ux500: align u5500 PRCMU & CPUFREQ management with u8500 (multiple commits in one)

Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org>

Merge of following commits too:

u5500: add support for sysclk

basic sysclk support added in PRCMU driver and
clock framework driver updated.

Signed-off-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>

U5500: Support for ESRAM12 EPOD in PRCMU driver

Signed-off-by: Vijaya Kumar Kilari <vijay.kilari@stericsson.com>

ux500: regulator: handle different base offset of ePOD ID

5500 ePOD ids are offseted for some reason in the PRCMU driver.  Adjust the ids
to index the local arrays to avoid memory corruption.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>

ux500: pm: support PRCMU status check on 5500

This also removes unused 8500v1 code.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>

arm: ux500: prcmu_ac_wake_req workaround

This patch adds a check in prcmu_ac_wake_req that the modem is
awake (in terms of the value in the PRCM_MOD_AWAKE_STATUS
register) after the AC_WAKE_ACK has been received from the PRCMU
FW. If the check fails, a retry is made.

This seems to be necessary, since the modem can generate an
AC_WAKE_ACK, and then still go to sleep.

Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com>

U5500: Add support for PRCMU Mailbox0

Add PRCMU mailbox 0 support for irq wakeup
enable and disable

Signed-off-by: Vijaya Kumar K <vijay.kilari@stericsson.com>

U5500: Add support for power state transition

PRCMU driver is updated to provide API for
system power state transition

Signed-off-by: Vijaya Kumar K <vijay.kilari@stericsson.com>

ARM: ux500: prcmu: Add A9 watchdog interface

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>

U5500 : ab5500 core interrupt hander update

AB5500 interrupts will be now handled by PRCMU and then
routed to AB5500 core driver.AB5500 irq handler will
no more read the latch registers to find the interrupt
reason.Instead PRCMU will read the latch registers and
provide the values to core driver.

Signed-off-by: Bibek Basu <bibek.basu@stericsson.com>

ARM: ux500: prcmu-dbg: Tiny code clean-up

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>

u5500: add mailbox1 and related function support

Add cpufreq-db5500.c file for db5500 CPUfreq support.

PRCMU mailbox1 and related functions' support is added.
List of functions implemented:
- prcmu_get/set_arm_opp
- read_mailbox_1

Signed-off-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>

Fix for PRCMU

u5500: PRCMU IRQ should be NO_SUSPEND

As on 8500.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>

ARM: u5500: PRCMU reset API

Added API for rebooting the board and for getting the last reboot code.

Signed-off-by: Pawel Szyszuk <pawel.szyszuk@stericsson.com>

1 files changed, 18 insertions, 24 deletions

diff --git a/drivers/mfd/ab5500-core.c b/drivers/mfd/ab5500-core.c
index 75c773b232f..df0ce72e585 100755
--- a/drivers/mfd/ab5500-core.c
+++ b/drivers/mfd/ab5500-core.c
@@ -28,7 +28,8 @@
 #include <linux/spinlock.h>
 #include <linux/mfd/core.h>
 #include <linux/version.h>
-#include <linux/mfd/db5500-prcmu.h>
+#include <linux/io.h>
+#include <mach/prcmu.h>
 
 #define AB5500_NAME_STRING "ab5500"
 #define AB5500_ID_FORMAT_STRING "AB5500 %s"
@@ -48,7 +49,7 @@
 #define AB5500_MASK_BASE (0x60)
 #define AB5500_MASK_END (0x79)
 #define AB5500_CHIP_ID (0x20)
-
+#define AB5500_INTERRUPTS 0x007FFFFF
 /**
  * struct ab5500_bank
  * @slave_addr: I2C slave_addr found in AB5500 specification
@@ -1072,17 +1073,6 @@ static struct mfd_cell ab5500_devs[AB5500_NUM_DEVICES] = {
 };
 
 /*
- * This stubbed prcmu functionality should be removed when the prcmu driver
- * implements it.
- */
-static u8 prcmu_event_buf[AB5500_NUM_EVENT_REG];
-
-void prcmu_get_abb_event_buf(u8 **buf)
-{
-	*buf = prcmu_event_buf;
-}
-
-/*
  * Functionality for getting/setting register values.
  */
 static int get_register_interruptible(struct ab5500 *ab, u8 bank, u8 reg,
@@ -1355,19 +1345,20 @@ static irqreturn_t ab5500_irq(int irq, void *data)
 {
 	struct ab5500 *ab = data;
 	u8 i;
+	u8 *pvalue;
+	u8 value;
 
-	/*
-	 * TODO: use the ITMASTER registers to reduce the number of i2c reads.
-	 */
-
+	prcmu_get_abb_event_buffer((void **)&pvalue);
+	if (unlikely(pvalue == NULL)) {
+		dev_err(ab->dev, "PRCMU not enabled!!!\n");
+		goto error_irq;
+	}
 	for (i = 0; i < AB5500_NUM_EVENT_REG; i++) {
-		int status;
-		u8 value;
-
-		status = get_register_interruptible(ab, AB5500_BANK_IT,
-				AB5500_IT_LATCH0_REG + i, &value);
-		if (status < 0 || value == 0)
+		value = readb(pvalue);
+		if (value == 0) {
+			pvalue++;
 			continue;
+		}
 
 		do {
 			int bit = __ffs(value);
@@ -1376,9 +1367,12 @@ static irqreturn_t ab5500_irq(int irq, void *data)
 			handle_nested_irq(ab->irq_base + line);
 			value &= ~(1 << bit);
 		} while (value);
+		pvalue++;
 	}
 
 	return IRQ_HANDLED;
+error_irq:
+	return IRQ_NONE;
 }
 
 #ifdef CONFIG_DEBUG_FS
@@ -2416,7 +2410,7 @@ static int __init ab5500_probe(struct platform_device *pdev)
 			goto exit_remove_irq;
 
 	}
-
+	prcmu_config_abb_event_readout(AB5500_INTERRUPTS);
 	/* This real unpredictable IRQ is of course sampled for entropy */
 	rand_initialize_irq(res->start);