korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-20 02:34:23 +08:00
Code Issues Packages Projects Releases Wiki Activity
5e393a2227
linux/drivers/gpio/gpio-lpc32xx.c
Linus Torvalds dff8360a4a So this is the LW GPIO patch stack for v3.7: 
- refactoring from Thierry Redding at Arnd Bergmann's request to use
   the seq_file iterator interface in gpiolib.
 - A new driver for Avionic Design's N-bit GPIO expander.
 - Two instances of mutexes replaced by spinlocks from Axel Lin to
   code that is supposed to be fastpath compliant.
 - IRQ demuxer and gpio_to_irq() support for pcf857x by Kuninori
   Morimoto.
 - Dynamic GPIO numbers, device tree support, daisy chaining and some
   other fixes for the 74x164 driver by Maxime Ripard.
 - IRQ domain and device tree support for the tc3589x driver by
   Lee Jones.
 - Some conversion to use managed resources devm_* code.
 - Some instances of clk_prepare() or clk_prepare_enable() added to
   support the new, stricter common clock framework.
 - Some for_each_set_bit() simplifications.
 - Then a lot of fixes as we fixed up all of the above tripping over
   our own shoelaces and that kind of thing.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJQafMcAAoJEEEQszewGV1znvsP/2CZusf05+XiCHZO7LGsBo+h
 WrVNB/XxrpgW7EEqpTPJCh2leM/hXs1uOYoQq0v8ICEJLwdIox8jYsnPL7NUWpN4
 mcM9YCqH65Ljt07Ec25bTRzkIy881nYfvK7nUo7DZH8sq2eX53Vxqkr/IS3ZKQVj
 T1Kd7GHmfje2FrnL5O0owT3zNHE9VmHm1Ct9DRCRP/U2i8CSAFERJgBsoslrut13
 Cnvkvwbj9Q2LQy+kIBt3PIlKb37u1Uucqa8uExvMV9cSAzG7X9h++wSgm2RioSsR
 mYrCRn19qzz7EATh4yUKHe56mx0KNl+/0vapqBuziTy+r0oi40VEoiSzKyfSnhFy
 MYgiVVnWIH9dhOTP/0QSbrYsPEeT/ZlcJKp6uu1o1MR6z3f3058Sc6FTCzeGcW88
 Ayh0kT0e8iLsQ+tRmjFEEEALLKSL9Q7StH2az7Awkve3L9JCVUVXaJwynjcSIC29
 8sbAV+ENTYaKOGV8uMRH+s/WpKN6w9G2gZ/qhlXem9r4/Rd529wGBlH1or8A7uLf
 cNuaSquN3TM5O1i26K3+rEKp5Sd7+RIMpQCMsuiEpQd1UnbB2Z1X4xjjLYwKqHFj
 fVQtu7s7tQ/o/hYzTn9hP4Cqj4SDB+EaDmAqq0yJH2DNsUtvLLug62ekatvvejc/
 6HFuiVOYkigSRbl7sDoV
 =jbUM
 -----END PGP SIGNATURE-----

Merge tag 'gpio-for-v3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO changes from Linus Walleij:
 "So this is the LW GPIO patch stack for v3.7:
   - refactoring from Thierry Redding at Arnd Bergmann's request to use
     the seq_file iterator interface in gpiolib.
   - A new driver for Avionic Design's N-bit GPIO expander.
   - Two instances of mutexes replaced by spinlocks from Axel Lin to
     code that is supposed to be fastpath compliant.
   - IRQ demuxer and gpio_to_irq() support for pcf857x by Kuninori
     Morimoto.
   - Dynamic GPIO numbers, device tree support, daisy chaining and some
     other fixes for the 74x164 driver by Maxime Ripard.
   - IRQ domain and device tree support for the tc3589x driver by Lee
     Jones.
   - Some conversion to use managed resources devm_* code.
   - Some instances of clk_prepare() or clk_prepare_enable() added to
     support the new, stricter common clock framework.
   - Some for_each_set_bit() simplifications.
   - Then a lot of fixes as we fixed up all of the above tripping over
     our own shoelaces and that kind of thing."

