clk: qcom: Enable FSM mode for votable alpha PLLs

The votable alpha PLLs need to have the fsm mode enabled as part
of the initialization. The sequence seems to be the same as used
by clk-pll, so move the function which does this into a common
place and reuse it for the clk-alpha-pll

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c
index fffcbaf0fba7..6ec81bd92611 100644
--- a/drivers/clk/qcom/common.c
+++ b/drivers/clk/qcom/common.c
@@ -74,6 +74,27 @@ qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
 }
 EXPORT_SYMBOL_GPL(qcom_cc_map);
 
+void
+qcom_pll_set_fsm_mode(struct regmap *map, u32 reg, u8 bias_count, u8 lock_count)
+{
+	u32 val;
+	u32 mask;
+
+	/* De-assert reset to FSM */
+	regmap_update_bits(map, reg, PLL_VOTE_FSM_RESET, 0);
+
+	/* Program bias count and lock count */
+	val = bias_count << PLL_BIAS_COUNT_SHIFT |
+		lock_count << PLL_LOCK_COUNT_SHIFT;
+	mask = PLL_BIAS_COUNT_MASK << PLL_BIAS_COUNT_SHIFT;
+	mask |= PLL_LOCK_COUNT_MASK << PLL_LOCK_COUNT_SHIFT;
+	regmap_update_bits(map, reg, mask, val);
+
+	/* Enable PLL FSM voting */
+	regmap_update_bits(map, reg, PLL_VOTE_FSM_ENA, PLL_VOTE_FSM_ENA);
+}
+EXPORT_SYMBOL_GPL(qcom_pll_set_fsm_mode);
+
 static void qcom_cc_del_clk_provider(void *data)
 {
 	of_clk_del_provider(data);