* [PATCHv7 1/3] ARM: imx: Add gpio-keys to plat-mxc
@ 2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
0 siblings, 0 replies; 6+ messages in thread
From: Dinh.Nguyen @ 2010-10-23 14:12 UTC (permalink / raw)
To: linux-kernel
Cc: linux-arm-kernel, linux, s.hauer, u.kleine-koenig,
valentin.longchamp, daniel, grant.likely, amit.kucheria,
Dinh Nguyen
From: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Add imx_add_gpio_keys function to add gpio-keys in plat-mxc
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
---
arch/arm/plat-mxc/devices/Kconfig | 4 +++
arch/arm/plat-mxc/devices/Makefile | 1 +
arch/arm/plat-mxc/devices/platform-gpio_keys.c | 27 +++++++++++++++++++++++
arch/arm/plat-mxc/include/mach/devices-common.h | 4 +++
arch/arm/plat-mxc/include/mach/iomux-mx51.h | 2 +
5 files changed, 38 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/plat-mxc/devices/platform-gpio_keys.c
diff --git a/arch/arm/plat-mxc/devices/Kconfig b/arch/arm/plat-mxc/devices/Kconfig
index 4047994..f4772e7 100644
--- a/arch/arm/plat-mxc/devices/Kconfig
+++ b/arch/arm/plat-mxc/devices/Kconfig
@@ -9,6 +9,10 @@ config IMX_HAVE_PLATFORM_FLEXCAN
select HAVE_CAN_FLEXCAN
bool
+config IMX_HAVE_PLATFORM_GPIO_KEYS
+ bool
+ default y if ARCH_MX51
+
config IMX_HAVE_PLATFORM_IMX_I2C
bool
diff --git a/arch/arm/plat-mxc/devices/Makefile b/arch/arm/plat-mxc/devices/Makefile
index 0a3c1f0..45aefeb 100644
--- a/arch/arm/plat-mxc/devices/Makefile
+++ b/arch/arm/plat-mxc/devices/Makefile
@@ -1,6 +1,7 @@
obj-$(CONFIG_IMX_HAVE_PLATFORM_ESDHC) += platform-esdhc.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_FEC) += platform-fec.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_FLEXCAN) += platform-flexcan.o
+obj-$(CONFIG_IMX_HAVE_PLATFORM_GPIO_KEYS) += platform-gpio_keys.o
obj-y += platform-imx-dma.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_I2C) += platform-imx-i2c.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_SSI) += platform-imx-ssi.o
diff --git a/arch/arm/plat-mxc/devices/platform-gpio_keys.c b/arch/arm/plat-mxc/devices/platform-gpio_keys.c
new file mode 100644
index 0000000..1c53a53
--- /dev/null
+++ b/arch/arm/plat-mxc/devices/platform-gpio_keys.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#include <asm/sizes.h>
+#include <mach/hardware.h>
+#include <mach/devices-common.h>
+
+struct platform_device *__init imx_add_gpio_keys(
+ const struct gpio_keys_platform_data *pdata)
+{
+ return imx_add_platform_device("gpio-keys", -1, NULL,
+ 0, pdata, sizeof(*pdata));
+}
diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index 86d7575..8c6896f 100644
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h
@@ -29,6 +29,10 @@ struct platform_device *__init imx_add_flexcan(int id,
resource_size_t irq,
const struct flexcan_platform_data *pdata);
+#include <linux/gpio_keys.h>
+struct platform_device *__init imx_add_gpio_keys(
+ const struct gpio_keys_platform_data *pdata);
+
#include <mach/i2c.h>
struct imx_imx_i2c_data {
int id;
diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx51.h b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
index e46b1c2..d7a41e9 100644
--- a/arch/arm/plat-mxc/include/mach/iomux-mx51.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
