Re: [PATCH v4 5/7] PM / devfreq: event: support rockchip dfi controller
Hi Lin, On 2016년 08월 01일 17:27, hl wrote: > Hi Chanwoo Choi, > > On 2016年08月01日 16:08, Chanwoo Choi wrote: >> Hi Lin, >> >> I add the one minor comment for full name of 'DRI'. >> >> On 2016년 08월 01일 16:41, Chanwoo Choi wrote: >>> Hi Lin, >>> >>> Because you remove the 'RFC' prefix on patch title, >>> I think that you better to make the documentation as following: >>> - Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt >>> >>> Regards, >>> Chanwoo Choi >>> >>> On 2016년 07월 29일 16:56, Lin Huang wrote: on rk3399 platform, there is dfi conroller can monitor ddr load, base on this result, we can do ddr freqency scaling. Signed-off-by: Lin Huang Acked-by: Chanwoo Choi --- Changes in v4: - None Changes in v3: - None Changes in v2: - use clk_disable_unprepare and clk_enable_prepare - remove clk_enable_prepare in probe - remove rockchip_dfi_remove function Changes in v1: - None drivers/devfreq/event/Kconfig| 7 + drivers/devfreq/event/Makefile | 1 + drivers/devfreq/event/rockchip-dfi.c | 253 +++ 3 files changed, 261 insertions(+) create mode 100644 drivers/devfreq/event/rockchip-dfi.c diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig index a11720a..ff9279f 100644 --- a/drivers/devfreq/event/Kconfig +++ b/drivers/devfreq/event/Kconfig @@ -22,4 +22,11 @@ config DEVFREQ_EVENT_EXYNOS_PPMU (Platform Performance Monitoring Unit) counters to estimate the utilization of each module. +config DEVFREQ_EVENT_ROCKCHIP_DFI +tristate "ROCKCHIP DFI DEVFREQ event Driver" +depends on ARCH_ROCKCHIP +help + This add the devfreq-event driver for Rockchip SoC. It provides DFI + (DDR Monitor Module) driver to count ddr load. >> The DFI is "DDR Monitor Module" full name? I need the correct abbreviation >> and full name. > We just call this module DFI in datasheet, and this module function is ddr > monitor module, > yes, it is do not fit the full name, but i think it is better follow the > datasheet name. Are there any full name of DFI? If the people who don't know the detailed history about this workd (DFI), it causes the confusion and they don't understand it. I think that if you want to use the DFI work, you need to add the more detailed description why DFI word is used. >> + endif # PM_DEVFREQ_EVENT diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile index be146ea..e3f88fc 100644 --- a/drivers/devfreq/event/Makefile +++ b/drivers/devfreq/event/Makefile @@ -1,2 +1,3 @@ # Exynos DEVFREQ Event Drivers obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o +obj-$(CONFIG_DEVFREQ_EVENT_ROCKCHIP_DFI) += rockchip-dfi.o diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c new file mode 100644 index 000..96a0307 --- /dev/null +++ b/drivers/devfreq/event/rockchip-dfi.c @@ -0,0 +1,253 @@ +/* + * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd + * Author: Lin Huang + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RK3399_DMC_NUM_CH2 + +/* DDRMON_CTRL */ +#define DDRMON_CTRL0x04 +#define CLR_DDRMON_CTRL(0x1f << 0) +#define LPDDR4_EN(0x10001 << 4) +#define HARDWARE_EN(0x10001 << 3) +#define LPDDR3_EN(0x10001 << 2) +#define SOFTWARE_EN(0x10001 << 1) +#define TIME_CNT_EN(0x10001 << 0) [snip] +}; +module_platform_driver(rockchip_dfi_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Lin Huang "); +MODULE_DESCRIPTION("Rockchip dfi driver"); >> s/dfi -> DFI You should use the capital letter. Regards, Chanwoo Choi
