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clk: qcom: smd-rpm: Add support for clock handoff

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During boot-up if the clock driver put across a initial high vote then
there is no way to remove these votes which can cause the corresponding
votes to be left always high till the CPU suspends causing power
regression. Thus introduce a device property which can remove the
initial votes from the clock driver and leave it up to the client to
keep a vote.

Change-Id: I068c87d06df908ee0ed0e58f69d46933b301ea6f
Signed-off-by: Taniya Das <tdas@codeaurora.org>
This commit is contained in:
Taniya Das 2020-09-01 17:49:34 +05:30
commit a03c45d40e
1 changed files with 11 additions and 7 deletions
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18
drivers/clk/qcom/clk-smd-rpm.c
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@ -912,7 +912,7 @@ static int rpm_smd_clk_probe(struct platform_device *pdev)
{
struct clk_hw **hw_clks;
const struct rpm_smd_clk_desc *desc;
int ret, i, is_holi;
int ret, i, is_holi, hw_clk_handoff = false;
desc = of_device_get_match_data(&pdev->dev);
if (!desc)
@ -928,13 +928,17 @@ static int rpm_smd_clk_probe(struct platform_device *pdev)
hw_clks = desc->clks;
for (i = 0; i < desc->num_clks; i++) {
if (!hw_clks[i])
continue;
hw_clk_handoff = of_property_read_bool(pdev->dev.of_node,
"qcom,hw-clk-handoff");
if (hw_clk_handoff) {
for (i = 0; i < desc->num_clks; i++) {
if (!hw_clks[i])
continue;
ret = clk_smd_rpm_handoff(hw_clks[i]);
if (ret)
goto err;
ret = clk_smd_rpm_handoff(hw_clks[i]);
if (ret)
goto err;
}
}
ret = clk_smd_rpm_enable_scaling();