@@ -45,6 +45,8 @@ typedef enum iomux_config {
PAD_CTL_PKE | PAD_CTL_HYS)
#define MX51_GPIO_PAD_CTRL (PAD_CTL_DSE_HIGH | PAD_CTL_PKE | \
PAD_CTL_SRE_FAST)
+#define MX51_GPIO_PAD_CTRL_2 (PAD_CTL_SRE_FAST | PAD_CTL_DSE_HIGH | \
+ PAD_CTL_PUS_100K_UP)
#define MX51_ECSPI_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_PKE | PAD_CTL_DSE_HIGH | \
PAD_CTL_SRE_FAST)
#define MX51_SDHCI_PAD_CTRL (PAD_CTL_DSE_HIGH | PAD_CTL_PUS_47K_UP | \
--
1.6.0.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCHv7 1/3] ARM: imx: Add gpio-keys to plat-mxc
@ 2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
0 siblings, 0 replies; 6+ messages in thread
From: Dinh.Nguyen at freescale.com @ 2010-10-23 14:12 UTC (permalink / raw)
To: linux-arm-kernel
From: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Add imx_add_gpio_keys function to add gpio-keys in plat-mxc
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
---
arch/arm/plat-mxc/devices/Kconfig | 4 +++
arch/arm/plat-mxc/devices/Makefile | 1 +
arch/arm/plat-mxc/devices/platform-gpio_keys.c | 27 +++++++++++++++++++++++
arch/arm/plat-mxc/include/mach/devices-common.h | 4 +++
arch/arm/plat-mxc/include/mach/iomux-mx51.h | 2 +
5 files changed, 38 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/plat-mxc/devices/platform-gpio_keys.c
diff --git a/arch/arm/plat-mxc/devices/Kconfig b/arch/arm/plat-mxc/devices/Kconfig
index 4047994..f4772e7 100644
--- a/arch/arm/plat-mxc/devices/Kconfig
+++ b/arch/arm/plat-mxc/devices/Kconfig
@@ -9,6 +9,10 @@ config IMX_HAVE_PLATFORM_FLEXCAN
select HAVE_CAN_FLEXCAN
bool
+config IMX_HAVE_PLATFORM_GPIO_KEYS
+ bool
+ default y if ARCH_MX51
+
config IMX_HAVE_PLATFORM_IMX_I2C
bool
diff --git a/arch/arm/plat-mxc/devices/Makefile b/arch/arm/plat-mxc/devices/Makefile
index 0a3c1f0..45aefeb 100644
--- a/arch/arm/plat-mxc/devices/Makefile
+++ b/arch/arm/plat-mxc/devices/Makefile
@@ -1,6 +1,7 @@
obj-$(CONFIG_IMX_HAVE_PLATFORM_ESDHC) += platform-esdhc.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_FEC) += platform-fec.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_FLEXCAN) += platform-flexcan.o
+obj-$(CONFIG_IMX_HAVE_PLATFORM_GPIO_KEYS) += platform-gpio_keys.o
obj-y += platform-imx-dma.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_I2C) += platform-imx-i2c.o
obj-$(CONFIG_IMX_HAVE_PLATFORM_IMX_SSI) += platform-imx-ssi.o
diff --git a/arch/arm/plat-mxc/devices/platform-gpio_keys.c b/arch/arm/plat-mxc/devices/platform-gpio_keys.c
new file mode 100644
index 0000000..1c53a53
--- /dev/null
+++ b/arch/arm/plat-mxc/devices/platform-gpio_keys.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#include <asm/sizes.h>
+#include <mach/hardware.h>
+#include <mach/devices-common.h>
+
+struct platform_device *__init imx_add_gpio_keys(
+ const struct gpio_keys_platform_data *pdata)
+{
+ return imx_add_platform_device("gpio-keys", -1, NULL,
+ 0, pdata, sizeof(*pdata));
+}
diff --git a/arch/arm/plat-mxc/include/mach/devices-common.h b/arch/arm/plat-mxc/include/mach/devices-common.h
index 86d7575..8c6896f 100644
--- a/arch/arm/plat-mxc/include/mach/devices-common.h
+++ b/arch/arm/plat-mxc/include/mach/devices-common.h
@@ -29,6 +29,10 @@ struct platform_device *__init imx_add_flexcan(int id,
