bca9c0d3d625f84185 (diff) | |
| download | u-boot-2950c514e8fc2c9d6a48cd7187521bc648dc679e.tar.gz | |
board: atmel: sama5d2_icp: standby disable on CAN transceivers in SPL
The 2 CAN transceivers have a STBDY pin which must be low in order to
operate.
This pin is tied to PB25.
Set it to 0 in bootstrap.
At a later time, this needs to be controlled by Linux power management
system, or requested by some driver as a gpio and tied to 0 during
CAN link up.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Diffstat (limited to 'board/atmel')
| -rw-r--r-- | board/atmel/sama5d2_icp/sama5d2_icp.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/board/atmel/sama5d2_icp/sama5d2_icp.c b/board/atmel/sama5d2_icp/sama5d2_icp.c index 1c28aaba85..f55ea2c6f8 100644 --- a/board/atmel/sama5d2_icp/sama5d2_icp.c +++ b/board/atmel/sama5d2_icp/sama5d2_icp.c @@ -73,6 +73,12 @@ int misc_init_r(void) /* SPL */ #ifdef CONFIG_SPL_BUILD +/* must set PB25 low to enable the CAN transceivers */ +static void board_can_stdby_dis(void) +{ + atmel_pio4_set_pio_output(AT91_PIO_PORTB, 25, 0); +} + /* deassert reset lines for external periph in case of warm reboot */ static void board_reset_additional_periph(void) { @@ -111,6 +117,7 @@ void spl_board_init(void) spl_mmc_init(); #endif board_reset_additional_periph(); + board_can_stdby_dis(); } void spl_display_print(void) |