mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
PM / devfreq: rockchip: add devfreq driver for rk3399 dmc
base on dfi result, we do ddr frequency scaling, register dmc driver to devfreq framework, and use simple-ondemand policy. Signed-off-by: Lin Huang <hl@rock-chips.com> Signed-off-by: MyngJoo Ham <myngjoo.ham@samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Lin Huang
MyungJoo Ham
parent
c1ceb8f7c1
commit
5a893e31a6
3 changed files with 492 additions and 0 deletions
|
|
@ -100,6 +100,17 @@ config ARM_TEGRA_DEVFREQ
|
|||
It reads ACTMON counters of memory controllers and adjusts the
|
||||
operating frequencies and voltages with OPP support.
|
||||
|
||||
config ARM_RK3399_DMC_DEVFREQ
|
||||
tristate "ARM RK3399 DMC DEVFREQ Driver"
|
||||
depends on ARCH_ROCKCHIP
|
||||
select DEVFREQ_EVENT_ROCKCHIP_DFI
|
||||
select DEVFREQ_GOV_SIMPLE_ONDEMAND
|
||||
select PM_OPP
|
||||
help
|
||||
This adds the DEVFREQ driver for the RK3399 DMC(Dynamic Memory Controller).
|
||||
It sets the frequency for the memory controller and reads the usage counts
|
||||
from hardware.
|
||||
|
||||
source "drivers/devfreq/event/Kconfig"
|
||||
|
||||
endif # PM_DEVFREQ
|
||||
|
|
|
|||
|
|
@ -8,6 +8,7 @@ obj-$(CONFIG_DEVFREQ_GOV_PASSIVE) += governor_passive.o
|
|||
|
||||
# DEVFREQ Drivers
|
||||
obj-$(CONFIG_ARM_EXYNOS_BUS_DEVFREQ) += exynos-bus.o
|
||||
obj-$(CONFIG_ARM_RK3399_DMC_DEVFREQ) += rk3399_dmc.o
|
||||
obj-$(CONFIG_ARM_TEGRA_DEVFREQ) += tegra-devfreq.o
|
||||
|
||||
# DEVFREQ Event Drivers
|
||||
|
|
|
|||
480
drivers/devfreq/rk3399_dmc.c
Normal file
480
drivers/devfreq/rk3399_dmc.c
Normal file
|
|
@ -0,0 +1,480 @@
|
|||
/*
|
||||
* Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd.
|
||||
* Author: Lin Huang <hl@rock-chips.com>
|
||||
*
|
||||
* 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 <linux/arm-smccc.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/devfreq.h>
|
||||
#include <linux/devfreq-event.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/pm_opp.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
#include <linux/rwsem.h>
|
||||
#include <linux/suspend.h>
|
||||
|
||||
#include <soc/rockchip/rockchip_sip.h>
|
||||
|
||||
struct dram_timing {
|
||||
unsigned int ddr3_speed_bin;
|
||||
unsigned int pd_idle;
|
||||
unsigned int sr_idle;
|
||||
unsigned int sr_mc_gate_idle;
|
||||
unsigned int srpd_lite_idle;
|
||||
unsigned int standby_idle;
|
||||
unsigned int auto_pd_dis_freq;
|
||||
unsigned int dram_dll_dis_freq;
|
||||
unsigned int phy_dll_dis_freq;
|
||||
unsigned int ddr3_odt_dis_freq;
|
||||
unsigned int ddr3_drv;
|
||||
unsigned int ddr3_odt;
|
||||
unsigned int phy_ddr3_ca_drv;
|
||||
unsigned int phy_ddr3_dq_drv;
|
||||
unsigned int phy_ddr3_odt;
|
||||
unsigned int lpddr3_odt_dis_freq;
|
||||
unsigned int lpddr3_drv;
|
||||
unsigned int lpddr3_odt;
|
||||
unsigned int phy_lpddr3_ca_drv;
|
||||
unsigned int phy_lpddr3_dq_drv;
|
||||
unsigned int phy_lpddr3_odt;
|
||||
unsigned int lpddr4_odt_dis_freq;
|
||||
unsigned int lpddr4_drv;
|
||||
unsigned int lpddr4_dq_odt;
|
||||
unsigned int lpddr4_ca_odt;
|
||||
unsigned int phy_lpddr4_ca_drv;
|
||||
unsigned int phy_lpddr4_ck_cs_drv;
|
||||
unsigned int phy_lpddr4_dq_drv;
|
||||
unsigned int phy_lpddr4_odt;
|
||||
};
|
||||
|
||||
struct rk3399_dmcfreq {
|
||||
struct device *dev;
|
||||
struct devfreq *devfreq;
|
||||
struct devfreq_simple_ondemand_data ondemand_data;
|
||||
struct clk *dmc_clk;
|
||||
struct devfreq_event_dev *edev;
|
||||
struct mutex lock;
|
||||
struct dram_timing timing;
|
||||
|
||||
/*
|
||||
* DDR Converser of Frequency (DCF) is used to implement DDR frequency
|
||||
* conversion without the participation of CPU, we will implement and
|
||||
* control it in arm trust firmware.
