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Date: Thu, 28 Apr 2011 12:02:38 +0800
From: Haojian Zhuang <haojian.zhuang@...il.com>
To: haojian.zhuang@...vell.com, eric.y.miao@...il.com,
linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org,
ben-linux@...ff.org, linux-i2c@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Haojian Zhuang <haojian.zhuang@...il.com>
Subject: [PATCH 3/3] ARM: mmp: add hardware lock support in PXA910
RIPC register is used to implement hardware lock between CP and
AP in Marvell PXA910.
Signed-off-by: Haojian Zhuang <haojian.zhuang@...il.com>
Cc: Ben Dooks <ben-linux@...ff.org>
Cc: Eric Miao <eric.y.miao@...il.com>
Cc: Russell King <linux@....linux.org.uk>
---
arch/arm/mach-mmp/include/mach/pxa910.h | 3 ++
arch/arm/mach-mmp/pxa910.c | 21 +++++++++++++-
arch/arm/mach-mmp/ttc_dkb.c | 45 +++++++++++++++++++++++++++++++
3 files changed, 68 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-mmp/include/mach/pxa910.h b/arch/arm/mach-mmp/include/mach/pxa910.h
index 91be755..e7659a1 100644
--- a/arch/arm/mach-mmp/include/mach/pxa910.h
+++ b/arch/arm/mach-mmp/include/mach/pxa910.h
@@ -5,6 +5,9 @@ struct sys_timer;
extern struct sys_timer pxa910_timer;
extern void __init pxa910_init_irq(void);
+extern void pxa910_ripc_lock(void);
+extern void pxa910_ripc_unlock(void);
+extern int pxa910_ripc_trylock(void);
#include <linux/i2c.h>
#include <linux/i2c/pxa-i2c.h>
diff --git a/arch/arm/mach-mmp/pxa910.c b/arch/arm/mach-mmp/pxa910.c
index 8f92ccd..3190257 100644
--- a/arch/arm/mach-mmp/pxa910.c
+++ b/arch/arm/mach-mmp/pxa910.c
@@ -28,7 +28,10 @@
#include "common.h"
#include "clock.h"
-#define MFPR_VIRT_BASE (APB_VIRT_BASE + 0x1e000)
+#define MFPR_VIRT_BASE (APB_VIRT_BASE + 0x1e000)
+
+#define RIPC0_VIRT_BASE (APB_VIRT_BASE + 0x3D000)
+#define RIPC0_STATUS (RIPC0_VIRT_BASE + 0x00)
static struct mfp_addr_map pxa910_mfp_addr_map[] __initdata =
{
@@ -100,6 +103,22 @@ void __init pxa910_init_irq(void)
pxa910_init_gpio();
}
+void pxa910_ripc_lock(void)
+{
+ while (__raw_readl(RIPC0_STATUS))
+ cpu_relax();
+}
+
+int pxa910_ripc_trylock(void)
+{
+ return (!__raw_readl(RIPC0_STATUS));
+}
+
+void pxa910_ripc_unlock(void)
+{
+ __raw_writel(1, RIPC0_STATUS);
+}
+
/* APB peripheral clocks */
static APBC_CLK(uart1, PXA910_UART0, 1, 14745600);
static APBC_CLK(uart2, PXA910_UART1, 1, 14745600);
diff --git a/arch/arm/mach-mmp/ttc_dkb.c b/arch/arm/mach-mmp/ttc_dkb.c
index e411039..c6af021 100644
--- a/arch/arm/mach-mmp/ttc_dkb.c
+++ b/arch/arm/mach-mmp/ttc_dkb.c
@@ -15,6 +15,7 @@
#include <linux/mtd/partitions.h>
#include <linux/mtd/onenand.h>
#include <linux/interrupt.h>
+#include <linux/mfd/88pm860x.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -32,6 +33,10 @@ static unsigned long ttc_dkb_pin_config[] __initdata = {
GPIO47_UART2_RXD,
GPIO48_UART2_TXD,
+ /* I2C */
+ GPIO53_CI2C_SCL,
+ GPIO54_CI2C_SDA,
+
/* DFI */
DF_IO0_ND_IO0,
DF_IO1_ND_IO1,
@@ -113,12 +118,52 @@ static struct platform_device *ttc_dkb_devices[] = {
&ttc_dkb_device_onenand,
};
+static struct pm860x_led_pdata dkb_pm860x_led[] = {
+ {
+ .id = PM8606_ID_LED,
+ .iset = PM8606_LED_CURRENT(12),
+ .flags = PM8606_LED1_RED,
+ }, {
+ .id = PM8606_ID_LED,
+ .iset = PM8606_LED_CURRENT(12),
+ .flags = PM8606_LED1_GREEN,
+ }, {
+ .id = PM8606_ID_LED,
+ .iset = PM8606_LED_CURRENT(12),
+ .flags = PM8606_LED1_BLUE,
+ },
+};
+
+static struct pm860x_platform_data dkb_pm8607_info = {
+ .led = &dkb_pm860x_led[0],
+ .i2c_port = GI2C_PORT,
+ .companion_addr = 0x11,
+ .irq_mode = 0,
+ .irq_base = IRQ_BOARD_START,
+};
+
+static struct i2c_board_info dkb_i2c_info[] = {
+ {
+ .type = "88PM860x",
+ .addr = 0x34,
+ .platform_data = &dkb_pm8607_info,
+ .irq = IRQ_PXA910_PMIC_INT,
+ },
+};
+
+static struct i2c_pxa_platform_data dkb_i2c_pdata = {
+ .hardware_lock = pxa910_ripc_lock,
+ .hardware_unlock = pxa910_ripc_unlock,
+ .hardware_trylock = pxa910_ripc_trylock,
+};
+
static void __init ttc_dkb_init(void)
{
mfp_config(ARRAY_AND_SIZE(ttc_dkb_pin_config));
/* on-chip devices */
pxa910_add_uart(1);
+ pxa910_add_twsi(0, &dkb_i2c_pdata, ARRAY_AND_SIZE(dkb_i2c_info));
/* off-chip devices */
platform_add_devices(ARRAY_AND_SIZE(ttc_dkb_devices));
--
1.7.1
--
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