* tag 'gpio-for-v3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (34 commits)
  gpio: pcf857x: select IRQ_DOMAIN
  gpio: Document device_node's det_debounce
  gpio-lpc32xx: Add GPI_28
  gpio: adnp: dt: Reference generic interrupt binding
  gpio: Add Avionic Design N-bit GPIO expander support
  gpio: pxa: using for_each_set_bit to simplify the code
  gpio_msm: using for_each_set_bit to simplify the code
  gpio: Enable the tc3298x GPIO expander driver for Device Tree
  gpio: Provide the tc3589x GPIO expander driver with an IRQ domain
  ARM: shmobile: kzm9g: use gpio-keys instead of gpio-keys-polled
  gpio: pcf857x: fixup smatch WARNING
  gpio: 74x164: Add support for the daisy-chaining
  gpio: 74x164: dts: Add documentation for the dt binding
  dt: Fix incorrect reference in gpio-led documentation
  gpio: 74x164: Add device tree support
  gpio: 74x164: Use dynamic gpio number assignment if no pdata is present
  gpio: 74x164: Use devm_kzalloc
  gpio: 74x164: Use module_spi_driver boiler plate function
  gpio: sx150x: Use irq_data_get_irq_chip_data() at appropriate places
  gpio: em: Use irq_data_get_irq_chip_data() at appropriate places
  ...
2012-10-02 16:05:10 -07:00

578 lines
15 KiB
C
Raw Blame History

/*
* GPIO driver for LPC32xx SoC
*
* Author: Kevin Wells <kevin.wells@nxp.com>
*
* Copyright (C) 2010 NXP Semiconductors
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include <mach/gpio-lpc32xx.h>
#include <mach/irqs.h>
#define LPC32XX_GPIO_P3_INP_STATE _GPREG(0x000)
#define LPC32XX_GPIO_P3_OUTP_SET _GPREG(0x004)
#define LPC32XX_GPIO_P3_OUTP_CLR _GPREG(0x008)
#define LPC32XX_GPIO_P3_OUTP_STATE _GPREG(0x00C)
#define LPC32XX_GPIO_P2_DIR_SET _GPREG(0x010)
#define LPC32XX_GPIO_P2_DIR_CLR _GPREG(0x014)
#define LPC32XX_GPIO_P2_DIR_STATE _GPREG(0x018)
#define LPC32XX_GPIO_P2_INP_STATE _GPREG(0x01C)
#define LPC32XX_GPIO_P2_OUTP_SET _GPREG(0x020)
#define LPC32XX_GPIO_P2_OUTP_CLR _GPREG(0x024)
#define LPC32XX_GPIO_P2_MUX_SET _GPREG(0x028)
#define LPC32XX_GPIO_P2_MUX_CLR _GPREG(0x02C)
#define LPC32XX_GPIO_P2_MUX_STATE _GPREG(0x030)
#define LPC32XX_GPIO_P0_INP_STATE _GPREG(0x040)
#define LPC32XX_GPIO_P0_OUTP_SET _GPREG(0x044)
#define LPC32XX_GPIO_P0_OUTP_CLR _GPREG(0x048)
#define LPC32XX_GPIO_P0_OUTP_STATE _GPREG(0x04C)
#define LPC32XX_GPIO_P0_DIR_SET _GPREG(0x050)
#define LPC32XX_GPIO_P0_DIR_CLR _GPREG(0x054)
#define LPC32XX_GPIO_P0_DIR_STATE _GPREG(0x058)
#define LPC32XX_GPIO_P1_INP_STATE _GPREG(0x060)
#define LPC32XX_GPIO_P1_OUTP_SET _GPREG(0x064)
#define LPC32XX_GPIO_P1_OUTP_CLR _GPREG(0x068)
#define LPC32XX_GPIO_P1_OUTP_STATE _GPREG(0x06C)
