[PATCH v2] ARM: ux500: prcmu db8500 v2 support
Mattias Wallin
mattias.wallin at stericsson.com
Thu Dec 2 10:20:42 EST 2010
This patch adds support for db8500 chip version 2.
The TCDM memory address of the PRCMU is changed and
dynamic detection of that is added.
Signed-off-by: Mattias Wallin <mattias.wallin at stericsson.com>
Acked-by: Linus Walleij <linus.walleij at stericsson.com>
---
v2 of this patch allows the prcmu to be used on HW version early drop (ed).
---
arch/arm/mach-ux500/cpu-db8500.c | 18 +++++++++++-----
arch/arm/mach-ux500/cpu.c | 2 +
arch/arm/mach-ux500/include/mach/db8500-regs.h | 3 +-
arch/arm/mach-ux500/include/mach/prcmu.h | 1 +
arch/arm/mach-ux500/prcmu.c | 25 +++++++++++++++++++----
5 files changed, 37 insertions(+), 12 deletions(-)
diff --git a/arch/arm/mach-ux500/cpu-db8500.c b/arch/arm/mach-ux500/cpu-db8500.c
index 5966f35..b78970c 100644
--- a/arch/arm/mach-ux500/cpu-db8500.c
+++ b/arch/arm/mach-ux500/cpu-db8500.c
@@ -40,7 +40,6 @@ static struct platform_device *platform_devs[] __initdata = {
/* minimum static i/o mapping required to boot U8500 platforms */
static struct map_desc u8500_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
- __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
@@ -48,13 +47,18 @@ static struct map_desc u8500_io_desc[] __initdata = {
__MEM_DEV_DESC(U8500_BOOT_ROM_BASE, SZ_1M),
};
-static struct map_desc u8500ed_io_desc[] __initdata = {
+static struct map_desc u8500_ed_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_MTU0_BASE_ED, SZ_4K),
__IO_DEV_DESC(U8500_CLKRST7_BASE_ED, SZ_8K),
};
-static struct map_desc u8500v1_io_desc[] __initdata = {
+static struct map_desc u8500_v1_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
+ __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE_V1, SZ_4K),
+};
+
+static struct map_desc u8500_v2_io_desc[] __initdata = {
+ __IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
};
/*
@@ -127,9 +131,11 @@ void __init u8500_map_io(void)
iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
if (cpu_is_u8500ed())
- iotable_init(u8500ed_io_desc, ARRAY_SIZE(u8500ed_io_desc));
- else
- iotable_init(u8500v1_io_desc, ARRAY_SIZE(u8500v1_io_desc));
+ iotable_init(u8500_ed_io_desc, ARRAY_SIZE(u8500_ed_io_desc));
+ else if (cpu_is_u8500v1())
+ iotable_init(u8500_v1_io_desc, ARRAY_SIZE(u8500_v1_io_desc));
+ else if (cpu_is_u8500v2())
+ iotable_init(u8500_v2_io_desc, ARRAY_SIZE(u8500_v2_io_desc));
/* Read out the ASIC ID as early as we can */
get_db8500_asic_id();
diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c
index 0db48cc..f316484 100644
--- a/arch/arm/mach-ux500/cpu.c
+++ b/arch/arm/mach-ux500/cpu.c
@@ -19,6 +19,7 @@
#include <mach/hardware.h>
#include <mach/setup.h>
#include <mach/devices.h>
+#include <mach/prcmu.h>
#include "clock.h"
@@ -58,6 +59,7 @@ void __init ux500_init_irq(void)
* Init clocks here so that they are available for system timer
* initialization.
*/
+ prcmu_early_init();
clk_init();
}
diff --git a/arch/arm/mach-ux500/include/mach/db8500-regs.h b/arch/arm/mach-ux500/include/mach/db8500-regs.h
index f07d098..0fefb34 100644
--- a/arch/arm/mach-ux500/include/mach/db8500-regs.h
+++ b/arch/arm/mach-ux500/include/mach/db8500-regs.h
@@ -92,7 +92,8 @@
#define U8500_SCR_BASE (U8500_PER4_BASE + 0x05000)
#define U8500_DMC_BASE (U8500_PER4_BASE + 0x06000)
#define U8500_PRCMU_BASE (U8500_PER4_BASE + 0x07000)
-#define U8500_PRCMU_TCDM_BASE (U8500_PER4_BASE + 0x0f000)
+#define U8500_PRCMU_TCDM_BASE_V1 (U8500_PER4_BASE + 0x0f000)
+#define U8500_PRCMU_TCDM_BASE (U8500_PER4_BASE + 0x68000)
/* per3 base addresses */
#define U8500_FSMC_BASE (U8500_PER3_BASE + 0x0000)
diff --git a/arch/arm/mach-ux500/include/mach/prcmu.h b/arch/arm/mach-ux500/include/mach/prcmu.h
index 549843f..daa9d3a 100644
--- a/arch/arm/mach-ux500/include/mach/prcmu.h
+++ b/arch/arm/mach-ux500/include/mach/prcmu.h
@@ -9,6 +9,7 @@
#ifndef __MACH_PRCMU_H
#define __MACH_PRCMU_H
+void __init prcmu_early_init(void);
int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size);
int prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size);
diff --git a/arch/arm/mach-ux500/prcmu.c b/arch/arm/mach-ux500/prcmu.c
index 293274d..3ba3e32 100644
--- a/arch/arm/mach-ux500/prcmu.c
+++ b/arch/arm/mach-ux500/prcmu.c
@@ -20,10 +20,11 @@
#include <mach/hardware.h>
#include <mach/prcmu-regs.h>
-#define PRCMU_TCDM_BASE __io_address(U8500_PRCMU_TCDM_BASE)
+/* Global var to runtime determine TCDM base for v2 or v1 */
+static __iomem void *tcdm_base;
-#define REQ_MB5 (PRCMU_TCDM_BASE + 0xE44)
-#define ACK_MB5 (PRCMU_TCDM_BASE + 0xDF4)
+#define REQ_MB5 (tcdm_base + 0xE44)
+#define ACK_MB5 (tcdm_base + 0xDF4)
#define REQ_MB5_I2C_SLAVE_OP (REQ_MB5)
#define REQ_MB5_I2C_HW_BITS (REQ_MB5 + 1)
@@ -33,8 +34,10 @@
#define ACK_MB5_I2C_STATUS (ACK_MB5 + 1)
#define ACK_MB5_I2C_VAL (ACK_MB5 + 3)
-#define I2C_WRITE(slave) ((slave) << 1)
-#define I2C_READ(slave) (((slave) << 1) | BIT(0))
+#define I2C_WRITE(slave) \
+ (((slave) << 1) | (cpu_is_u8500v2() ? BIT(6) : 0))
+#define I2C_READ(slave) \
+ (((slave) << 1) | (cpu_is_u8500v2() ? BIT(6) : 0) | BIT(0))
#define I2C_STOP_EN BIT(3)
enum ack_mb5_status {
@@ -217,6 +220,18 @@ static irqreturn_t prcmu_irq_handler(int irq, void *data)
return IRQ_HANDLED;
}
+void __init prcmu_early_init(void)
+{
+ if (cpu_is_u8500v11() || cpu_is_u8500ed()) {
+ tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE_V1);
+ } else if (cpu_is_u8500v2()) {
+ tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE);
+ } else {
+ pr_err("prcmu: Unsupported chip version\n");
+ BUG();
+ }
+}
+
static int __init prcmu_init(void)
{
mutex_init(&mb5_transfer.lock);
--
1.7.2.2
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