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.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/cs35l41.h

@@ -538,7 +538,6 @@
 #define CS35L41_OTP_SIZE_WORDS		32
 #define CS35L41_NUM_OTP_ELEM		100
 
-#define CS35L41_VALID_PDATA		0x80000000
 #define CS35L41_NUM_SUPPLIES            2
 
 #define CS35L41_SCLK_MSTR_MASK		0x10
@@ -753,12 +752,14 @@ enum cs35l41_gpio2_func {
 };
 
 struct cs35l41_gpio_cfg {
+	bool valid;
 	bool pol_inv;
 	bool out_en;
 	unsigned int func;
 };
 
 struct cs35l41_hw_cfg {
+	bool valid;
 	int bst_ind;
 	int bst_ipk;
 	int bst_cap;

sound/pci/hda/cs35l41_hda.c

@@ -219,14 +219,18 @@ static int cs35l41_hda_apply_properties(struct cs35l41_hda *cs35l41)
 	bool internal_boost = false;
 	int ret;
 
+	if (!cs35l41->hw_cfg.valid)
+		return -EINVAL;
+
 	if (hw_cfg->vspk_always_on) {
 		cs35l41->reg_seq = &cs35l41_hda_reg_seq_no_bst;
 		return 0;
 	}
 
-	if (hw_cfg->bst_ind || hw_cfg->bst_cap || hw_cfg->bst_ipk)
+	if (hw_cfg->bst_ind > 0 || hw_cfg->bst_cap > 0 || hw_cfg->bst_ipk > 0)
 		internal_boost = true;
 
+	if (hw_cfg->gpio1.valid) {
 		switch (hw_cfg->gpio1.func) {
 		case CS35L41_NOT_USED:
 			break;
@@ -239,10 +243,13 @@ static int cs35l41_hda_apply_properties(struct cs35l41_hda *cs35l41)
 					   CS35L41_GPIO1_CTRL_MASK, 2 << CS35L41_GPIO1_CTRL_SHIFT);
 			break;
 		default:
-		dev_err(cs35l41->dev, "Invalid function %d for GPIO1\n", hw_cfg->gpio1.func);
+			dev_err(cs35l41->dev, "Invalid function %d for GPIO1\n",
+				hw_cfg->gpio1.func);
 			return -EINVAL;
 		}
+	}
 
+	if (hw_cfg->gpio2.valid) {
 		switch (hw_cfg->gpio2.func) {
 		case CS35L41_NOT_USED:
 			break;
@@ -251,14 +258,13 @@ static int cs35l41_hda_apply_properties(struct cs35l41_hda *cs35l41)
 					   CS35L41_GPIO2_CTRL_MASK, 2 << CS35L41_GPIO2_CTRL_SHIFT);
 			break;
 		default:
-		dev_err(cs35l41->dev, "Invalid function %d for GPIO2\n", hw_cfg->gpio2.func);
+			dev_err(cs35l41->dev, "Invalid GPIO2 function %d\n", hw_cfg->gpio2.func);
 			return -EINVAL;
 		}
+	}
 
 	if (internal_boost) {
 		cs35l41->reg_seq = &cs35l41_hda_reg_seq_int_bst;
-		if (!(hw_cfg->bst_ind && hw_cfg->bst_cap && hw_cfg->bst_ipk))
-			return -EINVAL;
 		ret = cs35l41_boost_config(cs35l41->dev, cs35l41->regmap,
 					   hw_cfg->bst_ind, hw_cfg->bst_cap, hw_cfg->bst_ipk);
 		if (ret)
@@ -334,28 +340,37 @@ static int cs35l41_hda_read_acpi(struct cs35l41_hda *cs35l41, const char *hid, i
 	if (ret)
 		goto err;
 	hw_cfg->gpio1.func = values[cs35l41->index];
+	hw_cfg->gpio1.valid = true;
 
 	property = "cirrus,gpio2-func";
 	ret = device_property_read_u32_array(physdev, property, values, nval);
 	if (ret)
 		goto err;
 	hw_cfg->gpio2.func = values[cs35l41->index];
+	hw_cfg->gpio2.valid = true;
 
 	property = "cirrus,boost-peak-milliamp";
 	ret = device_property_read_u32_array(physdev, property, values, nval);
 	if (ret == 0)
 		hw_cfg->bst_ipk = values[cs35l41->index];
+	else
+		hw_cfg->bst_ipk = -1;
 
 	property = "cirrus,boost-ind-nanohenry";
 	ret = device_property_read_u32_array(physdev, property, values, nval);
 	if (ret == 0)
 		hw_cfg->bst_ind = values[cs35l41->index];
+	else
+		hw_cfg->bst_ind = -1;
 
 	property = "cirrus,boost-cap-microfarad";
 	ret = device_property_read_u32_array(physdev, property, values, nval);
 	if (ret == 0)
 		hw_cfg->bst_cap = values[cs35l41->index];
+	else
+		hw_cfg->bst_cap = -1;
 
