ALSA: cs35l41: Check hw_config before using it

The driver can receive an empty hw_config, so mark as valid if
successfully read from device tree/ACPI or set by the driver itself.
Platforms not marked with a valid hw config will not be supported.

Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220413083728.10730-3-tanureal@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 48 insertions, 28 deletions

diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c
index e76b93c15106..90dec80707ea 100644
--- a/sound/soc/codecs/cs35l41.c
+++ b/sound/soc/codecs/cs35l41.c
@@ -995,28 +995,24 @@ static int cs35l41_dai_set_sysclk(struct snd_soc_dai *dai,
 
 static int cs35l41_set_pdata(struct cs35l41_private *cs35l41)
 {
+	struct cs35l41_hw_cfg *hw_cfg = &cs35l41->hw_cfg;
 	int ret;
 
-	/* Set Platform Data */
-	/* Required */
-	if (cs35l41->hw_cfg.bst_ipk &&
-	    cs35l41->hw_cfg.bst_ind && cs35l41->hw_cfg.bst_cap) {
-		ret = cs35l41_boost_config(cs35l41->dev, cs35l41->regmap, cs35l41->hw_cfg.bst_ind,
-					   cs35l41->hw_cfg.bst_cap, cs35l41->hw_cfg.bst_ipk);
-		if (ret) {
-			dev_err(cs35l41->dev, "Error in Boost DT config: %d\n", ret);
-			return ret;
-		}
-	} else {
-		dev_err(cs35l41->dev, "Incomplete Boost component DT config\n");
+	if (!hw_cfg->valid)
 		return -EINVAL;
+
+	/* Required */
+	ret = cs35l41_boost_config(cs35l41->dev, cs35l41->regmap,
+				   hw_cfg->bst_ind, hw_cfg->bst_cap, hw_cfg->bst_ipk);
+	if (ret) {
+		dev_err(cs35l41->dev, "Error in Boost DT config: %d\n", ret);
+		return ret;
 	}
 
 	/* Optional */
-	if (cs35l41->hw_cfg.dout_hiz <= CS35L41_ASP_DOUT_HIZ_MASK &&
-	    cs35l41->hw_cfg.dout_hiz >= 0)
+	if (hw_cfg->dout_hiz <= CS35L41_ASP_DOUT_HIZ_MASK && hw_cfg->dout_hiz >= 0)
 		regmap_update_bits(cs35l41->regmap, CS35L41_SP_HIZ_CTRL, CS35L41_ASP_DOUT_HIZ_MASK,
-				   cs35l41->hw_cfg.dout_hiz);
+				   hw_cfg->dout_hiz);
 
 	return 0;
 }
@@ -1037,16 +1033,28 @@ static int cs35l41_gpio_config(struct cs35l41_private *cs35l41)
 			   gpio2->pol_inv << CS35L41_GPIO_POL_SHIFT |
 			   !gpio2->out_en << CS35L41_GPIO_DIR_SHIFT);
 
-	regmap_update_bits(cs35l41->regmap, CS35L41_GPIO_PAD_CONTROL,
-			   CS35L41_GPIO1_CTRL_MASK | CS35L41_GPIO2_CTRL_MASK,
-			   gpio1->func << CS35L41_GPIO1_CTRL_SHIFT |
-			   gpio2->func << CS35L41_GPIO2_CTRL_SHIFT);
+	if (gpio1->valid)
+		regmap_update_bits(cs35l41->regmap, CS35L41_GPIO_PAD_CONTROL,
+				   CS35L41_GPIO1_CTRL_MASK,
+				   gpio1->func << CS35L41_GPIO1_CTRL_SHIFT);
 
-	if ((gpio2->func == (CS35L41_GPIO2_INT_PUSH_PULL_LOW | CS35L41_VALID_PDATA)) ||
-		(gpio2->func == (CS35L41_GPIO2_INT_OPEN_DRAIN | CS35L41_VALID_PDATA)))
-		irq_pol = IRQF_TRIGGER_LOW;
-	else if (gpio2->func == (CS35L41_GPIO2_INT_PUSH_PULL_HIGH | CS35L41_VALID_PDATA))
-		irq_pol = IRQF_TRIGGER_HIGH;
+	if (gpio2->valid) {
+		regmap_update_bits(cs35l41->regmap, CS35L41_GPIO_PAD_CONTROL,
+				   CS35L41_GPIO2_CTRL_MASK,
+				   gpio2->func << CS35L41_GPIO2_CTRL_SHIFT);
+
+		switch (gpio2->func) {
+		case CS35L41_GPIO2_INT_PUSH_PULL_LOW:
+		case CS35L41_GPIO2_INT_OPEN_DRAIN:
+			irq_pol = IRQF_TRIGGER_LOW;
+			break;
+		case CS35L41_GPIO2_INT_PUSH_PULL_HIGH:
+			irq_pol = IRQF_TRIGGER_HIGH;
+			break;
+		default:
+			break;
+		}
+	}
 
 	return irq_pol;
 }
@@ -1121,14 +1129,20 @@ static int cs35l41_handle_pdata(struct device *dev, struct cs35l41_hw_cfg *hw_cf
 	ret = device_property_read_u32(dev, "cirrus,boost-peak-milliamp", &val);
 	if (ret >= 0)
 		hw_cfg->bst_ipk = val;
+	else
+		hw_cfg->bst_ipk = -1;
 
 	ret = device_property_read_u32(dev, "cirrus,boost-ind-nanohenry", &val);
 	if (ret >= 0)
 		hw_cfg->bst_ind = val;
+	else
+		hw_cfg->bst_ind = -1;
 
 	ret = device_property_read_u32(dev, "cirrus,boost-cap-microfarad", &val);
 	if (ret >= 0)
 		hw_cfg->bst_cap = val;
+	else
+		hw_cfg->bst_cap = -1;
 
 	ret = device_property_read_u32(dev, "cirrus,asp-sdout-hiz", &val);
 	if (ret >= 0)
@@ -1140,15 +1154,21 @@ static int cs35l41_handle_pdata(struct device *dev, struct cs35l41_hw_cfg *hw_cf
 	gpio1->pol_inv = device_property_read_bool(dev, "cirrus,gpio1-polarity-invert");
 	gpio1->out_en = device_property_read_bool(dev, "cirrus,gpio1-output-enable");
 	ret = device_property_read_u32(dev, "cirrus,gpio1-src-select", &val);
-	if (ret >= 0)
-		gpio1->func = val | CS35L41_VALID_PDATA;
+	if (ret >= 0) {
+		gpio1->func = val;
+		gpio1->valid = true;
+	}
 
 	/* GPIO2 Pin Config */
 	gpio2->pol_inv = device_property_read_bool(dev, "cirrus,gpio2-polarity-invert");
 	gpio2->out_en = device_property_read_bool(dev, "cirrus,gpio2-output-enable");
 	ret = device_property_read_u32(dev, "cirrus,gpio2-src-select", &val);
-	if (ret >= 0)
-		gpio2->func = val | CS35L41_VALID_PDATA;
+	if (ret >= 0) {
+		gpio2->func = val;
+		gpio2->valid = true;
+	}
+
+	hw_cfg->valid = true;
 
 	return 0;
 }