Re: [PATCH v4 5/7] PM / devfreq: event: support rockchip dfi controller
Hi Chanwoo Choi, On 2016年08月01日 16:08, Chanwoo Choi wrote: Hi Lin, I add the one minor comment for full name of 'DRI'. On 2016년 08월 01일 16:41, Chanwoo Choi wrote: Hi Lin, Because you remove the 'RFC' prefix on patch title, I think that you better to make the documentation as following: - Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt Regards, Chanwoo Choi On 2016년 07월 29일 16:56, Lin Huang wrote: on rk3399 platform, there is dfi conroller can monitor ddr load, base on this result, we can do ddr freqency scaling. Signed-off-by: Lin Huang Acked-by: Chanwoo Choi --- Changes in v4: - None Changes in v3: - None Changes in v2: - use clk_disable_unprepare and clk_enable_prepare - remove clk_enable_prepare in probe - remove rockchip_dfi_remove function Changes in v1: - None drivers/devfreq/event/Kconfig| 7 + drivers/devfreq/event/Makefile | 1 + drivers/devfreq/event/rockchip-dfi.c | 253 +++ 3 files changed, 261 insertions(+) create mode 100644 drivers/devfreq/event/rockchip-dfi.c diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig index a11720a..ff9279f 100644 --- a/drivers/devfreq/event/Kconfig +++ b/drivers/devfreq/event/Kconfig @@ -22,4 +22,11 @@ config DEVFREQ_EVENT_EXYNOS_PPMU (Platform Performance Monitoring Unit) counters to estimate the utilization of each module. +config DEVFREQ_EVENT_ROCKCHIP_DFI + tristate "ROCKCHIP DFI DEVFREQ event Driver" + depends on ARCH_ROCKCHIP + help + This add the devfreq-event driver for Rockchip SoC. It provides DFI + (DDR Monitor Module) driver to count ddr load. The DFI is "DDR Monitor Module" full name? I need the correct abbreviation and full name. We just call this module DFI in datasheet, and this module function is ddr monitor module, yes, it is do not fit the full name, but i think it is better follow the datasheet name. + endif # PM_DEVFREQ_EVENT diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile index be146ea..e3f88fc 100644 --- a/drivers/devfreq/event/Makefile +++ b/drivers/devfreq/event/Makefile @@ -1,2 +1,3 @@ # Exynos DEVFREQ Event Drivers obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o +obj-$(CONFIG_DEVFREQ_EVENT_ROCKCHIP_DFI) += rockchip-dfi.o diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c new file mode 100644 index 000..96a0307 --- /dev/null +++ b/drivers/devfreq/event/rockchip-dfi.c @@ -0,0 +1,253 @@ +/* + * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd + * Author: Lin Huang + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RK3399_DMC_NUM_CH 2 + +/* DDRMON_CTRL */ +#define DDRMON_CTRL0x04 +#define CLR_DDRMON_CTRL(0x1f << 0) +#define LPDDR4_EN (0x10001 << 4) +#define HARDWARE_EN(0x10001 << 3) +#define LPDDR3_EN (0x10001 << 2) +#define SOFTWARE_EN(0x10001 << 1) +#define TIME_CNT_EN(0x10001 << 0) + +#define DDRMON_CH0_COUNT_NUM 0x28 +#define DDRMON_CH0_DFI_ACCESS_NUM 0x2c +#define DDRMON_CH1_COUNT_NUM 0x3c +#define DDRMON_CH1_DFI_ACCESS_NUM 0x40 + +/* pmu grf */ +#define PMUGRF_OS_REG2 0x308 +#define DDRTYPE_SHIFT 13 +#define DDRTYPE_MASK 7 + +enum { + DDR3 = 3, + LPDDR3 = 6, + LPDDR4 = 7, + UNUSED = 0xFF +}; + +struct dmc_usage { + u32 access; + u32 total; +}; + +struct rockchip_dfi { + struct devfreq_event_dev *edev; + struct devfreq_event_desc *desc; + struct dmc_usage