#define LPC32XX_GPIO_P1_DIR_SET _GPREG(0x070)
#define LPC32XX_GPIO_P1_DIR_CLR _GPREG(0x074)
#define LPC32XX_GPIO_P1_DIR_STATE _GPREG(0x078)
#define GPIO012_PIN_TO_BIT(x) (1 << (x))
#define GPIO3_PIN_TO_BIT(x) (1 << ((x) + 25))
#define GPO3_PIN_TO_BIT(x) (1 << (x))
#define GPIO012_PIN_IN_SEL(x, y) (((x) >> (y)) & 1)
#define GPIO3_PIN_IN_SHIFT(x) ((x) == 5 ? 24 : 10 + (x))
#define GPIO3_PIN_IN_SEL(x, y) (((x) >> GPIO3_PIN_IN_SHIFT(y)) & 1)
#define GPIO3_PIN5_IN_SEL(x) (((x) >> 24) & 1)
#define GPI3_PIN_IN_SEL(x, y) (((x) >> (y)) & 1)
#define GPO3_PIN_IN_SEL(x, y) (((x) >> (y)) & 1)
struct gpio_regs {
void __iomem *inp_state;
void __iomem *outp_state;
void __iomem *outp_set;
void __iomem *outp_clr;
void __iomem *dir_set;
void __iomem *dir_clr;
};
/*
* GPIO names
*/
static const char *gpio_p0_names[LPC32XX_GPIO_P0_MAX] = {
"p0.0", "p0.1", "p0.2", "p0.3",
"p0.4", "p0.5", "p0.6", "p0.7"
};
static const char *gpio_p1_names[LPC32XX_GPIO_P1_MAX] = {
"p1.0", "p1.1", "p1.2", "p1.3",
"p1.4", "p1.5", "p1.6", "p1.7",
"p1.8", "p1.9", "p1.10", "p1.11",
"p1.12", "p1.13", "p1.14", "p1.15",
"p1.16", "p1.17", "p1.18", "p1.19",
"p1.20", "p1.21", "p1.22", "p1.23",
};
static const char *gpio_p2_names[LPC32XX_GPIO_P2_MAX] = {
"p2.0", "p2.1", "p2.2", "p2.3",
"p2.4", "p2.5", "p2.6", "p2.7",
"p2.8", "p2.9", "p2.10", "p2.11",
"p2.12"
};
static const char *gpio_p3_names[LPC32XX_GPIO_P3_MAX] = {
"gpio00", "gpio01", "gpio02", "gpio03",
"gpio04", "gpio05"
};
static const char *gpi_p3_names[LPC32XX_GPI_P3_MAX] = {
"gpi00", "gpi01", "gpi02", "gpi03",
"gpi04", "gpi05", "gpi06", "gpi07",
"gpi08", "gpi09", NULL, NULL,
NULL, NULL, NULL, "gpi15",
"gpi16", "gpi17", "gpi18", "gpi19",
"gpi20", "gpi21", "gpi22", "gpi23",
"gpi24", "gpi25", "gpi26", "gpi27",
"gpi28"
};
static const char *gpo_p3_names[LPC32XX_GPO_P3_MAX] = {
"gpo00", "gpo01", "gpo02", "gpo03",
"gpo04", "gpo05", "gpo06", "gpo07",
"gpo08", "gpo09", "gpo10", "gpo11",
"gpo12", "gpo13", "gpo14", "gpo15",
"gpo16", "gpo17", "gpo18", "gpo19",
"gpo20", "gpo21", "gpo22", "gpo23"
};
static struct gpio_regs gpio_grp_regs_p0 = {
.inp_state = LPC32XX_GPIO_P0_INP_STATE,
.outp_set = LPC32XX_GPIO_P0_OUTP_SET,
.outp_clr = LPC32XX_GPIO_P0_OUTP_CLR,
.dir_set = LPC32XX_GPIO_P0_DIR_SET,
.dir_clr = LPC32XX_GPIO_P0_DIR_CLR,
};
static struct gpio_regs gpio_grp_regs_p1 = {
.inp_state = LPC32XX_GPIO_P1_INP_STATE,
.outp_set = LPC32XX_GPIO_P1_OUTP_SET,
.outp_clr = LPC32XX_GPIO_P1_OUTP_CLR,
.dir_set = LPC32XX_GPIO_P1_DIR_SET,
.dir_clr = LPC32XX_GPIO_P1_DIR_CLR,
};
static struct gpio_regs gpio_grp_regs_p2 = {
.inp_state = LPC32XX_GPIO_P2_INP_STATE,
