remoteproc: k3-r5: Implement is_running operation

Add is_running callback to query the R5F core halt status via the
TI-SCI processor control API. This allows the remoteproc framework
to determine whether the R5F core is currently runnin.

The core is considered running when the PROC_BOOT_CTRL_FLAG_R5_CORE_HALT
bit is not set in the control flags.

Signed-off-by: Philippe Schenker <philippe.schenker@impulsing.ch>
Reviewed-by: Andrew Davis <afd@ti.com>

diff --git a/drivers/remoteproc/ti_k3_r5f_rproc.c b/drivers/remoteproc/ti_k3_r5f_rproc.c
index c6356729e9db120a23d3ae6063c368840b92a816..7326f5a4b30bf1b94e7ef80ab827f0ee040b3280 100644 (file)
--- a/drivers/remoteproc/ti_k3_r5f_rproc.c
+++ b/drivers/remoteproc/ti_k3_r5f_rproc.c
@@ -573,6 +573,22 @@ static void *k3_r5f_da_to_va(struct udevice *dev, ulong da, ulong size, bool *is
        return map_physmem(da, size, MAP_NOCACHE);
 }
 
+static int k3_r5f_is_running(struct udevice *dev)
+{
+       struct k3_r5f_core *core = dev_get_priv(dev);
+       u32 cfg, ctrl, sts;
+       u64 boot_vec;
+       int ret;
+
+       dev_dbg(dev, "%s\n", __func__);
+
+       ret = ti_sci_proc_get_status(&core->tsp, &boot_vec, &cfg, &ctrl, &sts);
+       if (ret)
+               return -1;
+
+       return !!(ctrl & PROC_BOOT_CTRL_FLAG_R5_CORE_HALT);
+}
+
 static int k3_r5f_init(struct udevice *dev)
 {
        return 0;
@@ -590,6 +606,7 @@ static const struct dm_rproc_ops k3_r5f_rproc_ops = {
        .stop = k3_r5f_stop,
        .load = k3_r5f_load,
        .device_to_virt = k3_r5f_da_to_va,
+       .is_running = k3_r5f_is_running,
 };
 
 static int k3_r5f_rproc_configure(struct k3_r5f_core *core)