mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
2ee38d4de5
The irqdomain conversion failed to notice that we do not always have a DT node to dereference, fix this up by using a simple dev_err() that also tells the name of the device. Cc: Loic Pallardy <loic.pallardy@st.com> Cc: Patrice Chotard <patrice.chotard@stericsson.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1802 lines
45 KiB
C
1802 lines
45 KiB
C
/*
|
|
* Generic GPIO driver for logic cells found in the Nomadik SoC
|
|
*
|
|
* Copyright (C) 2008,2009 STMicroelectronics
|
|
* Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
|
|
* Rewritten based on work by Prafulla WADASKAR <prafulla.wadaskar@st.com>
|
|
* Copyright (C) 2011 Linus Walleij <linus.walleij@linaro.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/pinctrl/pinctrl.h>
|
|
#include <linux/pinctrl/pinmux.h>
|
|
#include <linux/pinctrl/pinconf.h>
|
|
/* Since we request GPIOs from ourself */
|
|
#include <linux/pinctrl/consumer.h>
|
|
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include <plat/pincfg.h>
|
|
#include <plat/gpio-nomadik.h>
|
|
|
|
#include "pinctrl-nomadik.h"
|
|
|
|
/*
|
|
* The GPIO module in the Nomadik family of Systems-on-Chip is an
|
|
* AMBA device, managing 32 pins and alternate functions. The logic block
|
|
* is currently used in the Nomadik and ux500.
|
|
*
|
|
* Symbols in this file are called "nmk_gpio" for "nomadik gpio"
|
|
*/
|
|
|
|
#define NMK_GPIO_PER_CHIP 32
|
|
|
|
struct nmk_gpio_chip {
|
|
struct gpio_chip chip;
|
|
struct irq_domain *domain;
|
|
void __iomem *addr;
|
|
struct clk *clk;
|
|
unsigned int bank;
|
|
unsigned int parent_irq;
|
|
int secondary_parent_irq;
|
|
u32 (*get_secondary_status)(unsigned int bank);
|
|
void (*set_ioforce)(bool enable);
|
|
spinlock_t lock;
|
|
bool sleepmode;
|
|
/* Keep track of configured edges */
|
|
u32 edge_rising;
|
|
u32 edge_falling;
|
|
u32 real_wake;
|
|
u32 rwimsc;
|
|
u32 fwimsc;
|
|
u32 rimsc;
|
|
u32 fimsc;
|
|
u32 pull_up;
|
|
u32 lowemi;
|
|
};
|
|
|
|
struct nmk_pinctrl {
|
|
struct device *dev;
|
|
struct pinctrl_dev *pctl;
|
|
const struct nmk_pinctrl_soc_data *soc;
|
|
};
|
|
|
|
static struct nmk_gpio_chip *
|
|
nmk_gpio_chips[DIV_ROUND_UP(ARCH_NR_GPIOS, NMK_GPIO_PER_CHIP)];
|
|
|
|
static DEFINE_SPINLOCK(nmk_gpio_slpm_lock);
|
|
|
|
#define NUM_BANKS ARRAY_SIZE(nmk_gpio_chips)
|
|
|
|
static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip,
|
|
unsigned offset, int gpio_mode)
|
|
{
|
|
u32 bit = 1 << offset;
|
|
u32 afunc, bfunc;
|
|
|
|
afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit;
|
|
bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit;
|
|
if (gpio_mode & NMK_GPIO_ALT_A)
|
|
afunc |= bit;
|
|
if (gpio_mode & NMK_GPIO_ALT_B)
|
|
bfunc |= bit;
|
|
writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA);
|
|
writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB);
|
|
}
|
|
|
|
static void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip,
|
|
unsigned offset, enum nmk_gpio_slpm mode)
|
|
{
|
|
u32 bit = 1 << offset;
|
|
u32 slpm;
|
|
|
|
slpm = readl(nmk_chip->addr + NMK_GPIO_SLPC);
|
|
if (mode == NMK_GPIO_SLPM_NOCHANGE)
|
|
slpm |= bit;
|
|
else
|
|
slpm &= ~bit;
|
|
writel(slpm, nmk_chip->addr + NMK_GPIO_SLPC);
|
|
}
|
|
|
|
static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip,
|
|
unsigned offset, enum nmk_gpio_pull pull)
|
|
{
|
|
u32 bit = 1 << offset;
|
|
u32 pdis;
|
|
|
|
pdis = readl(nmk_chip->addr + NMK_GPIO_PDIS);
|
|
