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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arm/mach-imx/clk-gate2.c
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/arm/mach-imx/clk-gate2.c')
-rw-r--r--kernel/arch/arm/mach-imx/clk-gate2.c160
1 files changed, 0 insertions, 160 deletions
diff --git a/kernel/arch/arm/mach-imx/clk-gate2.c b/kernel/arch/arm/mach-imx/clk-gate2.c
deleted file mode 100644
index 8935bff99..000000000
--- a/kernel/arch/arm/mach-imx/clk-gate2.c
+++ /dev/null
@@ -1,160 +0,0 @@
-/*
- * Copyright (C) 2010-2011 Canonical Ltd <jeremy.kerr@canonical.com>
- * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd <mturquette@linaro.org>
- *
- * 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.
- *
- * Gated clock implementation
- */
-
-#include <linux/clk-provider.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <linux/err.h>
-#include <linux/string.h>
-#include "clk.h"
-
-/**
- * DOC: basic gatable clock which can gate and ungate it's ouput
- *
- * Traits of this clock:
- * prepare - clk_(un)prepare only ensures parent is (un)prepared
- * enable - clk_enable and clk_disable are functional & control gating
- * rate - inherits rate from parent. No clk_set_rate support
- * parent - fixed parent. No clk_set_parent support
- */
-
-struct clk_gate2 {
- struct clk_hw hw;
- void __iomem *reg;
- u8 bit_idx;
- u8 flags;
- spinlock_t *lock;
- unsigned int *share_count;
-};
-
-#define to_clk_gate2(_hw) container_of(_hw, struct clk_gate2, hw)
-
-static int clk_gate2_enable(struct clk_hw *hw)
-{
- struct clk_gate2 *gate = to_clk_gate2(hw);
- u32 reg;
- unsigned long flags = 0;
-
- spin_lock_irqsave(gate->lock, flags);
-
- if (gate->share_count && (*gate->share_count)++ > 0)
- goto out;
-
- reg = readl(gate->reg);
- reg |= 3 << gate->bit_idx;
- writel(reg, gate->reg);
-
-out:
- spin_unlock_irqrestore(gate->lock, flags);
-
- return 0;
-}
-
-static void clk_gate2_disable(struct clk_hw *hw)
-{
- struct clk_gate2 *gate = to_clk_gate2(hw);
- u32 reg;
- unsigned long flags = 0;
-
- spin_lock_irqsave(gate->lock, flags);
-
- if (gate->share_count) {
- if (WARN_ON(*gate->share_count == 0))
- goto out;
- else if (--(*gate->share_count) > 0)
- goto out;
- }
-
- reg = readl(gate->reg);
- reg &= ~(3 << gate->bit_idx);
- writel(reg, gate->reg);
-
-out:
- spin_unlock_irqrestore(gate->lock, flags);
-}
-
-static int clk_gate2_reg_is_enabled(void __iomem *reg, u8 bit_idx)
-{
- u32 val = readl(reg);
-
- if (((val >> bit_idx) & 1) == 1)
- return 1;
-
- return 0;
-}
-
-static int clk_gate2_is_enabled(struct clk_hw *hw)
-{
- struct clk_gate2 *gate = to_clk_gate2(hw);
-
- return clk_gate2_reg_is_enabled(gate->reg, gate->bit_idx);
-}
-
-static void clk_gate2_disable_unused(struct clk_hw *hw)
-{
- struct clk_gate2 *gate = to_clk_gate2(hw);
- unsigned long flags = 0;
- u32 reg;
-
- spin_lock_irqsave(gate->lock, flags);
-
- if (!gate->share_count || *gate->share_count == 0) {
- reg = readl(gate->reg);
- reg &= ~(3 << gate->bit_idx);
- writel(reg, gate->reg);
- }
-
- spin_unlock_irqrestore(gate->lock, flags);
-}
-
-static struct clk_ops clk_gate2_ops = {
- .enable = clk_gate2_enable,
- .disable = clk_gate2_disable,
- .disable_unused = clk_gate2_disable_unused,
- .is_enabled = clk_gate2_is_enabled,
-};
-
-struct clk *clk_register_gate2(struct device *dev, const char *name,
- const char *parent_name, unsigned long flags,
- void __iomem *reg, u8 bit_idx,
- u8 clk_gate2_flags, spinlock_t *lock,
- unsigned int *share_count)
-{
- struct clk_gate2 *gate;
- struct clk *clk;
- struct clk_init_data init;
-
- gate = kzalloc(sizeof(struct clk_gate2), GFP_KERNEL);
- if (!gate)
- return ERR_PTR(-ENOMEM);
-
- /* struct clk_gate2 assignments */
- gate->reg = reg;
- gate->bit_idx = bit_idx;
- gate->flags = clk_gate2_flags;
- gate->lock = lock;
- gate->share_count = share_count;
-
- init.name = name;
- init.ops = &clk_gate2_ops;
- init.flags = flags;
- init.parent_names = parent_name ? &parent_name : NULL;
- init.num_parents = parent_name ? 1 : 0;
-
- gate->hw.init = &init;
-
- clk = clk_register(dev, &gate->hw);
- if (IS_ERR(clk))
- kfree(gate);
-
- return clk;
-}