[PATCH 8/8] clk: ppc-corenet: Add support for the platform PLL

[Yuantian Tang]

Which platform are you trying to use this on? Can this be initialized by core pll function core_pll_init()?
I just saw most of this function is silimar to the core_pll_init().

Thanks,
Yuantian

> -----Original Message-----
> From: Emil Medve [mailto:Emilian.Medve at Freescale.com]
> Sent: Tuesday, January 20, 2015 6:10 PM
> To: linuxppc-dev at lists.ozlabs.org; Wood Scott-B07421; mturquette at linaro.org;
> haokexin at gmail.com; Tang Yuantian-B29983
> Cc: Medve Emilian-EMMEDVE1
> Subject: [PATCH 8/8] clk: ppc-corenet: Add support for the platform PLL
> 
> Change-Id: Iac11ed95f274485a86d2c11f32a3dc502bcd020f
> Signed-off-by: Emil Medve <Emilian.Medve at Freescale.com>
> ---
>  drivers/clk/clk-ppc-corenet.c | 85
> +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 85 insertions(+)
> 
> diff --git a/drivers/clk/clk-ppc-corenet.c b/drivers/clk/clk-ppc-corenet.c index
> 91816b1..ff425e1 100644
> --- a/drivers/clk/clk-ppc-corenet.c
> +++ b/drivers/clk/clk-ppc-corenet.c
> @@ -7,6 +7,9 @@
>   *
>   * clock driver for Freescale PowerPC corenet SoCs.
>   */
> +
> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> +
>  #include <linux/clk-provider.h>
>  #include <linux/io.h>
>  #include <linux/kernel.h>
> @@ -261,9 +264,91 @@ static void __init sysclk_init(struct device_node *node)
>  		of_clk_add_provider(np, of_clk_src_simple_get, clk);  }
> 
> +static void __init pltfrm_pll_init(struct device_node *np) {
> +	void __iomem *base;
> +	uint32_t mult;
> +	const char *parent_name, *clk_name;
> +	int i, _errno;
> +	struct clk_onecell_data *cod;
> +
> +	base = of_iomap(np, 0);
> +	if (!base) {
> +		pr_err("%s(): %s: of_iomap() failed\n", __func__, np->name);
> +		return;
> +	}
> +
> +	/* Get the multiple of PLL */
> +	mult = ioread32be(base);
> +
> +	iounmap(base);
> +
> +	/* Check if this PLL is disabled */
> +	if (mult & PLL_KILL) {
> +		pr_debug("%s(): %s: Disabled\n", __func__, np->name);
> +		return;
> +	}
> +	mult = (mult & GENMASK(6, 1)) >> 1;
> +
> +	parent_name = of_clk_get_parent_name(np, 0);
> +	if (!parent_name) {
> +		pr_err("%s(): %s: of_clk_get_parent_name() failed\n",
> +		       __func__, np->name);
> +		return;
> +	}
> +
> +	i = of_property_count_strings(np, "clock-output-names");
> +	if (i < 0) {
> +		pr_err("%s(): %s: of_property_count_strings(clock-output-names)
> = %d\n",
> +		       __func__, np->name, i);
> +		return;
> +	}
> +
> +	cod = kmalloc(sizeof(*cod) + i * sizeof(struct clk *), GFP_KERNEL);
> +	if (!cod)
> +		return;
> +	cod->clks = (struct clk **)(cod + 1);
> +	cod->clk_num = i;
> +
> +	for (i = 0; i < cod->clk_num; i++) {
> +		_errno = of_property_read_string_index(np, "clock-output-names",
> +						       i, &clk_name);
> +		if (_errno < 0) {
> +			pr_err("%s(): %s:
> of_property_read_string_index(clock-output-names) = %d\n",
> +			       __func__, np->name, _errno);
> +			goto return_clk_unregister;
> +		}
> +
> +		cod->clks[i] = clk_register_fixed_factor(NULL, clk_name,
> +					       parent_name, 0, mult, 1 + i);
> +		if (IS_ERR(cod->clks[i])) {
> +			pr_err("%s(): %s: clk_register_fixed_factor(%s) = %ld\n",
> +			       __func__, np->name,
> +			       clk_name, PTR_ERR(cod->clks[i]));
> +			goto return_clk_unregister;
> +		}
> +	}
> +
> +	_errno = of_clk_add_provider(np, of_clk_src_onecell_get, cod);
> +	if (_errno < 0) {
> +		pr_err("%s(): %s: of_clk_add_provider() = %d\n",
> +		       __func__, np->name, _errno);
> +		goto return_clk_unregister;
> +	}
> +
> +	return;
> +
> +return_clk_unregister:
> +	while (--i >= 0)
> +		clk_unregister(cod->clks[i]);
> +	kfree(cod);
> +}
> +
>  CLK_OF_DECLARE(qoriq_sysclk_1, "fsl,qoriq-sysclk-1.0", sysclk_init);
> CLK_OF_DECLARE(qoriq_sysclk_2, "fsl,qoriq-sysclk-2.0", sysclk_init);
> CLK_OF_DECLARE(qoriq_core_pll_1, "fsl,qoriq-core-pll-1.0", core_pll_init);
> CLK_OF_DECLARE(qoriq_core_pll_2, "fsl,qoriq-core-pll-2.0", core_pll_init);
> CLK_OF_DECLARE(qoriq_core_mux_1, "fsl,qoriq-core-mux-1.0", core_mux_init);
> CLK_OF_DECLARE(qoriq_core_mux_2, "fsl,qoriq-core-mux-2.0", core_mux_init);
> +CLK_OF_DECLARE(qoriq_pltfrm_pll_1, "fsl,qoriq-platform-pll-1.0",
> +pltfrm_pll_init); CLK_OF_DECLARE(qoriq_pltfrm_pll_2,
> +"fsl,qoriq-platform-pll-2.0", pltfrm_pll_init);
> --
> 2.2.2