if (pull == NMK_GPIO_PULL_NONE) {
|
|
pdis |= bit;
|
|
nmk_chip->pull_up &= ~bit;
|
|
} else {
|
|
pdis &= ~bit;
|
|
}
|
|
|
|
writel(pdis, nmk_chip->addr + NMK_GPIO_PDIS);
|
|
|
|
if (pull == NMK_GPIO_PULL_UP) {
|
|
nmk_chip->pull_up |= bit;
|
|
writel(bit, nmk_chip->addr + NMK_GPIO_DATS);
|
|
} else if (pull == NMK_GPIO_PULL_DOWN) {
|
|
nmk_chip->pull_up &= ~bit;
|
|
writel(bit, nmk_chip->addr + NMK_GPIO_DATC);
|
|
}
|
|
}
|
|
|
|
static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip,
|
|
unsigned offset, bool lowemi)
|
|
{
|
|
u32 bit = BIT(offset);
|
|
bool enabled = nmk_chip->lowemi & bit;
|
|
|
|
if (lowemi == enabled)
|
|
return;
|
|
|
|
if (lowemi)
|
|
nmk_chip->lowemi |= bit;
|
|
else
|
|
nmk_chip->lowemi &= ~bit;
|
|
|
|
writel_relaxed(nmk_chip->lowemi,
|
|
nmk_chip->addr + NMK_GPIO_LOWEMI);
|
|
}
|
|
|
|
static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip,
|
|
unsigned offset)
|
|
{
|
|
writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC);
|
|
}
|
|
|
|
static void __nmk_gpio_set_output(struct nmk_gpio_chip *nmk_chip,
|
|
unsigned offset, int val)
|
|
{
|
|
if (val)
|
|
writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATS);
|
|
else
|
|
writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATC);
|
|
}
|
|
|
|
static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip,
|
|
unsigned offset, int val)
|
|
{
|
|
writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS);
|
|
__nmk_gpio_set_output(nmk_chip, offset, val);
|
|
}
|
|
|
|
static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip,
|
|
unsigned offset, int gpio_mode,
|
|
bool glitch)
|
|
{
|
|
u32 rwimsc = nmk_chip->rwimsc;
|
|
u32 fwimsc = nmk_chip->fwimsc;
|
|
|
|
if (glitch && nmk_chip->set_ioforce) {
|
|
u32 bit = BIT(offset);
|
|
|
|
/* Prevent spurious wakeups */
|
|
writel(rwimsc & ~bit, nmk_chip->addr + NMK_GPIO_RWIMSC);
|
|
writel(fwimsc & ~bit, nmk_chip->addr + NMK_GPIO_FWIMSC);
|
|
|
|
nmk_chip->set_ioforce(true);
|
|
}
|
|
|
|
__nmk_gpio_set_mode(nmk_chip, offset, gpio_mode);
|
|
|
|
if (glitch && nmk_chip->set_ioforce) {
|
|
nmk_chip->set_ioforce(false);
|
|
|
|
writel(rwimsc, nmk_chip->addr + NMK_GPIO_RWIMSC);
|
|
writel(fwimsc, nmk_chip->addr + NMK_GPIO_FWIMSC);
|
|
}
|
|
}
|
|
|
|
static void
|
|
nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned offset)
|
|
{
|
|
u32 falling = nmk_chip->fimsc & BIT(offset);
|
|
u32 rising = nmk_chip->rimsc & BIT(offset);
|
|
int gpio = nmk_chip->chip.base + offset;
|
|
int irq = NOMADIK_GPIO_TO_IRQ(gpio);
|
|
struct irq_data *d = irq_get_irq_data(irq);
|
|
|
|
if (!rising && !falling)
|
|
return;
|
|
|
|
if (!d || !irqd_irq_disabled(d))
|
|
return;
|
|
|
|
if (rising) {
|
|
nmk_chip->rimsc &= ~BIT(offset);
|
|
writel_relaxed(nmk_chip->rimsc,
|
|
nmk_chip->addr + NMK_GPIO_RIMSC);
|
|
}
|
|
|
|
if (falling) {
|
|
nmk_chip->fimsc &= ~BIT(offset);
|
|
writel_relaxed(nmk_chip->fimsc,
|
|
nmk_chip->addr + NMK_GPIO_FIMSC);
|
|
}
|
|
|
|
dev_dbg(nmk_chip->chip.dev, "%d: clearing interrupt mask\n", gpio);
|
|
}
|
|
|
|
static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset,
|
|
pin_cfg_t cfg, bool sleep, unsigned int *slpmregs)
|
|
{
|
|
static const char *afnames[] = {
|
|
[NMK_GPIO_ALT_GPIO] = "GPIO",
|
|
[NMK_GPIO_ALT_A] = "A",
|
|
[NMK_GPIO_ALT_B] = "B",
|
|
[NMK_GPIO_ALT_C] = "C"
|
|
};
|
|
static const char *pullnames[] = {
|
|
[NMK_GPIO_PULL_NONE] = "none",
|
|
[NMK_GPIO_PULL_UP] = "up",
|
|
[NMK_GPIO_PULL_DOWN] = "down",
|
|
[3] /* illegal */ = "??"