|
||||
*/
|
||||
wait_queue_head_t wait_dcf_queue;
|
||||
int irq;
|
||||
int wait_dcf_flag;
|
||||
struct regulator *vdd_center;
|
||||
unsigned long rate, target_rate;
|
||||
unsigned long volt, target_volt;
|
||||
struct dev_pm_opp *curr_opp;
|
||||
};
|
||||
|
||||
static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq,
|
||||
u32 flags)
|
||||
{
|
||||
struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(dev);
|
||||
struct dev_pm_opp *opp;
|
||||
unsigned long old_clk_rate = dmcfreq->rate;
|
||||
unsigned long target_volt, target_rate;
|
||||
int err;
|
||||
|
||||
rcu_read_lock();
|
||||
opp = devfreq_recommended_opp(dev, freq, flags);
|
||||
if (IS_ERR(opp)) {
|
||||
rcu_read_unlock();
|
||||
return PTR_ERR(opp);
|
||||
}
|
||||
|
||||
target_rate = dev_pm_opp_get_freq(opp);
|
||||
target_volt = dev_pm_opp_get_voltage(opp);
|
||||
|
||||
dmcfreq->rate = dev_pm_opp_get_freq(dmcfreq->curr_opp);
|
||||
dmcfreq->volt = dev_pm_opp_get_voltage(dmcfreq->curr_opp);
|
||||
|
||||
rcu_read_unlock();
|
||||
|
||||
if (dmcfreq->rate == target_rate)
|
||||
return 0;
|
||||
|
||||
mutex_lock(&dmcfreq->lock);
|
||||
|
||||
/*
|
||||
* If frequency scaling from low to high, adjust voltage first.
|
||||
* If frequency scaling from high to low, adjust frequency first.
|
||||
*/
|
||||
if (old_clk_rate < target_rate) {
|
||||
err = regulator_set_voltage(dmcfreq->vdd_center, target_volt,
|
||||
target_volt);
|
||||
if (err) {
|
||||
dev_err(dev, "Cannot to set voltage %lu uV\n",
|
||||
target_volt);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
dmcfreq->wait_dcf_flag = 1;
|
||||
|
||||
err = clk_set_rate(dmcfreq->dmc_clk, target_rate);
|
||||
if (err) {
|
||||
dev_err(dev, "Cannot to set frequency %lu (%d)\n",
|
||||
target_rate, err);
|
||||
regulator_set_voltage(dmcfreq->vdd_center, dmcfreq->volt,
|
||||
dmcfreq->volt);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* Wait until bcf irq happen, it means freq scaling finish in
|
||||
* arm trust firmware, use 100ms as timeout time.
|
||||
*/
|
||||
if (!wait_event_timeout(dmcfreq->wait_dcf_queue,
|
||||
!dmcfreq->wait_dcf_flag, HZ / 10))
|
||||
dev_warn(dev, "Timeout waiting for dcf interrupt\n");
|
||||
|
||||
/*
|
||||
* Check the dpll rate,
|
||||
* There only two result we will get,
|
||||
* 1. Ddr frequency scaling fail, we still get the old rate.
|
||||
* 2. Ddr frequency scaling sucessful, we get the rate we set.
|
||||
*/
|
||||
dmcfreq->rate = clk_get_rate(dmcfreq->dmc_clk);
|
||||
|
||||
/* If get the incorrect rate, set voltage to old value. */
|
||||
if (dmcfreq->rate != target_rate) {
|
||||
dev_err(dev, "Get wrong ddr frequency, Request frequency %lu,\
|
||||
Current frequency %lu\n", target_rate, dmcfreq->rate);
|
||||
regulator_set_voltage(dmcfreq->vdd_center, dmcfreq->volt,
|
||||
dmcfreq->volt);
|
||||
goto out;
|
||||
} else if (old_clk_rate > target_rate)
|
||||
err = regulator_set_voltage(dmcfreq->vdd_center, target_volt,
|
||||
target_volt);
|
||||
if (err)
|
||||
dev_err(dev, "Cannot to set vol %lu uV\n", target_volt);
|
||||
|
||||
dmcfreq->curr_opp = opp;
|
||||
out:
|
||||
mutex_unlock(&dmcfreq->lock);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int rk3399_dmcfreq_get_dev_status(struct device *dev,
|
||||
struct devfreq_dev_status *stat)
|
||||
{
|
||||
struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(dev);
|
||||
struct devfreq_event_data edata;
|
||||
int ret = 0;
|
||||
|
||||
ret = devfreq_event_get_event(dmcfreq->edev, &edata);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
stat->current_frequency = dmcfreq->rate;
|
||||
stat->busy_time = edata.load_count;
|
||||
stat->total_time = edata.total_count;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rk3399_dmcfreq_get_cur_freq(struct device *dev, unsigned long *freq)
|
||||
{
|
||||
struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(dev);
|
||||
|
||||
*freq = dmcfreq->rate;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct devfreq_dev_profile rk3399_devfreq_dmc_profile = {
|
||||
.polling_ms = 200,
|
||||
.target = rk3399_dmcfreq_target,
|
||||
.get_dev_status = rk3399_dmcfreq_get_dev_status,
|
||||
.get_cur_freq = rk3399_dmcfreq_get_cur_freq,
|
||||
};
|
||||
|
||||
static __maybe_unused int rk3399_dmcfreq_suspend(struct device *dev)
|
||||
{
|
||||
struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(dev);
|
||||
int ret = 0;
|
||||
|
||||
ret = devfreq_event_disable_edev(dmcfreq->edev);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to disable the devfreq-event devices\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = devfreq_suspend_device(dmcfreq->devfreq);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to suspend the devfreq devices\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __maybe_unused int rk3399_dmcfreq_resume(struct device *dev)
|
||||
{
|
||||
struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(dev);
|
||||
int ret = 0;
|
||||
|
||||
ret = devfreq_event_enable_edev(dmcfreq->edev);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to enable the devfreq-event devices\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = devfreq_resume_device(dmcfreq->devfreq);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to resume the devfreq devices\n");
|
||||
return ret;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(rk3399_dmcfreq_pm, rk3399_dmcfreq_suspend,
|
||||
rk3399_dmcfreq_resume);
|
||||
|
||||
static irqreturn_t rk3399_dmc_irq(int irq, void *dev_id)
|
||||
{
|
||||
struct rk3399_dmcfreq *dmcfreq = dev_id;
|
||||
struct arm_smccc_res res;
|
||||
|
||||
dmcfreq->wait_dcf_flag = 0;
|
||||
wake_up(&dmcfreq->wait_dcf_queue);
|
||||
|
||||
/* Clear the DCF interrupt */
|
||||
arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, 0, 0,
|
||||
ROCKCHIP_SIP_CONFIG_DRAM_CLR_IRQ,
|
||||
0, 0, 0, 0, &res);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int of_get_ddr_timings(struct dram_timing *timing,
|
||||
struct device_node *np)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
ret = of_property_read_u32(np, "rockchip,ddr3_speed_bin",
|
||||
&timing->ddr3_speed_bin);
|
||||
ret |= of_property_read_u32(np, "rockchip,pd_idle",
|
||||
&timing->pd_idle);
|
||||
ret |= of_property_read_u32(np, "rockchip,sr_idle",
|
||||
&timing->sr_idle);
|
||||
ret |= of_property_read_u32(np, "rockchip,sr_mc_gate_idle",
|
||||
&timing->sr_mc_gate_idle);
|
||||
ret |= of_property_read_u32(np, "rockchip,srpd_lite_idle",
|
||||
&timing->srpd_lite_idle);
|
||||
ret |= of_property_read_u32(np, "rockchip,standby_idle",
|
||||
&timing->standby_idle);
