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clk: qcom: cbf-msm8996: scale CBF clock according to the CPUfreq

Browse source 
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>
Acked-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230512001334.2983048-4-dmitry.baryshkov@linaro.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2023-05-12 03:13:33 +03:00 committed by Georgi Djakov
parent 0ac2a08f42
commit 12dc71953e
2 changed files with 60 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/clk/qcom/Kconfig
View file

@ -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.

60
drivers/clk/qcom/clk-cbf-8996.c
View file

@ -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,
},
};