|
|
};
|
|
static const char *slpmnames[] = {
|
|
[NMK_GPIO_SLPM_INPUT] = "input/wakeup",
|
|
[NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup",
|
|
};
|
|
|
|
int pin = PIN_NUM(cfg);
|
|
int pull = PIN_PULL(cfg);
|
|
int af = PIN_ALT(cfg);
|
|
int slpm = PIN_SLPM(cfg);
|
|
int output = PIN_DIR(cfg);
|
|
int val = PIN_VAL(cfg);
|
|
bool glitch = af == NMK_GPIO_ALT_C;
|
|
|
|
dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n",
|
|
pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm],
|
|
output ? "output " : "input",
|
|
output ? (val ? "high" : "low") : "");
|
|
|
|
if (sleep) {
|
|
int slpm_pull = PIN_SLPM_PULL(cfg);
|
|
int slpm_output = PIN_SLPM_DIR(cfg);
|
|
int slpm_val = PIN_SLPM_VAL(cfg);
|
|
|
|
af = NMK_GPIO_ALT_GPIO;
|
|
|
|
/*
|
|
* The SLPM_* values are normal values + 1 to allow zero to
|
|
* mean "same as normal".
|
|
*/
|
|
if (slpm_pull)
|
|
pull = slpm_pull - 1;
|
|
if (slpm_output)
|
|
output = slpm_output - 1;
|
|
if (slpm_val)
|
|
val = slpm_val - 1;
|
|
|
|
dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n",
|
|
pin,
|
|
slpm_pull ? pullnames[pull] : "same",
|
|
slpm_output ? (output ? "output" : "input") : "same",
|
|
slpm_val ? (val ? "high" : "low") : "same");
|
|
}
|
|
|
|
if (output)
|
|
__nmk_gpio_make_output(nmk_chip, offset, val);
|
|
else {
|
|
__nmk_gpio_make_input(nmk_chip, offset);
|
|
__nmk_gpio_set_pull(nmk_chip, offset, pull);
|
|
}
|
|
|
|
__nmk_gpio_set_lowemi(nmk_chip, offset, PIN_LOWEMI(cfg));
|
|
|
|
/*
|
|
* If the pin is switching to altfunc, and there was an interrupt
|
|
* installed on it which has been lazy disabled, actually mask the
|
|
* interrupt to prevent spurious interrupts that would occur while the
|
|
* pin is under control of the peripheral. Only SKE does this.
|
|
*/
|
|
if (af != NMK_GPIO_ALT_GPIO)
|
|
nmk_gpio_disable_lazy_irq(nmk_chip, offset);
|
|
|
|
/*
|
|
* If we've backed up the SLPM registers (glitch workaround), modify
|
|
* the backups since they will be restored.