+	hw_cfg->valid = true;
 	put_device(physdev);
 
 	return 0;
@@ -381,6 +396,7 @@ static int cs35l41_hda_read_acpi(struct cs35l41_hda *cs35l41, const char *hid, i
 	cs35l41->index = id == 0x40 ? 0 : 1;
 	cs35l41->reset_gpio = gpiod_get_index(physdev, NULL, 0, GPIOD_OUT_HIGH);
 	cs35l41->hw_cfg.vspk_always_on = true;
+	cs35l41->hw_cfg.valid = true;
 	put_device(physdev);
 
 	return 0;

sound/soc/codecs/cs35l41-lib.c

@@ -992,10 +992,20 @@ int cs35l41_boost_config(struct device *dev, struct regmap *regmap, int boost_in
 	case 101 ... 200:
 		bst_cbst_range = 3;
 		break;
-	default:	/* 201 uF and greater */
+	default:
+		if (boost_cap < 0) {
+			dev_err(dev, "Invalid boost capacitor value: %d nH\n", boost_cap);
+			return -EINVAL;
+		}
+		/* 201 uF and greater */
 		bst_cbst_range = 4;
 	}
 
+	if (boost_ipk < 1600 || boost_ipk > 4500) {
+		dev_err(dev, "Invalid boost inductor peak current: %d mA\n", boost_ipk);
+		return -EINVAL;
+	}
+
 	ret = regmap_update_bits(regmap, CS35L41_BSTCVRT_COEFF,
 				 CS35L41_BST_K1_MASK | CS35L41_BST_K2_MASK,
 				 cs35l41_bst_k1_table[bst_lbst_val][bst_cbst_range]
@@ -1017,10 +1027,6 @@ int cs35l41_boost_config(struct device *dev, struct regmap *regmap, int boost_in
 		return ret;
 	}
 
-	if (boost_ipk < 1600 || boost_ipk > 4500) {
-		dev_err(dev, "Invalid boost inductor peak current: %d mA\n", boost_ipk);
-		return -EINVAL;
-	}
 	bst_ipk_scaled = ((boost_ipk - 1600) / 50) + 0x10;
 
 	ret = regmap_update_bits(regmap, CS35L41_BSTCVRT_PEAK_CUR, CS35L41_BST_IPK_MASK,

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 */
+	if (!hw_cfg->valid)
+		return -EINVAL;
+
 	/* 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);
+	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;
 	}
-	} else {
-		dev_err(cs35l41->dev, "Incomplete Boost component DT config\n");
-		return -EINVAL;
-	}
 
 	/* 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);
 
+	if (gpio1->valid)
 		regmap_update_bits(cs35l41->regmap, CS35L41_GPIO_PAD_CONTROL,
-			   CS35L41_GPIO1_CTRL_MASK | CS35L41_GPIO2_CTRL_MASK,
-			   gpio1->func << CS35L41_GPIO1_CTRL_SHIFT |
+				   CS35L41_GPIO1_CTRL_MASK,
+				   gpio1->func << CS35L41_GPIO1_CTRL_SHIFT);
+
+	if (gpio2->valid) {
+		regmap_update_bits(cs35l41->regmap, CS35L41_GPIO_PAD_CONTROL,
+				   CS35L41_GPIO2_CTRL_MASK,
 				   gpio2->func << CS35L41_GPIO2_CTRL_SHIFT);
 
-	if ((gpio2->func == (CS35L41_GPIO2_INT_PUSH_PULL_LOW | CS35L41_VALID_PDATA)) ||
-		(gpio2->func == (CS35L41_GPIO2_INT_OPEN_DRAIN | CS35L41_VALID_PDATA)))
+		switch (gpio2->func) {
+		case CS35L41_GPIO2_INT_PUSH_PULL_LOW:
+		case CS35L41_GPIO2_INT_OPEN_DRAIN:
 			irq_pol = IRQF_TRIGGER_LOW;
-	else if (gpio2->func == (CS35L41_GPIO2_INT_PUSH_PULL_HIGH | CS35L41_VALID_PDATA))
+			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;
 }