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authorSricharan R <sricharan@codeaurora.org>2019-07-25 13:41:31 +0300
committerViresh Kumar <viresh.kumar@linaro.org>2019-09-03 05:25:00 +0300
commit7d12709544b8b3fb9727a34a664b8380e1e3493a (patch)
tree49958927ca1f9f7502d0166fffb8265bbe78697b
parent475a21e0eade5227488d97aebeaa882b16f38ca1 (diff)
downloadlinux-7d12709544b8b3fb9727a34a664b8380e1e3493a.tar.xz
cpufreq: qcom: Re-organise kryo cpufreq to use it for other nvmem based qcom socs
The kryo cpufreq driver reads the nvmem cell and uses that data to populate the opps. There are other qcom cpufreq socs like krait which does similar thing. Except for the interpretation of the read data, rest of the driver is same for both the cases. So pull the common things out for reuse. Signed-off-by: Sricharan R <sricharan@codeaurora.org> [niklas.cassel@linaro.org: split dt-binding into a separate patch and do not rename the compatible string. Update MAINTAINERS file.] Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> Reviewed-by: Ilia Lin <ilia.lin@kernel.org> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
-rw-r--r--MAINTAINERS4
-rw-r--r--drivers/cpufreq/Kconfig.arm4
-rw-r--r--drivers/cpufreq/Makefile2
-rw-r--r--drivers/cpufreq/qcom-cpufreq-nvmem.c (renamed from drivers/cpufreq/qcom-cpufreq-kryo.c)122
4 files changed, 78 insertions, 54 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 783569e3c4b4..cc73f908d5f9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13285,8 +13285,8 @@ QUALCOMM CPUFREQ DRIVER MSM8996/APQ8096
M: Ilia Lin <ilia.lin@kernel.org>
L: linux-pm@vger.kernel.org
S: Maintained
-F: Documentation/devicetree/bindings/opp/kryo-cpufreq.txt
-F: drivers/cpufreq/qcom-cpufreq-kryo.c
+F: Documentation/devicetree/bindings/opp/qcom-nvmem-cpufreq.txt
+F: drivers/cpufreq/qcom-cpufreq-nvmem.c
QUALCOMM EMAC GIGABIT ETHERNET DRIVER
M: Timur Tabi <timur@kernel.org>
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 56c31a78c692..b1aa485a28dd 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -120,8 +120,8 @@ config ARM_OMAP2PLUS_CPUFREQ
depends on ARCH_OMAP2PLUS
default ARCH_OMAP2PLUS
-config ARM_QCOM_CPUFREQ_KRYO
- tristate "Qualcomm Kryo based CPUFreq"
+config ARM_QCOM_CPUFREQ_NVMEM
+ tristate "Qualcomm nvmem based CPUFreq"
depends on ARM64
depends on QCOM_QFPROM
depends on QCOM_SMEM
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index 5a6c70d26c98..8572a918aa75 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -64,7 +64,7 @@ obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o
obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o
obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o
obj-$(CONFIG_ARM_QCOM_CPUFREQ_HW) += qcom-cpufreq-hw.o
-obj-$(CONFIG_ARM_QCOM_CPUFREQ_KRYO) += qcom-cpufreq-kryo.o
+obj-$(CONFIG_ARM_QCOM_CPUFREQ_NVMEM) += qcom-cpufreq-nvmem.o
obj-$(CONFIG_ARM_RASPBERRYPI_CPUFREQ) += raspberrypi-cpufreq.o
obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o
obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o
diff --git a/drivers/cpufreq/qcom-cpufreq-kryo.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
index dd64dcf89c74..fd08120768af 100644
--- a/drivers/cpufreq/qcom-cpufreq-kryo.c
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -9,7 +9,7 @@
* based on the silicon variant in use. Qualcomm Process Voltage Scaling Tables
* defines the voltage and frequency value based on the msm-id in SMEM
* and speedbin blown in the efuse combination.
- * The qcom-cpufreq-kryo driver reads the msm-id and efuse value from the SoC
+ * The qcom-cpufreq-nvmem driver reads the msm-id and efuse value from the SoC
* to provide the OPP framework with required information.
* This is used to determine the voltage and frequency value for each OPP of
* operating-points-v2 table when it is parsed by the OPP framework.
