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firmware: arm_scmi: Add support for multiple device per protocol

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Currently only one scmi device is created for each protocol enumerated.
However, there is requirement to make use of some procotols by multiple
kernel subsystems/frameworks. One such example is SCMI PERFORMANCE
protocol which can be used by both cpufreq and devfreq drivers.
Similarly, SENSOR protocol may be used by hwmon and iio subsystems,
and POWER protocol may be used by genpd and regulator drivers.

In order to achieve that, let us extend the scmi bus to match based
not only protocol id but also the scmi device name if one is available.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla
2018-12-21 18:08:08 +00:00
parent e42617b825
commit ee7a9c9f67
3 changed files with 24 additions and 7 deletions
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5
include/linux/scmi_protocol.h
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@@ -257,6 +257,7 @@ enum scmi_std_protocol {
struct scmi_device {
u32 id;
u8 protocol_id;
const char *name;
struct device dev;
struct scmi_handle *handle;
};
@@ -264,11 +265,13 @@ struct scmi_device {
#define to_scmi_dev(d) container_of(d, struct scmi_device, dev)
struct scmi_device *
scmi_device_create(struct device_node *np, struct device *parent, int protocol);
scmi_device_create(struct device_node *np, struct device *parent, int protocol,
const char *name);
void scmi_device_destroy(struct scmi_device *scmi_dev);
struct scmi_device_id {
u8 protocol_id;
const char *name;
};
struct scmi_driver {