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authorSascha Hauer <s.hauer@pengutronix.de>2023-07-04 12:32:20 +0300
committerChanwoo Choi <cw00.choi@samsung.com>2023-10-09 01:28:50 +0300
commit559dc2876c0c46850dfed5c2a810d17b259e4bd9 (patch)
tree8964dbd5dbb7941495ddac631e1f7cb39490e5b1 /drivers/devfreq
parent9325b3ec923ee42799879cb4d4c5aaffa49e7829 (diff)
downloadlinux-559dc2876c0c46850dfed5c2a810d17b259e4bd9.tar.xz
PM / devfreq: rockchip-dfi: Add SoC specific init function
Move the RK3399 specifics to a SoC specific init function to make the way free for supporting other SoCs later. Link: https://lore.kernel.org/lkml/20230704093242.583575-5-s.hauer@pengutronix.de/ Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/devfreq')
-rw-r--r--drivers/devfreq/event/rockchip-dfi.c48
1 files changed, 33 insertions, 15 deletions
diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index e19e5acaa362..6b1ef29df704 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -17,6 +17,7 @@
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <soc/rockchip/rk3399_grf.h>
@@ -55,27 +56,21 @@ struct rockchip_dfi {
void __iomem *regs;
struct regmap *regmap_pmu;
struct clk *clk;
+ u32 ddr_type;
};
static void rockchip_dfi_start_hardware_counter(struct devfreq_event_dev *edev)
{
struct rockchip_dfi *dfi = devfreq_event_get_drvdata(edev);
void __iomem *dfi_regs = dfi->regs;
- u32 val;
- u32 ddr_type;
-
- /* get ddr type */
- regmap_read(dfi->regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
- ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
- RK3399_PMUGRF_DDRTYPE_MASK;
/* clear DDRMON_CTRL setting */
writel_relaxed(CLR_DDRMON_CTRL, dfi_regs + DDRMON_CTRL);
/* set ddr type to dfi */
- if (ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR3)
+ if (dfi->ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR3)
writel_relaxed(LPDDR3_EN, dfi_regs + DDRMON_CTRL);
- else if (ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR4)
+ else if (dfi->ddr_type == RK3399_PMUGRF_DDRTYPE_LPDDR4)
writel_relaxed(LPDDR4_EN, dfi_regs + DDRMON_CTRL);
/* enable count, use software mode */
@@ -167,8 +162,26 @@ static const struct devfreq_event_ops rockchip_dfi_ops = {
.set_event = rockchip_dfi_set_event,
};
+static int rk3399_dfi_init(struct rockchip_dfi *dfi)
+{
+ struct regmap *regmap_pmu = dfi->regmap_pmu;
+ u32 val;
+
+ dfi->clk = devm_clk_get(dfi->dev, "pclk_ddr_mon");
+ if (IS_ERR(dfi->clk))
+ return dev_err_probe(dfi->dev, PTR_ERR(dfi->clk),
+ "Cannot get the clk pclk_ddr_mon\n");
+
+ /* get ddr type */
+ regmap_read(regmap_pmu, RK3399_PMUGRF_OS_REG2, &val);
+ dfi->ddr_type = (val >> RK3399_PMUGRF_DDRTYPE_SHIFT) &
+ RK3399_PMUGRF_DDRTYPE_MASK;
+
+ return 0;
+};
+
static const struct of_device_id rockchip_dfi_id_match[] = {
- { .compatible = "rockchip,rk3399-dfi" },
+ { .compatible = "rockchip,rk3399-dfi", .data = rk3399_dfi_init },
{ },
};
MODULE_DEVICE_TABLE(of, rockchip_dfi_id_match);
@@ -179,6 +192,12 @@ static int rockchip_dfi_probe(struct platform_device *pdev)
struct rockchip_dfi *dfi;
struct devfreq_event_desc *desc;
struct device_node *np = pdev->dev.of_node, *node;
+ int (*soc_init)(struct rockchip_dfi *dfi);
+ int ret;
+
+ soc_init = of_device_get_match_data(&pdev->dev);
+ if (!soc_init)
+ return -EINVAL;
dfi = devm_kzalloc(dev, sizeof(*dfi), GFP_KERNEL);
if (!dfi)
@@ -188,11 +207,6 @@ static int rockchip_dfi_probe(struct platform_device *pdev)
if (IS_ERR(dfi->regs))
return PTR_ERR(dfi->regs);
- dfi->clk = devm_clk_get(dev, "pclk_ddr_mon");
- if (IS_ERR(dfi->clk))
- return dev_err_probe(dev, PTR_ERR(dfi->clk),
- "Cannot get the clk pclk_ddr_mon\n");
-
node = of_parse_phandle(np, "rockchip,pmu", 0);
if (!node)
return dev_err_probe(&pdev->dev, -ENODEV, "Can't find pmu_grf registers\n");
@@ -209,6 +223,10 @@ static int rockchip_dfi_probe(struct platform_device *pdev)
desc->driver_data = dfi;
desc->name = np->name;
+ ret = soc_init(dfi);
+ if (ret)
+ return ret;
+
dfi->edev = devm_devfreq_event_add_edev(&pdev->dev, desc);
if (IS_ERR(dfi->edev)) {
dev_err(&pdev->dev,