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firmware: arm_scmi: probe and initialise all the supported protocols

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Now that we have basic support for all the protocols in the
specification, let's probe them individually and initialise them.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla 2017-06-06 11:39:08 +01:00
parent 5179c523c1
commit bc40081d98
1 changed files with 50 additions and 1 deletions
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51
drivers/firmware/arm_scmi/driver.c
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@ -466,6 +466,21 @@ void scmi_setup_protocol_implemented(const struct scmi_handle *handle,
info->protocols_imp = prot_imp;
}
static bool
scmi_is_protocol_implemented(const struct scmi_handle *handle, u8 prot_id)
{
int i;
struct scmi_info *info = handle_to_scmi_info(handle);
if (!info->protocols_imp)
return false;
for (i = 0; i < MAX_PROTOCOLS_IMP; i++)
if (info->protocols_imp[i] == prot_id)
return true;
return false;
}
/**
* scmi_handle_get() - Get the SCMI handle for a device
*
@ -661,6 +676,23 @@ static inline int scmi_mbox_chan_setup(struct scmi_info *info)
return 0;
}
static inline void
scmi_create_protocol_device(struct device_node *np, struct scmi_info *info,
int prot_id)
{
struct scmi_device *sdev;
sdev = scmi_device_create(np, info->dev, prot_id);
if (!sdev) {
dev_err(info->dev, "failed to create %d protocol device\n",
prot_id);
return;
}
/* setup handle now as the transport is ready */
scmi_set_handle(sdev);
}
static int scmi_probe(struct platform_device *pdev)
{
int ret;
@ -668,7 +700,7 @@ static int scmi_probe(struct platform_device *pdev)
const struct scmi_desc *desc;
struct scmi_info *info;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct device_node *child, *np = dev->of_node;
/* Only mailbox method supported, check for the presence of one */
if (scmi_mailbox_check(np)) {
@ -711,6 +743,23 @@ static int scmi_probe(struct platform_device *pdev)
list_add_tail(&info->node, &scmi_list);
mutex_unlock(&scmi_list_mutex);
for_each_available_child_of_node(np, child) {
u32 prot_id;
if (of_property_read_u32(child, "reg", &prot_id))
continue;
prot_id &= MSG_PROTOCOL_ID_MASK;
if (!scmi_is_protocol_implemented(handle, prot_id)) {
dev_err(dev, "SCMI protocol %d not implemented\n",
prot_id);
continue;
}
scmi_create_protocol_device(child, info, prot_id);
}
return 0;
}