mfd: palmas: Add support for external control configuration

Some of Palmas resources like clock, SMPSs, LDOs etc can be controlled
by external pins ENABLE1, ENABLE2 or NSLEEP.

Add support to configure these resources to externally controlled.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h
index 1a8dd7afe084..d2fca1c6f7df 100644
--- a/include/linux/mfd/palmas.h
+++ b/include/linux/mfd/palmas.h
@@ -183,6 +183,50 @@ enum palmas_regulators {
         PALMAS_NUM_REGS,
 };
 
+/* External controll signal name */
+enum {
+        PALMAS_EXT_CONTROL_ENABLE1      = 0x1,
+        PALMAS_EXT_CONTROL_ENABLE2      = 0x2,
+        PALMAS_EXT_CONTROL_NSLEEP       = 0x4,
+};
+
+/*
+ * Palmas device resources can be controlled externally for
+ * enabling/disabling it rather than register write through i2c.
+ * Add the external controlled requestor ID for different resources.
+ */
+enum palmas_external_requestor_id {
+        PALMAS_EXTERNAL_REQSTR_ID_REGEN1,
+        PALMAS_EXTERNAL_REQSTR_ID_REGEN2,
+        PALMAS_EXTERNAL_REQSTR_ID_SYSEN1,
+        PALMAS_EXTERNAL_REQSTR_ID_SYSEN2,
+        PALMAS_EXTERNAL_REQSTR_ID_CLK32KG,
+        PALMAS_EXTERNAL_REQSTR_ID_CLK32KGAUDIO,
+        PALMAS_EXTERNAL_REQSTR_ID_REGEN3,
+        PALMAS_EXTERNAL_REQSTR_ID_SMPS12,
+        PALMAS_EXTERNAL_REQSTR_ID_SMPS3,
+        PALMAS_EXTERNAL_REQSTR_ID_SMPS45,
+        PALMAS_EXTERNAL_REQSTR_ID_SMPS6,
+        PALMAS_EXTERNAL_REQSTR_ID_SMPS7,
+        PALMAS_EXTERNAL_REQSTR_ID_SMPS8,
+        PALMAS_EXTERNAL_REQSTR_ID_SMPS9,
+        PALMAS_EXTERNAL_REQSTR_ID_SMPS10,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO1,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO2,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO3,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO4,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO5,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO6,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO7,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO8,
+        PALMAS_EXTERNAL_REQSTR_ID_LDO9,
+        PALMAS_EXTERNAL_REQSTR_ID_LDOLN,
+        PALMAS_EXTERNAL_REQSTR_ID_LDOUSB,
+
+        /* Last entry */
+        PALMAS_EXTERNAL_REQSTR_ID_MAX,
+};
+
 struct palmas_pmic_platform_data {
         /* An array of pointers to regulator init data indexed by regulator
          * ID
@@ -2866,4 +2910,9 @@ static inline int palmas_irq_get_virq(struct palmas *palmas, int irq)
         return regmap_irq_get_virq(palmas->irq_data, irq);
 }
 
+
+int palmas_ext_control_req_config(struct palmas *palmas,
+        enum palmas_external_requestor_id ext_control_req_id,
+        int ext_ctrl, bool enable);
+
 #endif /*  __LINUX_MFD_PALMAS_H */