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| author | Dawid Niedzwiecki <dn@semihalf.com> | 2021-03-02 14:46:32 +0100 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-03-08 17:31:52 +0000 |
| commit | cfbbbb93b44799c61f5591b9658d650136ab5ac4 (patch) | |
| tree | 40c0a2598c3c8b46f3fb187812d399e5fa3fc2a6 /include/fan.h | |
| parent | 1a7ba0f3822829ad69d860ee41bb4ae756c4756d (diff) | |
| download | chrome-ec-cfbbbb93b44799c61f5591b9658d650136ab5ac4.tar.gz | |
zephyr: add shim fan
Add fan support to Zephyr. The fan is controlled with PWM and the fan
speed is measured with the tachometer. Fan properties are defied in the
dts file. The struct fan_t fans[] array and enum fan_channel are
generated automatically according to named-fans node in the device tree.
The implementation is based on the npxc driver, but it is
platform-independent. It assumes that there are PWM channel to control
the fan and the tachometer sensor to measure RPM (in RPM mode). If it is
not the case in the future, the shim may be split per chip.
Enable fan related console commands - fanduty, fanset, faninfo, fanauto
and host commands - EC_CMD_PWM_GET_FAN_TARGET_RPM,
EC_CMD_PWM_SET_FAN_TARGET_RPM, EC_CMD_PWM_SET_FAN_DUTY,
EC_CMD_THERMAL_AUTO_FAN_CTRL.
BUG=b:174851463
BRANCH=none
TEST=build Zephyr
TEST=Run "fanset"/"fanduty" commands and check with "faninfo" if the fan
follows the command. Then run "fanauto" and verify that the fan controls
the temperature correctly.
Signed-off-by: Dawid Niedzwiecki <dn@semihalf.com>
Change-Id: I52255848e271fb5b204cd1eb8a797e2fbc81130d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2729375
Reviewed-by: Keith Short <keithshort@chromium.org>
Commit-Queue: Keith Short <keithshort@chromium.org>
Diffstat (limited to 'include/fan.h')
| -rw-r--r-- | include/fan.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/fan.h b/include/fan.h index fd49649547..bd92b97254 100644 --- a/include/fan.h +++ b/include/fan.h @@ -8,6 +8,23 @@ #ifndef __CROS_EC_FAN_H #define __CROS_EC_FAN_H +#ifdef CONFIG_ZEPHYR +#ifdef CONFIG_PLATFORM_EC_FAN + +#include <devicetree.h> +#define NODE_ID_AND_COMMA(node_id) node_id, +enum fan_channel { +#if DT_NODE_EXISTS(DT_INST(0, named_fans)) + DT_FOREACH_CHILD(DT_INST(0, named_fans), NODE_ID_AND_COMMA) +#endif /* named_fans */ + FAN_CH_COUNT +}; + +#define CONFIG_FANS FAN_CH_COUNT + +#endif /* CONFIG_PLATFORM_EC_FAN */ +#endif /* CONFIG_ZEPHYR */ + struct fan_conf { unsigned int flags; /* Hardware channel number (the meaning is chip-specific) */ |