From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dinh.Nguyen@freescale.com (Dinh.Nguyen at freescale.com) Date: Fri, 15 Oct 2010 15:18:28 -0500 Subject: [PATCH 2/2] ARM: imx: Add POWER_KEY to mx51 babbage board In-Reply-To: <1287173908-25758-1-git-send-email-Dinh.Nguyen@freescale.com> References: <1287173908-25758-1-git-send-email-Dinh.Nguyen@freescale.com> Message-ID: <1287173908-25758-2-git-send-email-Dinh.Nguyen@freescale.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Dinh Nguyen Add functionality for the power button on MX51 Babbage board. Signed-off-by: Dinh Nguyen --- arch/arm/mach-mx5/board-mx51_babbage.c | 42 +++++++++++++++++++++++++++ arch/arm/plat-mxc/include/mach/iomux-mx51.h | 4 ++- 2 files changed, 45 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c index 6e384d9..92f16ca 100644 --- a/arch/arm/mach-mx5/board-mx51_babbage.c +++ b/arch/arm/mach-mx5/board-mx51_babbage.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include #include #include @@ -36,6 +38,7 @@ #define BABBAGE_USB_HUB_RESET (0*32 + 7) /* GPIO_1_7 */ #define BABBAGE_USBH1_STP (0*32 + 27) /* GPIO_1_27 */ #define BABBAGE_PHY_RESET (1*32 +5) /* GPIO_2_5 */ +#define BABBAGE_POWER_KEY (1*32 + 21) /* GPIO_2_21 */ /* USB_CTRL_1 */ #define MX51_USB_CTRL_1_OFFSET 0x10 @@ -93,6 +96,9 @@ static struct pad_desc mx51babbage_pads[] = { /* USB HUB reset line*/ MX51_PAD_GPIO_1_7__GPIO_1_7, + + /* Power Key */ + MX51_PAD_EIM_A27__GPIO_2_21, }; /* Serial ports */ @@ -240,6 +246,42 @@ static int __init babbage_otg_mode(char *options) } __setup("otg_mode=", babbage_otg_mode); +/*! + * Power Key interrupt handler. + */ +static irqreturn_t power_key_int(int irq, void *dev_id) +{ + printk(KERN_INFO "PWR key pressed\n"); + return 0; +} + +/*! + * Power Key initialization. + */ +static int __init mxc_init_power_key(void) +{ + /* Set power key as wakeup resource */ + int irq, ret; + + /* power key */ + ret = gpio_request(BABBAGE_POWER_KEY, "power-key"); + if (ret) { + printk(KERN_ERR"failed to get BABBAGE_POWER_KEY: %d\n", ret); + return ret; + } + gpio_direction_input(BABBAGE_POWER_KEY); + + irq = IOMUX_TO_IRQ(BABBAGE_POWER_KEY); + set_irq_type(irq, IRQF_TRIGGER_RISING); + ret = request_irq(irq, power_key_int, 0, "power-key", 0); + if (ret) + pr_info("register on-off key interrupt failed\n"); + else + enable_irq_wake(irq); + return ret; +} +late_initcall(mxc_init_power_key); + /* * Board specific initialization. */ diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx51.h b/arch/arm/plat-mxc/include/mach/iomux-mx51.h index 21bfa46..05f62a4 100644 --- a/arch/arm/plat-mxc/include/mach/iomux-mx51.h +++ b/arch/arm/plat-mxc/include/mach/iomux-mx51.h @@ -31,6 +31,8 @@ typedef enum iomux_config { IOMUX_CONFIG_SION = 0x1 << 4, /* LOOPBACK:MUX SION bit */ } iomux_pin_cfg_t; +#define IOMUX_TO_IRQ(pin) (MXC_GPIO_IRQ_START + pin) + /* Pad control groupings */ #define MX51_UART1_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_PKE | PAD_CTL_PUE | \ PAD_CTL_DSE_HIGH) @@ -102,7 +104,7 @@ typedef enum iomux_config { #define MX51_PAD_EIM_A24__GPIO_2_18 IOMUX_PAD(0x450, 0x0bc, 1, 0x0, 0, NO_PAD_CTRL) #define MX51_PAD_EIM_A25__GPIO_2_19 IOMUX_PAD(0x454, 0x0c0, 1, 0x0, 0, NO_PAD_CTRL) #define MX51_PAD_EIM_A26__GPIO_2_20 IOMUX_PAD(0x458, 0x0c4, 1, 0x0, 0, NO_PAD_CTRL) -#define MX51_PAD_EIM_A27__GPIO_2_21 IOMUX_PAD(0x45c, 0x0c8, 1, 0x0, 0, NO_PAD_CTRL) +#define MX51_PAD_EIM_A27__GPIO_2_21 IOMUX_PAD(0x45c, 0x0c8, 1, 0x0, 0, MX51_I2C_PAD_CTRL) #define MX51_PAD_EIM_EB0__EIM_EB0 IOMUX_PAD(0x460, 0x0cc, 0, 0x0, 0, NO_PAD_CTRL) #define MX51_PAD_EIM_EB1__EIM_EB1 IOMUX_PAD(0x464, 0x0d0, 0, 0x0, 0, NO_PAD_CTRL) #define MX51_PAD_EIM_EB2__GPIO_2_22 IOMUX_PAD(0x468, 0x0d4, 1, 0x0, 0, NO_PAD_CTRL) -- 1.6.0.4