[v6,3/4] clk: qcom: cbf-msm8996: scale CBF clock according to the CPUfreq

Turn CBF into the interconnect provider. Scale CBF frequency (bandwidth)
according to CPU frequencies.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Yassine Oudjana <y.oudjana@protonmail.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/clk/qcom/Kconfig        |  1 +
 drivers/clk/qcom/clk-cbf-8996.c | 60 ++++++++++++++++++++++++++++++++-
 2 files changed, 60 insertions(+), 1 deletion(-)

On Fri, May 12, 2023 at 03:13:33AM +0300, Dmitry Baryshkov wrote:
> Turn CBF into the interconnect provider. Scale CBF frequency (bandwidth)
> according to CPU frequencies.
> 
> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
> Tested-by: Yassine Oudjana <y.oudjana@protonmail.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Georgi,

Dmitry tells me that you picked up the interconnect patches, I don't see
an immutable branch in your tree with them, but this patch has a build
time dependency on them. Could you please pick this through your tree as
well?

Acked-by: Bjorn Andersson <andersson@kernel.org>

Regards,
Bjorn

> ---
>  drivers/clk/qcom/Kconfig        |  1 +
>  drivers/clk/qcom/clk-cbf-8996.c | 60 ++++++++++++++++++++++++++++++++-
>  2 files changed, 60 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
> index 12be3e2371b3..85869e7a9f16 100644
> --- a/drivers/clk/qcom/Kconfig
> +++ b/drivers/clk/qcom/Kconfig
> @@ -48,6 +48,7 @@ config QCOM_CLK_APCS_MSM8916
>  config QCOM_CLK_APCC_MSM8996
>  	tristate "MSM8996 CPU Clock Controller"
>  	select QCOM_KRYO_L2_ACCESSORS
> +	select INTERCONNECT_CLK if INTERCONNECT
>  	depends on ARM64
>  	help
>  	  Support for the CPU clock controller on msm8996 devices.
> diff --git a/drivers/clk/qcom/clk-cbf-8996.c b/drivers/clk/qcom/clk-cbf-8996.c
> index cfd567636f4e..1e23b734abb3 100644
> --- a/drivers/clk/qcom/clk-cbf-8996.c
> +++ b/drivers/clk/qcom/clk-cbf-8996.c
> @@ -5,11 +5,15 @@
>  #include <linux/bitfield.h>
>  #include <linux/clk.h>
>  #include <linux/clk-provider.h>
> +#include <linux/interconnect-clk.h>
> +#include <linux/interconnect-provider.h>
>  #include <linux/of.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <linux/regmap.h>
>  
> +#include <dt-bindings/interconnect/qcom,msm8996-cbf.h>
> +
>  #include "clk-alpha-pll.h"
>  #include "clk-regmap.h"
>  
> @@ -223,6 +227,49 @@ static const struct regmap_config cbf_msm8996_regmap_config = {
>  	.val_format_endian	= REGMAP_ENDIAN_LITTLE,
>  };
>  
> +#ifdef CONFIG_INTERCONNECT
> +
> +/* Random ID that doesn't clash with main qnoc and OSM */
> +#define CBF_MASTER_NODE 2000
> +
> +static int qcom_msm8996_cbf_icc_register(struct platform_device *pdev, struct clk_hw *cbf_hw)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct clk *clk = devm_clk_hw_get_clk(dev, cbf_hw, "cbf");
> +	const struct icc_clk_data data[] = {
> +		{ .clk = clk, .name = "cbf", },
> +	};
> +	struct icc_provider *provider;
> +
> +	provider = icc_clk_register(dev, CBF_MASTER_NODE, ARRAY_SIZE(data), data);
> +	if (IS_ERR(provider))
> +		return PTR_ERR(provider);
> +
> +	platform_set_drvdata(pdev, provider);
> +
> +	return 0;
> +}
> +
> +static int qcom_msm8996_cbf_icc_remove(struct platform_device *pdev)
> +{
> +	struct icc_provider *provider = platform_get_drvdata(pdev);
> +
> +	icc_clk_unregister(provider);
> +
> +	return 0;
> +}
> +#define qcom_msm8996_cbf_icc_sync_state icc_sync_state
> +#else
> +static int qcom_msm8996_cbf_icc_register(struct platform_device *pdev,  struct clk_hw *cbf_hw)
> +{
> +	dev_warn(&pdev->dev, "CONFIG_INTERCONNECT is disabled, CBF clock is fixed\n");
> +
> +	return 0;
> +}
> +#define qcom_msm8996_cbf_icc_remove(pdev) (0)
> +#define qcom_msm8996_cbf_icc_sync_state NULL
> +#endif
> +
>  static int qcom_msm8996_cbf_probe(struct platform_device *pdev)
>  {
>  	void __iomem *base;
> @@ -281,7 +328,16 @@ static int qcom_msm8996_cbf_probe(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> -	return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &cbf_mux.clkr.hw);
> +	ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &cbf_mux.clkr.hw);
> +	if (ret)
> +		return ret;
> +
> +	return qcom_msm8996_cbf_icc_register(pdev, &cbf_mux.clkr.hw);
> +}
> +
> +static int qcom_msm8996_cbf_remove(struct platform_device *pdev)
> +{
> +	return qcom_msm8996_cbf_icc_remove(pdev);
>  }
>  
>  static const struct of_device_id qcom_msm8996_cbf_match_table[] = {
> @@ -292,9 +348,11 @@ MODULE_DEVICE_TABLE(of, qcom_msm8996_cbf_match_table);
>  
>  static struct platform_driver qcom_msm8996_cbf_driver = {
>  	.probe = qcom_msm8996_cbf_probe,
> +	.remove = qcom_msm8996_cbf_remove,
>  	.driver = {
>  		.name = "qcom-msm8996-cbf",
>  		.of_match_table = qcom_msm8996_cbf_match_table,
> +		.sync_state = qcom_msm8996_cbf_icc_sync_state,
>  	},
>  };
>  
> -- 
> 2.39.2
>

On 10.06.23 3:18, Bjorn Andersson wrote:
> On Fri, May 12, 2023 at 03:13:33AM +0300, Dmitry Baryshkov wrote:
>> Turn CBF into the interconnect provider. Scale CBF frequency (bandwidth)
>> according to CPU frequencies.
>>
>> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
>> Tested-by: Yassine Oudjana <y.oudjana@protonmail.com>
>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> 
> Georgi,
> 
> Dmitry tells me that you picked up the interconnect patches, I don't see
> an immutable branch in your tree with them, but this patch has a build
> time dependency on them. Could you please pick this through your tree as
> well?

It's done. Thanks a lot Bjorn!

BR,
Georgi

> Acked-by: Bjorn Andersson <andersson@kernel.org>
> 
> Regards,
> Bjorn
> 
>> ---
>>   drivers/clk/qcom/Kconfig        |  1 +
>>   drivers/clk/qcom/clk-cbf-8996.c | 60 ++++++++++++++++++++++++++++++++-
>>   2 files changed, 60 insertions(+), 1 deletion(-)
>>