.outp_set = LPC32XX_GPIO_P2_OUTP_SET,
.outp_clr = LPC32XX_GPIO_P2_OUTP_CLR,
.dir_set = LPC32XX_GPIO_P2_DIR_SET,
.dir_clr = LPC32XX_GPIO_P2_DIR_CLR,
};
static struct gpio_regs gpio_grp_regs_p3 = {
.inp_state = LPC32XX_GPIO_P3_INP_STATE,
.outp_state = LPC32XX_GPIO_P3_OUTP_STATE,
.outp_set = LPC32XX_GPIO_P3_OUTP_SET,
.outp_clr = LPC32XX_GPIO_P3_OUTP_CLR,
.dir_set = LPC32XX_GPIO_P2_DIR_SET,
.dir_clr = LPC32XX_GPIO_P2_DIR_CLR,
};
struct lpc32xx_gpio_chip {
struct gpio_chip chip;
struct gpio_regs *gpio_grp;
};
static inline struct lpc32xx_gpio_chip *to_lpc32xx_gpio(
struct gpio_chip *gpc)
{
return container_of(gpc, struct lpc32xx_gpio_chip, chip);
}
static void __set_gpio_dir_p012(struct lpc32xx_gpio_chip *group,
unsigned pin, int input)
{
if (input)
__raw_writel(GPIO012_PIN_TO_BIT(pin),
group->gpio_grp->dir_clr);
else
__raw_writel(GPIO012_PIN_TO_BIT(pin),
group->gpio_grp->dir_set);
}
static void __set_gpio_dir_p3(struct lpc32xx_gpio_chip *group,
unsigned pin, int input)
{
u32 u = GPIO3_PIN_TO_BIT(pin);
if (input)
__raw_writel(u, group->gpio_grp->dir_clr);
else
__raw_writel(u, group->gpio_grp->dir_set);
}
static void __set_gpio_level_p012(struct lpc32xx_gpio_chip *group,
unsigned pin, int high)
{
if (high)
__raw_writel(GPIO012_PIN_TO_BIT(pin),
group->gpio_grp->outp_set);
else
__raw_writel(GPIO012_PIN_TO_BIT(pin),
group->gpio_grp->outp_clr);
}
static void __set_gpio_level_p3(struct lpc32xx_gpio_chip *group,
unsigned pin, int high)
{
u32 u = GPIO3_PIN_TO_BIT(pin);
if (high)
__raw_writel(u, group->gpio_grp->outp_set);
else
__raw_writel(u, group->gpio_grp->outp_clr);
}
static void __set_gpo_level_p3(struct lpc32xx_gpio_chip *group,
unsigned pin, int high)
{
if (high)
__raw_writel(GPO3_PIN_TO_BIT(pin), group->gpio_grp->outp_set);
else
__raw_writel(GPO3_PIN_TO_BIT(pin), group->gpio_grp->outp_clr);
}
static int __get_gpio_state_p012(struct lpc32xx_gpio_chip *group,
unsigned pin)
{
return GPIO012_PIN_IN_SEL(__raw_readl(group->gpio_grp->inp_state),
pin);
}
static int __get_gpio_state_p3(struct lpc32xx_gpio_chip *group,
unsigned pin)
{
int state = __raw_readl(group->gpio_grp->inp_state);
/*
* P3 GPIO pin input mapping is not contiguous, GPIOP3-0..4 is mapped
* to bits 10..14, while GPIOP3-5 is mapped to bit 24.
*/
return GPIO3_PIN_IN_SEL(state, pin);
}
static int __get_gpi_state_p3(struct lpc32xx_gpio_chip *group,
unsigned pin)
{
return GPI3_PIN_IN_SEL(__raw_readl(group->gpio_grp->inp_state), pin);
}
static int __get_gpo_state_p3(struct lpc32xx_gpio_chip *group,
unsigned pin)
{
return GPO3_PIN_IN_SEL(__raw_readl(group->gpio_grp->outp_state), pin);
}
/*
* GENERIC_GPIO primitives.
