soc: pinctrl-lpi: Add support for audio HM voting for bengal

On bengal target, audio core voting is not applicable.
Add support for audio HM voting in pinctrl-lpi driver.

Change-Id: I8661c981896c14899ca4d85f77507b417700b987
Signed-off-by: Laxminath Kasam <[email protected]>

soc/pinctrl-lpi.c

@@ -110,6 +110,7 @@ struct lpi_gpio_state {
 	struct gpio_chip     chip;
 	char __iomem        *base;
 	struct clk          *lpass_core_hw_vote;
+	struct clk          *lpass_audio_hw_vote;
 	struct mutex         slew_access_lock;
 	bool core_hw_vote_status;
 	struct mutex        core_hw_vote_lock;
@@ -616,6 +617,7 @@ static int lpi_pinctrl_probe(struct platform_device *pdev)
 	char __iomem *slew_base;
 	u32 reg, slew_reg;
 	struct clk *lpass_core_hw_vote = NULL;
+	struct clk *lpass_audio_hw_vote = NULL;
 
 	ret = of_property_read_u32(dev->of_node, "reg", &reg);
 	if (ret < 0) {
@@ -771,6 +773,17 @@ static int lpi_pinctrl_probe(struct platform_device *pdev)
 	}
 	state->lpass_core_hw_vote = lpass_core_hw_vote;
 
+	/* Register LPASS audio hw vote */
+	lpass_audio_hw_vote = devm_clk_get(&pdev->dev, "lpass_audio_hw_vote");
+	if (IS_ERR(lpass_audio_hw_vote)) {
+		ret = PTR_ERR(lpass_audio_hw_vote);
+		dev_dbg(&pdev->dev, "%s: clk get %s failed %d\n",
+			__func__, "lpass_audio_hw_vote", ret);
+		lpass_audio_hw_vote = NULL;
+		ret = 0;
+	}
+	state->lpass_audio_hw_vote = lpass_audio_hw_vote;
+
 	state->core_hw_vote_status = false;
 	pm_runtime_set_autosuspend_delay(&pdev->dev, LPI_AUTO_SUSPEND_DELAY);
 	pm_runtime_use_autosuspend(&pdev->dev);
@@ -817,14 +830,19 @@ int lpi_pinctrl_runtime_resume(struct device *dev)
 {
 	struct lpi_gpio_state *state = dev_get_drvdata(dev);
 	int ret = 0;
+	struct clk *hw_vote = state->lpass_core_hw_vote;
 
 	if (state->lpass_core_hw_vote == NULL) {
 		dev_dbg(dev, "%s: Invalid core hw node\n", __func__);
-		return 0;
+		if (state->lpass_audio_hw_vote == NULL) {
+			dev_dbg(dev, "%s: Invalid audio hw node\n", __func__);
+			return 0;
+		}
+		hw_vote = state->lpass_audio_hw_vote;
 	}
 
 	mutex_lock(&state->core_hw_vote_lock);
-	ret = clk_prepare_enable(state->lpass_core_hw_vote);
+	ret = clk_prepare_enable(hw_vote);
 	if (ret < 0) {
 		pm_runtime_set_autosuspend_delay(dev,
 						 LPI_AUTO_SUSPEND_DELAY_ERROR);
@@ -845,15 +863,20 @@ exit:
 int lpi_pinctrl_runtime_suspend(struct device *dev)
 {
 	struct lpi_gpio_state *state = dev_get_drvdata(dev);
+	struct clk *hw_vote = state->lpass_core_hw_vote;
 
 	if (state->lpass_core_hw_vote == NULL) {
 		dev_dbg(dev, "%s: Invalid core hw node\n", __func__);
-		return 0;
+		if (state->lpass_audio_hw_vote == NULL) {
+			dev_dbg(dev, "%s: Invalid audio hw node\n", __func__);
+			return 0;
+		}
+		hw_vote = state->lpass_audio_hw_vote;
 	}
 
 	mutex_lock(&state->core_hw_vote_lock);
 	if (state->core_hw_vote_status) {
-		clk_disable_unprepare(state->lpass_core_hw_vote);
+		clk_disable_unprepare(hw_vote);
 		state->core_hw_vote_status = false;
 	}
 	mutex_unlock(&state->core_hw_vote_lock);