resource_size_t irq,
const struct flexcan_platform_data *pdata);
+#include <linux/gpio_keys.h>
+struct platform_device *__init imx_add_gpio_keys(
+ const struct gpio_keys_platform_data *pdata);
+
#include <mach/i2c.h>
struct imx_imx_i2c_data {
int id;
diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx51.h b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
index e46b1c2..d7a41e9 100644
--- a/arch/arm/plat-mxc/include/mach/iomux-mx51.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-mx51.h
@@ -45,6 +45,8 @@ typedef enum iomux_config {
PAD_CTL_PKE | PAD_CTL_HYS)
#define MX51_GPIO_PAD_CTRL (PAD_CTL_DSE_HIGH | PAD_CTL_PKE | \
PAD_CTL_SRE_FAST)
+#define MX51_GPIO_PAD_CTRL_2 (PAD_CTL_SRE_FAST | PAD_CTL_DSE_HIGH | \
+ PAD_CTL_PUS_100K_UP)
#define MX51_ECSPI_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_PKE | PAD_CTL_DSE_HIGH | \
PAD_CTL_SRE_FAST)
#define MX51_SDHCI_PAD_CTRL (PAD_CTL_DSE_HIGH | PAD_CTL_PUS_47K_UP | \
--
1.6.0.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCHv7 2/3] ARM: mx5: Add gpio-keys to mx51 babbage board
2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
@ 2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
-1 siblings, 0 replies; 6+ messages in thread
From: Dinh.Nguyen @ 2010-10-23 14:12 UTC (permalink / raw)
To: linux-kernel
Cc: linux-arm-kernel, linux, s.hauer, u.kleine-koenig,
valentin.longchamp, daniel, grant.likely, amit.kucheria,
Dinh Nguyen
From: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Add functionality for the power button on MX51 Babbage board.
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
---
arch/arm/configs/mx51_defconfig | 1 +
arch/arm/mach-mx5/board-mx51_babbage.c | 24 ++++++++++++++++++++++++
arch/arm/mach-mx5/devices-imx51.h | 2 ++
3 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/arch/arm/configs/mx51_defconfig b/arch/arm/configs/mx51_defconfig
index 163cfee..5c7a872 100644
--- a/arch/arm/configs/mx51_defconfig
+++ b/arch/arm/configs/mx51_defconfig
@@ -82,6 +82,7 @@ CONFIG_FEC=y
CONFIG_INPUT_FF_MEMLESS=m
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_EVDEV=y
+CONFIG_KEYBOARD_GPIO=y
CONFIG_INPUT_EVBUG=m
CONFIG_MOUSE_PS2=m
CONFIG_MOUSE_PS2_ELANTECH=y
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index 23ee4a4..276a1fb 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -18,6 +18,8 @@
#include <linux/io.h>
#include <linux/fsl_devices.h>
#include <linux/fec.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
#include <mach/common.h>
#include <mach/hardware.h>
@@ -37,6 +39,7 @@
#define BABBAGE_USBH1_STP (0*32 + 27) /* GPIO_1_27 */
#define BABBAGE_PHY_RESET (1*32 + 5) /* GPIO_2_5 */
#define BABBAGE_FEC_PHY_RESET (1*32 + 14) /* GPIO_2_14 */
+#define BABBAGE_POWER_KEY (1*32 + 21) /* GPIO_2_21 */
/* USB_CTRL_1 */
#define MX51_USB_CTRL_1_OFFSET 0x10
@@ -46,6 +49,21 @@
#define MX51_USB_PLL_DIV_19_2_MHZ 0x01
#define MX51_USB_PLL_DIV_24_MHZ 0x02
+static struct gpio_keys_button babbage_buttons[] = {
+ {
+ .gpio = BABBAGE_POWER_KEY,
+ .code = BTN_0,
+ .desc = "PWR",
+ .active_low = 1,
+ .wakeup = 1,
+ },
+};
+
+static const struct gpio_keys_platform_data imx_button_data __initconst = {
+ .buttons = babbage_buttons,
+ .nbuttons = ARRAY_SIZE(babbage_buttons),
+};
+