*/
static int lpc32xx_gpio_dir_input_p012(struct gpio_chip *chip,
unsigned pin)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
__set_gpio_dir_p012(group, pin, 1);
return 0;
}
static int lpc32xx_gpio_dir_input_p3(struct gpio_chip *chip,
unsigned pin)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
__set_gpio_dir_p3(group, pin, 1);
return 0;
}
static int lpc32xx_gpio_dir_in_always(struct gpio_chip *chip,
unsigned pin)
{
return 0;
}
static int lpc32xx_gpio_get_value_p012(struct gpio_chip *chip, unsigned pin)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
return __get_gpio_state_p012(group, pin);
}
static int lpc32xx_gpio_get_value_p3(struct gpio_chip *chip, unsigned pin)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
return __get_gpio_state_p3(group, pin);
}
static int lpc32xx_gpi_get_value(struct gpio_chip *chip, unsigned pin)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
return __get_gpi_state_p3(group, pin);
}
static int lpc32xx_gpio_dir_output_p012(struct gpio_chip *chip, unsigned pin,
int value)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
__set_gpio_level_p012(group, pin, value);
__set_gpio_dir_p012(group, pin, 0);
return 0;
}
static int lpc32xx_gpio_dir_output_p3(struct gpio_chip *chip, unsigned pin,
int value)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
__set_gpio_level_p3(group, pin, value);
__set_gpio_dir_p3(group, pin, 0);
return 0;
}
static int lpc32xx_gpio_dir_out_always(struct gpio_chip *chip, unsigned pin,
int value)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
__set_gpo_level_p3(group, pin, value);
return 0;
}
static void lpc32xx_gpio_set_value_p012(struct gpio_chip *chip, unsigned pin,
int value)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
__set_gpio_level_p012(group, pin, value);
}
static void lpc32xx_gpio_set_value_p3(struct gpio_chip *chip, unsigned pin,
int value)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
__set_gpio_level_p3(group, pin, value);
}
static void lpc32xx_gpo_set_value(struct gpio_chip *chip, unsigned pin,
int value)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
__set_gpo_level_p3(group, pin, value);
}
static int lpc32xx_gpo_get_value(struct gpio_chip *chip, unsigned pin)
{
struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
return __get_gpo_state_p3(group, pin);
}
static int lpc32xx_gpio_request(struct gpio_chip *chip, unsigned pin)
{
if (pin < chip->ngpio)
return 0;
return -EINVAL;
}
static int lpc32xx_gpio_to_irq_p01(struct gpio_chip *chip, unsigned offset)
{
return IRQ_LPC32XX_P0_P1_IRQ;
}
static const char lpc32xx_gpio_to_irq_gpio_p3_table[] = {
IRQ_LPC32XX_GPIO_00,
IRQ_LPC32XX_GPIO_01,
IRQ_LPC32XX_GPIO_02,
IRQ_LPC32XX_GPIO_03,
IRQ_LPC32XX_GPIO_04,
IRQ_LPC32XX_GPIO_05,
};
static int lpc32xx_gpio_to_irq_gpio_p3(struct gpio_chip *chip, unsigned offset)
{
if (offset < ARRAY_SIZE(lpc32xx_gpio_to_irq_gpio_p3_table))
return lpc32xx_gpio_to_irq_gpio_p3_table[offset];
return -ENXIO;
}
static const char lpc32xx_gpio_to_irq_gpi_p3_table[] = {
IRQ_LPC32XX_GPI_00,
IRQ_LPC32XX_GPI_01,
IRQ_LPC32XX_GPI_02,
IRQ_LPC32XX_GPI_03,
IRQ_LPC32XX_GPI_04,
IRQ_LPC32XX_GPI_05,
IRQ_LPC32XX_GPI_06,
IRQ_LPC32XX_GPI_07,
IRQ_LPC32XX_GPI_08,
IRQ_LPC32XX_GPI_09,
-ENXIO, /* 10 */
-ENXIO, /* 11 */
-ENXIO, /* 12 */
-ENXIO, /* 13 */
-ENXIO, /* 14 */
-ENXIO, /* 15 */
-ENXIO, /* 16 */
-ENXIO, /* 17 */
-ENXIO, /* 18 */
IRQ_LPC32XX_GPI_19,
-ENXIO, /* 20 */
-ENXIO, /* 21 */
-ENXIO, /* 22 */
-ENXIO, /* 23 */
-ENXIO, /* 24 */
-ENXIO, /* 25 */
-ENXIO, /* 26 */
-ENXIO, /* 27 */
IRQ_LPC32XX_GPI_28,
};
