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authorJun Nie <jun.nie@linaro.org>2016-09-06 14:02:41 +0800
committerStephen Boyd <sboyd@codeaurora.org>2016-09-14 13:48:32 -0700
commit8d9a0860b75525e3cf240bc152bfdeaeb2e562a1 (patch)
tree7e3ee13a267085c5ba5869e3ed5af020de2481aa /drivers/clk/zte
parent6e2e7c9fdae316bfb2724d2dbf230678d3f09092 (diff)
downloadlinux-8d9a0860b75525e3cf240bc152bfdeaeb2e562a1.tar.bz2
clk: zx: reform pll config info to ease code extension
Add power down bit and pll lock bit in pll config structure to ease new SoC support. Signed-off-by: Jun Nie <jun.nie@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/zte')
-rw-r--r--drivers/clk/zte/clk.c21
-rw-r--r--drivers/clk/zte/clk.h4
2 files changed, 16 insertions, 9 deletions
diff --git a/drivers/clk/zte/clk.c b/drivers/clk/zte/clk.c
index 7c73c538c43d..c4c1251bc1e7 100644
--- a/drivers/clk/zte/clk.c
+++ b/drivers/clk/zte/clk.c
@@ -21,8 +21,8 @@
#define to_clk_zx_audio(_hw) container_of(_hw, struct clk_zx_audio, hw)
#define CFG0_CFG1_OFFSET 4
-#define LOCK_FLAG BIT(30)
-#define POWER_DOWN BIT(31)
+#define LOCK_FLAG 30
+#define POWER_DOWN 31
static int rate_to_idx(struct clk_zx_pll *zx_pll, unsigned long rate)
{
@@ -50,8 +50,8 @@ static int hw_to_idx(struct clk_zx_pll *zx_pll)
hw_cfg1 = readl_relaxed(zx_pll->reg_base + CFG0_CFG1_OFFSET);
/* For matching the value in lookup table */
- hw_cfg0 &= ~LOCK_FLAG;
- hw_cfg0 |= POWER_DOWN;
+ hw_cfg0 &= ~BIT(zx_pll->lock_bit);
+ hw_cfg0 |= BIT(zx_pll->pd_bit);
for (i = 0; i < zx_pll->count; i++) {
if (hw_cfg0 == config[i].cfg0 && hw_cfg1 == config[i].cfg1)
@@ -108,10 +108,10 @@ static int zx_pll_enable(struct clk_hw *hw)
u32 reg;
reg = readl_relaxed(zx_pll->reg_base);
- writel_relaxed(reg & ~POWER_DOWN, zx_pll->reg_base);
+ writel_relaxed(reg & ~BIT(zx_pll->pd_bit), zx_pll->reg_base);
return readl_relaxed_poll_timeout(zx_pll->reg_base, reg,
- reg & LOCK_FLAG, 0, 100);
+ reg & BIT(zx_pll->lock_bit), 0, 100);
}
static void zx_pll_disable(struct clk_hw *hw)
@@ -120,7 +120,7 @@ static void zx_pll_disable(struct clk_hw *hw)
u32 reg;
reg = readl_relaxed(zx_pll->reg_base);
- writel_relaxed(reg | POWER_DOWN, zx_pll->reg_base);
+ writel_relaxed(reg | BIT(zx_pll->pd_bit), zx_pll->reg_base);
}
static int zx_pll_is_enabled(struct clk_hw *hw)
@@ -130,10 +130,10 @@ static int zx_pll_is_enabled(struct clk_hw *hw)
reg = readl_relaxed(zx_pll->reg_base);
- return !(reg & POWER_DOWN);
+ return !(reg & BIT(zx_pll->pd_bit));
}
-static const struct clk_ops zx_pll_ops = {
+const struct clk_ops zx_pll_ops = {
.recalc_rate = zx_pll_recalc_rate,
.round_rate = zx_pll_round_rate,
.set_rate = zx_pll_set_rate,
@@ -141,6 +141,7 @@ static const struct clk_ops zx_pll_ops = {
.disable = zx_pll_disable,
.is_enabled = zx_pll_is_enabled,
};
+EXPORT_SYMBOL(zx_pll_ops);
struct clk *clk_register_zx_pll(const char *name, const char *parent_name,
unsigned long flags, void __iomem *reg_base,
@@ -164,6 +165,8 @@ struct clk *clk_register_zx_pll(const char *name, const char *parent_name,
zx_pll->reg_base = reg_base;
zx_pll->lookup_table = lookup_table;
zx_pll->count = count;
+ zx_pll->lock_bit = LOCK_FLAG;
+ zx_pll->pd_bit = POWER_DOWN;
zx_pll->lock = lock;
zx_pll->hw.init = &init;
diff --git a/drivers/clk/zte/clk.h b/drivers/clk/zte/clk.h
index 65ae08b818d3..8f6b5f05bb7f 100644
--- a/drivers/clk/zte/clk.h
+++ b/drivers/clk/zte/clk.h
@@ -24,6 +24,8 @@ struct clk_zx_pll {
const struct zx_pll_config *lookup_table; /* order by rate asc */
int count;
spinlock_t *lock;
+ u8 pd_bit; /* power down bit */
+ u8 lock_bit; /* pll lock flag bit */
};
struct clk *clk_register_zx_pll(const char *name, const char *parent_name,
@@ -38,4 +40,6 @@ struct clk_zx_audio {
struct clk *clk_register_zx_audio(const char *name,
const char * const parent_name,
unsigned long flags, void __iomem *reg_base);
+
+extern const struct clk_ops zx_pll_ops;
#endif