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authorTony Lindgren <tony@atomide.com>2021-09-21 12:42:25 +0300
committerTony Lindgren <tony@atomide.com>2021-09-21 12:50:38 +0300
commit6a52bc2b81fa06b7ab98472c7d80644e8e071af6 (patch)
tree986eb5fc8d85362ca3ed1bf921f05cd83e603f91 /drivers/bus
parent9d881361206ebcf6285c2ec2ef275aff80875347 (diff)
bus: ti-sysc: Add quirk handling for reset on re-init
At least am335x gpmc module needs a reset in addition to re-init on resume. Let's add a quirk handling for reset on re-init. Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/ti-sysc.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index a73c707d14c3..cacdc4e301fb 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -157,6 +157,7 @@ struct sysc {
static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
bool is_child);
+static int sysc_reset(struct sysc *ddata);
static void sysc_write(struct sysc *ddata, int offset, u32 value)
{
@@ -1440,6 +1441,15 @@ static int sysc_reinit_module(struct sysc *ddata, bool leave_enabled)
if (error)
dev_warn(dev, "reinit resume failed: %i\n", error);
+ /* Some modules like am335x gpmc need reset and restore of sysconfig */
+ if (ddata->cfg.quirks & SYSC_QUIRK_RESET_ON_CTX_LOST) {
+ error = sysc_reset(ddata);
+ if (error)
+ dev_warn(dev, "reinit reset failed: %i\n", error);
+
+ sysc_write_sysconfig(ddata, ddata->sysconfig);
+ }
+
if (leave_enabled)
return error;