mfd: Detach twl6040 from the pmic mfd driver

On OMAP4 platform audio has separate IC, it is no longer part
of the pmic chip.
Prevent twl-core to claim the 0x4b address, which belongs to
the twl6040 audio IC.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 33 insertions, 26 deletions

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index eb9bd203e497..8bff96848102 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -113,8 +113,8 @@
 #define twl_has_watchdog()        false
 #endif
 
-#if defined(CONFIG_MFD_TWL4030_AUDIO) || defined(CONFIG_MFD_TWL4030_AUDIO_MODULE) ||\
-        defined(CONFIG_TWL6040_CORE) || defined(CONFIG_TWL6040_CORE_MODULE)
+#if defined(CONFIG_MFD_TWL4030_AUDIO) || \
+        defined(CONFIG_MFD_TWL4030_AUDIO_MODULE)
 #define twl_has_codec() true
 #else
 #define twl_has_codec() false
@@ -144,6 +144,7 @@
 #define SUB_CHIP_ID1 1
 #define SUB_CHIP_ID2 2
 #define SUB_CHIP_ID3 3
+#define SUB_CHIP_ID_INVAL 0xff
 
 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 
@@ -312,7 +313,7 @@ static struct twl_mapping twl6030_map[] = {
          * so they continue to match the order in this table.
          */
         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
-        { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
+        { SUB_CHIP_ID_INVAL, TWL6030_BASEADD_AUDIO },
         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
@@ -374,6 +375,11 @@ int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
                 return -EPERM;
         }
         sid = twl_map[mod_no].sid;
+        if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
+                pr_err("%s: module %d is not part of the pmic\n",
+                       DRIVER_NAME, mod_no);
+                return -EINVAL;
+        }
         twl = &twl_modules[sid];
 
         mutex_lock(&twl->xfer_lock);
@@ -431,6 +437,11 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
                 return -EPERM;
         }
         sid = twl_map[mod_no].sid;
+        if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
+                pr_err("%s: module %d is not part of the pmic\n",
+                       DRIVER_NAME, mod_no);
+                return -EINVAL;
+        }
         twl = &twl_modules[sid];
 
         mutex_lock(&twl->xfer_lock);
@@ -832,15 +843,6 @@ add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
                         return PTR_ERR(child);
         }
 
-        if (twl_has_codec() && pdata->audio && twl_class_is_6030()) {
-                sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
-                child = add_child(sub_chip_id, "twl6040",
-                                pdata->audio, sizeof(*pdata->audio),
-                                false, 0, 0);
-                if (IS_ERR(child))
-                        return PTR_ERR(child);
-        }
-
         /* twl4030 regulators */
         if (twl_has_regulator() && twl_class_is_4030()) {
                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
@@ -1156,18 +1158,21 @@ static void clocks_init(struct device *dev,
 
 static int twl_remove(struct i2c_client *client)
 {
-        unsigned i;
+        unsigned i, num_slaves;
         int status;
 
-        if (twl_class_is_4030())
+        if (twl_class_is_4030()) {
                 status = twl4030_exit_irq();
-        else
+                num_slaves = TWL_NUM_SLAVES;
+        } else {
                 status = twl6030_exit_irq();
+                num_slaves = TWL_NUM_SLAVES - 1;
+        }
 
         if (status < 0)
                 return status;
 
-        for (i = 0; i < TWL_NUM_SLAVES; i++) {
+        for (i = 0; i < num_slaves; i++) {
                 struct twl_client       *twl = &twl_modules[i];
 
                 if (twl->client && twl->client != client)
@@ -1186,7 +1191,7 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
         struct device_node              *node = client->dev.of_node;
         int                             irq_base = 0;
         int                             status;
-        unsigned                        i;
+        unsigned                        i, num_slaves;
 
         if (node && !pdata) {
                 /*
@@ -1215,7 +1220,17 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
                 return -EBUSY;
         }
 
-        for (i = 0; i < TWL_NUM_SLAVES; i++) {
+        if ((id->driver_data) & TWL6030_CLASS) {
+                twl_id = TWL6030_CLASS_ID;
+                twl_map = &twl6030_map[0];
+                num_slaves = TWL_NUM_SLAVES - 1;
+        } else {
+                twl_id = TWL4030_CLASS_ID;
+                twl_map = &twl4030_map[0];
+                num_slaves = TWL_NUM_SLAVES;
+        }
+
+        for (i = 0; i < num_slaves; i++) {
                 struct twl_client *twl = &twl_modules[i];
 
                 twl->address = client->addr + i;
@@ -1236,14 +1251,6 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
 
         inuse = true;
 
-        if ((id->driver_data) & TWL6030_CLASS) {
-                twl_id = TWL6030_CLASS_ID;
-                twl_map = &twl6030_map[0];
-        } else {
-                twl_id = TWL4030_CLASS_ID;
-                twl_map = &twl4030_map[0];
-        }
-
         /* setup clock framework */
         clocks_init(&client->dev, pdata->clock);