ch_usage[RK3399_DMC_NUM_CH]; + struct device *dev; + void __iomem *regs; + struct regmap *regmap_pmu; + struct clk *clk; +}; + +static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev) +{ + struct rockchip_dfi *info = devfreq_event_get_drvdata(edev); + void __iomem *dfi_regs = info->regs; + u32 val; + u32 ddr_type; + + /* get ddr type */ + regmap_read(info->regmap_pmu, PMUGRF_OS_REG2, &val); + ddr_type = (val >> DDRTYPE_SHIFT) & DDRTYPE_MASK; + + /* clear DDRMON_CTRL setting */ + writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL); + + /* set ddr type to dfi */ + if (ddr_type == LPDDR3) + writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL); + else if (ddr_type == LPDDR4) + writel_rel
Re: [PATCH v4 5/7] PM / devfreq: event: support rockchip dfi controller
Hi Lin, I add the one minor comment for full name of 'DRI'. On 2016년 08월 01일 16:41, Chanwoo Choi wrote: > Hi Lin, > > Because you remove the 'RFC' prefix on patch title, > I think that you better to make the documentation as following: > - Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt > > Regards, > Chanwoo Choi > > On 2016년 07월 29일 16:56, Lin Huang wrote: >> on rk3399 platform, there is dfi conroller can monitor >> ddr load, base on this result, we can do ddr freqency >> scaling. >> >> Signed-off-by: Lin Huang >> Acked-by: Chanwoo Choi >> --- >> Changes in v4: >> - None >> >> Changes in v3: >> - None >> >> Changes in v2: >> - use clk_disable_unprepare and clk_enable_prepare >> - remove clk_enable_prepare in probe >> - remove rockchip_dfi_remove function >> >> Changes in v1: >> - None >> >> drivers/devfreq/event/Kconfig| 7 + >> drivers/devfreq/event/Makefile | 1 + >> drivers/devfreq/event/rockchip-dfi.c | 253 >> +++ >> 3 files changed, 261 insertions(+) >> create mode 100644 drivers/devfreq/event/rockchip-dfi.c >> >> diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig >> index a11720a..ff9279f 100644 >> --- a/drivers/devfreq/event/Kconfig >> +++ b/drivers/devfreq/event/Kconfig >> @@ -22,4 +22,11 @@ config DEVFREQ_EVENT_EXYNOS_PPMU >>(Platform Performance Monitoring Unit) counters to estimate the >>utilization of each module. >> >> +config DEVFREQ_EVENT_ROCKCHIP_DFI >> +tristate "ROCKCHIP DFI DEVFREQ event Driver" >> +depends on ARCH_ROCKCHIP >> +help >> + This add the devfreq-event driver for Rockchip SoC. It provides DFI >> + (DDR Monitor Module) driver to count ddr load. The DFI is "DDR Monitor Module" full name? I need the correct abbreviation and full name. >> + >> endif # PM_DEVFREQ_EVENT >> diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile >> index be146ea..e3f88fc 100644 >> --- a/drivers/devfreq/event/Makefile >> +++ b/drivers/devfreq/event/Makefile >> @@ -1,2 +1,3 @@ >> # Exynos DEVFREQ Event Drivers >> obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o >> +obj-$(CONFIG_DEVFREQ_EVENT_ROCKCHIP_DFI) += rockchip-dfi.o >> diff --git a/drivers/devfreq/event/rockchip-dfi.c >> b/drivers/devfreq/event/rockchip-dfi.c >> new file mode 100644 >> index 000..96a0307 >> --- /dev/null >> +++ b/drivers/devfreq/event/rockchip-dfi.c >> @@ -0,0 +1,253 @@ >> +/* >> + * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd >> + * Author: Lin Huang >> + * >> + * This program is free software; you can redistribute it and/or modify it >> + * under the terms and conditions of the GNU General Public License, >> + * version 2, as