diff options
| author | Sudeep Holla <sudeep.holla@arm.com> | 2021-06-02 08:38:50 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2021-06-03 16:46:53 +0100 |
| commit | ed7ecb8839010150e3adb41800d218ef3d62e269 (patch) | |
| tree | e7fb375aefcb635bb7232f4f98919af6571d6d79 | |
| parent | ab7766b72855e6a68109b915d071181b93086e29 (diff) | |
firmware: arm_scpi: Add compatibility checks for shmem node
The shared memory node used for communication between the firmware and
the OS should be compatible with one of the following:
- amlogic,meson-gxbb-scp-shmem
- amlogic,meson-axg-scp-shmem
- arm,juno-scp-shmem
- arm,scp-shmem
Add the check for the same while parsing the node before fetching the memory
regions.
Link: https://lore.kernel.org/r/20210602073851.1005607-1-sudeep.holla@arm.com
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
| -rw-r--r-- | drivers/firmware/arm_scpi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c index d0dee37ad522..cc90a11a69c3 100644 --- a/drivers/firmware/arm_scpi.c +++ b/drivers/firmware/arm_scpi.c @@ -897,6 +897,14 @@ static const struct of_device_id legacy_scpi_of_match[] = { {}, }; +static const struct of_device_id shmem_of_match[] __maybe_unused = { + { .compatible = "amlogic,meson-gxbb-scp-shmem", }, + { .compatible = "amlogic,meson-axg-scp-shmem", }, + { .compatible = "arm,juno-scp-shmem", }, + { .compatible = "arm,scp-shmem", }, + { } +}; + static int scpi_probe(struct platform_device *pdev) { int count, idx, ret; @@ -933,6 +941,9 @@ static int scpi_probe(struct platform_device *pdev) struct mbox_client *cl = &pchan->cl; struct device_node *shmem = of_parse_phandle(np, "shmem", idx); + if (!of_match_node(shmem_of_match, shmem)) + return -ENXIO; + ret = of_address_to_resource(shmem, 0, &res); of_node_put(shmem); if (ret) { |