diff options
| author | Kartik <kkartik@nvidia.com> | 2022-04-14 13:05:56 +0530 |
|---|---|---|
| committer | Jassi Brar <jaswinder.singh@linaro.org> | 2022-05-21 11:41:30 -0500 |
| commit | 58919326e72f63c380dc3271dd1cc8bdf1bbe3e4 (patch) | |
| tree | acd829fbdf33e5625b42a336a0d0a34dea4b64fd | |
| parent | 8f585d14030dcf8fbec2f864d189515e8be37a80 (diff) | |
dt-bindings: tegra186-hsp: add type for shared mailboxes
Tegra234 supports sending/receiving 32-bit and 128-bit data over
a shared mailbox. Based on the data size to be used, clients need
to specify the type of shared mailbox in the device tree.
Add a macro for 128-bit shared mailbox. Mailbox clients can use this
macro as a flag in device tree to enable 128-bit data support for a
shared mailbox.
Signed-off-by: Kartik <kkartik@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml | 9 | ||||
| -rw-r--r-- | include/dt-bindings/mailbox/tegra186-hsp.h | 5 |
2 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml b/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml index 9f7a7296b57f..a3e87516d637 100644 --- a/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml +++ b/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml @@ -26,6 +26,15 @@ description: | second cell is used to identify the mailbox that the client is going to use. + For shared mailboxes, the first cell composed of two fields: + - bits 15..8: + A bit mask of flags that further specifies the type of shared + mailbox to be used (based on the data size). If no flag is + specified then, 32-bit shared mailbox is used. + - bits 7..0: + Defines the type of the mailbox to be used. This field should be + TEGRA_HSP_MBOX_TYPE_SM for shared mailboxes. + For doorbells, the second cell specifies the index of the doorbell to use. diff --git a/include/dt-bindings/mailbox/tegra186-hsp.h b/include/dt-bindings/mailbox/tegra186-hsp.h index 3bdec7a84d35..b9ccae2aa9e2 100644 --- a/include/dt-bindings/mailbox/tegra186-hsp.h +++ b/include/dt-bindings/mailbox/tegra186-hsp.h @@ -16,6 +16,11 @@ #define TEGRA_HSP_MBOX_TYPE_AS 0x3 /* + * These define the types of shared mailbox supported based on data size. + */ +#define TEGRA_HSP_MBOX_TYPE_SM_128BIT (1 << 8) + +/* * These defines represent the bit associated with the given master ID in the * doorbell registers. */ |