修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/drivers/clk/ti/autoidle.c
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@@ -35,7 +35,44 @@
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 #define AUTOIDLE_LOW		0x1
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 static LIST_HEAD(autoidle_clks);
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-static LIST_HEAD(clk_hw_omap_clocks);
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+
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+/*
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+ * we have some non-atomic read/write
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+ * operations behind it, so lets
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+ * take one lock for handling autoidle
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+ * of all clocks
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+ */
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+static DEFINE_SPINLOCK(autoidle_spinlock);
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+
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+static int _omap2_clk_deny_idle(struct clk_hw_omap *clk)
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+{
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+	if (clk->ops && clk->ops->deny_idle) {
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+		unsigned long irqflags;
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+
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+		spin_lock_irqsave(&autoidle_spinlock, irqflags);
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+		clk->autoidle_count++;
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+		if (clk->autoidle_count == 1)
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+			clk->ops->deny_idle(clk);
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+
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+		spin_unlock_irqrestore(&autoidle_spinlock, irqflags);
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+	}
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+	return 0;
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+}
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+
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+static int _omap2_clk_allow_idle(struct clk_hw_omap *clk)
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+{
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+	if (clk->ops && clk->ops->allow_idle) {
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+		unsigned long irqflags;
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+
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+		spin_lock_irqsave(&autoidle_spinlock, irqflags);
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+		clk->autoidle_count--;
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+		if (clk->autoidle_count == 0)
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+			clk->ops->allow_idle(clk);
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+
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+		spin_unlock_irqrestore(&autoidle_spinlock, irqflags);
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+	}
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+	return 0;
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+}
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 /**
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  * omap2_clk_deny_idle - disable autoidle on an OMAP clock
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@@ -45,12 +82,20 @@
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  */
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 int omap2_clk_deny_idle(struct clk *clk)
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 {
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-	struct clk_hw_omap *c;
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+	struct clk_hw *hw;
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-	c = to_clk_hw_omap(__clk_get_hw(clk));
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-	if (c->ops && c->ops->deny_idle)
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-		c->ops->deny_idle(c);
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-	return 0;
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+	if (!clk)
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+		return -EINVAL;
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+
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+	hw = __clk_get_hw(clk);
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+
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+	if (omap2_clk_is_hw_omap(hw)) {
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+		struct clk_hw_omap *c = to_clk_hw_omap(hw);
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+
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+		return _omap2_clk_deny_idle(c);
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+	}
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+
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+	return -EINVAL;
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 }
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 /**
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@@ -61,12 +106,20 @@
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  */
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 int omap2_clk_allow_idle(struct clk *clk)
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 {
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-	struct clk_hw_omap *c;
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+	struct clk_hw *hw;
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-	c = to_clk_hw_omap(__clk_get_hw(clk));
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-	if (c->ops && c->ops->allow_idle)
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-		c->ops->allow_idle(c);
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-	return 0;
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+	if (!clk)
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+		return -EINVAL;
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+
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+	hw = __clk_get_hw(clk);
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+
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+	if (omap2_clk_is_hw_omap(hw)) {
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+		struct clk_hw_omap *c = to_clk_hw_omap(hw);
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+
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+		return _omap2_clk_allow_idle(c);
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+	}
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+
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+	return -EINVAL;
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 }
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 static void _allow_autoidle(struct clk_ti_autoidle *clk)
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@@ -168,26 +221,6 @@
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 }
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 /**
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- * omap2_init_clk_hw_omap_clocks - initialize an OMAP clock
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- * @hw: struct clk_hw * to initialize
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- *
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- * Add an OMAP clock @clk to the internal list of OMAP clocks.  Used
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- * temporarily for autoidle handling, until this support can be
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- * integrated into the common clock framework code in some way.  No
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- * return value.
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- */
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-void omap2_init_clk_hw_omap_clocks(struct clk_hw *hw)
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-{
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-	struct clk_hw_omap *c;
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-
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-	if (clk_hw_get_flags(hw) & CLK_IS_BASIC)
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-		return;
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-
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-	c = to_clk_hw_omap(hw);
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-	list_add(&c->node, &clk_hw_omap_clocks);
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-}
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-
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-/**
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  * omap2_clk_enable_autoidle_all - enable autoidle on all OMAP clocks that
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  * support it
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  *
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@@ -198,11 +231,11 @@
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  */
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 int omap2_clk_enable_autoidle_all(void)
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 {
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-	struct clk_hw_omap *c;
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+	int ret;
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-	list_for_each_entry(c, &clk_hw_omap_clocks, node)
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-		if (c->ops && c->ops->allow_idle)
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-			c->ops->allow_idle(c);
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+	ret = omap2_clk_for_each(_omap2_clk_allow_idle);
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+	if (ret)
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+		return ret;
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 	_clk_generic_allow_autoidle_all();
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@@ -220,11 +253,11 @@
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  */
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 int omap2_clk_disable_autoidle_all(void)
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 {
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-	struct clk_hw_omap *c;
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+	int ret;
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-	list_for_each_entry(c, &clk_hw_omap_clocks, node)
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-		if (c->ops && c->ops->deny_idle)
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-			c->ops->deny_idle(c);
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+	ret = omap2_clk_for_each(_omap2_clk_deny_idle);
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+	if (ret)
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+		return ret;
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 	_clk_generic_deny_autoidle_all();
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