On Mon, Jul 22, 2024 at 11:24:33AM +0300, Dmitry Baryshkov wrote:
> On Mon, Jul 22, 2024 at 11:25:37AM GMT, Varadarajan Narayanan wrote:
> > gcc_qdss_tsctr_clk_src (enabled in the boot loaders and dependent
> > on gpll4_main) was not registered as one of the ipq5332 clocks.
> > Hence clk_disable_unused() disabled 'gpll4_main' assuming there
> > were no consumers for 'gpll4_main' resulting in system freeze or
> > reboots.
> >
> > After registering gcc_qdss_tsctr_clk_src, CLK_IGNORE_UNUSED can
> > be removed from gpll4_main.
>
> Commented below.
>
> >
> > Signed-off-by: Varadarajan Narayanan <quic_varada@xxxxxxxxxxx>
>
> Fixes?
Will add that. Was hesitant to add as it would point to the approx
3800 line commit (3d89d52970fd) that introduced the gcc-ipq5332.c file.
> > ---
> > drivers/clk/qcom/gcc-ipq5332.c | 12 +-----------
> > 1 file changed, 1 insertion(+), 11 deletions(-)
> >
> > diff --git a/drivers/clk/qcom/gcc-ipq5332.c b/drivers/clk/qcom/gcc-ipq5332.c
> > index f98591148a97..237b6a766179 100644
> > --- a/drivers/clk/qcom/gcc-ipq5332.c
> > +++ b/drivers/clk/qcom/gcc-ipq5332.c
> > @@ -126,17 +126,6 @@ static struct clk_alpha_pll gpll4_main = {
> > .parent_data = &gcc_parent_data_xo,
> > .num_parents = 1,
> > .ops = &clk_alpha_pll_stromer_ops,
> > - /*
> > - * There are no consumers for this GPLL in kernel yet,
> > - * (will be added soon), so the clock framework
> > - * disables this source. But some of the clocks
> > - * initialized by boot loaders uses this source. So we
> > - * need to keep this clock ON. Add the
> > - * CLK_IGNORE_UNUSED flag so the clock will not be
> > - * disabled. Once the consumer in kernel is added, we
> > - * can get rid of this flag.
> > - */
> > - .flags = CLK_IGNORE_UNUSED,
>
> You can't drop it in this patch, since GPLL4 still can get disabled if
> GCC_QDSS_TSCTR_CLK_SRC gets disabled. This chunk should go to the next
> patch (or you should reorder the patches).
Ok, will move the above chunk to next patch.
Thanks
Varada
> > },
> > },
> > };
> > @@ -3388,6 +3377,7 @@ static struct clk_regmap *gcc_ipq5332_clocks[] = {
> > [GCC_QDSS_DAP_DIV_CLK_SRC] = &gcc_qdss_dap_div_clk_src.clkr,
> > [GCC_QDSS_ETR_USB_CLK] = &gcc_qdss_etr_usb_clk.clkr,
> > [GCC_QDSS_EUD_AT_CLK] = &gcc_qdss_eud_at_clk.clkr,
> > + [GCC_QDSS_TSCTR_CLK_SRC] = &gcc_qdss_tsctr_clk_src.clkr,
> > [GCC_QPIC_AHB_CLK] = &gcc_qpic_ahb_clk.clkr,
> > [GCC_QPIC_CLK] = &gcc_qpic_clk.clkr,
> > [GCC_QPIC_IO_MACRO_CLK] = &gcc_qpic_io_macro_clk.clkr,
> > --
> > 2.34.1
> >
>
> --
> With best wishes
> Dmitry
