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-rw-r--r--drivers/clk/actions/owl-composite.c212
1 files changed, 212 insertions, 0 deletions
diff --git a/drivers/clk/actions/owl-composite.c b/drivers/clk/actions/owl-composite.c
new file mode 100644
index 0000000000..48f177f6ce
--- /dev/null
+++ b/drivers/clk/actions/owl-composite.c
@@ -0,0 +1,212 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// OWL composite clock driver
+//
+// Copyright (c) 2014 Actions Semi Inc.
+// Author: David Liu <liuwei@actions-semi.com>
+//
+// Copyright (c) 2018 Linaro Ltd.
+// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+
+#include "owl-composite.h"
+
+static u8 owl_comp_get_parent(struct clk_hw *hw)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+
+ return owl_mux_helper_get_parent(&comp->common, &comp->mux_hw);
+}
+
+static int owl_comp_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+
+ return owl_mux_helper_set_parent(&comp->common, &comp->mux_hw, index);
+}
+
+static void owl_comp_disable(struct clk_hw *hw)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+ struct owl_clk_common *common = &comp->common;
+
+ owl_gate_set(common, &comp->gate_hw, false);
+}
+
+static int owl_comp_enable(struct clk_hw *hw)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+ struct owl_clk_common *common = &comp->common;
+
+ owl_gate_set(common, &comp->gate_hw, true);
+
+ return 0;
+}
+
+static int owl_comp_is_enabled(struct clk_hw *hw)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+ struct owl_clk_common *common = &comp->common;
+
+ return owl_gate_clk_is_enabled(common, &comp->gate_hw);
+}
+
+static int owl_comp_div_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+ long rate;
+
+ rate = owl_divider_helper_round_rate(&comp->common, &comp->rate.div_hw,
+ req->rate, &req->best_parent_rate);
+ if (rate < 0)
+ return rate;
+
+ req->rate = rate;
+ return 0;
+}
+
+static unsigned long owl_comp_div_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+
+ return owl_divider_helper_recalc_rate(&comp->common, &comp->rate.div_hw,
+ parent_rate);
+}
+
+static int owl_comp_div_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+
+ return owl_divider_helper_set_rate(&comp->common, &comp->rate.div_hw,
+ rate, parent_rate);
+}
+
+static int owl_comp_fact_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+ long rate;
+
+ rate = owl_factor_helper_round_rate(&comp->common,
+ &comp->rate.factor_hw,
+ req->rate, &req->best_parent_rate);
+ if (rate < 0)
+ return rate;
+
+ req->rate = rate;
+ return 0;
+}
+
+static unsigned long owl_comp_fact_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+
+ return owl_factor_helper_recalc_rate(&comp->common,
+ &comp->rate.factor_hw,
+ parent_rate);
+}
+
+static int owl_comp_fact_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+
+ return owl_factor_helper_set_rate(&comp->common,
+ &comp->rate.factor_hw,
+ rate, parent_rate);
+}
+
+static long owl_comp_fix_fact_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+ struct clk_fixed_factor *fix_fact_hw = &comp->rate.fix_fact_hw;
+
+ return comp->fix_fact_ops->round_rate(&fix_fact_hw->hw, rate, parent_rate);
+}
+
+static unsigned long owl_comp_fix_fact_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct owl_composite *comp = hw_to_owl_comp(hw);
+ struct clk_fixed_factor *fix_fact_hw = &comp->rate.fix_fact_hw;
+
+ return comp->fix_fact_ops->recalc_rate(&fix_fact_hw->hw, parent_rate);
+
+}
+
+static int owl_comp_fix_fact_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ /*
+ * We must report success but we can do so unconditionally because
+ * owl_comp_fix_fact_round_rate returns values that ensure this call is
+ * a nop.
+ */
+
+ return 0;
+}
+
+const struct clk_ops owl_comp_div_ops = {
+ /* mux_ops */
+ .get_parent = owl_comp_get_parent,
+ .set_parent = owl_comp_set_parent,
+
+ /* gate_ops */
+ .disable = owl_comp_disable,
+ .enable = owl_comp_enable,
+ .is_enabled = owl_comp_is_enabled,
+
+ /* div_ops */
+ .determine_rate = owl_comp_div_determine_rate,
+ .recalc_rate = owl_comp_div_recalc_rate,
+ .set_rate = owl_comp_div_set_rate,
+};
+
+
+const struct clk_ops owl_comp_fact_ops = {
+ /* mux_ops */
+ .get_parent = owl_comp_get_parent,
+ .set_parent = owl_comp_set_parent,
+
+ /* gate_ops */
+ .disable = owl_comp_disable,
+ .enable = owl_comp_enable,
+ .is_enabled = owl_comp_is_enabled,
+
+ /* fact_ops */
+ .determine_rate = owl_comp_fact_determine_rate,
+ .recalc_rate = owl_comp_fact_recalc_rate,
+ .set_rate = owl_comp_fact_set_rate,
+};
+
+const struct clk_ops owl_comp_fix_fact_ops = {
+ /* gate_ops */
+ .disable = owl_comp_disable,
+ .enable = owl_comp_enable,
+ .is_enabled = owl_comp_is_enabled,
+
+ /* fix_fact_ops */
+ .round_rate = owl_comp_fix_fact_round_rate,
+ .recalc_rate = owl_comp_fix_fact_recalc_rate,
+ .set_rate = owl_comp_fix_fact_set_rate,
+};
+
+
+const struct clk_ops owl_comp_pass_ops = {
+ /* mux_ops */
+ .determine_rate = clk_hw_determine_rate_no_reparent,
+ .get_parent = owl_comp_get_parent,
+ .set_parent = owl_comp_set_parent,
+
+ /* gate_ops */
+ .disable = owl_comp_disable,
+ .enable = owl_comp_enable,
+ .is_enabled = owl_comp_is_enabled,
+};