}
}
+static int meson_clk_pll_is_enabled(struct clk_hw *hw)
+{
+ struct clk_regmap *clk = to_clk_regmap(hw);
+ struct meson_clk_pll_data *pll = meson_clk_pll_data(clk);
+
+ if (meson_parm_read(clk->map, &pll->rst) ||
+ !meson_parm_read(clk->map, &pll->en) ||
+ !meson_parm_read(clk->map, &pll->l))
+ return 0;
+
+ return 1;
+}
+
static int meson_clk_pll_enable(struct clk_hw *hw)
{
struct clk_regmap *clk = to_clk_regmap(hw);
struct meson_clk_pll_data *pll = meson_clk_pll_data(clk);
+ /* do nothing if the PLL is already enabled */
+ if (clk_hw_is_enabled(hw))
+ return 0;
+
/* Make sure the pll is in reset */
meson_parm_write(clk->map, &pll->rst, 1);
.recalc_rate = meson_clk_pll_recalc_rate,
.round_rate = meson_clk_pll_round_rate,
.set_rate = meson_clk_pll_set_rate,
+ .is_enabled = meson_clk_pll_is_enabled,
.enable = meson_clk_pll_enable,
.disable = meson_clk_pll_disable
};
const struct clk_ops meson_clk_pll_ro_ops = {
.recalc_rate = meson_clk_pll_recalc_rate,
+ .is_enabled = meson_clk_pll_is_enabled,
};