|
|
*/
|
|
if (slpmregs) {
|
|
if (slpm == NMK_GPIO_SLPM_NOCHANGE)
|
|
slpmregs[nmk_chip->bank] |= BIT(offset);
|
|
else
|
|
slpmregs[nmk_chip->bank] &= ~BIT(offset);
|
|
} else
|
|
__nmk_gpio_set_slpm(nmk_chip, offset, slpm);
|
|
|
|
__nmk_gpio_set_mode_safe(nmk_chip, offset, af, glitch);
|
|
}
|
|
|
|
/*
|
|
* Safe sequence used to switch IOs between GPIO and Alternate-C mode:
|
|
* - Save SLPM registers
|
|
* - Set SLPM=0 for the IOs you want to switch and others to 1
|
|
* - Configure the GPIO registers for the IOs that are being switched
|
|
* - Set IOFORCE=1
|
|
* - Modify the AFLSA/B registers for the IOs that are being switched
|
|
* - Set IOFORCE=0
|
|
* - Restore SLPM registers
|
|
* - Any spurious wake up event during switch sequence to be ignored and
|
|
* cleared
|
|
*/
|
|
static void nmk_gpio_glitch_slpm_init(unsigned int *slpm)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_BANKS; i++) {
|
|
struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
|
|
unsigned int temp = slpm[i];
|
|
|
|
if (!chip)
|
|
break;
|
|
|
|
clk_enable(chip->clk);
|
|
|
|
slpm[i] = readl(chip->addr + NMK_GPIO_SLPC);
|
|
writel(temp, chip->addr + NMK_GPIO_SLPC);
|
|
}
|
|
}
|
|
|
|
static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_BANKS; i++) {
|
|
struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
|
|
|
|
if (!chip)
|
|
break;
|
|
|
|
writel(slpm[i], chip->addr + NMK_GPIO_SLPC);
|
|
|
|
clk_disable(chip->clk);
|
|
}
|
|
}
|
|
|
|
static int __nmk_config_pins(pin_cfg_t *cfgs, int num, bool sleep)
|
|
{
|
|
static unsigned int slpm[NUM_BANKS];
|
|
unsigned long flags;
|
|
bool glitch = false;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C) {
|
|
glitch = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
|
|
|
|
if (glitch) {
|
|
memset(slpm, 0xff, sizeof(slpm));
|
|
|
|
for (i = 0; i < num; i++) {
|
|
int pin = PIN_NUM(cfgs[i]);
|
|
int offset = pin % NMK_GPIO_PER_CHIP;
|
|
|
|
if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C)
|
|
slpm[pin / NMK_GPIO_PER_CHIP] &= ~BIT(offset);
|
|
}
|
|
|
|
nmk_gpio_glitch_slpm_init(slpm);
|
|
}
|
|
|
|
for (i = 0; i < num; i++) {
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
int pin = PIN_NUM(cfgs[i]);
|
|
|
|
nmk_chip = nmk_gpio_chips[pin / NMK_GPIO_PER_CHIP];
|
|
if (!nmk_chip) {
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
spin_lock(&nmk_chip->lock);
|
|
__nmk_config_pin(nmk_chip, pin % NMK_GPIO_PER_CHIP,
|
|
cfgs[i], sleep, glitch ? slpm : NULL);
|
|
spin_unlock(&nmk_chip->lock);
|
|
clk_disable(nmk_chip->clk);
|
|
}
|
|
|
|
if (glitch)
|
|
nmk_gpio_glitch_slpm_restore(slpm);
|
|
|
|
spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nmk_config_pin - configure a pin's mux attributes
|
|
* @cfg: pin confguration
|
|
* @sleep: Non-zero to apply the sleep mode configuration
|
|
* Configures a pin's mode (alternate function or GPIO), its pull up status,
|
|
* and its sleep mode based on the specified configuration. The @cfg is
|
|
* usually one of the SoC specific macros defined in mach/<soc>-pins.h. These
|
|
* are constructed using, and can be further enhanced with, the macros in
|
|
* plat/pincfg.h.
|
|
*
|
|
* If a pin's mode is set to GPIO, it is configured as an input to avoid
|
|
* side-effects. The gpio can be manipulated later using standard GPIO API
|
|
* calls.
|
|
*/
|
|
int nmk_config_pin(pin_cfg_t cfg, bool sleep)
|
|
{
|
|
return __nmk_config_pins(&cfg, 1, sleep);
|
|
}
|
|
EXPORT_SYMBOL(nmk_config_pin);
|
|
|
|
/**
|
|
* nmk_config_pins - configure several pins at once
|
|
* @cfgs: array of pin configurations
|
|
* @num: number of elments in the array
|
|
*
|
|
* Configures several pins using nmk_config_pin(). Refer to that function for
|
|
* further information.
|
|
*/
|
|
int nmk_config_pins(pin_cfg_t *cfgs, int num)
|
|
{
|
|
return __nmk_config_pins(cfgs, num, false);
|
|
}
|
|
EXPORT_SYMBOL(nmk_config_pins);
|
|
|
|
int nmk_config_pins_sleep(pin_cfg_t *cfgs, int num)
|
|
{
|
|
return __nmk_config_pins(cfgs, num, true);
|
|
}
|
|
EXPORT_SYMBOL(nmk_config_pins_sleep);
|
|
|
|
/**
|
|
* nmk_gpio_set_slpm() - configure the sleep mode of a pin
|
|
* @gpio: pin number
|
|
* @mode: NMK_GPIO_SLPM_INPUT or NMK_GPIO_SLPM_NOCHANGE,
|
|
*
|
|
* This register is actually in the pinmux layer, not the GPIO block itself.
