mirror of https://github.com/OpenIPC/firmware.git
112 lines
2.6 KiB
Diff
112 lines
2.6 KiB
Diff
diff -drupN a/drivers/clk/sunxi/clk-sun6i-ar100.c b/drivers/clk/sunxi/clk-sun6i-ar100.c
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--- a/drivers/clk/sunxi/clk-sun6i-ar100.c 2018-08-06 17:23:04.000000000 +0300
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+++ b/drivers/clk/sunxi/clk-sun6i-ar100.c 1970-01-01 03:00:00.000000000 +0300
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@@ -1,107 +0,0 @@
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-/*
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- * Copyright (C) 2014 Free Electrons
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- *
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- * License Terms: GNU General Public License v2
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- * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
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- *
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- * Allwinner A31 AR100 clock driver
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- *
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- */
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-
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-#include <linux/bitops.h>
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-#include <linux/clk-provider.h>
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-#include <linux/init.h>
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-#include <linux/of.h>
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-#include <linux/platform_device.h>
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-#include <linux/spinlock.h>
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-
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-#include "clk-factors.h"
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-
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-/**
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- * sun6i_get_ar100_factors - Calculates factors p, m for AR100
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- *
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- * AR100 rate is calculated as follows
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- * rate = (parent_rate >> p) / (m + 1);
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- */
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-static void sun6i_get_ar100_factors(struct factors_request *req)
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-{
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- unsigned long div;
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- int shift;
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-
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- /* clock only divides */
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- if (req->rate > req->parent_rate)
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- req->rate = req->parent_rate;
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-
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- div = DIV_ROUND_UP(req->parent_rate, req->rate);
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-
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- if (div < 32)
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- shift = 0;
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- else if (div >> 1 < 32)
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- shift = 1;
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- else if (div >> 2 < 32)
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- shift = 2;
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- else
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- shift = 3;
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-
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- div >>= shift;
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-
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- if (div > 32)
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- div = 32;
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-
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- req->rate = (req->parent_rate >> shift) / div;
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- req->m = div - 1;
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- req->p = shift;
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-}
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-
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-static const struct clk_factors_config sun6i_ar100_config = {
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- .mwidth = 5,
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- .mshift = 8,
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- .pwidth = 2,
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- .pshift = 4,
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-};
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-
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-static const struct factors_data sun6i_ar100_data = {
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- .mux = 16,
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- .muxmask = GENMASK(1, 0),
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- .table = &sun6i_ar100_config,
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- .getter = sun6i_get_ar100_factors,
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-};
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-
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-static DEFINE_SPINLOCK(sun6i_ar100_lock);
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-
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-static int sun6i_a31_ar100_clk_probe(struct platform_device *pdev)
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-{
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- struct device_node *np = pdev->dev.of_node;
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- struct resource *r;
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- void __iomem *reg;
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- struct clk *clk;
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-
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- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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- reg = devm_ioremap_resource(&pdev->dev, r);
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- if (IS_ERR(reg))
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- return PTR_ERR(reg);
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-
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- clk = sunxi_factors_register(np, &sun6i_ar100_data, &sun6i_ar100_lock,
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- reg);
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- if (!clk)
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- return -ENOMEM;
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-
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- platform_set_drvdata(pdev, clk);
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-
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- return 0;
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-}
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-
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-static const struct of_device_id sun6i_a31_ar100_clk_dt_ids[] = {
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- { .compatible = "allwinner,sun6i-a31-ar100-clk" },
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- { /* sentinel */ }
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-};
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-
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-static struct platform_driver sun6i_a31_ar100_clk_driver = {
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- .driver = {
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- .name = "sun6i-a31-ar100-clk",
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- .of_match_table = sun6i_a31_ar100_clk_dt_ids,
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- .suppress_bind_attrs = true,
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- },
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- .probe = sun6i_a31_ar100_clk_probe,
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-};
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-builtin_platform_driver(sun6i_a31_ar100_clk_driver);
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