firmware: ti_sci: Allow for device shared and exclusive requests
Sysfw provides an option for requesting exclusive access for a
device using the flags MSG_FLAG_DEVICE_EXCLUSIVE. If this flag is
not used, the device is meant to be shared across hosts. Once a device
is requested from a host with this flag set, any request to this
device from a different host will be nacked by sysfw. Current tisci
driver enables this flag for every device requests. But this may not
be true for all the devices. So provide a separate commands in driver
for exclusive and shared device requests.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 303aa6a..eadb91e 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -547,8 +547,14 @@
*/
static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id)
{
- return ti_sci_set_device_state(handle, id,
- MSG_FLAG_DEVICE_EXCLUSIVE,
+ return ti_sci_set_device_state(handle, id, 0,
+ MSG_DEVICE_SW_STATE_ON);
+}
+
+static int ti_sci_cmd_get_device_exclusive(const struct ti_sci_handle *handle,
+ u32 id)
+{
+ return ti_sci_set_device_state(handle, id, MSG_FLAG_DEVICE_EXCLUSIVE,
MSG_DEVICE_SW_STATE_ON);
}
@@ -566,10 +572,17 @@
static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id)
{
return ti_sci_set_device_state(handle, id,
- MSG_FLAG_DEVICE_EXCLUSIVE,
+ 0,
MSG_DEVICE_SW_STATE_RETENTION);
}
+static int ti_sci_cmd_idle_device_exclusive(const struct ti_sci_handle *handle,
+ u32 id)
+{
+ return ti_sci_set_device_state(handle, id, MSG_FLAG_DEVICE_EXCLUSIVE,
+ MSG_DEVICE_SW_STATE_RETENTION);
+}
+
/**
* ti_sci_cmd_put_device() - command to release a device managed by TISCI
* @handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
@@ -583,8 +596,8 @@
*/
static int ti_sci_cmd_put_device(const struct ti_sci_handle *handle, u32 id)
{
- return ti_sci_set_device_state(handle, id,
- 0, MSG_DEVICE_SW_STATE_AUTO_OFF);
+ return ti_sci_set_device_state(handle, id, 0,
+ MSG_DEVICE_SW_STATE_AUTO_OFF);
}
/**
@@ -2632,7 +2645,9 @@
bops->board_config_pm = ti_sci_cmd_set_board_config_pm;
dops->get_device = ti_sci_cmd_get_device;
+ dops->get_device_exclusive = ti_sci_cmd_get_device_exclusive;
dops->idle_device = ti_sci_cmd_idle_device;
+ dops->idle_device_exclusive = ti_sci_cmd_idle_device_exclusive;
dops->put_device = ti_sci_cmd_put_device;
dops->is_valid = ti_sci_cmd_dev_is_valid;
dops->get_context_loss_count = ti_sci_cmd_dev_get_clcnt;
diff --git a/include/linux/soc/ti/ti_sci_protocol.h b/include/linux/soc/ti/ti_sci_protocol.h
index c57802f..842fb59 100644
--- a/include/linux/soc/ti/ti_sci_protocol.h
+++ b/include/linux/soc/ti/ti_sci_protocol.h
@@ -117,7 +117,10 @@
*/
struct ti_sci_dev_ops {
int (*get_device)(const struct ti_sci_handle *handle, u32 id);
+ int (*get_device_exclusive)(const struct ti_sci_handle *handle, u32 id);
int (*idle_device)(const struct ti_sci_handle *handle, u32 id);
+ int (*idle_device_exclusive)(const struct ti_sci_handle *handle,
+ u32 id);
int (*put_device)(const struct ti_sci_handle *handle, u32 id);
int (*is_valid)(const struct ti_sci_handle *handle, u32 id);
int (*get_context_loss_count)(const struct ti_sci_handle *handle,