mfd: pm8xxx-misc: Add API to control HSED BIAS lines
Qualcomm PMIC's support 3 HSED BIAS lines which as used
as Micrphone bias. The API adds ability to control (enable/disable)
these bias lines.
CRs-Fixed: 359206
Change-Id: If7603028bb040c3679c042307b8950bbd3f12c4d
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
diff --git a/drivers/mfd/pm8xxx-misc.c b/drivers/mfd/pm8xxx-misc.c
index a311029..080a87c 100644
--- a/drivers/mfd/pm8xxx-misc.c
+++ b/drivers/mfd/pm8xxx-misc.c
@@ -145,6 +145,11 @@
#define MP3_1_SHIFT 5
#define MP3_2_SHIFT 2
+#define REG_HSED_BIAS0_CNTL2 0xA1
+#define REG_HSED_BIAS1_CNTL2 0x135
+#define REG_HSED_BIAS2_CNTL2 0x138
+#define HSED_EN_MASK 0xC0
+
struct pm8xxx_misc_chip {
struct list_head link;
struct pm8xxx_misc_platform_data pdata;
@@ -1100,6 +1105,52 @@
}
EXPORT_SYMBOL_GPL(pm8xxx_aux_clk_control);
+int pm8xxx_hsed_bias_control(enum pm8xxx_hsed_bias bias, bool enable)
+{
+ struct pm8xxx_misc_chip *chip;
+ unsigned long flags;
+ int rc = 0;
+ u16 addr;
+
+ switch (bias) {
+ case PM8XXX_HSED_BIAS0:
+ addr = REG_HSED_BIAS0_CNTL2;
+ break;
+ case PM8XXX_HSED_BIAS1:
+ addr = REG_HSED_BIAS1_CNTL2;
+ break;
+ case PM8XXX_HSED_BIAS2:
+ addr = REG_HSED_BIAS2_CNTL2;
+ break;
+ default:
+ pr_err("Invalid BIAS line\n");
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&pm8xxx_misc_chips_lock, flags);
+
+ /* Loop over all attached PMICs and call specific functions for them. */
+ list_for_each_entry(chip, &pm8xxx_misc_chips, link) {
+ switch (chip->version) {
+ case PM8XXX_VERSION_8058:
+ case PM8XXX_VERSION_8921:
+ rc = pm8xxx_misc_masked_write(chip, addr,
+ HSED_EN_MASK, enable ? HSED_EN_MASK : 0);
+ if (rc < 0)
+ pr_err("Enable HSED BIAS failed rc=%d\n", rc);
+ break;
+ default:
+ /* Functionality not supported */
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&pm8xxx_misc_chips_lock, flags);
+
+ return rc;
+}
+EXPORT_SYMBOL(pm8xxx_hsed_bias_control);
+
static int __devinit pm8xxx_misc_probe(struct platform_device *pdev)
{
const struct pm8xxx_misc_platform_data *pdata = pdev->dev.platform_data;
diff --git a/include/linux/mfd/pm8xxx/misc.h b/include/linux/mfd/pm8xxx/misc.h
index 77683ce..c4b0ea4 100644
--- a/include/linux/mfd/pm8xxx/misc.h
+++ b/include/linux/mfd/pm8xxx/misc.h
@@ -89,6 +89,12 @@
XO_DIV_64,
};
+enum pm8xxx_hsed_bias {
+ PM8XXX_HSED_BIAS0,
+ PM8XXX_HSED_BIAS1,
+ PM8XXX_HSED_BIAS2,
+};
+
#if defined(CONFIG_MFD_PM8XXX_MISC) || defined(CONFIG_MFD_PM8XXX_MISC_MODULE)
/**
@@ -210,6 +216,14 @@
enum pm8xxx_aux_clk_div divider,
bool enable);
+/**
+ * pm8xxx_hsed_bias_control - Control the HSED_BIAS signal
+ * @bias: the bias line to be controlled (of the 3)
+ * @enable: enable/disable the bias line
+ *
+ * RETURNS: an appropriate -ERRNO error value on error, or zero for success.
+ */
+int pm8xxx_hsed_bias_control(enum pm8xxx_hsed_bias bias, bool enable);
#else
static inline int pm8xxx_reset_pwr_off(int reset)
@@ -259,6 +273,11 @@
{
return -ENODEV;
}
+static inline int pm8xxx_hsed_bias_control(enum pm8xxx_hsed_bias bias,
+ bool enable)
+{
+ return -ENODEV;
+}
#endif