| Message ID | 20240417105605.836705-6-quic_varada@quicinc.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add interconnect driver for IPQ9574 SoC | expand |
On Wed, 17 Apr 2024 at 13:57, Varadarajan Narayanan <quic_varada@quicinc.com> wrote: > > Unlike MSM platforms that manage NoC related clocks and scaling > from RPM, IPQ SoCs dont involve RPM in managing NoC related > clocks and there is no NoC scaling. > > However, there is a requirement to enable some NoC interface > clocks for accessing the peripheral controllers present on > these NoCs. Though exposing these as normal clocks would work, > having a minimalistic interconnect driver to handle these clocks > would make it consistent with other Qualcomm platforms resulting > in common code paths. This is similar to msm8996-cbf's usage of > icc-clk framework. > > Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com> > --- > v8: Explicitly set master and slave ids > v7: Restore clk_get > v6: first_id -> icc_first_node_id > Remove clock get so that the peripheral that uses the clock > can do the clock get > v5: Split changes in common.c to separate patch > Fix error handling > Use devm_icc_clk_register instead of icc_clk_register > v4: Use clk_hw instead of indices > Do icc register in qcom_cc_probe() call stream > Add icc clock info to qcom_cc_desc structure > v3: Use indexed identifiers here to avoid confusion > Fix error messages and move to common.c > v2: Move DTS to separate patch > Update commit log > Auto select CONFIG_INTERCONNECT & CONFIG_INTERCONNECT_CLK to fix build error > --- > drivers/clk/qcom/common.c | 35 ++++++++++++++++++++++++++++++++++- > drivers/clk/qcom/common.h | 16 ++++++++++++++++ > 2 files changed, 50 insertions(+), 1 deletion(-) > > diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c > index 75f09e6e057e..a6410b1828ca 100644 > --- a/drivers/clk/qcom/common.c > +++ b/drivers/clk/qcom/common.c > @@ -8,6 +8,7 @@ > #include <linux/regmap.h> > #include <linux/platform_device.h> > #include <linux/clk-provider.h> > +#include <linux/interconnect-clk.h> > #include <linux/reset-controller.h> > #include <linux/of.h> > > @@ -234,6 +235,38 @@ static struct clk_hw *qcom_cc_clk_hw_get(struct of_phandle_args *clkspec, > return cc->rclks[idx] ? &cc->rclks[idx]->hw : NULL; > } > > +static int qcom_cc_icc_register(struct device *dev, > + const struct qcom_cc_desc *desc) > +{ > + struct icc_clk_data *icd; > + struct clk_hw *hws; > + int i; > + > + if (!IS_ENABLED(CONFIG_INTERCONNECT_CLK)) > + return 0; > + > + if (!desc->icc_hws) > + return 0; > + > + icd = devm_kcalloc(dev, desc->num_icc_hws, sizeof(*icd), GFP_KERNEL); > + if (!icd) > + return -ENOMEM; > + > + for (i = 0; i < desc->num_icc_hws; i++) { > + icd[i].master_id = desc->icc_hws[i].master_id; > + icd[i].slave_id = desc->icc_hws[i].slave_id; > + hws = &desc->clks[desc->icc_hws[i].clk_id]->hw; I think I keep on repeating this again and again. Instead of passing indices please pass clk_hw pointers. > + icd[i].clk = devm_clk_hw_get_clk(dev, hws, "icc"); > + if (!icd[i].clk) > + return dev_err_probe(dev, -ENOENT, > + "(%d) clock entry is null\n", i); > + icd[i].name = clk_hw_get_name(hws); > + } > + > + return devm_icc_clk_register(dev, desc->icc_first_node_id, > + desc->num_icc_hws, icd); > +} > + > int qcom_cc_really_probe(struct platform_device *pdev, > const struct qcom_cc_desc *desc, struct regmap *regmap) > { > @@ -303,7 +336,7 @@ int qcom_cc_really_probe(struct platform_device *pdev, > if (ret) > return ret; > > - return 0; > + return qcom_cc_icc_register(dev, desc); > } > EXPORT_SYMBOL_GPL(qcom_cc_really_probe); > > diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h > index 9c8f7b798d9f..f6b25df1ca17 100644 > --- a/drivers/clk/qcom/common.h > +++ b/drivers/clk/qcom/common.h > @@ -19,6 +19,19 @@ struct clk_hw; > #define PLL_VOTE_FSM_ENA BIT(20) > #define PLL_VOTE_FSM_RESET BIT(21) > > +struct qcom_icc_hws_data { > + int master_id; > + int slave_id; > + int clk_id; > +}; > + > +#define HWS_DATA(_b, _c) \ > +{ \ > + .master_id = MASTER_##_b, \ > + .slave_id = SLAVE_##_b, \ > + .clk_id = _c, \ > +} This shouldn't be a part of this commit. It is not used in it. > + > struct qcom_cc_desc { > const struct regmap_config *config; > struct clk_regmap **clks; > @@ -29,6 +42,9 @@ struct qcom_cc_desc { > size_t num_gdscs; > struct clk_hw **clk_hws; > size_t num_clk_hws; > + struct qcom_icc_hws_data *icc_hws; > + size_t num_icc_hws; > + unsigned int icc_first_node_id; > }; > > /** > -- > 2.34.1 >
On Wed, Apr 17, 2024 at 02:29:03PM +0300, Dmitry Baryshkov wrote: > On Wed, 17 Apr 2024 at 13:57, Varadarajan Narayanan > <quic_varada@quicinc.com> wrote: > > > > Unlike MSM platforms that manage NoC related clocks and scaling > > from RPM, IPQ SoCs dont involve RPM in managing NoC related > > clocks and there is no NoC scaling. > > > > However, there is a requirement to enable some NoC interface > > clocks for accessing the peripheral controllers present on > > these NoCs. Though exposing these as normal clocks would work, > > having a minimalistic interconnect driver to handle these clocks > > would make it consistent with other Qualcomm platforms resulting > > in common code paths. This is similar to msm8996-cbf's usage of > > icc-clk framework. > > > > Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com> > > --- > > v8: Explicitly set master and slave ids > > v7: Restore clk_get > > v6: first_id -> icc_first_node_id > > Remove clock get so that the peripheral that uses the clock > > can do the clock get > > v5: Split changes in common.c to separate patch > > Fix error handling > > Use devm_icc_clk_register instead of icc_clk_register > > v4: Use clk_hw instead of indices > > Do icc register in qcom_cc_probe() call stream > > Add icc clock info to qcom_cc_desc structure > > v3: Use indexed identifiers here to avoid confusion > > Fix error messages and move to common.c > > v2: Move DTS to separate patch > > Update commit log > > Auto select CONFIG_INTERCONNECT & CONFIG_INTERCONNECT_CLK to fix build error > > --- > > drivers/clk/qcom/common.c | 35 ++++++++++++++++++++++++++++++++++- > > drivers/clk/qcom/common.h | 16 ++++++++++++++++ > > 2 files changed, 50 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c > > index 75f09e6e057e..a6410b1828ca 100644 > > --- a/drivers/clk/qcom/common.c > > +++ b/drivers/clk/qcom/common.c > > @@ -8,6 +8,7 @@ > > #include <linux/regmap.h> > > #include <linux/platform_device.h> > > #include <linux/clk-provider.h> > > +#include <linux/interconnect-clk.h> > > #include <linux/reset-controller.h> > > #include <linux/of.h> > > > > @@ -234,6 +235,38 @@ static struct clk_hw *qcom_cc_clk_hw_get(struct of_phandle_args *clkspec, > > return cc->rclks[idx] ? &cc->rclks[idx]->hw : NULL; > > } > > > > +static int qcom_cc_icc_register(struct device *dev, > > + const struct qcom_cc_desc *desc) > > +{ > > + struct icc_clk_data *icd; > > + struct clk_hw *hws; > > + int i; > > + > > + if (!IS_ENABLED(CONFIG_INTERCONNECT_CLK)) > > + return 0; > > + > > + if (!desc->icc_hws) > > + return 0; > > + > > + icd = devm_kcalloc(dev, desc->num_icc_hws, sizeof(*icd), GFP_KERNEL); > > + if (!icd) > > + return -ENOMEM; > > + > > + for (i = 0; i < desc->num_icc_hws; i++) { > > + icd[i].master_id = desc->icc_hws[i].master_id; > > + icd[i].slave_id = desc->icc_hws[i].slave_id; > > + hws = &desc->clks[desc->icc_hws[i].clk_id]->hw; > > I think I keep on repeating this again and again. Instead of passing > indices please pass clk_hw pointers. I'm sorry. Based on the following feedback for v7 from you I changed it to use indices instead of clk_hw