static struct pad_desc mx51babbage_pads[] = {
/* UART1 */
MX51_PAD_UART1_RXD__UART1_RXD,
@@ -281,6 +299,7 @@ __setup("otg_mode=", babbage_otg_mode);
static void __init mxc_board_init(void)
{
struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
+ struct pad_desc power_key = MX51_PAD_EIM_A27__GPIO_2_21;
mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
ARRAY_SIZE(mx51babbage_pads));
@@ -288,6 +307,11 @@ static void __init mxc_board_init(void)
babbage_fec_reset();
imx51_add_fec(NULL);
+ /* Set the PAD settings for the pwr key. */
+ power_key.pad_ctrl = MX51_GPIO_PAD_CTRL_2;
+ mxc_iomux_v3_setup_pad(&power_key);
+ imx51_add_gpio_keys(&imx_button_data);
+
imx51_add_imx_i2c(0, &babbage_i2c_data);
imx51_add_imx_i2c(1, &babbage_i2c_data);
mxc_register_device(&mxc_hsi2c_device, &babbage_hsi2c_data);
diff --git a/arch/arm/mach-mx5/devices-imx51.h b/arch/arm/mach-mx5/devices-imx51.h
index 5cc910e..8c50cb5 100644
--- a/arch/arm/mach-mx5/devices-imx51.h
+++ b/arch/arm/mach-mx5/devices-imx51.h
@@ -13,6 +13,8 @@ extern const struct imx_fec_data imx51_fec_data __initconst;
#define imx51_add_fec(pdata) \
imx_add_fec(&imx51_fec_data, pdata)
+#define imx51_add_gpio_keys(pdata) imx_add_gpio_keys(pdata)
+
extern const struct imx_imx_i2c_data imx51_imx_i2c_data[] __initconst;
#define imx51_add_imx_i2c(id, pdata) \
imx_add_imx_i2c(&imx51_imx_i2c_data[id], pdata)
--
1.6.0.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCHv7 2/3] ARM: mx5: Add gpio-keys to mx51 babbage board
@ 2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
0 siblings, 0 replies; 6+ messages in thread
From: Dinh.Nguyen at freescale.com @ 2010-10-23 14:12 UTC (permalink / raw)
To: linux-arm-kernel
From: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Add functionality for the power button on MX51 Babbage board.
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
---
arch/arm/configs/mx51_defconfig | 1 +
arch/arm/mach-mx5/board-mx51_babbage.c | 24 ++++++++++++++++++++++++
arch/arm/mach-mx5/devices-imx51.h | 2 ++
3 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/arch/arm/configs/mx51_defconfig b/arch/arm/configs/mx51_defconfig
index 163cfee..5c7a872 100644
--- a/arch/arm/configs/mx51_defconfig
+++ b/arch/arm/configs/mx51_defconfig
@@ -82,6 +82,7 @@ CONFIG_FEC=y
CONFIG_INPUT_FF_MEMLESS=m
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_EVDEV=y
+CONFIG_KEYBOARD_GPIO=y
CONFIG_INPUT_EVBUG=m
CONFIG_MOUSE_PS2=m
CONFIG_MOUSE_PS2_ELANTECH=y
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index 23ee4a4..276a1fb 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -18,6 +18,8 @@
#include <linux/io.h>
#include <linux/fsl_devices.h>
#include <linux/fec.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
#include <mach/common.h>
#include <mach/hardware.h>
@@ -37,6 +39,7 @@
#define BABBAGE_USBH1_STP (0*32 + 27) /* GPIO_1_27 */
#define BABBAGE_PHY_RESET (1*32 + 5) /* GPIO_2_5 */
#define BABBAGE_FEC_PHY_RESET (1*32 + 14) /* GPIO_2_14 */
+#define BABBAGE_POWER_KEY (1*32 + 21) /* GPIO_2_21 */
/* USB_CTRL_1 */
#define MX51_USB_CTRL_1_OFFSET 0x10
@@ -46,6 +49,21 @@
#define MX51_USB_PLL_DIV_19_2_MHZ 0x01
#define MX51_USB_PLL_DIV_24_MHZ 0x02
+static struct gpio_keys_button babbage_buttons[] = {
+ {
+ .gpio = BABBAGE_POWER_KEY,
