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Subject[PATCH] ahci: imx: fix building without hwmon or thermal
Date
When CONFIG_HWMON is disabled, we now get a link failure:

ERROR: "devm_hwmon_device_register_with_groups" [drivers/ata/ahci_imx.ko] undefined!
drivers/ata/ahci_imx.o: In function `imx_ahci_probe':
ahci_imx.c:(.text.imx_ahci_probe+0x304): undefined reference to `devm_thermal_zone_of_sensor_register'

This makes the code calling into the hwmon subsystem compile-time
conditional, and adds a Kconfig dependency to avoid the corner
case of having HWMON=m and AHCI_IMX=y, by forcing AHCI_IMX=m in this
case. The thermal subsystem already has a check in its header, but
that also doesn't cover the THERMAL=m case, so we need a somewhat
complex Kconfig expression to handle all cases.

Fixes: 54643a83b41a ("ahci: imx: Add imx53 SATA temperature sensor support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/ata/Kconfig | 1 +
drivers/ata/ahci_imx.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 78c002021029..70b57d2229d6 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -129,6 +129,7 @@ config AHCI_ST
config AHCI_IMX
tristate "Freescale i.MX AHCI SATA support"
depends on MFD_SYSCON && (ARCH_MXC || COMPILE_TEST)
+ depends on (HWMON && (THERMAL || !THERMAL_OF)) || !HWMON
help
This option enables support for the Freescale i.MX SoC's
onboard AHCI SATA.
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index 420f065978dc..787567e840bd 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -774,7 +774,8 @@ static int imx_ahci_probe(struct platform_device *pdev)
if (ret)
return ret;

- if (imxpriv->type == AHCI_IMX53) {
+ if (imxpriv->type == AHCI_IMX53 &&
+ IS_ENABLED(CONFIG_HWMON)) {
/* Add the temperature monitor */
struct device *hwmon_dev;

--
2.9.0
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