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-rw-r--r--target/linux/sunxi/patches-3.13/113-clk-sunxi-register-factors-clocks.patch232
1 files changed, 232 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.13/113-clk-sunxi-register-factors-clocks.patch b/target/linux/sunxi/patches-3.13/113-clk-sunxi-register-factors-clocks.patch
new file mode 100644
index 0000000..6a6974e
--- /dev/null
+++ b/target/linux/sunxi/patches-3.13/113-clk-sunxi-register-factors-clocks.patch
@@ -0,0 +1,232 @@
+From 9212bc4a3752e9a4db2f73afd99278eb28e5dcff Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Emilio=20L=C3=B3pez?= <emilio@elopez.com.ar>
+Date: Mon, 23 Dec 2013 00:32:32 -0300
+Subject: [PATCH] clk: sunxi: register factors clocks behind composite
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This commit reworks factors clock registration to be done behind a
+composite clock. This allows us to additionally add a gate, mux or
+divisors, as it will be needed by some future PLLs.
+
+Signed-off-by: Emilio López <emilio@elopez.com.ar>
+Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
+---
+ drivers/clk/sunxi/clk-factors.c | 63 +------------------------------------
+ drivers/clk/sunxi/clk-factors.h | 16 +++++-----
+ drivers/clk/sunxi/clk-sunxi.c | 70 ++++++++++++++++++++++++++++++++++++++---
+ 3 files changed, 76 insertions(+), 73 deletions(-)
+
+diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c
+index f05207a..9e23264 100644
+--- a/drivers/clk/sunxi/clk-factors.c
++++ b/drivers/clk/sunxi/clk-factors.c
+@@ -30,14 +30,6 @@
+ * parent - fixed parent. No clk_set_parent support
+ */
+
+-struct clk_factors {
+- struct clk_hw hw;
+- void __iomem *reg;
+- struct clk_factors_config *config;
+- void (*get_factors) (u32 *rate, u32 parent, u8 *n, u8 *k, u8 *m, u8 *p);
+- spinlock_t *lock;
+-};
+-
+ #define to_clk_factors(_hw) container_of(_hw, struct clk_factors, hw)
+
+ #define SETMASK(len, pos) (((1U << (len)) - 1) << (pos))
+@@ -120,61 +112,8 @@ static int clk_factors_set_rate(struct clk_hw *hw, unsigned long rate,
+ return 0;
+ }
+
+-static const struct clk_ops clk_factors_ops = {
++const struct clk_ops clk_factors_ops = {
+ .recalc_rate = clk_factors_recalc_rate,
+ .round_rate = clk_factors_round_rate,
+ .set_rate = clk_factors_set_rate,
+ };
+-
+-/**
+- * clk_register_factors - register a factors clock with
+- * the clock framework
+- * @dev: device registering this clock
+- * @name: name of this clock
+- * @parent_name: name of clock's parent
+- * @flags: framework-specific flags
+- * @reg: register address to adjust factors
+- * @config: shift and width of factors n, k, m and p
+- * @get_factors: function to calculate the factors for a given frequency
+- * @lock: shared register lock for this clock
+- */
+-struct clk *clk_register_factors(struct device *dev, const char *name,
+- const char *parent_name,
+- unsigned long flags, void __iomem *reg,
+- struct clk_factors_config *config,
+- void (*get_factors)(u32 *rate, u32 parent,
+- u8 *n, u8 *k, u8 *m, u8 *p),
+- spinlock_t *lock)
+-{
+- struct clk_factors *factors;
+- struct clk *clk;
+- struct clk_init_data init;
+-
+- /* allocate the factors */
+- factors = kzalloc(sizeof(struct clk_factors), GFP_KERNEL);
+- if (!factors) {
+- pr_err("%s: could not allocate factors clk\n", __func__);
+- return ERR_PTR(-ENOMEM);
+- }
+-
+- init.name = name;
+- init.ops = &clk_factors_ops;
+- init.flags = flags;
+- init.parent_names = (parent_name ? &parent_name : NULL);
+- init.num_parents = (parent_name ? 1 : 0);
+-
+- /* struct clk_factors assignments */
+- factors->reg = reg;
+- factors->config = config;
+- factors->lock = lock;
+- factors->hw.init = &init;
+- factors->get_factors = get_factors;
+-
+- /* register the clock */