+ .code = BTN_0,
+ .desc = "PWR",
+ .active_low = 1,
+ .wakeup = 1,
+ },
+};
+
+static const struct gpio_keys_platform_data imx_button_data __initconst = {
+ .buttons = babbage_buttons,
+ .nbuttons = ARRAY_SIZE(babbage_buttons),
+};
+
static struct pad_desc mx51babbage_pads[] = {
/* UART1 */
MX51_PAD_UART1_RXD__UART1_RXD,
@@ -281,6 +299,7 @@ __setup("otg_mode=", babbage_otg_mode);
static void __init mxc_board_init(void)
{
struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
+ struct pad_desc power_key = MX51_PAD_EIM_A27__GPIO_2_21;
mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
ARRAY_SIZE(mx51babbage_pads));
@@ -288,6 +307,11 @@ static void __init mxc_board_init(void)
babbage_fec_reset();
imx51_add_fec(NULL);
+ /* Set the PAD settings for the pwr key. */
+ power_key.pad_ctrl = MX51_GPIO_PAD_CTRL_2;
+ mxc_iomux_v3_setup_pad(&power_key);
+ imx51_add_gpio_keys(&imx_button_data);
+
imx51_add_imx_i2c(0, &babbage_i2c_data);
imx51_add_imx_i2c(1, &babbage_i2c_data);
mxc_register_device(&mxc_hsi2c_device, &babbage_hsi2c_data);
diff --git a/arch/arm/mach-mx5/devices-imx51.h b/arch/arm/mach-mx5/devices-imx51.h
index 5cc910e..8c50cb5 100644
--- a/arch/arm/mach-mx5/devices-imx51.h
+++ b/arch/arm/mach-mx5/devices-imx51.h
@@ -13,6 +13,8 @@ extern const struct imx_fec_data imx51_fec_data __initconst;
#define imx51_add_fec(pdata) \
imx_add_fec(&imx51_fec_data, pdata)
+#define imx51_add_gpio_keys(pdata) imx_add_gpio_keys(pdata)
+
extern const struct imx_imx_i2c_data imx51_imx_i2c_data[] __initconst;
#define imx51_add_imx_i2c(id, pdata) \
imx_add_imx_i2c(&imx51_imx_i2c_data[id], pdata)
--
1.6.0.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCHv7 3/3] ARM: imx: Add wake functionality to GPIO
2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
@ 2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
-1 siblings, 0 replies; 6+ messages in thread
From: Dinh.Nguyen @ 2010-10-23 14:12 UTC (permalink / raw)
To: linux-kernel
Cc: linux-arm-kernel, linux, s.hauer, u.kleine-koenig,
valentin.longchamp, daniel, grant.likely, amit.kucheria,
Dinh Nguyen
From: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Add function definition for irq_chip.set_wake to enable GPIO to
wake-up the system.
This patch has been tested on a MX51 Babbage system that had suspend
code implemented. The set_wake implementation is necessary for a
GPIO to wake up a system from suspend.
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
---
arch/arm/plat-mxc/gpio.c | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c
index 9d38da0..9c3e362 100644
--- a/arch/arm/plat-mxc/gpio.c
+++ b/arch/arm/plat-mxc/gpio.c
@@ -20,6 +20,7 @@
*/
#include <linux/init.h>
+#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/gpio.h>
@@ -201,11 +202,42 @@ static void mx2_gpio_irq_handler(u32 irq, struct irq_desc *desc)
}
}
+/*
+ * Set interrupt number "irq" in the GPIO as a wake-up source.
+ * While system is running, all registered GPIO interrupts need to have
+ * wake-up enabled. When system is suspended, only selected GPIO interrupts
+ * need to have wake-up enabled.
+ * @param irq interrupt source number
+ * @param enable enable as wake-up if equal to non-zero
+ * @return This function returns 0 on success.
