mfd: Add support for twl6030 irq framework

This patch adds support for phoenix interrupt framework. New iInterrupt
status register A, B, C are introduced in Phoenix and are cleared on write.
Due to the differences in interrupt handling with respect to TWL4030,
twl6030-irq.c is created for TWL6030 PMIC

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 106 insertions, 14 deletions

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 79946fe800af..c48a6138c575 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -181,6 +181,30 @@
 /* Triton Core internal information (END) */
 
 
+/* subchip/slave 0 0x48 - POWER */
+#define TWL6030_BASEADD_RTC             0x0000
+#define TWL6030_BASEADD_MEM             0x0017
+#define TWL6030_BASEADD_PM_MASTER       0x001F
+#define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
+#define TWL6030_BASEADD_PM_MISC         0x00E2
+#define TWL6030_BASEADD_PM_PUPD         0x00F0
+
+/* subchip/slave 1 0x49 - FEATURE */
+#define TWL6030_BASEADD_USB             0x0000
+#define TWL6030_BASEADD_GPADC_CTRL      0x002E
+#define TWL6030_BASEADD_AUX             0x0090
+#define TWL6030_BASEADD_PWM             0x00BA
+#define TWL6030_BASEADD_GASGAUGE        0x00C0
+#define TWL6030_BASEADD_PIH             0x00D0
+#define TWL6030_BASEADD_CHARGER         0x00E0
+
+/* subchip/slave 2 0x4A - DFT */
+#define TWL6030_BASEADD_DIEID           0x00C0
+
+/* subchip/slave 3 0x4B - AUDIO */
+#define TWL6030_BASEADD_AUDIO           0x0000
+#define TWL6030_BASEADD_RSV             0x0000
+
 /* Few power values */
 #define R_CFG_BOOT                      0x05
 #define R_PROTECT_KEY                   0x0E
@@ -202,13 +226,21 @@
 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
+#define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 
 /*----------------------------------------------------------------------*/
 
 /* is driver active, bound to a chip? */
 static bool inuse;
 
-/* Structure for each TWL4030 Slave */
+static unsigned int twl_id;
+unsigned int twl_rev(void)
+{
+        return twl_id;
+}
+EXPORT_SYMBOL(twl_rev);
+
+/* Structure for each TWL4030/TWL6030 Slave */
 struct twl_client {
         struct i2c_client *client;
         u8 address;
@@ -228,11 +260,12 @@ struct twl_mapping {
         unsigned char sid;      /* Slave ID */
         unsigned char base;     /* base address */
 };
+struct twl_mapping *twl_map;
 
 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
         /*
          * NOTE:  don't change this table without updating the
-         * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
+         * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
          * so they continue to match the order in this table.
          */
 
@@ -265,6 +298,40 @@ static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
         { 3, TWL4030_BASEADD_SECURED_REG },
 };
 
+static struct twl_mapping twl6030_map[] = {
+        /*
+         * NOTE:  don't change this table without updating the
+         * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
+         * so they continue to match the order in this table.
+         */
+        { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
+        { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+        { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
+
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+        { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+
+        { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
+        { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
+        { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+        { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
+        { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
+        { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
+
+        { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
+        { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
+};
+
 /*----------------------------------------------------------------------*/
 
 /* Exported Functions */
@@ -292,7 +359,7 @@ int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
                 return -EPERM;
         }
-        sid = twl4030_map[mod_no].sid;
+        sid = twl_map[mod_no].sid;
         twl = &twl_modules[sid];
 
         if (unlikely(!inuse)) {
@@ -310,7 +377,7 @@ int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
         msg->flags = 0;
         msg->buf = value;
         /* over write the first byte of buffer with the register address */
-        *value = twl4030_map[mod_no].base + reg;
+        *value = twl_map[mod_no].base + reg;
         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
         mutex_unlock(&twl->xfer_lock);
 
@@ -349,7 +416,7 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
                 return -EPERM;
         }
-        sid = twl4030_map[mod_no].sid;
+        sid = twl_map[mod_no].sid;
         twl = &twl_modules[sid];
 
         if (unlikely(!inuse)) {
@@ -362,7 +429,7 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
         msg->addr = twl->address;
         msg->len = 1;
         msg->flags = 0; /* Read the register value */
-        val = twl4030_map[mod_no].base + reg;
+        val = twl_map[mod_no].base + reg;
         msg->buf = &val;
         /* [MSG2] fill the data rx buffer */
         msg = &twl->xfer_msg[1];
@@ -486,6 +553,7 @@ add_regulator_linked(int num, struct regulator_init_data *pdata,
                 struct regulator_consumer_supply *consumers,
                 unsigned num_consumers)
 {
+        unsigned sub_chip_id;
         /* regulator framework demands init_data ... */
         if (!pdata)
                 return NULL;
@@ -496,7 +564,8 @@ add_regulator_linked(int num, struct regulator_init_data *pdata,
         }
 
         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
-        return add_numbered_child(3, "twl_reg", num,
+        sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
+        return add_numbered_child(sub_chip_id, "twl_reg", num,
                 pdata, sizeof(*pdata), false, 0, 0);
 }
 
@@ -516,6 +585,7 @@ static int
 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 {
         struct device   *child;
+        unsigned sub_chip_id;
 
         if (twl_has_bci() && pdata->bci &&
             !(features & (TPS_SUBSET | TWL5031))) {
@@ -561,7 +631,8 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features)
                  * Eventually, Linux might become more aware of such
                  * HW security concerns, and "least privilege".
                  */
-                child = add_child(3, "twl_rtc",
+                sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
+                child = add_child(sub_chip_id, "twl_rtc",
                                 NULL, 0,
                                 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
                 if (IS_ERR(child))
@@ -812,16 +883,22 @@ static void clocks_init(struct device *dev,
 
 /*----------------------------------------------------------------------*/
 
-int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
-int twl_exit_irq(void);
-int twl_init_chip_irq(const char *chip);
+int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
+int twl4030_exit_irq(void);
+int twl4030_init_chip_irq(const char *chip);
+int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
+int twl6030_exit_irq(void);
 
 static int twl_remove(struct i2c_client *client)
 {
         unsigned i;
         int status;
 
-        status = twl_exit_irq();
+        if (twl_class_is_4030())
+                status = twl4030_exit_irq();
+        else
+                status = twl6030_exit_irq();
+
         if (status < 0)
                 return status;
 
@@ -878,6 +955,13 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
                 mutex_init(&twl->xfer_lock);
         }
         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);
@@ -890,8 +974,15 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
         if (client->irq
                         && pdata->irq_base
                         && pdata->irq_end > pdata->irq_base) {
-                twl_init_chip_irq(id->name);
-                status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
+                if (twl_class_is_4030()) {
+                        twl4030_init_chip_irq(id->name);
+                        status = twl4030_init_irq(client->irq, pdata->irq_base,
+                        pdata->irq_end);
+                } else {
+                        status = twl6030_init_irq(client->irq, pdata->irq_base,
+                        pdata->irq_end);
+                }
+
                 if (status < 0)
                         goto fail;
         }
@@ -910,6 +1001,7 @@ static const struct i2c_device_id twl_ids[] = {
         { "tps65950", 0 },              /* catalog version of twl5030 */
         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
+        { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
         { /* end of list */ },
 };
 MODULE_DEVICE_TABLE(i2c, twl_ids);