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path: root/drivers/clk/qcom/clk-regmap.c
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Diffstat (limited to 'drivers/clk/qcom/clk-regmap.c')
-rw-r--r--drivers/clk/qcom/clk-regmap.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/clk/qcom/clk-regmap.c b/drivers/clk/qcom/clk-regmap.c
new file mode 100644
index 000000000000..a58ba39a900c
--- /dev/null
+++ b/drivers/clk/qcom/clk-regmap.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#include <linux/device.h>
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+#include <linux/export.h>
+
+#include "clk-regmap.h"
+
+/**
+ * clk_is_enabled_regmap - standard is_enabled() for regmap users
+ *
+ * @hw: clk to operate on
+ *
+ * Clocks that use regmap for their register I/O can set the
+ * enable_reg and enable_mask fields in their struct clk_regmap and then use
+ * this as their is_enabled operation, saving some code.
+ */
+int clk_is_enabled_regmap(struct clk_hw *hw)
+{
+ struct clk_regmap *rclk = to_clk_regmap(hw);
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(rclk->regmap, rclk->enable_reg, &val);
+ if (ret != 0)
+ return ret;
+
+ if (rclk->enable_is_inverted)
+ return (val & rclk->enable_mask) == 0;
+ else
+ return (val & rclk->enable_mask) != 0;
+}
+EXPORT_SYMBOL_GPL(clk_is_enabled_regmap);
+
+/**
+ * clk_enable_regmap - standard enable() for regmap users
+ *
+ * @hw: clk to operate on
+ *
+ * Clocks that use regmap for their register I/O can set the
+ * enable_reg and enable_mask fields in their struct clk_regmap and then use
+ * this as their enable() operation, saving some code.
+ */
+int clk_enable_regmap(struct clk_hw *hw)
+{
+ struct clk_regmap *rclk = to_clk_regmap(hw);
+ unsigned int val;
+
+ if (rclk->enable_is_inverted)
+ val = 0;
+ else
+ val = rclk->enable_mask;
+
+ return regmap_update_bits(rclk->regmap, rclk->enable_reg,
+ rclk->enable_mask, val);
+}
+EXPORT_SYMBOL_GPL(clk_enable_regmap);
+
+/**
+ * clk_disable_regmap - standard disable() for regmap users
+ *
+ * @hw: clk to operate on
+ *
+ * Clocks that use regmap for their register I/O can set the
+ * enable_reg and enable_mask fields in their struct clk_regmap and then use
+ * this as their disable() operation, saving some code.
+ */
+void clk_disable_regmap(struct clk_hw *hw)
+{
+ struct clk_regmap *rclk = to_clk_regmap(hw);
+ unsigned int val;
+
+ if (rclk->enable_is_inverted)
+ val = rclk->enable_mask;
+ else
+ val = 0;
+
+ regmap_update_bits(rclk->regmap, rclk->enable_reg, rclk->enable_mask,
+ val);
+}
+EXPORT_SYMBOL_GPL(clk_disable_regmap);
+
+/**
+ * devm_clk_register_regmap - register a clk_regmap clock
+ *
+ * @rclk: clk to operate on
+ *
+ * Clocks that use regmap for their register I/O should register their
+ * clk_regmap struct via this function so that the regmap is initialized
+ * and so that the clock is registered with the common clock framework.
+ */
+struct clk *devm_clk_register_regmap(struct device *dev,
+ struct clk_regmap *rclk)
+{
+ if (dev && dev_get_regmap(dev, NULL))
+ rclk->regmap = dev_get_regmap(dev, NULL);
+ else if (dev && dev->parent)
+ rclk->regmap = dev_get_regmap(dev->parent, NULL);
+
+ return devm_clk_register(dev, &rclk->hw);
+}
+EXPORT_SYMBOL_GPL(devm_clk_register_regmap);