diff options
| author | Tanmay Shah <[email protected]> | 2023-12-04 13:56:18 -0800 |
|---|---|---|
| committer | Michal Simek <[email protected]> | 2023-12-13 08:58:07 +0100 |
| commit | e2c3e9c2b1dda376c10e991af5ead7404a240682 (patch) | |
| tree | 92d8d8345928178dfd2badc95a261a4a1baa1cdd /drivers/mailbox | |
| parent | cfb41b011dd675564d2ac2f6613e54c999fb8399 (diff) | |
mailbox: add el3 support only for zynqmp platform
If U-Boot is running in Exception Level 3 then use hardcode
register values for mailbox message passing with PMU.
This is only supported for zynqmp platform.
Signed-off-by: Tanmay Shah <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Michal Simek <[email protected]>
Diffstat (limited to 'drivers/mailbox')
| -rw-r--r-- | drivers/mailbox/zynqmp-ipi.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mailbox/zynqmp-ipi.c b/drivers/mailbox/zynqmp-ipi.c index acd0b287dba..e76561f3102 100644 --- a/drivers/mailbox/zynqmp-ipi.c +++ b/drivers/mailbox/zynqmp-ipi.c @@ -81,6 +81,7 @@ struct zynqmp_ipi { void __iomem *remote_res_regs; u32 remote_id; u32 local_id; + bool el3_supported; }; static int zynqmp_ipi_fw_call(struct zynqmp_ipi *ipi_mbox, @@ -115,6 +116,12 @@ static int zynqmp_ipi_send(struct mbox_chan *chan, const void *data) return ret; } + /* Return if EL3 is not supported */ + if (!zynqmp->el3_supported) { + dev_err(chan->dev, "mailbox in EL3 only supported for zynqmp"); + return -EOPNOTSUPP; + } + /* Write trigger interrupt */ writel(IPI_BIT_MASK_PMU0, &ipi_int_apu->trig); @@ -159,6 +166,9 @@ static int zynqmp_ipi_probe(struct udevice *dev) debug("%s(dev=%p)\n", __func__, dev); + if (IS_ENABLED(CONFIG_SPL_BUILD) || of_machine_is_compatible("xlnx,zynqmp")) + zynqmp->el3_supported = true; + /* Get subnode where the regs are defined */ /* Note IPI mailbox node needs to be the first one in DT */ node = ofnode_first_subnode(dev_ofnode(dev)); |