linux-kernel - Re: [PATCH v8 6/7] clk: qcom: ipq9574: Use icc-clk for enabling NoC related clocks

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Message-ID: <Zh/7PzrIM6hlbSsz@hu-varada-blr.qualcomm.com>
Date: Wed, 17 Apr 2024 22:09:27 +0530
From: Varadarajan Narayanan <quic_varada@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC: <andersson@...nel.org>, <mturquette@...libre.com>, <sboyd@...nel.org>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <konrad.dybcio@...aro.org>, <djakov@...nel.org>,
        <quic_anusha@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v8 6/7] clk: qcom: ipq9574: Use icc-clk for enabling NoC
 related clocks

On Wed, Apr 17, 2024 at 02:30:02PM +0300, Dmitry Baryshkov wrote:
> On Wed, 17 Apr 2024 at 13:57, Varadarajan Narayanan
> <quic_varada@...cinc.com> wrote:
> >
> > Use the icc-clk framework to enable few clocks to be able to
> > create paths and use the peripherals connected on those NoCs.
> >
> > Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
> > ---
> > v8: Bind clock and interconnect using master and slave ids
> >     Use indices instead of clock pointers
> > v7: Auto select INTERCONNECT & INTERCONNECT_CLK in COMMON_CLK_QCOM
> >     to address build break with random config build test, with the
> >     following combination
> >
> >         CONFIG_COMMON_CLK_QCOM=y
> >                 and
> >         CONFIG_INTERCONNECT_CLK=m
> >
> >     the following error is seen as devm_icc_clk_register is in a
> >     module and being referenced from vmlinux.
> >
> >         powerpc64-linux-ld: drivers/clk/qcom/common.o: in function `qcom_cc_really_probe':
> >         >> common.c:(.text+0x980): undefined reference to `devm_icc_clk_register'
> >
> > v6: Move enum to dt-bindings and share between here and DT
> >     first_id -> icc_first_node_id
> > v5: Split from common.c changes into separate patch
> >     No functional changes
> > ---
> >  drivers/clk/qcom/Kconfig       |  2 ++
> >  drivers/clk/qcom/gcc-ipq9574.c | 31 +++++++++++++++++++++++++++++++
> >  2 files changed, 33 insertions(+)
> >
> > diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
> > index 8ab08e7b5b6c..b65a373f2e6b 100644
> > --- a/drivers/clk/qcom/Kconfig
> > +++ b/drivers/clk/qcom/Kconfig
> > @@ -17,6 +17,8 @@ menuconfig COMMON_CLK_QCOM
> >         select RATIONAL
> >         select REGMAP_MMIO
> >         select RESET_CONTROLLER
> > +       select INTERCONNECT
> > +       select INTERCONNECT_CLK
> >
> >  if COMMON_CLK_QCOM
> >
> > diff --git a/drivers/clk/qcom/gcc-ipq9574.c b/drivers/clk/qcom/gcc-ipq9574.c
> > index 0a3f846695b8..7983e9ba0f35 100644
> > --- a/drivers/clk/qcom/gcc-ipq9574.c
> > +++ b/drivers/clk/qcom/gcc-ipq9574.c
> > @@ -4,6 +4,7 @@
> >   */
> >
> >  #include <linux/clk-provider.h>
> > +#include <linux/interconnect-clk.h>
> >  #include <linux/kernel.h>
> >  #include <linux/module.h>
> >  #include <linux/of.h>
> > @@ -12,6 +13,7 @@
> >
> >  #include <dt-bindings/clock/qcom,ipq9574-gcc.h>
> >  #include <dt-bindings/reset/qcom,ipq9574-gcc.h>
> > +#include <dt-bindings/interconnect/qcom,ipq9574.h>
> >
> >  #include "clk-alpha-pll.h"
> >  #include "clk-branch.h"
> > @@ -4301,6 +4303,32 @@ static const struct qcom_reset_map gcc_ipq9574_resets[] = {
> >         [GCC_WCSS_Q6_TBU_BCR] = { 0x12054, 0 },
> >  };
> >
> > +#define IPQ_APPS_ID                    9574    /* some unique value */
> > +
> > +static struct qcom_icc_hws_data icc_ipq9574_hws[] = {
> > +       HWS_DATA(ANOC_PCIE0, GCC_ANOC_PCIE0_1LANE_M_CLK),
>
> Have you seen other parts of the qcom framework using macros to wrap
> around structure initialisation? I don't think so. Please follow the
> suit and inline the macro here.