|
|
* The GPIO1B_SLPM register defines the GPIO mode when SLEEP/DEEP-SLEEP
|
|
* mode is entered (i.e. when signal IOFORCE is HIGH by the platform code).
|
|
* Each GPIO can be configured to be forced into GPIO mode when IOFORCE is
|
|
* HIGH, overriding the normal setting defined by GPIO_AFSELx registers.
|
|
* When IOFORCE returns LOW (by software, after SLEEP/DEEP-SLEEP exit),
|
|
* the GPIOs return to the normal setting defined by GPIO_AFSELx registers.
|
|
*
|
|
* If @mode is NMK_GPIO_SLPM_INPUT, the corresponding GPIO is switched to GPIO
|
|
* mode when signal IOFORCE is HIGH (i.e. when SLEEP/DEEP-SLEEP mode is
|
|
* entered) regardless of the altfunction selected. Also wake-up detection is
|
|
* ENABLED.
|
|
*
|
|
* If @mode is NMK_GPIO_SLPM_NOCHANGE, the corresponding GPIO remains
|
|
* controlled by NMK_GPIO_DATC, NMK_GPIO_DATS, NMK_GPIO_DIR, NMK_GPIO_PDIS
|
|
* (for altfunction GPIO) or respective on-chip peripherals (for other
|
|
* altfuncs) when IOFORCE is HIGH. Also wake-up detection DISABLED.
|
|
*
|
|
* Note that enable_irq_wake() will automatically enable wakeup detection.
|
|
*/
|
|
int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
unsigned long flags;
|
|
|
|
nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP];
|
|
if (!nmk_chip)
|
|
return -EINVAL;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
|
|
spin_lock(&nmk_chip->lock);
|
|
|
|
__nmk_gpio_set_slpm(nmk_chip, gpio % NMK_GPIO_PER_CHIP, mode);
|
|
|
|
spin_unlock(&nmk_chip->lock);
|
|
spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nmk_gpio_set_pull() - enable/disable pull up/down on a gpio
|
|
* @gpio: pin number
|
|
* @pull: one of NMK_GPIO_PULL_DOWN, NMK_GPIO_PULL_UP, and NMK_GPIO_PULL_NONE
|
|
*
|
|
* Enables/disables pull up/down on a specified pin. This only takes effect if
|
|
* the pin is configured as an input (either explicitly or by the alternate
|
|
* function).
|
|
*
|
|
* NOTE: If enabling the pull up/down, the caller must ensure that the GPIO is
|
|
* configured as an input. Otherwise, due to the way the controller registers
|
|
* work, this function will change the value output on the pin.
|
|
*/
|
|
int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
unsigned long flags;
|
|
|
|
nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP];
|
|
if (!nmk_chip)
|
|
return -EINVAL;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
|
__nmk_gpio_set_pull(nmk_chip, gpio % NMK_GPIO_PER_CHIP, pull);
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Mode functions */
|
|
/**
|
|
* nmk_gpio_set_mode() - set the mux mode of a gpio pin
|
|
* @gpio: pin number
|
|
* @gpio_mode: one of NMK_GPIO_ALT_GPIO, NMK_GPIO_ALT_A,
|
|
* NMK_GPIO_ALT_B, and NMK_GPIO_ALT_C
|
|
*
|
|
* Sets the mode of the specified pin to one of the alternate functions or
|
|
* plain GPIO.
