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authorTony Lindgren <tony@atomide.com>2021-03-08 12:35:09 +0300
committerTony Lindgren <tony@atomide.com>2021-03-10 14:59:17 +0300
commit5f7259a578e9c6759255996b86be5bed41d62193 (patch)
tree4306dcd0204981b913c04a343d2b393522b80215 /drivers/bus/ti-sysc.c
parentf2dc0755fc9b4628d38e4832ecf207ce135b93ae (diff)
downloadlinux-5f7259a578e9c6759255996b86be5bed41d62193.tar.xz
bus: ti-sysc: Check for old incomplete dtb
Let's be nice and show an error on the SoCs about old imcomplete devicetree if the dtb is still using "simple-bus" instead of "simple-pm-bus" for the root OCP node. Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/bus/ti-sysc.c')
-rw-r--r--drivers/bus/ti-sysc.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index b715e5901373..65943d1a2557 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -2858,6 +2858,7 @@ static int sysc_init_soc(struct sysc *ddata)
const struct soc_device_attribute *match;
struct ti_sysc_platform_data *pdata;
unsigned long features = 0;
+ struct device_node *np;
if (sysc_soc)
return 0;
@@ -2878,6 +2879,21 @@ static int sysc_init_soc(struct sysc *ddata)
if (match && match->data)
sysc_soc->soc = (int)match->data;
+ /*
+ * Check and warn about possible old incomplete dtb. We now want to see
+ * simple-pm-bus instead of simple-bus in the dtb for genpd using SoCs.
+ */
+ switch (sysc_soc->soc) {
+ case SOC_AM3:
+ case SOC_AM4:
+ np = of_find_node_by_path("/ocp");
+ WARN_ONCE(np && of_device_is_compatible(np, "simple-bus"),
+ "ti-sysc: Incomplete old dtb, please update\n");
+ break;
+ default:
+ break;
+ }
+
/* Ignore devices that are not available on HS and EMU SoCs */
if (!sysc_soc->general_purpose) {
switch (sysc_soc->soc) {