@@ -22,6 +22,7 @@
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
@@ -42,9 +43,9 @@ enum _msm8996_version {
NUM_OF_MSM8996_VERSIONS,
};
-static struct platform_device *cpufreq_dt_pdev, *kryo_cpufreq_pdev;
+static struct platform_device *cpufreq_dt_pdev, *cpufreq_pdev;
-static enum _msm8996_version qcom_cpufreq_kryo_get_msm_id(void)
+static enum _msm8996_version qcom_cpufreq_get_msm_id(void)
{
size_t len;
u32 *msm_id;
@@ -73,28 +74,62 @@ static enum _msm8996_version qcom_cpufreq_kryo_get_msm_id(void)
return version;
}
-static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
+static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ u32 *versions)
{
- struct opp_table **opp_tables;
+ size_t len;
+ u8 *speedbin;
enum _msm8996_version msm8996_version;
+
+ msm8996_version = qcom_cpufreq_get_msm_id();
+ if (NUM_OF_MSM8996_VERSIONS == msm8996_version) {
+ dev_err(cpu_dev, "Not Snapdragon 820/821!");
+ return -ENODEV;
+ }
+
+ speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+ if (IS_ERR(speedbin))
+ return PTR_ERR(speedbin);
+
+ switch (msm8996_version) {
+ case MSM8996_V3:
+ *versions = 1 << (unsigned int)(*speedbin);
+ break;
+ case MSM8996_SG:
+ *versions = 1 << ((unsigned int)(*speedbin) + 4);
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ kfree(speedbin);
+ return 0;
+}
+
+static int qcom_cpufreq_probe(struct platform_device *pdev)
+{
+ struct opp_table **opp_tables;
+ int (*get_version)(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ u32 *versions);
struct nvmem_cell *speedbin_nvmem;
struct device_node *np;
struct device *cpu_dev;
unsigned cpu;
- u8 *speedbin;
u32 versions;
- size_t len;
+ const struct of_device_id *match;
int ret;
cpu_dev = get_cpu_device(0);
if (!cpu_dev)
return -ENODEV;
- msm8996_version = qcom_cpufreq_kryo_get_msm_id();
- if (NUM_OF_MSM8996_VERSIONS == msm8996_version) {
- dev_err(cpu_dev, "Not Snapdragon 820/821!");
+ match = pdev->dev.platform_data;
+ get_version = match->data;
+ if (!get_version)
return -ENODEV;
- }
np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
if (!np)
@@ -115,23 +150,10 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
return PTR_ERR(speedbin_nvmem);
}
- speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+ ret = get_version(cpu_dev, speedbin_nvmem, &versions);
nvmem_cell_put(speedbin_nvmem);
- if (IS_ERR(speedbin))
- return PTR_ERR(speedbin);
-
- switch (msm8996_version) {
- case MSM8996_V3:
- versions = 1 << (unsigned int)(*speedbin);
- break;
- case MSM8996_SG:
- versions = 1 << ((unsigned int)(*speedbin) + 4);
- break;
- default:
- BUG();
- break;
- }
- kfree(speedbin);
+ if (ret)
+ return ret;
opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables), GFP_KERNEL);
if (!opp_tables)
@@ -174,7 +196,7 @@ free_opp:
return ret;
}
-static int qcom_cpufreq_kryo_remove(struct platform_device *pdev)
+static int qcom_cpufreq_remove(struct platform_device *pdev)
{
struct opp_table **opp_tables = platform_get_drvdata(pdev);
unsigned int cpu;
@@ -189,18 +211,20 @@ static int qcom_cpufreq_kryo_remove(struct platform_device *pdev)
return 0;
}
-static struct platform_driver qcom_cpufreq_kryo_driver = {
- .probe = qcom_cpufreq_kryo_probe,
- .remove = qcom_cpufreq_kryo_remove,
+static struct platform_driver qcom_cpufreq_driver = {
+ .probe = qcom_cpufreq_probe,
+ .remove = qcom_cpufreq_remove,
.driver = {
- .name = "qcom-cpufreq-kryo",
+ .name = "qcom-cpufreq-nvmem",
},
};
-static const struct of_device_id qcom_cpufreq_kryo_match_list[] __initconst = {
- { .compatible = "qcom,apq8096", },
- { .compatible = "qcom,msm8996", },
- {}
+static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
+ { .compatible = "qcom,apq8096",
+ .data = qcom_cpufreq_kryo_name_version },
+ { .compatible = "qcom,msm8996",
+ .data = qcom_cpufreq_kryo_name_version },
+ {},
};
/*
@@ -209,7 +233,7 @@ static const struct of_device_id qcom_cpufreq_kryo_match_list[] __initconst = {
* which may be defered as well. The init here is only registering
* the driver and the platform device.
*/
-static int __init qcom_cpufreq_kryo_init(void)
+static int __init qcom_cpufreq_init(void)
{
struct device_node *np = of_find_node_by_path("/");
const struct of_device_id *match;
@@ -218,32 +242,32 @@ static int __init qcom_cpufreq_kryo_init(void)
if (!np)
return -ENODEV;
- match = of_match_node(qcom_cpufreq_kryo_match_list, np);
+ match = of_match_node(qcom_cpufreq_match_list, np);
of_node_put(np);
if (!match)
return -ENODEV;
- ret = platform_driver_register(&qcom_cpufreq_kryo_driver);
+ ret = platform_driver_register(&qcom_cpufreq_driver);
if (unlikely(ret < 0))
return ret;
- kryo_cpufreq_pdev = platform_device_register_simple(
- "qcom-cpufreq-kryo", -1, NULL, 0);
- ret = PTR_ERR_OR_ZERO(kryo_cpufreq_pdev);
+ cpufreq_pdev = platform_device_register_data(NULL, "qcom-cpufreq-nvmem",
+ -1, match, sizeof(*match));
+ ret = PTR_ERR_OR_ZERO(cpufreq_pdev);
if (0 == ret)
return 0;
- platform_driver_unregister(&qcom_cpufreq_kryo_driver);
+ platform_driver_unregister(&qcom_cpufreq_driver);
return ret;
}
-module_init(qcom_cpufreq_kryo_init);
+module_init(qcom_cpufreq_init);
-static void __exit qcom_cpufreq_kryo_exit(void)
+static void __exit qcom_cpufreq_exit(void)
{
- platform_device_unregister(kryo_cpufreq_pdev);
- platform_driver_unregister(&qcom_cpufreq_kryo_driver);
+ platform_device_unregister(cpufreq_pdev);
+ platform_driver_unregister(&qcom_cpufreq_driver);
}
-module_exit(qcom_cpufreq_kryo_exit);
+module_exit(qcom_cpufreq_exit);
-MODULE_DESCRIPTION("Qualcomm Technologies, Inc. Kryo CPUfreq driver");
+MODULE_DESCRIPTION("Qualcomm Technologies, Inc. CPUfreq driver");
MODULE_LICENSE("GPL v2");