[PATCH v2 09/10] clk: qcom: Add .is_enabled ops for clk-alpha-pll

Rajendra Nayak
2016-08-11T08:43:32Z

This would be useful in subsequent patches when the .set_rate operation
would need to identify if the PLL is actually enabled

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
---
drivers/clk/qcom/clk-alpha-pll.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index 854487e..2184dc1 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -198,6 +198,23 @@ static void clk_alpha_pll_hwfsm_disable(struct clk_hw *hw)
wait_for_pll_disable(pll, PLL_ACTIVE_FLAG);
}

+static int clk_alpha_pll_is_enabled(struct clk_hw *hw)
+{
+ int ret;
+ u32 val, off;
+ struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+
+ off = pll->offset;
+ ret = regmap_read(pll->clkr.regmap, off + PLL_MODE, &val);
+ if (ret)
+ return ret;
+
+ if (val & PLL_LOCK_DET)
+ return 1;
+ else
+ return 0;
+}
+
static int clk_alpha_pll_enable(struct clk_hw *hw)
{
int ret;
@@ -398,6 +415,7 @@ static long clk_alpha_pll_round_rate(struct clk_hw *hw, unsigned long rate,
const struct clk_ops clk_alpha_pll_ops = {
.enable = clk_alpha_pll_enable,
.disable = clk_alpha_pll_disable,
+ .is_enabled = clk_alpha_pll_is_enabled,
.recalc_rate = clk_alpha_pll_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
.set_rate = clk_alpha_pll_set_rate,
--
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