2 files changed, 33 insertions, 0 deletions

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 1c32afed28aa..f162b68e78a8 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -552,6 +552,38 @@ int twl_get_version(void)
 }
 EXPORT_SYMBOL_GPL(twl_get_version);
 
+/**
+ * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
+ *
+ * Api to get the TWL HFCLK rate based on BOOT_CFG register.
+ */
+int twl_get_hfclk_rate(void)
+{
+        u8 ctrl;
+        int rate;
+
+        twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
+
+        switch (ctrl & 0x3) {
+        case HFCLK_FREQ_19p2_MHZ:
+                rate = 19200000;
+                break;
+        case HFCLK_FREQ_26_MHZ:
+                rate = 26000000;
+                break;
+        case HFCLK_FREQ_38p4_MHZ:
+                rate = 38400000;
+                break;
+        default:
+                pr_err("TWL4030: HFCLK is not configured\n");
+                rate = -EINVAL;
+                break;
+        }
+
+        return rate;
+}
+EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
+
 static struct device *
 add_numbered_child(unsigned chip, const char *name, int num,
                 void *pdata, unsigned pdata_len,
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index 7ea898c55a60..ac6488c9f250 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -188,6 +188,7 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 
 int twl_get_type(void);
 int twl_get_version(void);
+int twl_get_hfclk_rate(void);
 
 int twl6030_interrupt_unmask(u8 bit_mask, u8 offset);
 int twl6030_interrupt_mask(u8 bit_mask, u8 offset);