Ok, will change and post a new version.

Thanks
Varada

> > +       HWS_DATA(SNOC_PCIE0, GCC_SNOC_PCIE0_1LANE_S_CLK),
> > +       HWS_DATA(ANOC_PCIE1, GCC_ANOC_PCIE1_1LANE_M_CLK),
> > +       HWS_DATA(SNOC_PCIE1, GCC_SNOC_PCIE1_1LANE_S_CLK),
> > +       HWS_DATA(ANOC_PCIE2, GCC_ANOC_PCIE2_2LANE_M_CLK),
> > +       HWS_DATA(SNOC_PCIE2, GCC_SNOC_PCIE2_2LANE_S_CLK),
> > +       HWS_DATA(ANOC_PCIE3, GCC_ANOC_PCIE3_2LANE_M_CLK),
> > +       HWS_DATA(SNOC_PCIE3, GCC_SNOC_PCIE3_2LANE_S_CLK),
> > +       HWS_DATA(USB, GCC_SNOC_USB_CLK),
> > +       HWS_DATA(USB_AXI, GCC_ANOC_USB_AXI_CLK),
> > +       HWS_DATA(NSSNOC_NSSCC, GCC_NSSNOC_NSSCC_CLK),
> > +       HWS_DATA(NSSNOC_SNOC_0, GCC_NSSNOC_SNOC_CLK),
> > +       HWS_DATA(NSSNOC_SNOC_1, GCC_NSSNOC_SNOC_1_CLK),
> > +       HWS_DATA(NSSNOC_PCNOC_1, GCC_NSSNOC_PCNOC_1_CLK),
> > +       HWS_DATA(NSSNOC_QOSGEN_REF, GCC_NSSNOC_QOSGEN_REF_CLK),
> > +       HWS_DATA(NSSNOC_TIMEOUT_REF, GCC_NSSNOC_TIMEOUT_REF_CLK),
> > +       HWS_DATA(NSSNOC_XO_DCD, GCC_NSSNOC_XO_DCD_CLK),
> > +       HWS_DATA(NSSNOC_ATB, GCC_NSSNOC_ATB_CLK),
> > +       HWS_DATA(MEM_NOC_NSSNOC, GCC_MEM_NOC_NSSNOC_CLK),
> > +       HWS_DATA(NSSNOC_MEMNOC, GCC_NSSNOC_MEMNOC_CLK),
> > +       HWS_DATA(NSSNOC_MEM_NOC_1, GCC_NSSNOC_MEM_NOC_1_CLK),
> > +};
> > +
> >  static const struct of_device_id gcc_ipq9574_match_table[] = {
> >         { .compatible = "qcom,ipq9574-gcc" },
> >         { }
> > @@ -4323,6 +4351,9 @@ static const struct qcom_cc_desc gcc_ipq9574_desc = {
> >         .num_resets = ARRAY_SIZE(gcc_ipq9574_resets),
> >         .clk_hws = gcc_ipq9574_hws,
> >         .num_clk_hws = ARRAY_SIZE(gcc_ipq9574_hws),
> > +       .icc_hws = icc_ipq9574_hws,
> > +       .num_icc_hws = ARRAY_SIZE(icc_ipq9574_hws),
> > +       .icc_first_node_id = IPQ_APPS_ID,
> >  };
> >
> >  static int gcc_ipq9574_probe(struct platform_device *pdev)
> > --
> > 2.34.1
> >
>
>
> --
> With best wishes
> Dmitry