[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/clk/ti/autoidle.c b/src/kernel/linux/v4.14/drivers/clk/ti/autoidle.c
new file mode 100644
index 0000000..7bb9afb
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/clk/ti/autoidle.c
@@ -0,0 +1,232 @@
+/*
+ * TI clock autoidle support
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ *
+ * Tero Kristo <t-kristo@ti.com>
+ *
+ * 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 "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/clk/ti.h>
+
+#include "clock.h"
+
+struct clk_ti_autoidle {
+ struct clk_omap_reg reg;
+ u8 shift;
+ u8 flags;
+ const char *name;
+ struct list_head node;
+};
+
+#define AUTOIDLE_LOW 0x1
+
+static LIST_HEAD(autoidle_clks);
+static LIST_HEAD(clk_hw_omap_clocks);
+
+/**
+ * omap2_clk_deny_idle - disable autoidle on an OMAP clock
+ * @clk: struct clk * to disable autoidle for
+ *
+ * Disable autoidle on an OMAP clock.
+ */
+int omap2_clk_deny_idle(struct clk *clk)
+{
+ struct clk_hw_omap *c;
+
+ c = to_clk_hw_omap(__clk_get_hw(clk));
+ if (c->ops && c->ops->deny_idle)
+ c->ops->deny_idle(c);
+ return 0;
+}
+
+/**
+ * omap2_clk_allow_idle - enable autoidle on an OMAP clock
+ * @clk: struct clk * to enable autoidle for
+ *
+ * Enable autoidle on an OMAP clock.
+ */
+int omap2_clk_allow_idle(struct clk *clk)
+{
+ struct clk_hw_omap *c;
+
+ c = to_clk_hw_omap(__clk_get_hw(clk));
+ if (c->ops && c->ops->allow_idle)
+ c->ops->allow_idle(c);
+ return 0;
+}
+
+static void _allow_autoidle(struct clk_ti_autoidle *clk)
+{
+ u32 val;
+
+ val = ti_clk_ll_ops->clk_readl(&clk->reg);
+
+ if (clk->flags & AUTOIDLE_LOW)
+ val &= ~(1 << clk->shift);
+ else
+ val |= (1 << clk->shift);
+
+ ti_clk_ll_ops->clk_writel(val, &clk->reg);
+}
+
+static void _deny_autoidle(struct clk_ti_autoidle *clk)
+{
+ u32 val;
+
+ val = ti_clk_ll_ops->clk_readl(&clk->reg);
+
+ if (clk->flags & AUTOIDLE_LOW)
+ val |= (1 << clk->shift);
+ else
+ val &= ~(1 << clk->shift);
+
+ ti_clk_ll_ops->clk_writel(val, &clk->reg);
+}
+
+/**
+ * _clk_generic_allow_autoidle_all - enable autoidle for all clocks
+ *
+ * Enables hardware autoidle for all registered DT clocks, which have
+ * the feature.
+ */
+static void _clk_generic_allow_autoidle_all(void)
+{
+ struct clk_ti_autoidle *c;
+
+ list_for_each_entry(c, &autoidle_clks, node)
+ _allow_autoidle(c);
+}
+
+/**
+ * _clk_generic_deny_autoidle_all - disable autoidle for all clocks
+ *
+ * Disables hardware autoidle for all registered DT clocks, which have
+ * the feature.
+ */
+static void _clk_generic_deny_autoidle_all(void)
+{
+ struct clk_ti_autoidle *c;
+
+ list_for_each_entry(c, &autoidle_clks, node)
+ _deny_autoidle(c);
+}
+
+/**
+ * of_ti_clk_autoidle_setup - sets up hardware autoidle for a clock
+ * @node: pointer to the clock device node
+ *
+ * Checks if a clock has hardware autoidle support or not (check
+ * for presence of 'ti,autoidle-shift' property in the device tree
+ * node) and sets up the hardware autoidle feature for the clock
+ * if available. If autoidle is available, the clock is also added
+ * to the autoidle list for later processing. Returns 0 on success,
+ * negative error value on failure.
+ */
+int __init of_ti_clk_autoidle_setup(struct device_node *node)
+{
+ u32 shift;
+ struct clk_ti_autoidle *clk;
+ int ret;
+
+ /* Check if this clock has autoidle support or not */
+ if (of_property_read_u32(node, "ti,autoidle-shift", &shift))
+ return 0;
+
+ clk = kzalloc(sizeof(*clk), GFP_KERNEL);
+
+ if (!clk)
+ return -ENOMEM;
+
+ clk->shift = shift;
+ clk->name = node->name;
+ ret = ti_clk_get_reg_addr(node, 0, &clk->reg);
+ if (ret) {
+ kfree(clk);
+ return ret;
+ }
+
+ if (of_property_read_bool(node, "ti,invert-autoidle-bit"))
+ clk->flags |= AUTOIDLE_LOW;
+
+ list_add(&clk->node, &autoidle_clks);
+
+ return 0;
+}
+
+/**
+ * omap2_init_clk_hw_omap_clocks - initialize an OMAP clock
+ * @hw: struct clk_hw * to initialize
+ *
+ * Add an OMAP clock @clk to the internal list of OMAP clocks. Used
+ * temporarily for autoidle handling, until this support can be
+ * integrated into the common clock framework code in some way. No
+ * return value.
+ */
+void omap2_init_clk_hw_omap_clocks(struct clk_hw *hw)
+{
+ struct clk_hw_omap *c;
+
+ if (clk_hw_get_flags(hw) & CLK_IS_BASIC)
+ return;
+
+ c = to_clk_hw_omap(hw);
+ list_add(&c->node, &clk_hw_omap_clocks);
+}
+
+/**
+ * omap2_clk_enable_autoidle_all - enable autoidle on all OMAP clocks that
+ * support it
+ *
+ * Enable clock autoidle on all OMAP clocks that have allow_idle
+ * function pointers associated with them. This function is intended
+ * to be temporary until support for this is added to the common clock
+ * code. Returns 0.
+ */
+int omap2_clk_enable_autoidle_all(void)
+{
+ struct clk_hw_omap *c;
+
+ list_for_each_entry(c, &clk_hw_omap_clocks, node)
+ if (c->ops && c->ops->allow_idle)
+ c->ops->allow_idle(c);
+
+ _clk_generic_allow_autoidle_all();
+
+ return 0;
+}
+
+/**
+ * omap2_clk_disable_autoidle_all - disable autoidle on all OMAP clocks that
+ * support it
+ *
+ * Disable clock autoidle on all OMAP clocks that have allow_idle
+ * function pointers associated with them. This function is intended
+ * to be temporary until support for this is added to the common clock
+ * code. Returns 0.
+ */
+int omap2_clk_disable_autoidle_all(void)
+{
+ struct clk_hw_omap *c;
+
+ list_for_each_entry(c, &clk_hw_omap_clocks, node)
+ if (c->ops && c->ops->deny_idle)
+ c->ops->deny_idle(c);
+
+ _clk_generic_deny_autoidle_all();
+
+ return 0;
+}