1 files changed, 173 insertions, 0 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_mult.c b/drivers/clk/sunxi-ng/ccu_mult.c
new file mode 100644
index 000000000..7bee217ef
--- /dev/null
+++ b/drivers/clk/sunxi-ng/ccu_mult.c
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Maxime Ripard
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+
+#include "ccu_gate.h"
+#include "ccu_mult.h"
+
+struct _ccu_mult {
+	unsigned long	mult, min, max;
+};
+
+static void ccu_mult_find_best(unsigned long parent, unsigned long rate,
+			       struct _ccu_mult *mult)
+{
+	int _mult;
+
+	_mult = rate / parent;
+	if (_mult < mult->min)
+		_mult = mult->min;
+
+	if (_mult > mult->max)
+		_mult = mult->max;
+
+	mult->mult = _mult;
+}
+
+static unsigned long ccu_mult_round_rate(struct ccu_mux_internal *mux,
+					 struct clk_hw *parent,
+					 unsigned long *parent_rate,
+					 unsigned long rate,
+					 void *data)
+{
+	struct ccu_mult *cm = data;
+	struct _ccu_mult _cm;
+
+	_cm.min = cm->mult.min;
+
+	if (cm->mult.max)
+		_cm.max = cm->mult.max;
+	else
+		_cm.max = (1 << cm->mult.width) + cm->mult.offset - 1;
+
+	ccu_mult_find_best(*parent_rate, rate, &_cm);
+
+	return *parent_rate * _cm.mult;
+}
+
+static void ccu_mult_disable(struct clk_hw *hw)
+{
+	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+
+	return ccu_gate_helper_disable(&cm->common, cm->enable);
+}
+
+static int ccu_mult_enable(struct clk_hw *hw)
+{
+	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+
+	return ccu_gate_helper_enable(&cm->common, cm->enable);
+}
+
+static int ccu_mult_is_enabled(struct clk_hw *hw)
+{
+	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+
+	return ccu_gate_helper_is_enabled(&cm->common, cm->enable);
+}
+
+static unsigned long ccu_mult_recalc_rate(struct clk_hw *hw,
+					unsigned long parent_rate)
+{
+	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+	unsigned long val;
+	u32 reg;
+
+	if (ccu_frac_helper_is_enabled(&cm->common, &cm->frac))
+		return ccu_frac_helper_read_rate(&cm->common, &cm->frac);
+
+	reg = readl(cm->common.base + cm->common.reg);
+	val = reg >> cm->mult.shift;
+	val &= (1 << cm->mult.width) - 1;
+
+	parent_rate = ccu_mux_helper_apply_prediv(&cm->common, &cm->mux, -1,
+						  parent_rate);
+
+	return parent_rate * (val + cm->mult.offset);
+}
+
+static int ccu_mult_determine_rate(struct clk_hw *hw,
+				struct clk_rate_request *req)
+{
+	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+
+	return ccu_mux_helper_determine_rate(&cm->common, &cm->mux,
+					     req, ccu_mult_round_rate, cm);
+}
+
+static int ccu_mult_set_rate(struct clk_hw *hw, unsigned long rate,
+			   unsigned long parent_rate)
+{
+	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+	struct _ccu_mult _cm;
+	unsigned long flags;
+	u32 reg;
+
+	if (ccu_frac_helper_has_rate(&cm->common, &cm->frac, rate)) {
+		ccu_frac_helper_enable(&cm->common, &cm->frac);
+
+		return ccu_frac_helper_set_rate(&cm->common, &cm->frac,
+						rate, cm->lock);
+	} else {
+		ccu_frac_helper_disable(&cm->common, &cm->frac);
+	}
+
+	parent_rate = ccu_mux_helper_apply_prediv(&cm->common, &cm->mux, -1,
+						  parent_rate);
+
+	_cm.min = cm->mult.min;
+
+	if (cm->mult.max)
+		_cm.max = cm->mult.max;
+	else
+		_cm.max = (1 << cm->mult.width) + cm->mult.offset - 1;
+
+	ccu_mult_find_best(parent_rate, rate, &_cm);
+
+	spin_lock_irqsave(cm->common.lock, flags);
+
+	reg = readl(cm->common.base + cm->common.reg);
+	reg &= ~GENMASK(cm->mult.width + cm->mult.shift - 1, cm->mult.shift);
+	reg |= ((_cm.mult - cm->mult.offset) << cm->mult.shift);
+
+	writel(reg, cm->common.base + cm->common.reg);
+
+	spin_unlock_irqrestore(cm->common.lock, flags);
+
+	ccu_helper_wait_for_lock(&cm->common, cm->lock);
+
+	return 0;
+}
+
+static u8 ccu_mult_get_parent(struct clk_hw *hw)
+{
+	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+
+	return ccu_mux_helper_get_parent(&cm->common, &cm->mux);
+}
+
+static int ccu_mult_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct ccu_mult *cm = hw_to_ccu_mult(hw);
+
+	return ccu_mux_helper_set_parent(&cm->common, &cm->mux, index);
+}
+
+const struct clk_ops ccu_mult_ops = {
+	.disable	= ccu_mult_disable,
+	.enable		= ccu_mult_enable,
+	.is_enabled	= ccu_mult_is_enabled,
+
+	.get_parent	= ccu_mult_get_parent,
+	.set_parent	= ccu_mult_set_parent,
+
+	.determine_rate	= ccu_mult_determine_rate,
+	.recalc_rate	= ccu_mult_recalc_rate,
+	.set_rate	= ccu_mult_set_rate,
+};
+EXPORT_SYMBOL_NS_GPL(ccu_mult_ops, SUNXI_CCU);