|
|
*/
|
|
int nmk_gpio_set_mode(int gpio, int gpio_mode)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
unsigned long flags;
|
|
|
|
nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP];
|
|
if (!nmk_chip)
|
|
return -EINVAL;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
|
__nmk_gpio_set_mode(nmk_chip, gpio % NMK_GPIO_PER_CHIP, gpio_mode);
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(nmk_gpio_set_mode);
|
|
|
|
int nmk_gpio_get_mode(int gpio)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
u32 afunc, bfunc, bit;
|
|
|
|
nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP];
|
|
if (!nmk_chip)
|
|
return -EINVAL;
|
|
|
|
bit = 1 << (gpio % NMK_GPIO_PER_CHIP);
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
|
|
afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit;
|
|
bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit;
|
|
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0);
|
|
}
|
|
EXPORT_SYMBOL(nmk_gpio_get_mode);
|
|
|
|
|
|
/* IRQ functions */
|
|
static inline int nmk_gpio_get_bitmask(int gpio)
|
|
{
|
|
return 1 << (gpio % NMK_GPIO_PER_CHIP);
|
|
}
|
|
|
|
static void nmk_gpio_irq_ack(struct irq_data *d)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
|
|
nmk_chip = irq_data_get_irq_chip_data(d);
|
|
if (!nmk_chip)
|
|
return;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
writel(nmk_gpio_get_bitmask(d->hwirq), nmk_chip->addr + NMK_GPIO_IC);
|
|
clk_disable(nmk_chip->clk);
|
|
}
|
|
|
|
enum nmk_gpio_irq_type {
|
|
NORMAL,
|
|
WAKE,
|
|
};
|
|
|
|
static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
|
|
int gpio, enum nmk_gpio_irq_type which,
|
|
bool enable)
|
|
{
|
|
u32 bitmask = nmk_gpio_get_bitmask(gpio);
|
|
u32 *rimscval;
|
|
u32 *fimscval;
|
|
u32 rimscreg;
|
|
u32 fimscreg;
|
|
|
|
if (which == NORMAL) {
|
|
rimscreg = NMK_GPIO_RIMSC;
|
|
fimscreg = NMK_GPIO_FIMSC;
|
|
rimscval = &nmk_chip->rimsc;
|
|
fimscval = &nmk_chip->fimsc;
|
|
} else {
|
|
rimscreg = NMK_GPIO_RWIMSC;
|
|
fimscreg = NMK_GPIO_FWIMSC;
|
|
rimscval = &nmk_chip->rwimsc;
|
|
fimscval = &nmk_chip->fwimsc;
|
|
}
|
|
|
|
/* we must individually set/clear the two edges */
|
|
if (nmk_chip->edge_rising & bitmask) {
|
|
if (enable)
|
|
*rimscval |= bitmask;
|
|
else
|
|
*rimscval &= ~bitmask;
|
|
writel(*rimscval, nmk_chip->addr + rimscreg);
|
|
}
|
|
if (nmk_chip->edge_falling & bitmask) {
|
|
if (enable)
|
|
*fimscval |= bitmask;
|
|
else
|
|
*fimscval &= ~bitmask;
|
|
writel(*fimscval, nmk_chip->addr + fimscreg);
|
|
}
|
|
}
|
|
|
|
static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip,
|
|
int gpio, bool on)
|
|
{
|
|
/*
|
|
* Ensure WAKEUP_ENABLE is on. No need to disable it if wakeup is
|
|
* disabled, since setting SLPM to 1 increases power consumption, and
|
|
* wakeup is anyhow controlled by the RIMSC and FIMSC registers.
|
|
*/
|
|
if (nmk_chip->sleepmode && on) {
|
|
__nmk_gpio_set_slpm(nmk_chip, gpio % NMK_GPIO_PER_CHIP,
|
|
NMK_GPIO_SLPM_WAKEUP_ENABLE);
|
|
}
|
|
|
|
__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on);
|
|
}
|
|
|
|
static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
unsigned long flags;
|
|
u32 bitmask;
|
|
|
|
nmk_chip = irq_data_get_irq_chip_data(d);
|
|
bitmask = nmk_gpio_get_bitmask(d->hwirq);
|
|
if (!nmk_chip)
|
|
return -EINVAL;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
|
|
spin_lock(&nmk_chip->lock);
|
|
|
|
__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, enable);
|
|
|
|
if (!(nmk_chip->real_wake & bitmask))
|
|
__nmk_gpio_set_wake(nmk_chip, d->hwirq, enable);
|
|
|
|
spin_unlock(&nmk_chip->lock);
|
|
spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nmk_gpio_irq_mask(struct irq_data *d)
|
|
{
|
|
nmk_gpio_irq_maskunmask(d, false);
|
|
}
|
|
|
|
static void nmk_gpio_irq_unmask(struct irq_data *d)
|
|
{
|
|
nmk_gpio_irq_maskunmask(d, true);
|
|
}
|
|
|
|
static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
unsigned long flags;
|
|
u32 bitmask;
|
|
|
|
nmk_chip = irq_data_get_irq_chip_data(d);
|
|
if (!nmk_chip)
|
|
return -EINVAL;
|
|
bitmask = nmk_gpio_get_bitmask(d->hwirq);
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