+ */
+static int gpio_set_wake_irq(u32 irq, u32 enable)
+{
+ u32 gpio = irq_to_gpio(irq);
+ u32 gpio_idx = gpio & 0x1F;
+ struct mxc_gpio_port *port = &mxc_gpio_ports[gpio / 32];
+
+ if (enable) {
+ if (port->irq_high && (gpio_idx >= 16))
+ enable_irq_wake(port->irq_high);
+ else
+ enable_irq_wake(port->irq);
+ } else {
+ if (port->irq_high && (gpio_idx >= 16))
+ disable_irq_wake(port->irq_high);
+ else
+ disable_irq_wake(port->irq);
+ }
+
+ return 0;
+}
+
static struct irq_chip gpio_irq_chip = {
.ack = gpio_ack_irq,
.mask = gpio_mask_irq,
.unmask = gpio_unmask_irq,
.set_type = gpio_set_irq_type,
+ .set_wake = gpio_set_wake_irq,
};
static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset,
--
1.6.0.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCHv7 3/3] ARM: imx: Add wake functionality to GPIO
@ 2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
0 siblings, 0 replies; 6+ messages in thread
From: Dinh.Nguyen at freescale.com @ 2010-10-23 14:12 UTC (permalink / raw)
To: linux-arm-kernel
From: Dinh Nguyen <Dinh.Nguyen@freescale.com>
Add function definition for irq_chip.set_wake to enable GPIO to
wake-up the system.
This patch has been tested on a MX51 Babbage system that had suspend
code implemented. The set_wake implementation is necessary for a
GPIO to wake up a system from suspend.
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>
---
arch/arm/plat-mxc/gpio.c | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c
index 9d38da0..9c3e362 100644
--- a/arch/arm/plat-mxc/gpio.c
+++ b/arch/arm/plat-mxc/gpio.c
@@ -20,6 +20,7 @@
*/
#include <linux/init.h>
+#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/gpio.h>
@@ -201,11 +202,42 @@ static void mx2_gpio_irq_handler(u32 irq, struct irq_desc *desc)
}
}
+/*
+ * Set interrupt number "irq" in the GPIO as a wake-up source.
+ * While system is running, all registered GPIO interrupts need to have
+ * wake-up enabled. When system is suspended, only selected GPIO interrupts
+ * need to have wake-up enabled.
+ * @param irq interrupt source number
+ * @param enable enable as wake-up if equal to non-zero
+ * @return This function returns 0 on success.
+ */
+static int gpio_set_wake_irq(u32 irq, u32 enable)
+{
+ u32 gpio = irq_to_gpio(irq);
+ u32 gpio_idx = gpio & 0x1F;
+ struct mxc_gpio_port *port = &mxc_gpio_ports[gpio / 32];
+
+ if (enable) {
+ if (port->irq_high && (gpio_idx >= 16))
+ enable_irq_wake(port->irq_high);
+ else
+ enable_irq_wake(port->irq);
+ } else {
+ if (port->irq_high && (gpio_idx >= 16))
+ disable_irq_wake(port->irq_high);
+ else
+ disable_irq_wake(port->irq);
+ }
+
+ return 0;
+}
+
static struct irq_chip gpio_irq_chip = {
.ack = gpio_ack_irq,
.mask = gpio_mask_irq,
.unmask = gpio_unmask_irq,
.set_type = gpio_set_irq_type,
+ .set_wake = gpio_set_wake_irq,
};
static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset,
--
1.6.0.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
end of thread, other threads:[~2010-10-23 14:12 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-10-23 14:12 [PATCHv7 1/3] ARM: imx: Add gpio-keys to plat-mxc Dinh.Nguyen
2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
2010-10-23 14:12 ` [PATCHv7 2/3] ARM: mx5: Add gpio-keys to mx51 babbage board Dinh.Nguyen
2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
2010-10-23 14:12 ` [PATCHv7 3/3] ARM: imx: Add wake functionality to GPIO Dinh.Nguyen
2010-10-23 14:12 ` Dinh.Nguyen at freescale.com
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