plat/palmetto: Add shutdown and reboot

Rebooting and power down for the Palmetto is done by the BMC, which we
speak to over the BT interface using IPMI. Implement the IPMI chassis
commands which are used for power control, and hook them up to the
palmetto platform callbacks for shutdown and reboot.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/platforms/bmc/palmetto.c b/platforms/bmc/palmetto.c
index 50e2050..f0a0c86 100644
--- a/platforms/bmc/palmetto.c
+++ b/platforms/bmc/palmetto.c
@@ -209,10 +209,29 @@ static bool palmetto_probe(void)
 	return true;
 }
 
+static int64_t palmetto_ipmi_power_down(uint64_t request __unused)
+{
+	/* Request is:
+	 *  0 = normal
+	 *  1 = immediate
+	 * When doing "shutdown -h now" from linux, we get a 0.
+	 * However, I believe at that point we are ready to shut down,
+	 * so unconditionally tell the BMC to immediately power us down.
+	 */
+	return ipmi_opal_chassis_request(IPMI_SET_CHASSIS_PWR_DOWN_CMD);
+}
+
+static int64_t palmetto_ipmi_reboot(void)
+{
+	return ipmi_opal_chassis_request(IPMI_SET_CHASSIS_PWR_CYCLE_CMD);
+}
+
 DECLARE_PLATFORM(palmetto) = {
 	.name			= "Palmetto",
 	.probe			= palmetto_probe,
 	.init			= palmetto_init,
 	.external_irq		= palmetto_ext_irq,
+	.cec_power_down         = palmetto_ipmi_power_down,
+	.cec_reboot             = palmetto_ipmi_reboot,
 };