|
||||
ret |= of_property_read_u32(np, "rockchip,auto_pd_dis_freq",
|
||||
&timing->auto_pd_dis_freq);
|
||||
ret |= of_property_read_u32(np, "rockchip,dram_dll_dis_freq",
|
||||
&timing->dram_dll_dis_freq);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_dll_dis_freq",
|
||||
&timing->phy_dll_dis_freq);
|
||||
ret |= of_property_read_u32(np, "rockchip,ddr3_odt_dis_freq",
|
||||
&timing->ddr3_odt_dis_freq);
|
||||
ret |= of_property_read_u32(np, "rockchip,ddr3_drv",
|
||||
&timing->ddr3_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,ddr3_odt",
|
||||
&timing->ddr3_odt);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_ddr3_ca_drv",
|
||||
&timing->phy_ddr3_ca_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_ddr3_dq_drv",
|
||||
&timing->phy_ddr3_dq_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_ddr3_odt",
|
||||
&timing->phy_ddr3_odt);
|
||||
ret |= of_property_read_u32(np, "rockchip,lpddr3_odt_dis_freq",
|
||||
&timing->lpddr3_odt_dis_freq);
|
||||
ret |= of_property_read_u32(np, "rockchip,lpddr3_drv",
|
||||
&timing->lpddr3_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,lpddr3_odt",
|
||||
&timing->lpddr3_odt);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_lpddr3_ca_drv",
|
||||
&timing->phy_lpddr3_ca_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_lpddr3_dq_drv",
|
||||
&timing->phy_lpddr3_dq_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_lpddr3_odt",
|
||||
&timing->phy_lpddr3_odt);
|
||||
ret |= of_property_read_u32(np, "rockchip,lpddr4_odt_dis_freq",
|
||||
&timing->lpddr4_odt_dis_freq);
|
||||
ret |= of_property_read_u32(np, "rockchip,lpddr4_drv",
|
||||
&timing->lpddr4_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,lpddr4_dq_odt",
|
||||
&timing->lpddr4_dq_odt);
|
||||
ret |= of_property_read_u32(np, "rockchip,lpddr4_ca_odt",
|
||||
&timing->lpddr4_ca_odt);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_lpddr4_ca_drv",
|
||||
&timing->phy_lpddr4_ca_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_lpddr4_ck_cs_drv",
|
||||
&timing->phy_lpddr4_ck_cs_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_lpddr4_dq_drv",
|
||||
&timing->phy_lpddr4_dq_drv);
|
||||
ret |= of_property_read_u32(np, "rockchip,phy_lpddr4_odt",
|
||||
&timing->phy_lpddr4_odt);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rk3399_dmcfreq_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct arm_smccc_res res;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct device_node *np = pdev->dev.of_node;
|
||||
struct rk3399_dmcfreq *data;
|
||||
int ret, irq, index, size;
|
||||
uint32_t *timing;
|
||||
struct dev_pm_opp *opp;
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq < 0) {
|
||||
dev_err(&pdev->dev, "Cannot get the dmc interrupt resource\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
data = devm_kzalloc(dev, sizeof(struct rk3399_dmcfreq), GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
mutex_init(&data->lock);
|
||||
|
||||
data->vdd_center = devm_regulator_get(dev, "center");
|
||||
if (IS_ERR(data->vdd_center)) {
|
||||
dev_err(dev, "Cannot get the regulator \"center\"\n");
|
||||
return PTR_ERR(data->vdd_center);
|
||||
}
|
||||
|
||||
data->dmc_clk = devm_clk_get(dev, "dmc_clk");
|
||||
if (IS_ERR(data->dmc_clk)) {
|
||||
dev_err(dev, "Cannot get the clk dmc_clk\n");
|
||||
return PTR_ERR(data->dmc_clk);
|
||||
};
|
||||
|
||||
data->irq = irq;
|
||||
ret = devm_request_irq(dev, irq, rk3399_dmc_irq, 0,
|
||||
dev_name(dev), data);
|
||||
if (ret) {
|
||||
dev_err(dev, "Failed to request dmc irq: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
init_waitqueue_head(&data->wait_dcf_queue);
|
||||
data->wait_dcf_flag = 0;
|
||||
|
||||
data->edev = devfreq_event_get_edev_by_phandle(dev, 0);
|
||||
if (IS_ERR(data->edev))
|
||||
return -EPROBE_DEFER;
|
||||
|
||||
ret = devfreq_event_enable_edev(data->edev);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "failed to enable devfreq-event devices\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Get dram timing and pass it to arm trust firmware,
|
||||
* the dram drvier in arm trust firmware will get these
|
||||
* timing and to do dram initial.
