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mach-snapdragon: implement ft_board_setup() for USB role selection

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Some Qualcomm boards have only one USB controller which is muxed between
the type-c port and an internal USB hub for type-A and ethernet. We
modify the DT for these to force them to host mode in U-Boot. However in
Linux DRD role switching is supported (required, even). Use
ft_board_setup() to adjust the dr_mode property for these boards.

While we're here, define pr_fmt for this file so we can more easily
identify log messages.

Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
This commit is contained in:
Caleb Connolly 2024-04-18 18:25:49 +01:00
parent 956f6e4de4
commit e64503f1fc
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1 changed files with 20 additions and 0 deletions
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20
arch/arm/mach-snapdragon/of_fixup.c
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@ -17,6 +17,8 @@
* Author: Caleb Connolly <caleb.connolly@linaro.org>
*/
#define pr_fmt(fmt) "of_fixup: " fmt
#include <dt-bindings/input/linux-event-codes.h>
#include <dm/of_access.h>
#include <dm/of.h>
@ -153,3 +155,21 @@ void qcom_of_fixup_nodes(void)
time_call(fixup_usb_nodes);
time_call(fixup_power_domains);
}
int ft_board_setup(void *blob, struct bd_info __maybe_unused *bd)
{
struct fdt_header *fdt = blob;
int node;
/* We only want to do this fix-up for the RB1 board, quick return for all others */
if (!fdt_node_check_compatible(fdt, 0, "qcom,qrb4210-rb2"))
return 0;
fdt_for_each_node_by_compatible(node, blob, 0, "snps,dwc3") {
log_debug("%s: Setting 'dr_mode' to OTG\n", fdt_get_name(blob, node, NULL));
fdt_setprop_string(fdt, node, "dr_mode", "otg");
break;
}
return 0;
}