[PATCH v2 04/10] clk: qcom: Add support for PLLs with alpha mode

Rajendra Nayak
2016-08-11T08:44:38Z

Some PLLs can support an alpha mode, and a single alpha
register (instead of registers to program the M/N values),
the contents of which depend on the alpha mode selected.
(They are either treated as two's complement or M/N value)
Add support for this in the clk PLL driver.

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
---
drivers/clk/qcom/clk-pll.c | 8 ++++++--
drivers/clk/qcom/clk-pll.h | 2 ++
2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/clk-pll.c b/drivers/clk/qcom/clk-pll.c
index 5b940d6..08d2fa2 100644
--- a/drivers/clk/qcom/clk-pll.c
+++ b/drivers/clk/qcom/clk-pll.c
@@ -255,8 +255,12 @@ static void clk_pll_configure(struct clk_pll *pll, struct regmap *regmap,
u32 mask;

regmap_write(regmap, pll->l_reg, config->l);
- regmap_write(regmap, pll->m_reg, config->m);
- regmap_write(regmap, pll->n_reg, config->n);
+ if (pll->alpha_reg) {
+ regmap_write(regmap, pll->alpha_reg, config->alpha);
+ } else {
+ regmap_write(regmap, pll->m_reg, config->m);
+ regmap_write(regmap, pll->n_reg, config->n);
+ }

val = config->vco_val;
val |= config->pre_div_val;
diff --git a/drivers/clk/qcom/clk-pll.h b/drivers/clk/qcom/clk-pll.h
index ffd0c63..083727e 100644
--- a/drivers/clk/qcom/clk-pll.h
+++ b/drivers/clk/qcom/clk-pll.h
@@ -48,6 +48,7 @@ struct clk_pll {
u32 l_reg;
u32 m_reg;
u32 n_reg;
+ u32 alpha_reg;
u32 config_reg;
u32 mode_reg;
u32 status_reg;
@@ -70,6 +71,7 @@ struct pll_config {
u16 l;
u32 m;
u32 n;
+ u32 alpha;
u32 vco_val;
u32 vco_mask;
u32 pre_div_val;
--
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