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board: ti: dra7xx: Select MCAN instead of DCAN on DRA76 EVM

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MCAN can be accessed via DCAN1 or DCAN2. Determining which DCAN instance
to use if any at all is done through
CTRL_CORE_CONTROL_SPARE_RW.SEL_ALT_MCAN. Since general pinmuxing is
handled in U-boot. Handle this additional pinmuxing requirement in U-boot
to ensure that MCAN is used by default via the DCAN1 pins.

Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
[fcooper@ti.com: Update commit message and use DCAN1 not DCAN2 for MCAN]
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
This commit is contained in:
Vignesh R 2017-12-12 17:14:27 +05:30 committed by Tom Rini
parent 29171dcfaa
commit e36edcec0a
2 changed files with 8 additions and 0 deletions
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3
arch/arm/include/asm/arch-omap5/mux_dra7xx.h
View File

@ -351,4 +351,7 @@
#define NMIN_DSP 0x460
#define RSTOUTN 0x464
#define MCAN_SEL_ALT_MASK 0x6000
#define MCAN_SEL 0x2000
#endif /* _MUX_DRA7XX_H_ */

5
board/ti/dra7xx/evm.c
View File

@ -823,6 +823,11 @@ void recalibrate_iodelay(void)
do_set_mux32((*ctrl)->control_padconf_core_base,
delta_pads, delta_npads);
if (is_dra76x())
/* Set mux for MCAN instead of DCAN1 */
clrsetbits_le32((*ctrl)->control_core_control_spare_rw,
MCAN_SEL_ALT_MASK, MCAN_SEL);
/* Setup IOdelay configuration */
ret = do_set_iodelay((*ctrl)->iodelay_config_base, iodelay, niodelays);
err: