153 lines
4.5 KiB
Diff
153 lines
4.5 KiB
Diff
From 7d494650c32b81e22b0268b1209118ea11253a97 Mon Sep 17 00:00:00 2001
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From: Liang Chen <cl@rock-chips.com>
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Date: Tue, 5 Sep 2017 15:32:02 +0800
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Subject: [PATCH] PM / devfreq: event: add support for rk3128 dfi
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This adds the necessary data for handling dfi on the rk3128.
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Access the dfi via registers provided by GRF (general register
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files) module.
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Change-Id: Ife9e9987224088434e878102b7d1c3b132e761ad
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Signed-off-by: Liang Chen <cl@rock-chips.com>
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---
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.../bindings/devfreq/event/rockchip-dfi.txt | 1 +
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drivers/devfreq/event/rockchip-dfi.c | 96 +++++++++++++++++++
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2 files changed, 97 insertions(+)
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--- a/Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt
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+++ b/Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt
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@@ -3,6 +3,7 @@
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Required properties:
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- compatible: Should be one of the following.
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+ - "rockchip,rk3128-dfi" - for RK3128 SoCs.
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- "rockchip,rk3288-dfi" - for RK3288 SoCs.
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- "rockchip,rk3368-dfi" - for RK3368 SoCs.
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- "rockchip,rk3399-dfi" - for RK3399 SoCs.
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--- a/drivers/devfreq/event/rockchip-dfi.c
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+++ b/drivers/devfreq/event/rockchip-dfi.c
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@@ -20,6 +20,14 @@
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#include <soc/rockchip/rk3399_grf.h>
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+#define RK3128_GRF_SOC_CON0 0x140
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+#define RK3128_GRF_OS_REG1 0x1cc
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+#define RK3128_GRF_DFI_WRNUM 0x220
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+#define RK3128_GRF_DFI_RDNUM 0x224
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+#define RK3128_GRF_DFI_TIMERVAL 0x22c
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+#define RK3128_DDR_MONITOR_EN ((1 << (16 + 6)) + (1 << 6))
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+#define RK3128_DDR_MONITOR_DISB ((1 << (16 + 6)) + (0 << 6))
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+
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#define RK3288_PMU_SYS_REG2 0x9c
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#define RK3288_GRF_SOC_CON4 0x254
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#define RK3288_GRF_SOC_STATUS(n) (0x280 + (n) * 4)
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@@ -83,6 +91,75 @@ struct rockchip_dfi {
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struct clk *clk;
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};
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+static void rk3128_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
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+{
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+ struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
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+
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+ regmap_write(info->regmap_grf,
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+ RK3128_GRF_SOC_CON0,
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+ RK3128_DDR_MONITOR_EN);
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+}
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+
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+static void rk3128_dfi_stop_hardware_counter(struct devfreq_event_dev *edev)
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+{
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+ struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
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+
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+ regmap_write(info->regmap_grf,
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+ RK3128_GRF_SOC_CON0,
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+ RK3128_DDR_MONITOR_DISB);
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+}
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+
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+static int rk3128_dfi_disable(struct devfreq_event_dev *edev)
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+{
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+ rk3128_dfi_stop_hardware_counter(edev);
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+
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+ return 0;
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+}
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+
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+static int rk3128_dfi_enable(struct devfreq_event_dev *edev)
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+{
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+ rk3128_dfi_start_hardware_counter(edev);
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+
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+ return 0;
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+}
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+
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+static int rk3128_dfi_set_event(struct devfreq_event_dev *edev)
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+{
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+ return 0;
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+}
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+
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+static int rk3128_dfi_get_event(struct devfreq_event_dev *edev,
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+ struct devfreq_event_data *edata)
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+{
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+ struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
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+ unsigned long flags;
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+ u32 dfi_wr, dfi_rd, dfi_timer;
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+
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+ local_irq_save(flags);
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+
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+ rk3128_dfi_stop_hardware_counter(edev);
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+
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+ regmap_read(info->regmap_grf, RK3128_GRF_DFI_WRNUM, &dfi_wr);
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+ regmap_read(info->regmap_grf, RK3128_GRF_DFI_RDNUM, &dfi_rd);
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+ regmap_read(info->regmap_grf, RK3128_GRF_DFI_TIMERVAL, &dfi_timer);
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+
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+ edata->load_count = (dfi_wr + dfi_rd) * 4;
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+ edata->total_count = dfi_timer;
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+
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+ rk3128_dfi_start_hardware_counter(edev);
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+
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+ local_irq_restore(flags);
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+
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+ return 0;
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+}
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+
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+static const struct devfreq_event_ops rk3128_dfi_ops = {
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+ .disable = rk3128_dfi_disable,
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+ .enable = rk3128_dfi_enable,
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+ .get_event = rk3128_dfi_get_event,
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+ .set_event = rk3128_dfi_set_event,
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+};
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+
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static void rk3288_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
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{
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struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
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@@ -350,6 +427,24 @@ static const struct devfreq_event_ops ro
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.set_event = rockchip_dfi_set_event,
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};
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+static __init int rk3128_dfi_init(struct platform_device *pdev,
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+ struct rockchip_dfi *data,
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+ struct devfreq_event_desc *desc)
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+{
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+ struct device_node *np = pdev->dev.of_node, *node;
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+
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+ node = of_parse_phandle(np, "rockchip,grf", 0);
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+ if (node) {
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+ data->regmap_grf = syscon_node_to_regmap(node);
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+ if (IS_ERR(data->regmap_grf))
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+ return PTR_ERR(data->regmap_grf);
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+ }
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+
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+ desc->ops = &rk3128_dfi_ops;
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+
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+ return 0;
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+}
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+
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static __init int rk3288_dfi_init(struct platform_device *pdev,
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struct rockchip_dfi *data,
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struct devfreq_event_desc *desc)
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@@ -436,6 +531,7 @@ static __init int rockchip_dfi_init(stru
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}
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static const struct of_device_id rockchip_dfi_id_match[] = {
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+ { .compatible = "rockchip,rk3128-dfi", .data = rk3128_dfi_init },
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{ .compatible = "rockchip,rk3288-dfi", .data = rk3288_dfi_init },
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{ .compatible = "rockchip,rk3368-dfi", .data = rk3368_dfi_init },
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{ .compatible = "rockchip,rk3399-dfi", .data = rockchip_dfi_init },
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