#include <linux/of.h>
#include <linux/of_address.h>
+struct clkgen_data {
+ unsigned long flags;
+ bool mode;
+};
+
struct flexgen {
struct clk_hw hw;
struct clk_gate fgate;
/* Final divisor */
struct clk_divider fdiv;
+ /* Asynchronous mode control */
+ struct clk_gate sync;
+ /* hw control flags */
+ bool control_mode;
};
#define to_flexgen(_hw) container_of(_hw, struct flexgen, hw)
+#define to_clk_gate(_hw) container_of(_hw, struct clk_gate, hw)
static int flexgen_enable(struct clk_hw *hw)
{
struct flexgen *flexgen = to_flexgen(hw);
struct clk_hw *pdiv_hw = &flexgen->pdiv.hw;
struct clk_hw *fdiv_hw = &flexgen->fdiv.hw;
+ struct clk_hw *sync_hw = &flexgen->sync.hw;
+ struct clk_gate *config = to_clk_gate(sync_hw);
unsigned long div = 0;
int ret = 0;
+ u32 reg;
__clk_hw_set_clk(pdiv_hw, hw);
__clk_hw_set_clk(fdiv_hw, hw);
+ if (flexgen->control_mode) {
+ reg = readl(config->reg);
+ reg &= ~BIT(config->bit_idx);
+ writel(reg, config->reg);
+ }
+
div = clk_best_div(parent_rate, rate);
/*
static struct clk *clk_register_flexgen(const char *name,
const char **parent_names, u8 num_parents,
void __iomem *reg, spinlock_t *lock, u32 idx,
- unsigned long flexgen_flags) {
+ unsigned long flexgen_flags, bool mode) {
struct flexgen *fgxbar;
struct clk *clk;
struct clk_init_data init;
fgxbar->fdiv.reg = fdiv_reg;
fgxbar->fdiv.width = 6;
+ /* Final divider sync config */
+ fgxbar->sync.lock = lock;
+ fgxbar->sync.reg = fdiv_reg;
+ fgxbar->sync.bit_idx = 7;
+
+ fgxbar->control_mode = mode;
+
fgxbar->hw.init = &init;
clk = clk_register(NULL, &fgxbar->hw);
return parents;
}
+static const struct clkgen_data clkgen_audio = {
+ .flags = CLK_SET_RATE_PARENT,
+};
+
+static const struct clkgen_data clkgen_video = {
+ .flags = CLK_SET_RATE_PARENT,
+ .mode = 1,
+};
+
+static const struct of_device_id flexgen_of_match[] = {
+ {
+ .compatible = "st,flexgen-audio",
+ .data = &clkgen_audio,
+ },
+ {
+ .compatible = "st,flexgen-video",
+ .data = &clkgen_video,
+ },
+ {}
+};
+
static void __init st_of_flexgen_setup(struct device_node *np)
{
struct device_node *pnode;
const char **parents;
int num_parents, i;
spinlock_t *rlock = NULL;
+ const struct of_device_id *match;
+ struct clkgen_data *data = NULL;
+ unsigned long flex_flags = 0;
int ret;
+ bool clk_mode = 0;
pnode = of_get_parent(np);
if (!pnode)
if (!parents)
return;
+ match = of_match_node(flexgen_of_match, np);
+ if (match) {
+ data = (struct clkgen_data *)match->data;
+ flex_flags = data->flags;
+ clk_mode = data->mode;
+ }
+
clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
if (!clk_data)
goto err;
for (i = 0; i < clk_data->clk_num; i++) {
struct clk *clk;
const char *clk_name;
- unsigned long flex_flags = 0;
if (of_property_read_string_index(np, "clock-output-names",
i, &clk_name)) {
continue;
clk = clk_register_flexgen(clk_name, parents, num_parents,
- reg, rlock, i, flex_flags);
+ reg, rlock, i, flex_flags, clk_mode);
if (IS_ERR(clk))
goto err;