|
|
spin_lock(&nmk_chip->lock);
|
|
|
|
if (irqd_irq_disabled(d))
|
|
__nmk_gpio_set_wake(nmk_chip, d->hwirq, on);
|
|
|
|
if (on)
|
|
nmk_chip->real_wake |= bitmask;
|
|
else
|
|
nmk_chip->real_wake &= ~bitmask;
|
|
|
|
spin_unlock(&nmk_chip->lock);
|
|
spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type)
|
|
{
|
|
bool enabled = !irqd_irq_disabled(d);
|
|
bool wake = irqd_is_wakeup_set(d);
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
unsigned long flags;
|
|
u32 bitmask;
|
|
|
|
nmk_chip = irq_data_get_irq_chip_data(d);
|
|
bitmask = nmk_gpio_get_bitmask(d->hwirq);
|
|
if (!nmk_chip)
|
|
return -EINVAL;
|
|
if (type & IRQ_TYPE_LEVEL_HIGH)
|
|
return -EINVAL;
|
|
if (type & IRQ_TYPE_LEVEL_LOW)
|
|
return -EINVAL;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
spin_lock_irqsave(&nmk_chip->lock, flags);
|
|
|
|
if (enabled)
|
|
__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, false);
|
|
|
|
if (enabled || wake)
|
|
__nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, false);
|
|
|
|
nmk_chip->edge_rising &= ~bitmask;
|
|
if (type & IRQ_TYPE_EDGE_RISING)
|
|
nmk_chip->edge_rising |= bitmask;
|
|
|
|
nmk_chip->edge_falling &= ~bitmask;
|
|
if (type & IRQ_TYPE_EDGE_FALLING)
|
|
nmk_chip->edge_falling |= bitmask;
|
|
|
|
if (enabled)
|
|
__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, true);
|
|
|
|
if (enabled || wake)
|
|
__nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, true);
|
|
|
|
spin_unlock_irqrestore(&nmk_chip->lock, flags);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int nmk_gpio_irq_startup(struct irq_data *d)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d);
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
nmk_gpio_irq_unmask(d);
|
|
return 0;
|
|
}
|
|
|
|
static void nmk_gpio_irq_shutdown(struct irq_data *d)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d);
|
|
|
|
nmk_gpio_irq_mask(d);
|
|
clk_disable(nmk_chip->clk);
|
|
}
|
|
|
|
static struct irq_chip nmk_gpio_irq_chip = {
|
|
.name = "Nomadik-GPIO",
|
|
.irq_ack = nmk_gpio_irq_ack,
|
|
.irq_mask = nmk_gpio_irq_mask,
|
|
.irq_unmask = nmk_gpio_irq_unmask,
|
|
.irq_set_type = nmk_gpio_irq_set_type,
|
|
.irq_set_wake = nmk_gpio_irq_set_wake,
|
|
.irq_startup = nmk_gpio_irq_startup,
|
|
.irq_shutdown = nmk_gpio_irq_shutdown,
|
|
};
|
|
|
|
static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc,
|
|
u32 status)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
struct irq_chip *host_chip = irq_get_chip(irq);
|
|
unsigned int first_irq;
|
|
|
|
chained_irq_enter(host_chip, desc);
|
|
|
|
nmk_chip = irq_get_handler_data(irq);
|
|
first_irq = nmk_chip->domain->revmap_data.legacy.first_irq;
|
|
while (status) {
|
|
int bit = __ffs(status);
|
|
|
|
generic_handle_irq(first_irq + bit);
|
|
status &= ~BIT(bit);
|
|
}
|
|
|
|
chained_irq_exit(host_chip, desc);
|
|
}
|
|
|
|
static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq);
|
|
u32 status;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
status = readl(nmk_chip->addr + NMK_GPIO_IS);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
__nmk_gpio_irq_handler(irq, desc, status);
|
|
}
|
|
|
|
static void nmk_gpio_secondary_irq_handler(unsigned int irq,
|
|
struct irq_desc *desc)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq);
|
|
u32 status = nmk_chip->get_secondary_status(nmk_chip->bank);
|
|
|
|
__nmk_gpio_irq_handler(irq, desc, status);
|
|
}
|
|
|
|
static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip)
|
|
{
|
|
irq_set_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler);
|
|
irq_set_handler_data(nmk_chip->parent_irq, nmk_chip);
|
|
|
|
if (nmk_chip->secondary_parent_irq >= 0) {
|
|
irq_set_chained_handler(nmk_chip->secondary_parent_irq,
|
|
nmk_gpio_secondary_irq_handler);
|
|
irq_set_handler_data(nmk_chip->secondary_parent_irq, nmk_chip);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* I/O Functions */
|
|
|
|
static int nmk_gpio_request(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
/*
|
|
* Map back to global GPIO space and request muxing, the direction
|
|
* parameter does not matter for this controller.
