[PATCH] clk: imx8mm: Switch to platform driver

[PATCH] clk: imx8mm: Switch to platform driver

[Abel Vesa]

In order to make the clock provider a platform driver
all the data and code needs to be outside of .init section.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
---
 drivers/clk/imx/clk-imx8mm.c | 52 +++++++++++++++++++++++++++++---------------
 1 file changed, 34 insertions(+), 18 deletions(-)

diff --git a/drivers/clk/imx/clk-imx8mm.c b/drivers/clk/imx/clk-imx8mm.c
index 6b8e75d..f2516c5 100644
--- a/drivers/clk/imx/clk-imx8mm.c
+++ b/drivers/clk/imx/clk-imx8mm.c
@@ -68,43 +68,43 @@ static const struct imx_pll14xx_rate_table imx8mm_drampll_tbl[] = {
 	PLL_1443X_RATE(650000000U, 325, 3, 2, 0),
 };
 
-static struct imx_pll14xx_clk imx8mm_audio_pll __initdata = {
+static struct imx_pll14xx_clk imx8mm_audio_pll = {
 		.type = PLL_1443X,
 		.rate_table = imx8mm_audiopll_tbl,
 		.rate_count = ARRAY_SIZE(imx8mm_audiopll_tbl),
 };
 
-static struct imx_pll14xx_clk imx8mm_video_pll __initdata = {
+static struct imx_pll14xx_clk imx8mm_video_pll = {
 		.type = PLL_1443X,
 		.rate_table = imx8mm_videopll_tbl,
 		.rate_count = ARRAY_SIZE(imx8mm_videopll_tbl),
 };
 
-static struct imx_pll14xx_clk imx8mm_dram_pll __initdata = {
+static struct imx_pll14xx_clk imx8mm_dram_pll = {
 		.type = PLL_1443X,
 		.rate_table = imx8mm_drampll_tbl,
 		.rate_count = ARRAY_SIZE(imx8mm_drampll_tbl),
 };
 
-static struct imx_pll14xx_clk imx8mm_arm_pll __initdata = {
+static struct imx_pll14xx_clk imx8mm_arm_pll = {
 		.type = PLL_1416X,
 		.rate_table = imx8mm_pll1416x_tbl,
 		.rate_count = ARRAY_SIZE(imx8mm_pll1416x_tbl),
 };
 
-static struct imx_pll14xx_clk imx8mm_gpu_pll __initdata = {
+static struct imx_pll14xx_clk imx8mm_gpu_pll = {
 		.type = PLL_1416X,
 		.rate_table = imx8mm_pll1416x_tbl,
 		.rate_count = ARRAY_SIZE(imx8mm_pll1416x_tbl),
 };
 
-static struct imx_pll14xx_clk imx8mm_vpu_pll __initdata = {
+static struct imx_pll14xx_clk imx8mm_vpu_pll = {
 		.type = PLL_1416X,
 		.rate_table = imx8mm_pll1416x_tbl,
 		.rate_count = ARRAY_SIZE(imx8mm_pll1416x_tbl),
 };
 
-static struct imx_pll14xx_clk imx8mm_sys_pll __initdata = {
+static struct imx_pll14xx_clk imx8mm_sys_pll = {
 		.type = PLL_1416X,
 		.rate_table = imx8mm_pll1416x_tbl,
 		.rate_count = ARRAY_SIZE(imx8mm_pll1416x_tbl),
@@ -374,7 +374,7 @@ static const char *imx8mm_clko1_sels[] = {"osc_24m", "sys_pll1_800m", "osc_27m",
 static struct clk *clks[IMX8MM_CLK_END];
 static struct clk_onecell_data clk_data;
 
-static struct clk ** const uart_clks[] __initconst = {
+static struct clk ** const uart_clks[] = {
 	&clks[IMX8MM_CLK_UART1_ROOT],
 	&clks[IMX8MM_CLK_UART2_ROOT],
 	&clks[IMX8MM_CLK_UART3_ROOT],
@@ -382,19 +382,20 @@ static struct clk ** const uart_clks[] __initconst = {
 	NULL
 };
 
-static int __init imx8mm_clocks_init(struct device_node *ccm_node)
+static int imx8mm_clocks_probe(struct platform_device *pdev)
 {
-	struct device_node *np;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
 	void __iomem *base;
 	int ret;
 
 	clks[IMX8MM_CLK_DUMMY] = imx_clk_fixed("dummy", 0);
-	clks[IMX8MM_CLK_24M] = of_clk_get_by_name(ccm_node, "osc_24m");
-	clks[IMX8MM_CLK_32K] = of_clk_get_by_name(ccm_node, "osc_32k");
-	clks[IMX8MM_CLK_EXT1] = of_clk_get_by_name(ccm_node, "clk_ext1");
-	clks[IMX8MM_CLK_EXT2] = of_clk_get_by_name(ccm_node, "clk_ext2");
-	clks[IMX8MM_CLK_EXT3] = of_clk_get_by_name(ccm_node, "clk_ext3");
-	clks[IMX8MM_CLK_EXT4] = of_clk_get_by_name(ccm_node, "clk_ext4");
+	clks[IMX8MM_CLK_24M] = of_clk_get_by_name(np, "osc_24m");
+	clks[IMX8MM_CLK_32K] = of_clk_get_by_name(np, "osc_32k");
+	clks[IMX8MM_CLK_EXT1] = of_clk_get_by_name(np, "clk_ext1");
+	clks[IMX8MM_CLK_EXT2] = of_clk_get_by_name(np, "clk_ext2");
+	clks[IMX8MM_CLK_EXT3] = of_clk_get_by_name(np, "clk_ext3");
+	clks[IMX8MM_CLK_EXT4] = of_clk_get_by_name(np, "clk_ext4");
 
