linux-kernel - [PATCH] firmware: arm_scmi: fix psci dependency

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Date:   Thu,  7 May 2020 15:49:05 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Peng Fan <peng.fan@....com>, Arnd Bergmann <arnd@...db.de>,
        linux-kernel@...r.kernel.org
Cc:     Sudeep Holla <sudeep.holla@....com>, Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] firmware: arm_scmi: fix psci dependency

When CONFIG_ARM_PSCI_FW is disabled but CONFIG_HAVE_ARM_SMCCC is enabled,
arm-scmi runs into a link failure:

arm-linux-gnueabi-ld: drivers/firmware/arm_scmi/smc.o: in function `smc_send_message':
smc.c:(.text+0x200): undefined reference to `arm_smccc_1_1_get_conduit'

Change from HAVE_ARM_SMCCC to ARM_PSCI_FW config dependency for now.
We rely on PSCI bindings anyways for the conduit and this should be
fine.

Fixes: 1dc6558062da ("firmware: arm_scmi: Add smc/hvc transport")
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 drivers/firmware/arm_scmi/Makefile | 2 +-
 drivers/firmware/arm_scmi/driver.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

Hi Arnd,

I am planning to push this patch in favour of [1]. Once we have a
separate config[2] for SMCCC v1.1+, I will change to use it instead of
ARM_PSCI_FW.

Regards,
Sudeep

[1] https://lore.kernel.org/r/20200505140820.536615-1-arnd@arndb.de
[2] https://lore.kernel.org/r/20200506164411.3284-1-sudeep.holla@arm.com/


diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile
index 11b238f81923..1cad32b38b29 100644
--- a/drivers/firmware/arm_scmi/Makefile
+++ b/drivers/firmware/arm_scmi/Makefile
@@ -4,6 +4,6 @@ scmi-bus-y = bus.o
 scmi-driver-y = driver.o
 scmi-transport-y = shmem.o
 scmi-transport-$(CONFIG_MAILBOX) += mailbox.o
-scmi-transport-$(CONFIG_HAVE_ARM_SMCCC) += smc.o
+scmi-transport-$(CONFIG_ARM_PSCI_FW) += smc.o
 scmi-protocols-y = base.o clock.o perf.o power.o reset.o sensors.o
 obj-$(CONFIG_ARM_SCMI_POWER_DOMAIN) += scmi_pm_domain.o
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index fec308e47b9d..7483cacf63f9 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -901,7 +901,7 @@ ATTRIBUTE_GROUPS(versions);
 /* Each compatible listed below must have descriptor associated with it */
 static const struct of_device_id scmi_of_match[] = {
 	{ .compatible = "arm,scmi", .data = &scmi_mailbox_desc },
-#ifdef CONFIG_HAVE_ARM_SMCCC
+#ifdef CONFIG_ARM_PSCI_FW
 	{ .compatible = "arm,scmi-smc", .data = &scmi_smc_desc},
 #endif
 	{ /* Sentinel */ },
-- 
2.17.1