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authorAngelos Mouzakitis <a.mouzakitis@virtualopensystems.com>2023-10-10 14:33:42 +0000
committerAngelos Mouzakitis <a.mouzakitis@virtualopensystems.com>2023-10-10 14:33:42 +0000
commitaf1a266670d040d2f4083ff309d732d648afba2a (patch)
tree2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/drivers/reset/reset-raspberrypi.c
parente02cda008591317b1625707ff8e115a4841aa889 (diff)
Add submodule dependency filesHEADmaster
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/drivers/reset/reset-raspberrypi.c')
-rw-r--r--roms/u-boot/drivers/reset/reset-raspberrypi.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/reset/reset-raspberrypi.c b/roms/u-boot/drivers/reset/reset-raspberrypi.c
new file mode 100644
index 000000000..e2d284e5a
--- /dev/null
+++ b/roms/u-boot/drivers/reset/reset-raspberrypi.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Raspberry Pi 4 firmware reset driver
+ *
+ * Copyright (C) 2020 Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+ */
+#include <common.h>
+#include <dm.h>
+#include <reset-uclass.h>
+#include <asm/arch/msg.h>
+#include <dt-bindings/reset/raspberrypi,firmware-reset.h>
+
+static int raspberrypi_reset_request(struct reset_ctl *reset_ctl)
+{
+ if (reset_ctl->id >= RASPBERRYPI_FIRMWARE_RESET_NUM_IDS)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int raspberrypi_reset_free(struct reset_ctl *reset_ctl)
+{
+ return 0;
+}
+
+static int raspberrypi_reset_assert(struct reset_ctl *reset_ctl)
+{
+ switch (reset_ctl->id) {
+ case RASPBERRYPI_FIRMWARE_RESET_ID_USB:
+ bcm2711_notify_vl805_reset();
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int raspberrypi_reset_deassert(struct reset_ctl *reset_ctl)
+{
+ return 0;
+}
+
+struct reset_ops raspberrypi_reset_ops = {
+ .request = raspberrypi_reset_request,
+ .rfree = raspberrypi_reset_free,
+ .rst_assert = raspberrypi_reset_assert,
+ .rst_deassert = raspberrypi_reset_deassert,
+};
+
+static const struct udevice_id raspberrypi_reset_ids[] = {
+ { .compatible = "raspberrypi,firmware-reset" },
+ { }
+};
+
+U_BOOT_DRIVER(raspberrypi_reset) = {
+ .name = "raspberrypi-reset",
+ .id = UCLASS_RESET,
+ .of_match = raspberrypi_reset_ids,
+ .ops = &raspberrypi_reset_ops,
+};
+