Hi,
On Wed, May 24, 2023 at 10:31:32AM +0200, Sascha Hauer wrote:
> 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@xxxxxxxxxxxxxx>
> ---
>
> Notes:
> Changes since v4:
> - use of_device_get_match_data()
> - use a callback rather than a struct type as driver data
>
> drivers/devfreq/event/rockchip-dfi.c | 48 +++++++++++++++++++---------
> 1 file changed, 33 insertions(+), 15 deletions(-)
>
Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
-- Sebastian
> diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
> index e19e5acaa362c..6b1ef29df7048 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,
> --
> 2.39.2
>
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