1 // SPDX-License-Identifier: GPL-2.0-only
5  * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
11 #include <linux/clk-provider.h>
17 #include "clk-factors.h"
20  * sun6i_get_ar100_factors - Calculates factors p, m for AR100
27 	unsigned long div;  in sun6i_get_ar100_factors()  local
31 	if (req->rate > req->parent_rate)  in sun6i_get_ar100_factors()
32 		req->rate = req->parent_rate;  in sun6i_get_ar100_factors()
34 	div = DIV_ROUND_UP(req->parent_rate, req->rate);  in sun6i_get_ar100_factors()
36 	if (div < 32)  in sun6i_get_ar100_factors()
38 	else if (div >> 1 < 32)  in sun6i_get_ar100_factors()
40 	else if (div >> 2 < 32)  in sun6i_get_ar100_factors()
45 	div >>= shift;  in sun6i_get_ar100_factors()
47 	if (div > 32)  in sun6i_get_ar100_factors()
48 		div = 32;  in sun6i_get_ar100_factors()
50 	req->rate = (req->parent_rate >> shift) / div;  in sun6i_get_ar100_factors()
51 	req->m = div - 1;  in sun6i_get_ar100_factors()
52 	req->p = shift;  in sun6i_get_ar100_factors()
73 	struct device_node *np = pdev->dev.of_node;  in sun6i_a31_ar100_clk_probe()
76 	struct clk *clk;  in sun6i_a31_ar100_clk_probe()  local
79 	reg = devm_ioremap_resource(&pdev->dev, r);  in sun6i_a31_ar100_clk_probe()
83 	clk = sunxi_factors_register(np, &sun6i_ar100_data, &sun6i_ar100_lock,  in sun6i_a31_ar100_clk_probe()
85 	if (!clk)  in sun6i_a31_ar100_clk_probe()
86 		return -ENOMEM;  in sun6i_a31_ar100_clk_probe()
88 	platform_set_drvdata(pdev, clk);  in sun6i_a31_ar100_clk_probe()
94 	{ .compatible = "allwinner,sun6i-a31-ar100-clk" },
100 		.name = "sun6i-a31-ar100-clk",