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path: root/drivers/bus/ti-sysc.c
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Diffstat (limited to 'drivers/bus/ti-sysc.c')
-rw-r--r--drivers/bus/ti-sysc.c50
1 files changed, 28 insertions, 22 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 2e7a6c490c88..209baa84db39 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1042,39 +1042,45 @@ static int sysc_reset(struct sysc *ddata)
100, MAX_MODULE_SOFTRESET_WAIT);
}
-/* At this point the module is configured enough to read the revision */
+/*
+ * At this point the module is configured enough to read the revision but
+ * module may not be completely configured yet to use PM runtime. Enable
+ * all clocks directly during init to configure the quirks needed for PM
+ * runtime based on the revision register.
+ */
static int sysc_init_module(struct sysc *ddata)
{
- int error;
+ int error = 0;
+ bool manage_clocks = true;
if (ddata->cfg.quirks &
- (SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT)) {
- ddata->revision = sysc_read_revision(ddata);
- goto rev_quirks;
- }
+ (SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT))
+ manage_clocks = false;
- error = pm_runtime_get_sync(ddata->dev);
- if (error < 0) {
- pm_runtime_put_noidle(ddata->dev);
+ if (manage_clocks) {
+ error = sysc_enable_opt_clocks(ddata);
+ if (error)
+ return error;
- return 0;
+ error = sysc_enable_main_clocks(ddata);
+ if (error)
+ goto err_opt_clocks;
}
+ ddata->revision = sysc_read_revision(ddata);
+ sysc_init_revision_quirks(ddata);
+
error = sysc_reset(ddata);
- if (error) {
+ if (error)
dev_err(ddata->dev, "Reset failed with %d\n", error);
- pm_runtime_put_sync(ddata->dev);
- return error;
- }
-
- ddata->revision = sysc_read_revision(ddata);
- pm_runtime_put_sync(ddata->dev);
-
-rev_quirks:
- sysc_init_revision_quirks(ddata);
+ if (manage_clocks)
+ sysc_disable_main_clocks(ddata);
+err_opt_clocks:
+ if (manage_clocks)
+ sysc_disable_opt_clocks(ddata);
- return 0;
+ return error;
}
static int sysc_init_sysc_mask(struct sysc *ddata)
@@ -1812,11 +1818,11 @@ static int sysc_probe(struct platform_device *pdev)
if (error)
return error;
- pm_runtime_enable(ddata->dev);
error = sysc_init_module(ddata);
if (error)
goto unprepare;
+ pm_runtime_enable(ddata->dev);
error = pm_runtime_get_sync(ddata->dev);
if (error < 0) {
pm_runtime_put_noidle(ddata->dev);
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