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Release 4.11 drivers/clk/versatile/clk-sp810.c

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Copyright (C) 2013 ARM Limited
 */

#include <linux/amba/sp810.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_address.h>


#define to_clk_sp810_timerclken(_hw) \
		container_of(_hw, struct clk_sp810_timerclken, hw)

struct clk_sp810;


struct clk_sp810_timerclken {
	
struct clk_hw hw;
	
struct clk *clk;
	
struct clk_sp810 *sp810;
	
int channel;
};


struct clk_sp810 {
	
struct device_node *node;
	
void __iomem *base;
	
spinlock_t lock;
	
struct clk_sp810_timerclken timerclken[4];
};


static u8 clk_sp810_timerclken_get_parent(struct clk_hw *hw) { struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw); u32 val = readl(timerclken->sp810->base + SCCTRL); return !!(val & (1 << SCCTRL_TIMERENnSEL_SHIFT(timerclken->channel))); }

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Pawel Moll53100.00%1100.00%
Total53100.00%1100.00%


static int clk_sp810_timerclken_set_parent(struct clk_hw *hw, u8 index) { struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw); struct clk_sp810 *sp810 = timerclken->sp810; u32 val, shift = SCCTRL_TIMERENnSEL_SHIFT(timerclken->channel); unsigned long flags = 0; if (WARN_ON(index > 1)) return -EINVAL; spin_lock_irqsave(&sp810->lock, flags); val = readl(sp810->base + SCCTRL); val &= ~(1 << shift); val |= index << shift; writel(val, sp810->base + SCCTRL); spin_unlock_irqrestore(&sp810->lock, flags); return 0; }

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Pawel Moll124100.00%1100.00%
Total124100.00%1100.00%

static const struct clk_ops clk_sp810_timerclken_ops = { .get_parent = clk_sp810_timerclken_get_parent, .set_parent = clk_sp810_timerclken_set_parent, };
static struct clk *clk_sp810_timerclken_of_get(struct of_phandle_args *clkspec, void *data) { struct clk_sp810 *sp810 = data; if (WARN_ON(clkspec->args_count != 1 || clkspec->args[0] >= ARRAY_SIZE(sp810->timerclken))) return NULL; return sp810->timerclken[clkspec->args[0]].clk; }

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Pawel Moll6597.01%133.33%
Dan Carpenter11.49%133.33%
Sachin Kamat11.49%133.33%
Total67100.00%3100.00%


static void __init clk_sp810_of_setup(struct device_node *node) { struct clk_sp810 *sp810 = kzalloc(sizeof(*sp810), GFP_KERNEL); const char *parent_names[2]; int num = ARRAY_SIZE(parent_names); char name[12]; struct clk_init_data init; static int instance; int i; bool deprecated; if (!sp810) return; if (of_clk_parent_fill(node, parent_names, num) != num) { pr_warn("Failed to obtain parent clocks for SP810!\n"); kfree(sp810); return; } sp810->node = node; sp810->base = of_iomap(node, 0); spin_lock_init(&sp810->lock); init.name = name; init.ops = &clk_sp810_timerclken_ops; init.flags = CLK_IS_BASIC; init.parent_names = parent_names; init.num_parents = num; deprecated = !of_find_property(node, "assigned-clock-parents", NULL); for (i = 0; i < ARRAY_SIZE(sp810->timerclken); i++) { snprintf(name, sizeof(name), "sp810_%d_%d", instance, i); sp810->timerclken[i].sp810 = sp810; sp810->timerclken[i].channel = i; sp810->timerclken[i].hw.init = &init; /* * If DT isn't setting the parent, force it to be * the 1 MHz clock without going through the framework. * We do this before clk_register() so that it can determine * the parent and setup the tree properly. */ if (deprecated) init.ops->set_parent(&sp810->timerclken[i].hw, 1); sp810->timerclken[i].clk = clk_register(NULL, &sp810->timerclken[i].hw); WARN_ON(IS_ERR(sp810->timerclken[i].clk)); } of_clk_add_provider(node, clk_sp810_timerclken_of_get, sp810); instance++; }

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PersonTokensPropCommitsCommitProp
Pawel Moll24277.81%120.00%
Stephen Boyd5317.04%240.00%
Linus Walleij113.54%120.00%
Sudip Mukherjee51.61%120.00%
Total311100.00%5100.00%

CLK_OF_DECLARE(sp810, "arm,sp810", clk_sp810_of_setup);

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PersonTokensPropCommitsCommitProp
Pawel Moll58788.67%112.50%
Stephen Boyd578.61%337.50%
Linus Walleij111.66%112.50%
Sudip Mukherjee50.76%112.50%
Sachin Kamat10.15%112.50%
Dan Carpenter10.15%112.50%
Total662100.00%8100.00%
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