@@ -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 +162,34 @@ 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;
+};
+
+struct rockchip_dfi_devtype_data {
+ int (*init)(struct rockchip_dfi *dfi);
+};
+
+static struct rockchip_dfi_devtype_data rk3399_devtype_data = {
+ .init = rk3399_dfi_init,
+};
+
static const struct of_device_id rockchip_dfi_id_match[] = {
- { .compatible = "rockchip,rk3399-dfi" },
+ { .compatible = "rockchip,rk3399-dfi", .data = &rk3399_devtype_data },
{ },
};
MODULE_DEVICE_TABLE(of, rockchip_dfi_id_match);
@@ -179,6 +200,15 @@ 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;
+ const struct of_device_id *of_id;
+ const struct rockchip_dfi_devtype_data *devtype;
+ int ret;
+
+ of_id = of_match_device(rockchip_dfi_id_match, &pdev->dev);
+ if (!of_id)
+ return -ENODEV;
+
+ devtype = of_id->data;
dfi = devm_kzalloc(dev, sizeof(*dfi), GFP_KERNEL);
if (!dfi)
@@ -188,11 +218,6 @@ 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");
@@ -208,6 +233,10 @@ static int rockchip_dfi_probe(struct platform_device *pdev)
desc->driver_data = dfi;
desc->name = np->name;
+ ret = devtype->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,
Move the RK3399 specifics to a SoC specific init function to make the way free for supporting other SoCs later. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> --- drivers/devfreq/event/rockchip-dfi.c | 59 +++++++++++++++++++++------- 1 file changed, 44 insertions(+), 15 deletions(-)