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bus: ti-sysc: Check for old incomplete dtb

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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>
This commit is contained in:
Tony Lindgren 2021-03-08 11:35:09 +02:00
parent f2dc0755fc
commit 5f7259a578
1 changed files with 16 additions and 0 deletions
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16
drivers/bus/ti-sysc.c
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@ -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) {