+- clk = clk_register(dev, &factors->hw);
+-
+- if (IS_ERR(clk))
+- kfree(factors);
+-
+- return clk;
+-}
+diff --git a/drivers/clk/sunxi/clk-factors.h b/drivers/clk/sunxi/clk-factors.h
+index f49851c..02e1a43 100644
+--- a/drivers/clk/sunxi/clk-factors.h
++++ b/drivers/clk/sunxi/clk-factors.h
+@@ -17,11 +17,13 @@ struct clk_factors_config {
+ u8 pwidth;
+ };
+
+-struct clk *clk_register_factors(struct device *dev, const char *name,
+- const char *parent_name,
+- unsigned long flags, void __iomem *reg,
+- struct clk_factors_config *config,
+- void (*get_factors) (u32 *rate, u32 parent_rate,
+- u8 *n, u8 *k, u8 *m, u8 *p),
+- spinlock_t *lock);
++struct clk_factors {
++ struct clk_hw hw;
++ void __iomem *reg;
++ struct clk_factors_config *config;
++ void (*get_factors) (u32 *rate, u32 parent, u8 *n, u8 *k, u8 *m, u8 *p);
++ spinlock_t *lock;
++};
++
++extern const struct clk_ops clk_factors_ops;
+ #endif
+diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
+index 492ef0e..7dc39a6 100644
+--- a/drivers/clk/sunxi/clk-sunxi.c
++++ b/drivers/clk/sunxi/clk-sunxi.c
+@@ -23,6 +23,9 @@
+
+ static DEFINE_SPINLOCK(clk_lock);
+
++/* Maximum number of parents our clocks have */
++#define SUNXI_MAX_PARENTS 5
++
+ /**
+ * sun4i_osc_clk_setup() - Setup function for gatable oscillator
+ */
+@@ -261,7 +264,11 @@ static void sun4i_get_apb1_factors(u32 *freq, u32 parent_rate,
+ * sunxi_factors_clk_setup() - Setup function for factor clocks
+ */
+
++#define SUNXI_FACTORS_MUX_MASK 0x3
++
+ struct factors_data {
++ int enable;
++ int mux;
+ struct clk_factors_config *table;
+ void (*getter) (u32 *rate, u32 parent_rate, u8 *n, u8 *k, u8 *m, u8 *p);
+ };
+@@ -312,16 +319,71 @@ static void __init sunxi_factors_clk_setup(struct device_node *node,
+ struct factors_data *data)
+ {
+ struct clk *clk;
++ struct clk_factors *factors;
++ struct clk_gate *gate = NULL;
++ struct clk_mux *mux = NULL;
++ struct clk_hw *gate_hw = NULL;
++ struct clk_hw *mux_hw = NULL;
+ const char *clk_name = node->name;
+- const char *parent;
++ const char *parents[SUNXI_MAX_PARENTS];
+ void *reg;
++ int i = 0;
+
+ reg = of_iomap(node, 0);
+
+- parent = of_clk_get_parent_name(node, 0);
++ /* if we have a mux, we will have >1 parents */
++ while (i < SUNXI_MAX_PARENTS &&
++ (parents[i] = of_clk_get_parent_name(node, i)) != NULL)
++ i++;
++
++ factors = kzalloc(sizeof(struct clk_factors), GFP_KERNEL);
++ if (!factors)
++ return;
++
++ /* Add a gate if this factor clock can be gated */
++ if (data->enable) {
++ gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL);
++ if (!gate) {
++ kfree(factors);
++ return;
++ }
++
++ /* set up gate properties */
++ gate->reg = reg;
++ gate->bit_idx = data->enable;
++ gate->lock = &clk_lock;
++ gate_hw = &gate->hw;
++ }
++
++ /* Add a mux if this factor clock can be muxed */
++ if (data->mux) {
++ mux = kzalloc(sizeof(struct clk_mux), GFP_KERNEL);
++ if (!mux) {
++ kfree(factors);
++ kfree(gate);
++ return;
++ }
++
++ /* set up gate properties */
++ mux->reg = reg;
++ mux->shift = data->mux;
++ mux->mask = SUNXI_FACTORS_MUX_MASK;
++ mux->lock = &clk_lock;
++ mux_hw = &mux->hw;
++ }
++
++ /* set up factors properties */
++ factors->reg = reg;
++ factors->config = data->table;
++ factors->get_factors = data->getter;
++ factors->lock = &clk_lock;
+
+- clk = clk_register_factors(NULL, clk_name, parent, 0, reg,
+- data->table, data->getter, &clk_lock);
++ clk = clk_register_composite(NULL, clk_name,
++ parents, i,
++ mux_hw, &clk_mux_ops,
++ &factors->hw, &clk_factors_ops,
++ gate_hw, &clk_gate_ops,
++ i ? 0 : CLK_IS_ROOT);
+
+ if (!IS_ERR(clk)) {
+ of_clk_add_provider(node, of_clk_src_simple_get, clk);
+--
+1.8.5.1
+
generated by cgit v1.1 at 2024-07-01 13:40:46 +0000