published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope it will be useful, but WITHOUT >> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or >> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for >> + * more details. >> + */ >> + >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> +#include >> + >> +#define RK3399_DMC_NUM_CH 2 >> + >> +/* DDRMON_CTRL */ >> +#define DDRMON_CTRL 0x04 >> +#define CLR_DDRMON_CTRL (0x1f << 0) >> +#define LPDDR4_EN (0x10001 << 4) >> +#define HARDWARE_EN (0x10001 << 3) >> +#define LPDDR3_EN (0x10001 << 2) >> +#define SOFTWARE_EN (0x10001 << 1) >> +#define TIME_CNT_EN (0x10001 << 0) >> + >> +#define DDRMON_CH0_COUNT_NUM0x28 >> +#define DDRMON_CH0_DFI_ACCESS_NUM 0x2c >> +#define DDRMON_CH1_COUNT_NUM0x3c >> +#define DDRMON_CH1_DFI_ACCESS_NUM 0x40 >> + >> +/* pmu grf */ >> +#define PMUGRF_OS_REG2 0x308 >> +#define DDRTYPE_SHIFT 13 >> +#define DDRTYPE_MASK7 >> + >> +enum { >> +DDR3 = 3, >> +LPDDR3 = 6, >> +LPDDR4 = 7, >> +UNUSED = 0xFF >> +}; >> + >> +struct dmc_usage { >> +u32 access; >> +u32 total; >> +}; >> + >> +struct rockchip_dfi { >> +struct devfreq_event_dev *edev; >> +struct devfreq_event_desc *desc; >> +struct dmc_usage ch_usage[RK3399_DMC_NUM_CH]; >> +struct device *dev; >> +void __iomem *regs; >> +struct regmap *regmap_pmu; >> +struct clk *clk; >> +}; >> + >> +static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev >> *edev) >> +{ >> +struct rockchip_dfi *info = devfreq_event_get_drvdata(edev); >> +void __iomem *dfi_regs = info->regs; >> +u32 val; >> +u32 ddr_type; >> + >> +/* get ddr type */ >> +regmap_read(info->regmap_pmu, PMUGRF_OS_REG2, &val); >> +ddr_type = (val >> DDRTYPE_SHIFT) & DDRTYPE_MASK; >> + >> +/* clear DDRMON_CTRL setting */ >> +writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL); >> + >> +/* set ddr type to dfi */ >> +if (ddr_type == LPDDR3) >> +writel_rela
Re: [PATCH v4 5/7] PM / devfreq: event: support rockchip dfi controller
Hi Lin, Because you remove the 'RFC' prefix on patch title, I think that you better to make the documentation as following: - Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt Regards, Chanwoo Choi On 2016년 07월 29일 16:56, Lin Huang wrote: > on rk3399 platform, there is dfi conroller can monitor > ddr load, base on this result, we can do ddr freqency > scaling. > > Signed-off-by: Lin Huang > Acked-by: Chanwoo Choi > --- > Changes in v4: > - None > > Changes in v3: > - None > > Changes in v2: > - use clk_disable_unprepare and clk_enable_prepare > - remove clk_enable_prepare in probe > - remove rockchip_dfi_remove function > > Changes in v1: > - None > > drivers/devfreq/event/Kconfig| 7 + > drivers/devfreq/event/Makefile | 1 + > drivers/devfreq/event/rockchip-dfi.c | 253 > +++ > 3 files changed, 261 insertions(+) > create mode 100644 drivers/devfreq/event/rockchip-dfi.c > > diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig > index a11720a..ff9279f 100644 > --- a/drivers/devfreq/event/Kconfig > +++ b/drivers/devfreq/event/Kconfig > @@ -22,4 +22,11 @@ config DEVFREQ_EVENT_EXYNOS_PPMU > (Platform Performance Monitoring Unit) counters to estimate the > utilization of each module. > > +config DEVFREQ_EVENT_ROCKCHIP_DFI > + tristate "ROCKCHIP DFI DEVFREQ event Driver" > + depends on ARCH_ROCKCHIP > + help > + This add the devfreq-event driver for Rockchip SoC. It provides DFI > + (DDR Monitor