On Sat, 4 Mar 2023 at 15:27, Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> wrote:
>
> From: Shawn Guo <shawn.guo@xxxxxxxxxx>
>
> The RPM clock enabling state can be found with 'enabled' in struct
> clk_smd_rpm. Add .is_enabled hook so that clk_summary in debugfs can
> show a correct enabling state for RPM clocks.
There is a small problem with this patch: now if the bootloader leaves
a clock enabled for some reason and there are no Linux users for that
clock, clk_disable_unused_subtree() will consider this clock disabled
and will not disable the clock on its own.
And at this stage of smd-rpm platforms support I think we better off
finding missing clock consumers rather than depending on the
bootloader for some of the setup.
>
> Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
> [Konrad: rebase]
> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> ---
> drivers/clk/qcom/clk-smd-rpm.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/clk/qcom/clk-smd-rpm.c b/drivers/clk/qcom/clk-smd-rpm.c
> index 198886c1b6c8..ecacfbc4a16c 100644
> --- a/drivers/clk/qcom/clk-smd-rpm.c
> +++ b/drivers/clk/qcom/clk-smd-rpm.c
> @@ -424,18 +424,27 @@ static int clk_smd_rpm_enable_scaling(struct qcom_smd_rpm *rpm)
> return 0;
> }
>
> +static int clk_smd_rpm_is_enabled(struct clk_hw *hw)
> +{
> + struct clk_smd_rpm *r = to_clk_smd_rpm(hw);
> +
> + return r->enabled;
> +}
> +
> static const struct clk_ops clk_smd_rpm_ops = {
> .prepare = clk_smd_rpm_prepare,
> .unprepare = clk_smd_rpm_unprepare,
> .set_rate = clk_smd_rpm_set_rate,
> .round_rate = clk_smd_rpm_round_rate,
> .recalc_rate = clk_smd_rpm_recalc_rate,
> + .is_enabled = clk_smd_rpm_is_enabled,
> };
>
> static const struct clk_ops clk_smd_rpm_branch_ops = {
> .prepare = clk_smd_rpm_prepare,
> .unprepare = clk_smd_rpm_unprepare,
> .recalc_rate = clk_smd_rpm_recalc_rate,
> + .is_enabled = clk_smd_rpm_is_enabled,
> };
>
> DEFINE_CLK_SMD_RPM_BRANCH_A(bi_tcxo, QCOM_SMD_RPM_MISC_CLK, 0, 19200000);
>
> --
> 2.39.2
>
--
With best wishes
Dmitry
