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Subject[PATCH 4/5] mfd: arizona: Add micdet ranges and polarity device tree bindings
Date
Add device tree bindings for the pdata that configures the microphone
button detection and microphone detection polarity configurations.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
Documentation/devicetree/bindings/mfd/arizona.txt | 26 +++++
drivers/mfd/arizona-core.c | 116 +++++++++++++++++++++
2 files changed, 142 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/arizona.txt b/Documentation/devicetree/bindings/mfd/arizona.txt
index 3ee659d..09e384c 100644
--- a/Documentation/devicetree/bindings/mfd/arizona.txt
+++ b/Documentation/devicetree/bindings/mfd/arizona.txt
@@ -49,6 +49,20 @@ Optional properties:
milliseconds
- wlf,micd-force-micbias : Force MICBIAS continuously on during microphone
detection
+ - wlf,micd-ranges : Microphone detection level and key configuration, this
+ field can be of variable length but should always be a multiple of 2 cells
+ long, each two cell group represents one button configuration
+ The first cell is the maximum impedance for this button in ohms
+ The second cell the key that should be reported to the input layer
+ - wlf,micd-configs : Headset polarity configurations, the field can be of
+ variable length but should always be a multiple of 3 cells long, each two
+ cell group represents one polarity configration
+ The first cell is the accessory detection source as per the ACCDET_SRC bits
+ in the ACCESSORY_DETECT_MODE_1 register
+ The second cell represents the MICBIAS to be used as per the MICD_BIAS_SRC
+ bits in the MIC_DETECT_1 register
+ The third cell represents the value of the micd-pol-gpio pin, a non-zero
+ value indicates this should be on

- wlf,gpio-defaults : A list of GPIO configuration register values. If
absent, no configuration of these registers is performed. If any
@@ -79,6 +93,18 @@ codec: wm5102@1a {
wlf,micd-dbtime = <0x1>;
wlf,micd-timeout = <10>;
wlf,micd-force-micbias;
+ wlf,micd-ranges = <
+ 11 0x100
+ 28 0x101
+ 54 0x102
+ 100 0x103
+ 186 0x104
+ 430 0x105
+ >;
+ wlf,micd-configs = <
+ 0x1 1 0
+ 0x0 2 1
+ >;

wlf,gpio-defaults = <
0x00000000 /* AIF1TXLRCLK */
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 1cc6aa0..c8f30c4 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -596,6 +596,119 @@ static int arizona_of_get_gpio_defaults(struct arizona *arizona,
return ret;
}

+static int arizona_of_get_u32_num_groups(struct arizona *arizona,
+ const char *prop,
+ int group_size)
+{
+ int len_prop;
+ int num_groups;
+
+ if (!of_get_property(arizona->dev->of_node, prop, &len_prop))
+ return -EINVAL;
+
+ num_groups = len_prop / (group_size * sizeof(u32));
+
+ if (num_groups * group_size * sizeof(u32) != len_prop) {
+ dev_err(arizona->dev,
+ "DT property %s is malformed: %d\n",
+ prop, -EOVERFLOW);
+ return -EOVERFLOW;
+ }
+
+ return num_groups;
+}
+
+static int arizona_of_get_micd_ranges(struct arizona *arizona,
+ const char *prop)
+{
+ int nranges;
+ int i, j;
+ int ret = 0;
+ u32 value;
+ struct arizona_micd_range *micd_ranges;
+
+ nranges = arizona_of_get_u32_num_groups(arizona, prop, 2);
+ if (nranges < 0)
+ return nranges;
+
+ micd_ranges = devm_kzalloc(arizona->dev,
+ nranges * sizeof(struct arizona_micd_range),
+ GFP_KERNEL);
+
+ for (i = 0, j = 0; i < nranges; ++i) {
+ ret = of_property_read_u32_index(arizona->dev->of_node,
+ prop, j++, &value);
+ if (ret < 0)
+ goto error;
+ micd_ranges[i].max = value;
+
+ ret = of_property_read_u32_index(arizona->dev->of_node,
+ prop, j++, &value);
+ if (ret < 0)
+ goto error;
+ micd_ranges[i].key = value;
+ }
+
+ arizona->pdata.micd_ranges = micd_ranges;
+ arizona->pdata.num_micd_ranges = nranges;
+
+ return ret;
+
+error:
+ devm_kfree(arizona->dev, micd_ranges);
+ dev_err(arizona->dev, "DT property %s is malformed: %d\n", prop, ret);
+ return ret;
+}
+
+static int arizona_of_get_micd_configs(struct arizona *arizona,
+ const char *prop)
+{
+ int nconfigs;
+ int i, j;
+ int ret = 0;
+ u32 value;
+ struct arizona_micd_config *micd_configs;
+
+ nconfigs = arizona_of_get_u32_num_groups(arizona, prop, 3);
+ if (nconfigs < 0)
+ return nconfigs;
+
+ micd_configs = devm_kzalloc(arizona->dev,
+ nconfigs *
+ sizeof(struct arizona_micd_config),
+ GFP_KERNEL);
+
+ for (i = 0, j = 0; i < nconfigs; ++i) {
+ ret = of_property_read_u32_index(arizona->dev->of_node,
+ prop, j++, &value);
+ if (ret < 0)
+ goto error;
+ micd_configs[i].src = value;
+
+ ret = of_property_read_u32_index(arizona->dev->of_node,
+ prop, j++, &value);
+ if (ret < 0)
+ goto error;
+ micd_configs[i].bias = value;
+
+ ret = of_property_read_u32_index(arizona->dev->of_node,
+ prop, j++, &value);
+ if (ret < 0)
+ goto error;
+ micd_configs[i].gpio = value;
+ }
+
+ arizona->pdata.micd_configs = micd_configs;
+ arizona->pdata.num_micd_configs = nconfigs;
+
+ return ret;
+
+error:
+ devm_kfree(arizona->dev, micd_configs);
+ dev_err(arizona->dev, "DT property %s is malformed: %d\n", prop, ret);
+ return ret;
+}
+
static int arizona_of_get_core_pdata(struct arizona *arizona)
{
struct arizona_pdata *pdata = &arizona->pdata;
@@ -625,6 +738,9 @@ static int arizona_of_get_core_pdata(struct arizona *arizona)
of_property_read_bool(arizona->dev->of_node,
"wlf,micd-force-micbias");

+ arizona_of_get_micd_ranges(arizona, "wlf,micd-ranges");
+ arizona_of_get_micd_configs(arizona, "wlf,micd-configs");
+
arizona_of_get_gpio_defaults(arizona, "wlf,gpio-defaults");

arizona_of_read_u32_array(arizona, "wlf,max-channels-clocked",
--
1.7.2.5


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