pointers. Am I missing something? https://lore.kernel.org/linux-arm-msm/CAA8EJpohAe-aW1QqVkE9NBRU0DpZR7UiwdUKk6rS_YFAhenZZA@mail.gmail.com/ <quote> > + struct clk_hw **icc_hws; Still we are passing hws here. We already have all the hws in a different array. Can we just pass the indices? </quote> Please confirm. > > + icd[i].clk = devm_clk_hw_get_clk(dev, hws, "icc"); > > + if (!icd[i].clk) > > + return dev_err_probe(dev, -ENOENT, > > + "(%d) clock entry is null\n", i); > > + icd[i].name = clk_hw_get_name(hws); > > + } > > + > > + return devm_icc_clk_register(dev, desc->icc_first_node_id, > > + desc->num_icc_hws, icd); > > +} > > + > > int qcom_cc_really_probe(struct platform_device *pdev, > > const struct qcom_cc_desc *desc, struct regmap *regmap) > > { > > @@ -303,7 +336,7 @@ int qcom_cc_really_probe(struct platform_device *pdev, > > if (ret) > > return ret; > > > > - return 0; > > + return qcom_cc_icc_register(dev, desc); > > } > > EXPORT_SYMBOL_GPL(qcom_cc_really_probe); > > > > diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h > > index 9c8f7b798d9f..f6b25df1ca17 100644 > > --- a/drivers/clk/qcom/common.h > > +++ b/drivers/clk/qcom/common.h > > @@ -19,6 +19,19 @@ struct clk_hw; > > #define PLL_VOTE_FSM_ENA BIT(20) > > #define PLL_VOTE_FSM_RESET BIT(21) > > > > +struct qcom_icc_hws_data { > > + int master_id; > > + int slave_id; > > + int clk_id; > > +}; > > + > > +#define HWS_DATA(_b, _c) \ > > +{ \ > > + .master_id = MASTER_##_b, \ > > + .slave_id = SLAVE_##_b, \ > > + .clk_id = _c, \ > > +} > > This shouldn't be a part of this commit. It is not used in it. Ok. Thanks Varada > > + > > struct qcom_cc_desc { > > const struct regmap_config *config; > > struct clk_regmap **clks; > > @@ -29,6 +42,9 @@ struct qcom_cc_desc { > > size_t num_gdscs; > > struct clk_hw **clk_hws; > > size_t num_clk_hws; > > + struct qcom_icc_hws_data *icc_hws; > > + size_t num_icc_hws; > > + unsigned int icc_first_node_id; > > }; > > > > /** > > -- > > 2.34.1 > > > > > -- > With best wishes > Dmitry
On Wed, 17 Apr 2024 at 19:34, Varadarajan Narayanan <quic_varada@quicinc.com> wrote: > > On Wed, Apr 17, 2024 at 02:29:03PM +0300, Dmitry Baryshkov wrote: > > On Wed, 17 Apr 2024 at 13:57, Varadarajan Narayanan > > <quic_varada@quicinc.com> wrote: > > > > > > Unlike MSM platforms that manage NoC related clocks and scaling > > > from RPM, IPQ SoCs dont involve RPM in managing NoC related > > > clocks and there is no NoC scaling. > > > > > > However, there is a requirement to enable some NoC interface > > > clocks for accessing the peripheral controllers present on > > > these NoCs. Though exposing these as normal clocks would work, > > > having a minimalistic interconnect driver to handle these clocks > > > would make it consistent with other Qualcomm platforms resulting > > > in common code paths. This is similar to msm8996-cbf's usage of > > > icc-clk framework. > > > > > > Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com> > > > --- > > > v8: Explicitly set master and slave ids > > > v7: Restore clk_get > > > v6: first_id -> icc_first_node_id > > > Remove clock get so that the peripheral that uses the clock > > > can do the clock get > > > v5: Split changes in common.c to separate patch > > > Fix error handling > > > Use devm_icc_clk_register instead of icc_clk_register > > > v4: Use clk_hw instead of indices > > > Do icc register in qcom_cc_probe() call stream > > > Add icc clock info to qcom_cc_desc structure > > > v3: Use indexed identifiers here to avoid confusion > > > Fix error messages and move to common.c > > > v2: Move DTS to separate patch > > > Update commit log > > > Auto select CONFIG_INTERCONNECT & CONFIG_INTERCONNECT_CLK to fix build error > > > --- > > > drivers/clk/qcom/common.c | 35 ++++++++++++++++++++++++++++++++++- > > > drivers/clk/qcom/common.h | 16 ++++++++++++++++ > > > 2 files changed, 50 insertions(+), 1 deletion(-) > > > > > > diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c > > > index 75f09e6e057e..a6410b1828ca 100644 > > > --- a/drivers/clk/qcom/common.c > > > +++ b/drivers/clk/qcom/common.c > > > @@ -8,6 +8,7 @@ > > > #include <linux/regmap.h> > > > #include <linux/platform_device.h> > > > #include <linux/clk-provider.h> > > > +#include <linux/interconnect-clk.h> > > > #include <linux/reset-controller.h> > > > #include <linux/of.h> > > > > > > @@ -234,6 +235,38 @@ static struct clk_hw *qcom_cc_clk_hw_get(struct of_phandle_args *clkspec, > > > return cc->rclks[idx] ? &cc->rclks[idx]->hw : NULL; > > > } > > > > > > +static int qcom_cc_icc_register(struct device *dev, > > > + const struct qcom_cc_desc *desc) > > > +{ > > > + struct icc_clk_data *icd; > > > + struct clk_hw *hws; > > > + int i; > > > + > > > + if (!IS_ENABLED(CONFIG_INTERCONNECT_CLK)) > > > + return 0; > > > + > > > + if (!desc->icc_hws) > > > + return 0; > > > + > > > + icd = devm_kcalloc(dev, desc->num_icc_hws, sizeof(*icd), GFP_KERNEL); > > > + if (!icd) > > > + return -ENOMEM; > > > + > > > + for (i = 0; i < desc->num_icc_hws; i++) { > > > + icd[i].master_id = desc->icc_hws[i].master_id; > > > + icd[i].slave_id = desc->icc_hws[i].slave_id; > > > + hws = &desc->clks[desc->icc_hws[i].clk_id]->hw; > > > > I think I keep on repeating this again and again. Instead of passing > > indices please pass clk_hw pointers. > > I'm sorry. Based on the following feedback for v7 from you I changed it to > use indices instead of clk_hw pointers. Am I missing something? > > https://lore.kernel.org/linux-arm-msm/CAA8EJpohAe-aW1QqVkE9NBRU0DpZR7UiwdUKk6rS_YFAhenZZA@mail.gmail.com/ > <quote> > > + struct clk_hw **icc_hws; > > Still we are passing hws here. We already have all the hws in a > different array. Can we just pass the indices? > </quote> > > Please confirm. Ok, it's fine then. > > > > + icd[i].clk = devm_clk_hw_get_clk(dev, hws, "icc"); > > > + if (!icd[i].clk) > > > + return dev_err_probe(dev, -ENOENT, > > > + "(%d) clock entry is null\n", i); > > > + icd[i].name = clk_hw_get_name(hws); > > > + } > > > + > > > + return devm_icc_clk_register(dev, desc->icc_first_node_id, > > > + desc->num_icc_hws, icd); > > > +} > > > + > > > int qcom_cc_really_probe(struct platform_device *pdev, > > > const struct qcom_cc_desc *desc, struct regmap *regmap) > > > { > > > @@ -303,7 +336,7 @@ int qcom_cc_really_probe(struct platform_device *pdev, > > > if (ret) > > > return ret; > > > > > > - return 0; > > > + return qcom_cc_icc_register(dev, desc); > > > } > > > EXPORT_SYMBOL_GPL(qcom_cc_really_probe); > > > > > > diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h > > > index 9c8f7b798d9f..f6b25df1ca17 100644 > > > --- a/drivers/clk/qcom/common.h > > > +++ b/drivers/clk/qcom/common.h > > > @@ -19,6 +19,19 @@ struct clk_hw; > > > #define PLL_VOTE_FSM_ENA BIT(20) > > > #define PLL_VOTE_FSM_RESET BIT(21) > > > > > > +struct qcom_icc_hws_data { > > > + int master_id; > > > + int slave_id; > > > + int clk_id; > > > +}; > > > + > > > +#define HWS_DATA(_b, _c) \ > > > +{ \ > > > + .master_id = MASTER_##_b, \ > > > + .slave_id = SLAVE_##_b, \ > > > + .clk_id = _c, \ > > > +} > > > > This shouldn't be a part of this commit. It is not used in it. > > Ok. > > Thanks > Varada > > > > + > > > struct qcom_cc_desc { > > > const struct regmap_config *config; > > > struct clk_regmap **clks; > > > @@ -29,6 +42,9 @@ struct qcom_cc_desc { > > > size_t num_gdscs; > > > struct clk_hw **clk_hws; > > > size_t num_clk_hws; > > > + struct qcom_icc_hws_data *icc_hws; > > > + size_t num_icc_hws; > > > + unsigned int icc_first_node_id; > > > }; > > > > > > /** > > > -- > > > 2.34.1 > > > > > > > > > -- > > With best wishes > > Dmitry
diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c index 75f09e6e057e..a6410b1828ca 100644 --- a/drivers/clk/qcom/common.c +++ b/drivers/clk/qcom/common.c @@ -8,6 +8,7 @@ #include <linux/regmap.h> #include <linux/platform_device.h> #include <linux/clk-provider.h> +#include <linux/interconnect-clk.h> #include <linux/reset-controller.h> #include <linux/of.h> @@ -234,6 +235,38 @@ static struct clk_hw *qcom_cc_clk_hw_get(struct of_phandle_args *clkspec, return cc->rclks[idx] ? &cc->rclks[idx]->hw : NULL; } +static int qcom_cc_icc_register(struct device *dev, + const struct qcom_cc_desc *desc) +{ + struct icc_clk_data *icd; + struct clk_hw *hws; + int i; + + if (!IS_ENABLED(CONFIG_INTERCONNECT_CLK)) + return 0; + + if (!desc->icc_hws) + return 0; + + icd = devm_kcalloc(dev, desc->num_icc_hws, sizeof(*icd), GFP_KERNEL); + if (!icd) + return -ENOMEM; + + for (i = 0; i < desc->num_icc_hws; i++) { + icd[i].master_id = desc->icc_hws[i].master_id; + icd[i].slave_id = desc->icc_hws[i].slave_id; + hws = &desc->clks[desc->icc_hws[i].clk_id]->hw; + icd[i].clk = devm_clk_hw_get_clk(dev, hws, "icc"); + if (!icd[i].clk) + return dev_err_probe(dev, -ENOENT, + "(%d) clock entry is null\n", i); + icd[i].name = clk_hw_get_name(hws); + } + + return devm_icc_clk_register(dev, desc->icc_first_node_id, + desc->num_icc_hws, icd); +} + int qcom_cc_really_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc, struct regmap *regmap) { @@ -303,7 +336,7 @@ int qcom_cc_really_probe(struct platform_device *pdev, if (ret) return ret; - return 0; + return qcom_cc_icc_register(dev, desc); } EXPORT_SYMBOL_GPL(qcom_cc_really_probe); diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h index 9c8f7b798d9f..f6b25df1ca17 100644 --- a/drivers/clk/qcom/common.h +++ b/drivers/clk/qcom/common.h @@ -19,6 +19,19 @@ struct clk_hw; #define PLL_VOTE_FSM_ENA BIT(20) #define PLL_VOTE_FSM_RESET BIT(21) +struct qcom_icc_hws_data { + int master_id; + int slave_id; + int clk_id; +}; + +#define HWS_DATA(_b, _c) \ +{ \ + .master_id = MASTER_##_b, \ + .slave_id = SLAVE_##_b, \ + .clk_id = _c, \ +} + struct qcom_cc_desc { const struct regmap_config *config; struct clk_regmap **clks; @@ -29,6 +42,9 @@ struct qcom_cc_desc { size_t num_gdscs; struct clk_hw **clk_hws; size_t num_clk_hws; + struct qcom_icc_hws_data *icc_hws; + size_t num_icc_hws; + unsigned int icc_first_node_id; }; /**
Unlike MSM platforms that manage NoC related clocks and scaling from RPM, IPQ SoCs dont involve RPM in managing NoC related clocks and there is no NoC scaling. However, there is a requirement to enable some NoC interface clocks for accessing the peripheral controllers present on these NoCs. Though exposing these as normal clocks would work, having a minimalistic interconnect driver to handle these clocks would make it consistent with other Qualcomm platforms resulting in common code paths. This is similar to msm8996-cbf's usage of icc-clk framework. Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com> --- v8: Explicitly set master and slave ids v7: Restore clk_get v6: first_id -> icc_first_node_id Remove clock get so that the peripheral that uses the clock can do the clock get v5: Split changes in common.c to separate patch Fix error handling Use devm_icc_clk_register instead of icc_clk_register v4: Use clk_hw instead of indices Do icc register in qcom_cc_probe() call stream Add icc clock info to qcom_cc_desc structure v3: Use indexed identifiers here to avoid confusion Fix error messages and move to common.c v2: Move DTS to separate patch Update commit log Auto select CONFIG_INTERCONNECT & CONFIG_INTERCONNECT_CLK to fix build error --- drivers/clk/qcom/common.c | 35 ++++++++++++++++++++++++++++++++++- drivers/clk/qcom/common.h | 16 ++++++++++++++++ 2 files changed, 50 insertions(+), 1 deletion(-)