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PM / devfreq: event: add support for rk3128 dfi

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This adds the necessary data for handling dfi on the rk3128.
Access the dfi via registers provided by GRF (general register
files) module.

Change-Id: Ife9e9987224088434e878102b7d1c3b132e761ad
Signed-off-by: Liang Chen <cl@rock-chips.com>
This commit is contained in:
Liang Chen
2017-09-05 15:32:02 +08:00
committed by Tao Huang
parent 7a400740a9
commit 3b90ebfa1c
2 changed files with 98 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt
+1
View File
@@ -3,6 +3,7 @@
Required properties:
- compatible: Should be one of the following.
- "rockchip,rk3128-dfi" - for RK3128 SoCs.
- "rockchip,rk3288-dfi" - for RK3288 SoCs.
- "rockchip,rk3368-dfi" - for RK3368 SoCs.
- "rockchip,rk3399-dfi" - for RK3399 SoCs.
drivers/devfreq/event/rockchip-dfi.c
+97 -1
View File
@@ -26,6 +26,14 @@
#include <linux/list.h>
#include <linux/of.h>
#define RK3128_GRF_SOC_CON0 0x140
#define RK3128_GRF_OS_REG1 0x1cc
#define RK3128_GRF_DFI_WRNUM 0x220
#define RK3128_GRF_DFI_RDNUM 0x224
#define RK3128_GRF_DFI_TIMERVAL 0x22c
#define RK3128_DDR_MONITOR_EN ((1 << (16 + 6)) + (1 << 6))
#define RK3128_DDR_MONITOR_DISB ((1 << (16 + 6)) + (0 << 6))
#define RK3288_PMU_SYS_REG2 0x9c
#define RK3288_GRF_SOC_CON4 0x254
#define RK3288_GRF_SOC_STATUS(n) (0x280 + (n) * 4)
@@ -94,6 +102,75 @@ struct rockchip_dfi {
struct clk *clk;
};
static void rk3128_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
{
struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
regmap_write(info->regmap_grf,
RK3128_GRF_SOC_CON0,
RK3128_DDR_MONITOR_EN);
}
static void rk3128_dfi_stop_hardware_counter(struct devfreq_event_dev *edev)
{
struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
regmap_write(info->regmap_grf,
RK3128_GRF_SOC_CON0,
RK3128_DDR_MONITOR_DISB);
}
static int rk3128_dfi_disable(struct devfreq_event_dev *edev)
{
rk3128_dfi_stop_hardware_counter(edev);
return 0;
}
static int rk3128_dfi_enable(struct devfreq_event_dev *edev)
{
rk3128_dfi_start_hardware_counter(edev);
return 0;
}
static int rk3128_dfi_set_event(struct devfreq_event_dev *edev)
{
return 0;
}
static int rk3128_dfi_get_event(struct devfreq_event_dev *edev,
struct devfreq_event_data *edata)
{
struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
unsigned long flags;
u32 dfi_wr, dfi_rd, dfi_timer;
local_irq_save(flags);
rk3128_dfi_stop_hardware_counter(edev);
regmap_read(info->regmap_grf, RK3128_GRF_DFI_WRNUM, &dfi_wr);
regmap_read(info->regmap_grf, RK3128_GRF_DFI_RDNUM, &dfi_rd);
regmap_read(info->regmap_grf, RK3128_GRF_DFI_TIMERVAL, &dfi_timer);
edata->load_count = (dfi_wr + dfi_rd) * 4;
edata->total_count = dfi_timer;
rk3128_dfi_start_hardware_counter(edev);
local_irq_restore(flags);
return 0;
}
static const struct devfreq_event_ops rk3128_dfi_ops = {
.disable = rk3128_dfi_disable,
.enable = rk3128_dfi_enable,
.get_event = rk3128_dfi_get_event,
.set_event = rk3128_dfi_set_event,
};
static void rk3288_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
{
struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
@@ -360,6 +437,24 @@ static const struct devfreq_event_ops rockchip_dfi_ops = {
.set_event = rockchip_dfi_set_event,
};
static __init int rk3128_dfi_init(struct platform_device *pdev,
struct rockchip_dfi *data,
struct devfreq_event_desc *desc)
{
struct device_node *np = pdev->dev.of_node, *node;
node = of_parse_phandle(np, "rockchip,grf", 0);
if (node) {
data->regmap_grf = syscon_node_to_regmap(node);
if (IS_ERR(data->regmap_grf))
return PTR_ERR(data->regmap_grf);
}
desc->ops = &rk3128_dfi_ops;
return 0;
}
static __init int rk3288_dfi_init(struct platform_device *pdev,
struct rockchip_dfi *data,
struct devfreq_event_desc *desc)
@@ -431,7 +526,7 @@ static __init int rockchip_dfi_init(struct platform_device *pdev,
if (IS_ERR(data->clk)) {
dev_err(dev, "Cannot get the clk dmc_clk\n");
return PTR_ERR(data->clk);
};
}
/* try to find the optional reference to the pmu syscon */
node = of_parse_phandle(np, "rockchip,pmu", 0);
@@ -447,6 +542,7 @@ static __init int rockchip_dfi_init(struct platform_device *pdev,
}
static const struct of_device_id rockchip_dfi_id_match[] = {
{ .compatible = "rockchip,rk3128-dfi", .data = rk3128_dfi_init },
{ .compatible = "rockchip,rk3288-dfi", .data = rk3288_dfi_init },
{ .compatible = "rockchip,rk3368-dfi", .data = rk3368_dfi_init },
{ .compatible = "rockchip,rk3399-dfi", .data = rockchip_dfi_init },