Hi Matthias,
On 7/12/19 23:47, matthias.bgg@xxxxxxxxxx wrote:
> From: Matthias Brugger <mbrugger@xxxxxxxx>
>
> Switch probing for the MMSYS to support invocation to a plain
> paltform device. The driver will be probed by the DRM subsystem.
>
> Signed-off-by: Matthias Brugger <mbrugger@xxxxxxxx>
> ---
> drivers/clk/mediatek/clk-mt2701-mm.c | 41 ++++++++++++++++++++--------
> 1 file changed, 29 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/clk/mediatek/clk-mt2701-mm.c b/drivers/clk/mediatek/clk-mt2701-mm.c
> index 054b597d4a73..4a9433c2b2b8 100644
> --- a/drivers/clk/mediatek/clk-mt2701-mm.c
> +++ b/drivers/clk/mediatek/clk-mt2701-mm.c
> @@ -4,14 +4,20 @@
> * Author: Shunli Wang <shunli.wang@xxxxxxxxxxxx>
> */
>
> +#include <linux/module.h>
> #include <linux/clk-provider.h>
> #include <linux/platform_device.h>
> +#include <linux/slab.h>
>
> #include "clk-mtk.h"
> #include "clk-gate.h"
>
> #include <dt-bindings/clock/mt2701-clk.h>
>
> +struct clk_mt2701_mm_priv {
> + struct clk_onecell_data *clk_data;
> +};
> +
> static const struct mtk_gate_regs disp0_cg_regs = {
> .set_ofs = 0x0104,
> .clr_ofs = 0x0108,
> @@ -79,23 +85,25 @@ static const struct mtk_gate mm_clks[] = {
> GATE_DISP1(CLK_MM_TVE_FMM, "mm_tve_fmm", "mm_sel", 14),
> };
>
> -static const struct of_device_id of_match_clk_mt2701_mm[] = {
> - { .compatible = "mediatek,mt2701-mmsys", },
> - {}
> -};
> -
> static int clk_mt2701_mm_probe(struct platform_device *pdev)
> {
> - struct clk_onecell_data *clk_data;
> int r;
> - struct device_node *node = pdev->dev.of_node;
> + struct device_node *node = pdev->dev.parent->of_node;
> + struct clk_mt2701_mm_priv *private;
> +
> + private = devm_kzalloc(&pdev->dev, sizeof(*private), GFP_KERNEL);
> + if (!private)
> + return -ENOMEM;
>
> - clk_data = mtk_alloc_clk_data(CLK_MM_NR);
> + private->clk_data = mtk_alloc_clk_data(CLK_MM_NR);
> +
> + platform_set_drvdata(pdev, private);
>
> mtk_clk_register_gates(node, mm_clks, ARRAY_SIZE(mm_clks),
> - clk_data);
> + private->clk_data);
>
> - r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> + r = of_clk_add_provider(node, of_clk_src_onecell_get,
> + private->clk_data);
> if (r)
> dev_err(&pdev->dev,
> "could not register clock provider: %s: %d\n",
> @@ -104,12 +112,21 @@ static int clk_mt2701_mm_probe(struct platform_device *pdev)
> return r;
> }
>
> +static int clk_mt2701_mm_remove(struct platform_device *pdev)
> +{
> + struct clk_mt2701_mm_priv *private = platform_get_drvdata(pdev);
> +
I think that private->clk_data->clks is also kallocated and need to be freed?
But I think that the best approach now is to switch to use devm allocations in
clk-mt2701-mm.c and this remove function will not be needed.
> + kfree(private->clk_data);
> +
> + return 0;
> +}
> +
> static struct platform_driver clk_mt2701_mm_drv = {
> .probe = clk_mt2701_mm_probe,
> + .remove = clk_mt2701_mm_remove,
> .driver = {
> .name = "clk-mt2701-mm",
> - .of_match_table = of_match_clk_mt2701_mm,
> },
> };
>
> -builtin_platform_driver(clk_mt2701_mm_drv);
> +module_platform_driver(clk_mt2701_mm_drv);
>