Module) driver to count ddr load. > + > endif # PM_DEVFREQ_EVENT > diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile > index be146ea..e3f88fc 100644 > --- a/drivers/devfreq/event/Makefile > +++ b/drivers/devfreq/event/Makefile > @@ -1,2 +1,3 @@ > # Exynos DEVFREQ Event Drivers > obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o > +obj-$(CONFIG_DEVFREQ_EVENT_ROCKCHIP_DFI) += rockchip-dfi.o > diff --git a/drivers/devfreq/event/rockchip-dfi.c > b/drivers/devfreq/event/rockchip-dfi.c > new file mode 100644 > index 000..96a0307 > --- /dev/null > +++ b/drivers/devfreq/event/rockchip-dfi.c > @@ -0,0 +1,253 @@ > +/* > + * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd > + * Author: Lin Huang > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope it will be useful, but WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for > + * more details. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define RK3399_DMC_NUM_CH2 > + > +/* DDRMON_CTRL */ > +#define DDRMON_CTRL 0x04 > +#define CLR_DDRMON_CTRL (0x1f << 0) > +#define LPDDR4_EN(0x10001 << 4) > +#define HARDWARE_EN (0x10001 << 3) > +#define LPDDR3_EN(0x10001 << 2) > +#define SOFTWARE_EN (0x10001 << 1) > +#define TIME_CNT_EN (0x10001 << 0) > + > +#define DDRMON_CH0_COUNT_NUM 0x28 > +#define DDRMON_CH0_DFI_ACCESS_NUM0x2c > +#define DDRMON_CH1_COUNT_NUM 0x3c > +#define DDRMON_CH1_DFI_ACCESS_NUM0x40 > + > +/* pmu grf */ > +#define PMUGRF_OS_REG2 0x308 > +#define DDRTYPE_SHIFT13 > +#define DDRTYPE_MASK 7 > + > +enum { > + DDR3 = 3, > + LPDDR3 = 6, > + LPDDR4 = 7, > + UNUSED = 0xFF > +}; > + > +struct dmc_usage { > + u32 access; > + u32 total; > +}; > + > +struct rockchip_dfi { > + struct devfreq_event_dev *edev; > + struct devfreq_event_desc *desc; > + struct dmc_usage ch_usage[RK3399_DMC_NUM_CH]; > + struct device *dev; > + void __iomem *regs; > + struct regmap *regmap_pmu; > + struct clk *clk; > +}; > + > +static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev > *edev) > +{ > + struct rockchip_dfi *info = devfreq_event_get_drvdata(edev); > + void __iomem *dfi_regs = info->regs; > + u32 val; > + u32 ddr_type; > + > + /* get ddr type */ > + regmap_read(info->regmap_pmu, PMUGRF_OS_REG2, &val); > + ddr_type = (val >> DDRTYPE_SHIFT) & DDRTYPE_MASK; > + > + /* clear DDRMON_CTRL setting */ > + writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL); > + > + /* set ddr type to dfi */ > + if (ddr_type == LPDDR3) > + writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL); > + else if (ddr_type == LPDDR4) > + writel_relaxed(LPDDR4_EN, dfi_regs + DDRMON_CTRL); > + > + /* enable count, use software mode */ > + writel_relaxed(SOFTWARE_EN, dfi_regs + DDRMON_CTRL); > +} > + > +static void rockchip_dfi_stop_hardware_counter(struct devfreq_event_dev
[PATCH v4 5/7] PM / devfreq: event: support rockchip dfi controller
on rk3399 platform, there is dfi conroller can monitor ddr load, base on this result, we can do ddr freqency scaling. Signed-off-by: Lin Huang Acked-by: Chanwoo Choi --- Changes in v4: - None Changes in v3: - None Changes in v2: - use clk_disable_unprepare and clk_enable_prepare - remove clk_enable_prepare in probe - remove rockchip_dfi_remove function Changes in v1: - None drivers/devfreq/event/Kconfig| 7 + drivers/devfreq/event/Makefile | 1 + drivers/devfreq/event/rockchip-dfi.c | 253 +++ 3 files changed, 261 insertions(+) create