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx8mm-anatop");
 	base = of_iomap(np, 0);
@@ -480,7 +481,7 @@ static int __init imx8mm_clocks_init(struct device_node *ccm_node)
 	clks[IMX8MM_SYS_PLL2_500M] = imx_clk_fixed_factor("sys_pll2_500m", "sys_pll2_out", 1, 2);
 	clks[IMX8MM_SYS_PLL2_1000M] = imx_clk_fixed_factor("sys_pll2_1000m", "sys_pll2_out", 1, 1);
 
-	np = ccm_node;
+	np = dev->of_node;
 	base = of_iomap(np, 0);
 	if (WARN_ON(!base))
 		return -ENOMEM;
@@ -682,4 +683,19 @@ static int __init imx8mm_clocks_init(struct device_node *ccm_node)
 
 	return 0;
 }
-CLK_OF_DECLARE_DRIVER(imx8mm, "fsl,imx8mm-ccm", imx8mm_clocks_init);
+
+static const struct of_device_id imx8mm_clk_of_match[] = {
+	{ .compatible = "fsl,imx8mm-ccm" },
+	{ /* Sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, imx8mm_clk_of_match);
+
+
+static struct platform_driver imx8mm_clk_driver = {
+	.probe = imx8mm_clocks_probe,
+	.driver = {
+		.name = "imx8mm-ccm",
+		.of_match_table = of_match_ptr(imx8mm_clk_of_match),
+	},
+};
+module_platform_driver(imx8mm_clk_driver);
-- 
2.7.4

Re: [PATCH] clk: imx8mm: Switch to platform driver

[kbuild test robot]

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Hi Abel,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on shawnguo/for-next]
[also build test WARNING on v5.2-rc6 next-20190621]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Abel-Vesa/clk-imx8mm-Switch-to-platform-driver/20190625-095013
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git for-next
config: arm64-defconfig (attached as .config)
compiler: clang version 9.0.0 (git://gitmirror/llvm_project 868a394bb60dbeb1dc92578c34207265a7b528f6)
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> WARNING: vmlinux.o(.text+0x515c60): Section mismatch in reference from the function imx8mm_clocks_probe() to the function .init.text:imx_register_uart_clocks()
   The function imx8mm_clocks_probe() references
   the function __init imx_register_uart_clocks().
   This is often because imx8mm_clocks_probe lacks a __init
   annotation or the annotation of imx_register_uart_clocks is wrong.

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
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Re: [PATCH] clk: imx8mm: Switch to platform driver

[Stephen Boyd]

Quoting Abel Vesa (2019-06-24 03:54:32)
> In order to make the clock provider a platform driver
> all the data and code needs to be outside of .init section.

Yes, but why are you making this change in general?

> 
> Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
[...]
> @@ -480,7 +481,7 @@ static int __init imx8mm_clocks_init(struct device_node *ccm_node)
>         clks[IMX8MM_SYS_PLL2_500M] = imx_clk_fixed_factor("sys_pll2_500m", "sys_pll2_out", 1, 2);
>         clks[IMX8MM_SYS_PLL2_1000M] = imx_clk_fixed_factor("sys_pll2_1000m", "sys_pll2_out", 1, 1);
>  
> -       np = ccm_node;
> +       np = dev->of_node;
>         base = of_iomap(np, 0);

If we're using platform device here it would be nice to also use
platform device APIs to map memory and request resources, etc.

>         if (WARN_ON(!base))
>                 return -ENOMEM;
> @@ -682,4 +683,19 @@ static int __init imx8mm_clocks_init(struct device_node *ccm_node)
>  
>         return 0;
>  }
> -CLK_OF_DECLARE_DRIVER(imx8mm, "fsl,imx8mm-ccm", imx8mm_clocks_init);
> +
> +static const struct of_device_id imx8mm_clk_of_match[] = {
> +       { .compatible = "fsl,imx8mm-ccm" },
> +       { /* Sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, imx8mm_clk_of_match);
> +
> +

Nitpick: Drop the second newline.

> +static struct platform_driver imx8mm_clk_driver = {
> +       .probe = imx8mm_clocks_probe,
> +       .driver = {
> +               .name = "imx8mm-ccm",
> +               .of_match_table = of_match_ptr(imx8mm_clk_of_match),
> +       },
> +};
> +module_platform_driver(imx8mm_clk_driver);