Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933259Ab1D1PQm (ORCPT ); Thu, 28 Apr 2011 11:16:42 -0400 Received: from mail-px0-f179.google.com ([209.85.212.179]:48134 "EHLO mail-px0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760615Ab1D1PQj (ORCPT ); Thu, 28 Apr 2011 11:16:39 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=RyDCjDSS+Dgpk61qDISSUxNe4Qyd4CqpA9z5gsquqcSSo/y6sFHMDWGW0hDzOa3hZa hydxAxJOazpmXF8sY3ubhX9dt4hT2Y5hbvrTKuzUjMETW/vXzLkEFI2ZX76kRNENjkpO sXYfs9TSfbK29vNsTR3R92RSCWoZgk+olXGWc= From: Haojian Zhuang To: eric.y.miao@gmail.com, khali@linux-fr.org, ben-linux@fluff.org, linux-i2c@vger.kernel.org, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Haojian Zhuang Subject: [PATCH 3/3] ARM: mmp: add hardware lock support in PXA910 Date: Thu, 28 Apr 2011 23:15:46 +0800 Message-Id: <1304003746-12127-3-git-send-email-haojian.zhuang@gmail.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <2011042801> References: <2011042801> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4904 Lines: 175 RIPC register is used to implement hardware lock between CP and AP in Marvell PXA910. Signed-off-by: Haojian Zhuang Cc: Ben Dooks Cc: Jean Delvare Cc: Eric Miao Cc: Russell King --- arch/arm/mach-mmp/include/mach/pxa910.h | 13 +++++--- arch/arm/mach-mmp/pxa910.c | 23 +++++++++++++++- arch/arm/mach-mmp/ttc_dkb.c | 45 +++++++++++++++++++++++++++++++ 3 files changed, 75 insertions(+), 6 deletions(-) diff --git a/arch/arm/mach-mmp/include/mach/pxa910.h b/arch/arm/mach-mmp/include/mach/pxa910.h index 91be755..2973466 100644 --- a/arch/arm/mach-mmp/include/mach/pxa910.h +++ b/arch/arm/mach-mmp/include/mach/pxa910.h @@ -1,16 +1,19 @@ #ifndef __ASM_MACH_PXA910_H #define __ASM_MACH_PXA910_H -struct sys_timer; - -extern struct sys_timer pxa910_timer; -extern void __init pxa910_init_irq(void); - #include #include #include #include +struct sys_timer; + +extern struct sys_timer pxa910_timer; +extern void __init pxa910_init_irq(void); +extern void pxa910_ripc_lock(struct i2c_adapter *); +extern void pxa910_ripc_unlock(struct i2c_adapter *); +extern int pxa910_ripc_trylock(struct i2c_adapter *); + extern struct pxa_device_desc pxa910_device_uart1; extern struct pxa_device_desc pxa910_device_uart2; extern struct pxa_device_desc pxa910_device_twsi0; diff --git a/arch/arm/mach-mmp/pxa910.c b/arch/arm/mach-mmp/pxa910.c index 8f92ccd..4fbe485 100644 --- a/arch/arm/mach-mmp/pxa910.c +++ b/arch/arm/mach-mmp/pxa910.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include @@ -28,7 +29,10 @@ #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 +104,23 @@ void __init pxa910_init_irq(void) pxa910_init_gpio(); } +void pxa910_ripc_lock(struct i2c_adapter *adap) +{ + while (__raw_readl(RIPC0_STATUS)) + cpu_relax(); +} + +/* return 1 -- succeed to get lock; 0 -- fail to get lock */ +int pxa910_ripc_trylock(struct i2c_adapter *adap) +{ + return (!__raw_readl(RIPC0_STATUS)); +} + +void pxa910_ripc_unlock(struct i2c_adapter *adap) +{ + __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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/