clk: tegra: Add super clock mux/divider
Add a super clock type which implements both mux and divider. This is
used for aclk.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Tested-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/clk/tegra/clk-super.c b/drivers/clk/tegra/clk-super.c
index 131d1b50..84267cf 100644
--- a/drivers/clk/tegra/clk-super.c
+++ b/drivers/clk/tegra/clk-super.c
@@ -121,9 +121,50 @@
return err;
}
+const struct clk_ops tegra_clk_super_mux_ops = {
+ .get_parent = clk_super_get_parent,
+ .set_parent = clk_super_set_parent,
+};
+
+static long clk_super_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct tegra_clk_super_mux *super = to_clk_super_mux(hw);
+ struct clk_hw *div_hw = &super->frac_div.hw;
+
+ __clk_hw_set_clk(div_hw, hw);
+
+ return super->div_ops->round_rate(div_hw, rate, parent_rate);
+}
+
+static unsigned long clk_super_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_super_mux *super = to_clk_super_mux(hw);
+ struct clk_hw *div_hw = &super->frac_div.hw;
+
+ __clk_hw_set_clk(div_hw, hw);
+
+ return super->div_ops->recalc_rate(div_hw, parent_rate);
+}
+
+static int clk_super_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct tegra_clk_super_mux *super = to_clk_super_mux(hw);
+ struct clk_hw *div_hw = &super->frac_div.hw;
+
+ __clk_hw_set_clk(div_hw, hw);
+
+ return super->div_ops->set_rate(div_hw, rate, parent_rate);
+}
+
const struct clk_ops tegra_clk_super_ops = {
.get_parent = clk_super_get_parent,
.set_parent = clk_super_set_parent,
+ .set_rate = clk_super_set_rate,
+ .round_rate = clk_super_round_rate,
+ .recalc_rate = clk_super_recalc_rate,
};
struct clk *tegra_clk_register_super_mux(const char *name,
@@ -136,13 +177,11 @@
struct clk_init_data init;
super = kzalloc(sizeof(*super), GFP_KERNEL);
- if (!super) {
- pr_err("%s: could not allocate super clk\n", __func__);
+ if (!super)
return ERR_PTR(-ENOMEM);
- }
init.name = name;
- init.ops = &tegra_clk_super_ops;
+ init.ops = &tegra_clk_super_mux_ops;
init.flags = flags;
init.parent_names = parent_names;
init.num_parents = num_parents;
@@ -163,3 +202,43 @@
return clk;
}
+
+struct clk *tegra_clk_register_super_clk(const char *name,
+ const char * const *parent_names, u8 num_parents,
+ unsigned long flags, void __iomem *reg, u8 clk_super_flags,
+ spinlock_t *lock)
+{
+ struct tegra_clk_super_mux *super;
+ struct clk *clk;
+ struct clk_init_data init;
+
+ super = kzalloc(sizeof(*super), GFP_KERNEL);
+ if (!super)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &tegra_clk_super_ops;
+ init.flags = flags;
+ init.parent_names = parent_names;
+ init.num_parents = num_parents;
+
+ super->reg = reg;
+ super->lock = lock;
+ super->width = 4;
+ super->flags = clk_super_flags;
+ super->frac_div.reg = reg + 4;
+ super->frac_div.shift = 16;
+ super->frac_div.width = 8;
+ super->frac_div.frac_width = 1;
+ super->frac_div.lock = lock;
+ super->div_ops = &tegra_clk_frac_div_ops;
+
+ /* Data in .init is copied by clk_register(), so stack variable OK */
+ super->hw.init = &init;
+
+ clk = clk_register(NULL, &super->hw);
+ if (IS_ERR(clk))
+ kfree(super);
+
+ return clk;
+}