Commit 8cbdc1f0 authored by Marek Vasut's avatar Marek Vasut Committed by Stephen Boyd

clk: vc5: Add suspend/resume support

Add simple suspend/resume handlers to the driver to restore the chip
configuration after resume. It is possible that the chip was configured
with non-default values before suspend-resume cycle and that the chip
is powered down during this cycle, so the configuration could get lost.
Signed-off-by: default avatarMarek Vasut <>
Cc: Alexey Firago <>
Cc: Laurent Pinchart <>
Cc: Michael Turquette <>
Cc: Stephen Boyd <>
Reviewed-by: Laurent Pinchart's avatarLaurent Pinchart <>
Tested-by: Laurent Pinchart's avatarLaurent Pinchart <>
Signed-off-by: default avatarStephen Boyd <>
parent 65102238
......@@ -906,6 +906,28 @@ static int vc5_remove(struct i2c_client *client)
return 0;
static int __maybe_unused vc5_suspend(struct device *dev)
struct vc5_driver_data *vc5 = dev_get_drvdata(dev);
regcache_cache_only(vc5->regmap, true);
return 0;
static int __maybe_unused vc5_resume(struct device *dev)
struct vc5_driver_data *vc5 = dev_get_drvdata(dev);
int ret;
regcache_cache_only(vc5->regmap, false);
ret = regcache_sync(vc5->regmap);
if (ret)
dev_err(dev, "Failed to restore register map: %d\n", ret);
return ret;
static const struct vc5_chip_info idt_5p49v5923_info = {
.model = IDT_VC5_5P49V5923,
.clk_fod_cnt = 2,
......@@ -961,9 +983,12 @@ static const struct of_device_id clk_vc5_of_match[] = {
MODULE_DEVICE_TABLE(of, clk_vc5_of_match);
static SIMPLE_DEV_PM_OPS(vc5_pm_ops, vc5_suspend, vc5_resume);
static struct i2c_driver vc5_driver = {
.driver = {
.name = "vc5",
.pm = &vc5_pm_ops,
.of_match_table = clk_vc5_of_match,
.probe = vc5_probe,
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