mode 100644 drivers/devfreq/event/rockchip-dfi.c diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig index a11720a..ff9279f 100644 --- a/drivers/devfreq/event/Kconfig +++ b/drivers/devfreq/event/Kconfig @@ -22,4 +22,11 @@ config DEVFREQ_EVENT_EXYNOS_PPMU (Platform Performance Monitoring Unit) counters to estimate the utilization of each module. +config DEVFREQ_EVENT_ROCKCHIP_DFI + tristate "ROCKCHIP DFI DEVFREQ event Driver" + depends on ARCH_ROCKCHIP + help + This add the devfreq-event driver for Rockchip SoC. It provides DFI + (DDR Monitor Module) driver to count ddr load. + endif # PM_DEVFREQ_EVENT diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile index be146ea..e3f88fc 100644 --- a/drivers/devfreq/event/Makefile +++ b/drivers/devfreq/event/Makefile @@ -1,2 +1,3 @@ # Exynos DEVFREQ Event Drivers obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o +obj-$(CONFIG_DEVFREQ_EVENT_ROCKCHIP_DFI) += rockchip-dfi.o diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c new file mode 100644 index 000..96a0307 --- /dev/null +++ b/drivers/devfreq/event/rockchip-dfi.c @@ -0,0 +1,253 @@ +/* + * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd + * Author: Lin Huang + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RK3399_DMC_NUM_CH 2 + +/* DDRMON_CTRL */ +#define DDRMON_CTRL0x04 +#define CLR_DDRMON_CTRL(0x1f << 0) +#define LPDDR4_EN (0x10001 << 4) +#define HARDWARE_EN(0x10001 << 3) +#define LPDDR3_EN (0x10001 << 2) +#define SOFTWARE_EN(0x10001 << 1) +#define TIME_CNT_EN(0x10001 << 0) + +#define DDRMON_CH0_COUNT_NUM 0x28 +#define DDRMON_CH0_DFI_ACCESS_NUM 0x2c +#define DDRMON_CH1_COUNT_NUM 0x3c +#define DDRMON_CH1_DFI_ACCESS_NUM 0x40 + +/* pmu grf */ +#define PMUGRF_OS_REG2 0x308 +#define DDRTYPE_SHIFT 13 +#define DDRTYPE_MASK 7 + +enum { + DDR3 = 3, + LPDDR3 = 6, + LPDDR4 = 7, + UNUSED = 0xFF +}; + +struct dmc_usage { + u32 access; + u32 total; +}; + +struct rockchip_dfi { + struct devfreq_event_dev *edev; + struct devfreq_event_desc *desc; + struct dmc_usage ch_usage[RK3399_DMC_NUM_CH]; + struct device *dev; + void __iomem *regs; + struct regmap *regmap_pmu; + struct clk *clk; +}; + +static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev) +{ + struct rockchip_dfi *info = devfreq_event_get_drvdata(edev); + void __iomem *dfi_regs = info->regs; + u32 val; + u32 ddr_type; + + /* get ddr type */ + regmap_read(info->regmap_pmu, PMUGRF_OS_REG2, &val); + ddr_type = (val >> DDRTYPE_SHIFT) & DDRTYPE_MASK; + + /* clear DDRMON_CTRL setting */ + writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL); + + /* set ddr type to dfi */ + if (ddr_type == LPDDR3) + writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL); + else if (ddr_type == LPDDR4) + writel_relaxed(LPDDR4_EN, dfi_regs + DDRMON_CTRL); + + /* enable count, use software mode */ + writel_relaxed(SOFTWARE_EN, dfi_regs + DDRMON_CTRL); +} + +static void rockchip_dfi_stop_hardware_counter(struct devfreq_event_dev *edev) +{ + struct rockchip_dfi *info = devfreq_event_get_drvdata(edev); + void __iomem *dfi_regs = info->regs; + u32 val; + + val = readl_relaxed(dfi_regs + DDRMON_CTRL); + val &= ~SOFTWARE_EN; + writel_relaxed(val, dfi_regs + DDRMON_CTRL); +} + +static int rockchip_dfi_get_busier_ch(struct devfreq_event_dev *edev) +{ + struct rockchip_dfi *info = devfreq_event_get_drvdata(edev); + u32 tmp, max = 0; + u32 i, busier_ch = 0; +