Linux-libre 4.6.2-gnu

1 files changed, 0 insertions, 329 deletions

diff --git a/drivers/clk/shmobile/clk-mstp.c b/drivers/clk/shmobile/clk-mstp.c
deleted file mode 100644
index 3b09716eb..000000000
--- a/drivers/clk/shmobile/clk-mstp.c
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- * R-Car MSTP clocks
- *
- * Copyright (C) 2013 Ideas On Board SPRL
- * Copyright (C) 2015 Glider bvba
- *
- * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- */
-
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
-#include <linux/clkdev.h>
-#include <linux/clk/shmobile.h>
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/pm_clock.h>
-#include <linux/pm_domain.h>
-#include <linux/spinlock.h>
-
-/*
- * MSTP clocks. We can't use standard gate clocks as we need to poll on the
- * status register when enabling the clock.
- */
-
-#define MSTP_MAX_CLOCKS		32
-
-/**
- * struct mstp_clock_group - MSTP gating clocks group
- *
- * @data: clocks in this group
- * @smstpcr: module stop control register
- * @mstpsr: module stop status register (optional)
- * @lock: protects writes to SMSTPCR
- */
-struct mstp_clock_group {
-	struct clk_onecell_data data;
-	void __iomem *smstpcr;
-	void __iomem *mstpsr;
-	spinlock_t lock;
-};
-
-/**
- * struct mstp_clock - MSTP gating clock
- * @hw: handle between common and hardware-specific interfaces
- * @bit_index: control bit index
- * @group: MSTP clocks group
- */
-struct mstp_clock {
-	struct clk_hw hw;
-	u32 bit_index;
-	struct mstp_clock_group *group;
-};
-
-#define to_mstp_clock(_hw) container_of(_hw, struct mstp_clock, hw)
-
-static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable)
-{
-	struct mstp_clock *clock = to_mstp_clock(hw);
-	struct mstp_clock_group *group = clock->group;
-	u32 bitmask = BIT(clock->bit_index);
-	unsigned long flags;
-	unsigned int i;
-	u32 value;
-
-	spin_lock_irqsave(&group->lock, flags);
-
-	value = clk_readl(group->smstpcr);
-	if (enable)
-		value &= ~bitmask;
-	else
-		value |= bitmask;
-	clk_writel(value, group->smstpcr);
-
-	spin_unlock_irqrestore(&group->lock, flags);
-
-	if (!enable || !group->mstpsr)
-		return 0;
-
-	for (i = 1000; i > 0; --i) {
-		if (!(clk_readl(group->mstpsr) & bitmask))
-			break;
-		cpu_relax();
-	}
-
-	if (!i) {
-		pr_err("%s: failed to enable %p[%d]\n", __func__,
-		       group->smstpcr, clock->bit_index);
-		return -ETIMEDOUT;
-	}
-
-	return 0;
-}
-
-static int cpg_mstp_clock_enable(struct clk_hw *hw)
-{
-	return cpg_mstp_clock_endisable(hw, true);
-}
-
-static void cpg_mstp_clock_disable(struct clk_hw *hw)
-{
-	cpg_mstp_clock_endisable(hw, false);
-}
-
-static int cpg_mstp_clock_is_enabled(struct clk_hw *hw)
-{
-	struct mstp_clock *clock = to_mstp_clock(hw);
-	struct mstp_clock_group *group = clock->group;
-	u32 value;
-
-	if (group->mstpsr)
-		value = clk_readl(group->mstpsr);
-	else
-		value = clk_readl(group->smstpcr);
-
-	return !(value & BIT(clock->bit_index));
-}
-
-static const struct clk_ops cpg_mstp_clock_ops = {
-	.enable = cpg_mstp_clock_enable,
-	.disable = cpg_mstp_clock_disable,
-	.is_enabled = cpg_mstp_clock_is_enabled,
-};
-
-static struct clk * __init
-cpg_mstp_clock_register(const char *name, const char *parent_name,
-			unsigned int index, struct mstp_clock_group *group)
-{
-	struct clk_init_data init;
-	struct mstp_clock *clock;
-	struct clk *clk;
-
-	clock = kzalloc(sizeof(*clock), GFP_KERNEL);
-	if (!clock) {
-		pr_err("%s: failed to allocate MSTP clock.\n", __func__);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	init.name = name;
-	init.ops = &cpg_mstp_clock_ops;
-	init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
-	init.parent_names = &parent_name;
-	init.num_parents = 1;
-
-	clock->bit_index = index;
-	clock->group = group;
-	clock->hw.init = &init;
-
-	clk = clk_register(NULL, &clock->hw);
-
-	if (IS_ERR(clk))
-		kfree(clock);
-
-	return clk;
-}
-
-static void __init cpg_mstp_clocks_init(struct device_node *np)
-{
-	struct mstp_clock_group *group;
-	const char *idxname;
-	struct clk **clks;
-	unsigned int i;
-