|
||||
*/
|
||||
if (!of_get_ddr_timings(&data->timing, np)) {
|
||||
timing = &data->timing.ddr3_speed_bin;
|
||||
size = sizeof(struct dram_timing) / 4;
|
||||
for (index = 0; index < size; index++) {
|
||||
arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, *timing++, index,
|
||||
ROCKCHIP_SIP_CONFIG_DRAM_SET_PARAM,
|
||||
0, 0, 0, 0, &res);
|
||||
if (res.a0) {
|
||||
dev_err(dev, "Failed to set dram param: %ld\n",
|
||||
res.a0);
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, 0, 0,
|
||||
ROCKCHIP_SIP_CONFIG_DRAM_INIT,
|
||||
0, 0, 0, 0, &res);
|
||||
|
||||
/*
|
||||
* We add a devfreq driver to our parent since it has a device tree node
|
||||
* with operating points.
|
||||
*/
|
||||
if (dev_pm_opp_of_add_table(dev)) {
|
||||
dev_err(dev, "Invalid operating-points in device tree.\n");
|
||||
rcu_read_unlock();
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
of_property_read_u32(np, "upthreshold",
|
||||
&data->ondemand_data.upthreshold);
|
||||
of_property_read_u32(np, "downdifferential",
|
||||
&data->ondemand_data.downdifferential);
|
||||
|
||||
data->rate = clk_get_rate(data->dmc_clk);
|
||||
|
||||
rcu_read_lock();
|
||||
opp = devfreq_recommended_opp(dev, &data->rate, 0);
|
||||
if (IS_ERR(opp)) {
|
||||
rcu_read_unlock();
|
||||
return PTR_ERR(opp);
|
||||
}
|
||||
rcu_read_unlock();
|
||||
data->curr_opp = opp;
|
||||
|
||||
rk3399_devfreq_dmc_profile.initial_freq = data->rate;
|
||||
|
||||
data->devfreq = devfreq_add_device(dev,
|
||||
&rk3399_devfreq_dmc_profile,
|
||||
"simple_ondemand",
|
||||
&data->ondemand_data);
|
||||
if (IS_ERR(data->devfreq))
|
||||
return PTR_ERR(data->devfreq);
|
||||
devm_devfreq_register_opp_notifier(dev, data->devfreq);
|
||||
|
||||
data->dev = dev;
|
||||
platform_set_drvdata(pdev, data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rk3399_dmcfreq_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct rk3399_dmcfreq *dmcfreq = platform_get_drvdata(pdev);
|
||||
|
||||
regulator_put(dmcfreq->vdd_center);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id rk3399dmc_devfreq_of_match[] = {
|
||||
{ .compatible = "rockchip,rk3399-dmc" },
|
||||
{ },
|
||||
};
|
||||
|
||||
static struct platform_driver rk3399_dmcfreq_driver = {
|
||||
.probe = rk3399_dmcfreq_probe,
|
||||
.remove = rk3399_dmcfreq_remove,
|
||||
.driver = {
|
||||
.name = "rk3399-dmc-freq",
|
||||
.pm = &rk3399_dmcfreq_pm,
|
||||
.of_match_table = rk3399dmc_devfreq_of_match,
|
||||
},
|
||||
};
|
||||
module_platform_driver(rk3399_dmcfreq_driver);
|
||||
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("Lin Huang <hl@rock-chips.com>");
|
||||
MODULE_DESCRIPTION("RK3399 dmcfreq driver with devfreq framework");
|
||||
Loading…
Reference in a new issue