static int lpc32xx_gpio_to_irq_gpi_p3(struct gpio_chip *chip, unsigned offset)
{
if (offset < ARRAY_SIZE(lpc32xx_gpio_to_irq_gpi_p3_table))
return lpc32xx_gpio_to_irq_gpi_p3_table[offset];
return -ENXIO;
}
static struct lpc32xx_gpio_chip lpc32xx_gpiochip[] = {
{
.chip = {
.label = "gpio_p0",
.direction_input = lpc32xx_gpio_dir_input_p012,
.get = lpc32xx_gpio_get_value_p012,
.direction_output = lpc32xx_gpio_dir_output_p012,
.set = lpc32xx_gpio_set_value_p012,
.request = lpc32xx_gpio_request,
.to_irq = lpc32xx_gpio_to_irq_p01,
.base = LPC32XX_GPIO_P0_GRP,
.ngpio = LPC32XX_GPIO_P0_MAX,
.names = gpio_p0_names,
.can_sleep = 0,
},
.gpio_grp = &gpio_grp_regs_p0,
},
{
.chip = {
.label = "gpio_p1",
.direction_input = lpc32xx_gpio_dir_input_p012,
.get = lpc32xx_gpio_get_value_p012,
.direction_output = lpc32xx_gpio_dir_output_p012,
.set = lpc32xx_gpio_set_value_p012,
.request = lpc32xx_gpio_request,
.to_irq = lpc32xx_gpio_to_irq_p01,
.base = LPC32XX_GPIO_P1_GRP,
.ngpio = LPC32XX_GPIO_P1_MAX,
.names = gpio_p1_names,
.can_sleep = 0,
},
.gpio_grp = &gpio_grp_regs_p1,
},
{
.chip = {
.label = "gpio_p2",
.direction_input = lpc32xx_gpio_dir_input_p012,
.get = lpc32xx_gpio_get_value_p012,
.direction_output = lpc32xx_gpio_dir_output_p012,
.set = lpc32xx_gpio_set_value_p012,
.request = lpc32xx_gpio_request,
.base = LPC32XX_GPIO_P2_GRP,
.ngpio = LPC32XX_GPIO_P2_MAX,
.names = gpio_p2_names,
.can_sleep = 0,
},
.gpio_grp = &gpio_grp_regs_p2,
},
{
.chip = {
.label = "gpio_p3",
.direction_input = lpc32xx_gpio_dir_input_p3,
.get = lpc32xx_gpio_get_value_p3,
.direction_output = lpc32xx_gpio_dir_output_p3,
.set = lpc32xx_gpio_set_value_p3,
.request = lpc32xx_gpio_request,
.to_irq = lpc32xx_gpio_to_irq_gpio_p3,
.base = LPC32XX_GPIO_P3_GRP,
.ngpio = LPC32XX_GPIO_P3_MAX,
.names = gpio_p3_names,
.can_sleep = 0,
},
.gpio_grp = &gpio_grp_regs_p3,
},
{
.chip = {
.label = "gpi_p3",
.direction_input = lpc32xx_gpio_dir_in_always,
.get = lpc32xx_gpi_get_value,
.request = lpc32xx_gpio_request,
.to_irq = lpc32xx_gpio_to_irq_gpi_p3,
.base = LPC32XX_GPI_P3_GRP,
.ngpio = LPC32XX_GPI_P3_MAX,
.names = gpi_p3_names,
.can_sleep = 0,
},
.gpio_grp = &gpio_grp_regs_p3,
},
{
.chip = {
.label = "gpo_p3",
.direction_output = lpc32xx_gpio_dir_out_always,
.set = lpc32xx_gpo_set_value,
.get = lpc32xx_gpo_get_value,
.request = lpc32xx_gpio_request,
.base = LPC32XX_GPO_P3_GRP,
.ngpio = LPC32XX_GPO_P3_MAX,
.names = gpo_p3_names,
.can_sleep = 0,
},
.gpio_grp = &gpio_grp_regs_p3,
},
};
static int lpc32xx_of_xlate(struct gpio_chip *gc,
const struct of_phandle_args *gpiospec, u32 *flags)
{
/* Is this the correct bank? */
u32 bank = gpiospec->args[0];
if ((bank > ARRAY_SIZE(lpc32xx_gpiochip) ||
(gc != &lpc32xx_gpiochip[bank].chip)))
return -EINVAL;
if (flags)
*flags = gpiospec->args[2];
return gpiospec->args[1];
}
static int __devinit lpc32xx_gpio_probe(struct platform_device *pdev)
{
int i;
for (i = 0; i < ARRAY_SIZE(lpc32xx_gpiochip); i++) {
if (pdev->dev.of_node) {
lpc32xx_gpiochip[i].chip.of_xlate = lpc32xx_of_xlate;
lpc32xx_gpiochip[i].chip.of_gpio_n_cells = 3;
lpc32xx_gpiochip[i].chip.of_node = pdev->dev.of_node;
}
gpiochip_add(&lpc32xx_gpiochip[i].chip);
}
return 0;
}
#ifdef CONFIG_OF
static struct of_device_id lpc32xx_gpio_of_match[] __devinitdata = {
{ .compatible = "nxp,lpc3220-gpio", },
{ },
};
#endif
static struct platform_driver lpc32xx_gpio_driver = {
.driver = {
.name = "lpc32xx-gpio",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(lpc32xx_gpio_of_match),
},
.probe = lpc32xx_gpio_probe,
};
module_platform_driver(lpc32xx_gpio_driver);
Reference in New Issue View Git Blame Copy Permalink