From mboxrd@z Thu Jan 1 00:00:00 1970 From: Haojian Zhuang Subject: [PATCH 3/3] ARM: mmp: add hardware lock support in PXA910 Date: Thu, 28 Apr 2011 12:02:38 +0800 Message-ID: <1303963358-4652-3-git-send-email-haojian.zhuang@gmail.com> References: <2011042801> Return-path: In-Reply-To: <2011042801> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: haojian.zhuang-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org, eric.y.miao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org, linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Haojian Zhuang List-Id: linux-i2c@vger.kernel.org RIPC register is used to implement hardware lock between CP and AP in Marvell PXA910. Signed-off-by: Haojian Zhuang Cc: Ben Dooks Cc: Eric Miao Cc: Russell King --- 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 #include 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 #include #include +#include #include #include @@ -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