diff options
| author | Tudor Ambarus <tudor.ambarus@linaro.org> | 2025-01-15 14:18:15 +0000 |
|---|---|---|
| committer | Jassi Brar <jassisinghbrar@gmail.com> | 2025-01-18 16:18:48 -0600 |
| commit | fbf7e5ce408e0619072e84e93e875de52f2b5fa5 (patch) | |
| tree | 7a475d152ed571ae835af3d33d209f2257696844 /include/linux | |
| parent | 56cf1209f61c08cb210d993434255efcb6a907a5 (diff) | |
mailbox: add Samsung Exynos driver
The Samsung Exynos mailbox controller, used on Google GS101 SoC, has 16
flag bits for hardware interrupt generation and a shared register for
passing mailbox messages. When the controller is used by the
ACPM interface the shared register is ignored and the mailbox controller
acts as a doorbell. The controller just raises the interrupt to APM
after the ACPM interface has written the message to SRAM.
Add support for the Samsung Exynos mailbox controller.
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mailbox/exynos-message.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/mailbox/exynos-message.h b/include/linux/mailbox/exynos-message.h new file mode 100644 index 000000000000..5a9ed5ce2046 --- /dev/null +++ b/include/linux/mailbox/exynos-message.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Exynos mailbox message. + * + * Copyright 2024 Linaro Ltd. + */ + +#ifndef _LINUX_EXYNOS_MESSAGE_H_ +#define _LINUX_EXYNOS_MESSAGE_H_ + +#define EXYNOS_MBOX_CHAN_TYPE_DOORBELL 0 +#define EXYNOS_MBOX_CHAN_TYPE_DATA 1 + +struct exynos_mbox_msg { + unsigned int chan_id; + unsigned int chan_type; +}; + +#endif /* _LINUX_EXYNOS_MESSAGE_H_ */ |