-	group = kzalloc(sizeof(*group), GFP_KERNEL);
-	clks = kmalloc(MSTP_MAX_CLOCKS * sizeof(*clks), GFP_KERNEL);
-	if (group == NULL || clks == NULL) {
-		kfree(group);
-		kfree(clks);
-		pr_err("%s: failed to allocate group\n", __func__);
-		return;
-	}
-
-	spin_lock_init(&group->lock);
-	group->data.clks = clks;
-
-	group->smstpcr = of_iomap(np, 0);
-	group->mstpsr = of_iomap(np, 1);
-
-	if (group->smstpcr == NULL) {
-		pr_err("%s: failed to remap SMSTPCR\n", __func__);
-		kfree(group);
-		kfree(clks);
-		return;
-	}
-
-	for (i = 0; i < MSTP_MAX_CLOCKS; ++i)
-		clks[i] = ERR_PTR(-ENOENT);
-
-	if (of_find_property(np, "clock-indices", &i))
-		idxname = "clock-indices";
-	else
-		idxname = "renesas,clock-indices";
-
-	for (i = 0; i < MSTP_MAX_CLOCKS; ++i) {
-		const char *parent_name;
-		const char *name;
-		u32 clkidx;
-		int ret;
-
-		/* Skip clocks with no name. */
-		ret = of_property_read_string_index(np, "clock-output-names",
-						    i, &name);
-		if (ret < 0 || strlen(name) == 0)
-			continue;
-
-		parent_name = of_clk_get_parent_name(np, i);
-		ret = of_property_read_u32_index(np, idxname, i, &clkidx);
-		if (parent_name == NULL || ret < 0)
-			break;
-
-		if (clkidx >= MSTP_MAX_CLOCKS) {
-			pr_err("%s: invalid clock %s %s index %u\n",
-			       __func__, np->name, name, clkidx);
-			continue;
-		}
-
-		clks[clkidx] = cpg_mstp_clock_register(name, parent_name,
-						       clkidx, group);
-		if (!IS_ERR(clks[clkidx])) {
-			group->data.clk_num = max(group->data.clk_num,
-						  clkidx + 1);
-			/*
-			 * Register a clkdev to let board code retrieve the
-			 * clock by name and register aliases for non-DT
-			 * devices.
-			 *
-			 * FIXME: Remove this when all devices that require a
-			 * clock will be instantiated from DT.
-			 */
-			clk_register_clkdev(clks[clkidx], name, NULL);
-		} else {
-			pr_err("%s: failed to register %s %s clock (%ld)\n",
-			       __func__, np->name, name, PTR_ERR(clks[clkidx]));
-		}
-	}
-
-	of_clk_add_provider(np, of_clk_src_onecell_get, &group->data);
-}
-CLK_OF_DECLARE(cpg_mstp_clks, "renesas,cpg-mstp-clocks", cpg_mstp_clocks_init);
-
-
-#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
-int cpg_mstp_attach_dev(struct generic_pm_domain *domain, struct device *dev)
-{
-	struct device_node *np = dev->of_node;
-	struct of_phandle_args clkspec;
-	struct clk *clk;
-	int i = 0;
-	int error;
-
-	while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i,
-					   &clkspec)) {
-		if (of_device_is_compatible(clkspec.np,
-					    "renesas,cpg-mstp-clocks"))
-			goto found;
-
-		/* BSC on r8a73a4/sh73a0 uses zb_clk instead of an mstp clock */
-		if (!strcmp(clkspec.np->name, "zb_clk"))
-			goto found;
-
-		of_node_put(clkspec.np);
-		i++;
-	}
-
-	return 0;
-
-found:
-	clk = of_clk_get_from_provider(&clkspec);
-	of_node_put(clkspec.np);
-
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
-
-	error = pm_clk_create(dev);
-	if (error) {
-		dev_err(dev, "pm_clk_create failed %d\n", error);
-		goto fail_put;
-	}
-
-	error = pm_clk_add_clk(dev, clk);
-	if (error) {
-		dev_err(dev, "pm_clk_add_clk %pC failed %d\n", clk, error);
-		goto fail_destroy;
-	}
-
-	return 0;
-
-fail_destroy:
-	pm_clk_destroy(dev);
-fail_put:
-	clk_put(clk);
-	return error;
-}
-
-void cpg_mstp_detach_dev(struct generic_pm_domain *domain, struct device *dev)
-{
-	if (!list_empty(&dev->power.subsys_data->clock_list))
-		pm_clk_destroy(dev);
-}
-
-void __init cpg_mstp_add_clk_domain(struct device_node *np)
-{
-	struct generic_pm_domain *pd;
-	u32 ncells;
-
-	if (of_property_read_u32(np, "#power-domain-cells", &ncells)) {
-		pr_warn("%s lacks #power-domain-cells\n", np->full_name);
-		return;
-	}
-
-	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
-	if (!pd)
-		return;
-
-	pd->name = np->name;
-
-	pd->flags = GENPD_FLAG_PM_CLK;
-	pm_genpd_init(pd, &simple_qos_governor, false);
-	pd->attach_dev = cpg_mstp_attach_dev;
-	pd->detach_dev = cpg_mstp_detach_dev;
-
-	of_genpd_add_provider_simple(np, pd);
-}
-#endif /* !CONFIG_PM_GENERIC_DOMAINS_OF */