commit 1312b5d9097b8e3ea7a919388e10619f6fc64acc
author Channagoud Kadabi <ckadabi@codeaurora.org> Wed Jan 28 23:28:47 2015 -0800
committer Channagoud Kadabi <ckadabi@codeaurora.org> Tue Feb 24 14:17:35 2015 -0800
tree ce0573b7b49d41dd092a8c92ee2c9237b74360f3
parent 988f7b5ba4ff04a675e1ce079af75427664ddf3d

dev: pmic: Add support to hard reset pmic

Add support to hard reset all the pmics.

Change-Id: I2335cb14881a448d662df31dad9ee0023f2f0442

dev/pmic/pm8x41/pm8x41.c

diff --git a/dev/pmic/pm8x41/pm8x41.c b/dev/pmic/pm8x41/pm8x41.c
index 5886161..1784534 100644
--- a/dev/pmic/pm8x41/pm8x41.c
+++ b/dev/pmic/pm8x41/pm8x41.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
 
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -77,6 +77,24 @@
 	return val;
 }
 
+/* SPMI helper function which takes slave id as the i/p */
+void pm8xxx_reg_write(uint8_t slave_id, uint32_t addr, uint8_t val)
+{
+	struct pmic_arb_cmd cmd;
+	struct pmic_arb_param param;
+
+	cmd.address = PERIPH_ID(addr);
+	cmd.offset = REG_OFFSET(addr);
+	cmd.slave_id = slave_id;
+
+	cmd.priority = 0;
+
+	param.buffer = &val;
+	param.size   = 1;
+
+	pmic_arb_write_cmd(&cmd, &param);
+}
+
 void pm8x41_reg_write(uint32_t addr, uint8_t val)
 {
 	struct pmic_arb_cmd cmd;
@@ -333,6 +351,24 @@
 		return 0;
 }
 
+void pm8994_reset_configure(uint8_t reset_type)
+{
+	/* Slave ID 14 is global slave ID for all the pmics */
+	uint8_t slave_id = 14;
+
+	/* disable PS_HOLD_RESET */
+	pm8xxx_reg_write(slave_id, PON_PS_HOLD_RESET_CTL2, 0x0);
+
+	/* Delay needed for disable to kick in. */
+	udelay(300);
+
+	/* configure reset type */
+	pm8xxx_reg_write(slave_id, PON_PS_HOLD_RESET_CTL, reset_type);
+
+	/* enable PS_HOLD_RESET */
+	pm8xxx_reg_write(slave_id, PON_PS_HOLD_RESET_CTL2, BIT(S2_RESET_EN_BIT));
+}
+
 void pm8x41_v2_reset_configure(uint8_t reset_type)
 {
 	uint8_t val;