Add DT binding for gate clock as "gate-clock".
Signed-off-by: David Yang <mmyangfl@xxxxxxxxx>
---
drivers/clk/clk-gate.c | 81 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 81 insertions(+)
diff --git a/drivers/clk/clk-gate.c b/drivers/clk/clk-gate.c
index 64283807600b..a70df4a2a9a7 100644
--- a/drivers/clk/clk-gate.c
+++ b/drivers/clk/clk-gate.c
@@ -12,8 +12,11 @@
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
+#include <linux/platform_device.h>
#include <linux/string.h>
+#include "clk-of.h"
+
/**
* DOC: basic gatable clock which can gate and ungate it's ouput
*
@@ -257,3 +260,81 @@ struct clk_hw *__devm_clk_hw_register_gate(struct device *dev,
return hw;
}
EXPORT_SYMBOL_GPL(__devm_clk_hw_register_gate);
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_clk_flag of_clk_gate_flags[] = {
+ { "set-to-disable", CLK_GATE_SET_TO_DISABLE },
+ { "hiword-mask", CLK_GATE_HIWORD_MASK },
+ { "big-endian", CLK_GATE_BIG_ENDIAN },
+ { }
+};
+
+static int of_clk_gate_setup(struct device_node *np)
+{
+ struct of_clk_ctrl *ctrl = np->parent->data;
+ const char *name;
+ void __iomem *reg;
+ u32 bit_idx;
+
+ const char *property;
+ struct clk_hw *hw;
+ int ret;
+
+ reg = of_clk_get_reg(np);
+ if (!reg)
+ return -ENOMEM;
+ name = of_clk_get_name(np);
+ if (!name)
+ return -EINVAL;
+
+ property = "bits";
+ if (of_property_read_u32(np, property, &bit_idx))
+ goto err_property;
+
+ hw = __clk_hw_register_gate(NULL, np, name,
+ of_clk_get_parent_name(np, 0),
+ NULL, NULL, of_clk_get_flags(np, NULL),
+ reg, bit_idx,
+ of_clk_get_flags(np, of_clk_gate_flags),
+ &ctrl->lock);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+
+ ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
+ if (ret)
+ goto err_register;
+
+ np->data = hw;
+ return 0;
+
+err_register:
+ clk_hw_unregister(hw);
+ return ret;
+
+err_property:
+ pr_err("%s: clock %s missing required property \"%s\"\n",
+ __func__, name, property);
+ return -EINVAL;
+}
+
+static void __init of_clk_gate_init(struct device_node *np)
+{
+ of_clk_gate_setup(np);
+}
+CLK_OF_DECLARE(of_clk_gate, "gate-clock", of_clk_gate_init);
+
+static const struct of_device_id of_clk_gate_ids[] = {
+ { .compatible = "gate-clock", .data = of_clk_gate_setup },
+ { }
+};
+
+static struct platform_driver of_clk_gate_driver = {
+ .driver = {
+ .name = "clk_gate",
+ .of_match_table = of_clk_gate_ids,
+ },
+ .probe = of_clk_probe,
+ .remove = of_clk_remove,
+};
+builtin_platform_driver(of_clk_gate_driver);
+#endif
--
2.39.2