|
|
*/
|
|
int gpio = chip->base + offset;
|
|
|
|
return pinctrl_request_gpio(gpio);
|
|
}
|
|
|
|
static void nmk_gpio_free(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
int gpio = chip->base + offset;
|
|
|
|
pinctrl_free_gpio(gpio);
|
|
}
|
|
|
|
static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
|
|
writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC);
|
|
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
u32 bit = 1 << offset;
|
|
int value;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
|
|
value = (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0;
|
|
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return value;
|
|
}
|
|
|
|
static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset,
|
|
int val)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
|
|
__nmk_gpio_set_output(nmk_chip, offset, val);
|
|
|
|
clk_disable(nmk_chip->clk);
|
|
}
|
|
|
|
static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
|
|
int val)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
|
|
__nmk_gpio_make_output(nmk_chip, offset, val);
|
|
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
return irq_find_mapping(nmk_chip->domain, offset);
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
#include <linux/seq_file.h>
|
|
|
|
static void nmk_gpio_dbg_show_one(struct seq_file *s, struct gpio_chip *chip,
|
|
unsigned offset, unsigned gpio)
|
|
{
|
|
const char *label = gpiochip_is_requested(chip, offset);
|
|
struct nmk_gpio_chip *nmk_chip =
|
|
container_of(chip, struct nmk_gpio_chip, chip);
|
|
int mode;
|
|
bool is_out;
|
|
bool pull;
|
|
u32 bit = 1 << offset;
|
|
const char *modes[] = {
|
|
[NMK_GPIO_ALT_GPIO] = "gpio",
|
|
[NMK_GPIO_ALT_A] = "altA",
|
|
[NMK_GPIO_ALT_B] = "altB",
|
|
[NMK_GPIO_ALT_C] = "altC",
|
|
};
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
is_out = !!(readl(nmk_chip->addr + NMK_GPIO_DIR) & bit);
|
|
pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit);
|
|
mode = nmk_gpio_get_mode(gpio);
|
|
|
|
seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s",
|
|
gpio, label ?: "(none)",
|
|
is_out ? "out" : "in ",
|
|
chip->get
|
|
? (chip->get(chip, offset) ? "hi" : "lo")
|
|
: "? ",
|
|
(mode < 0) ? "unknown" : modes[mode],
|
|
pull ? "pull" : "none");
|
|
|
|
if (label && !is_out) {
|
|
int irq = gpio_to_irq(gpio);
|
|
struct irq_desc *desc = irq_to_desc(irq);
|
|
|
|
/* This races with request_irq(), set_irq_type(),
|
|
* and set_irq_wake() ... but those are "rare".
|
|
*/
|
|
if (irq >= 0 && desc->action) {
|
|
char *trigger;
|
|
u32 bitmask = nmk_gpio_get_bitmask(gpio);
|
|
|
|
if (nmk_chip->edge_rising & bitmask)
|
|
trigger = "edge-rising";
|
|
else if (nmk_chip->edge_falling & bitmask)
|
|
trigger = "edge-falling";
|
|
else
|
|
trigger = "edge-undefined";
|
|
|
|
seq_printf(s, " irq-%d %s%s",
|
|
irq, trigger,
|
|
irqd_is_wakeup_set(&desc->irq_data)
|
|
? " wakeup" : "");
|
|
}
|
|
}
|
|
clk_disable(nmk_chip->clk);
|
|
}
|
|
|
|
static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
|
|
{
|
|
unsigned i;
|
|
unsigned gpio = chip->base;
|
|
|
|
for (i = 0; i < chip->ngpio; i++, gpio++) {
|
|
nmk_gpio_dbg_show_one(s, chip, i, gpio);
|
|
seq_printf(s, "\n");
|
|
}
|
|
}
|
|
|
|
#else
|
|
static inline void nmk_gpio_dbg_show_one(struct seq_file *s,
|
|
struct gpio_chip *chip,
|
|
unsigned offset, unsigned gpio)
|
|
{
|
|
}
|
|
#define nmk_gpio_dbg_show NULL
|
|
#endif
|
|
|
|
/* This structure is replicated for each GPIO block allocated at probe time */
|
|
static struct gpio_chip nmk_gpio_template = {
|
|
.request = nmk_gpio_request,
|
|
.free = nmk_gpio_free,
|
|
.direction_input = nmk_gpio_make_input,
|
|
.get = nmk_gpio_get_input,
|
|
.direction_output = nmk_gpio_make_output,
|
|
.set = nmk_gpio_set_output,
|
|
.to_irq = nmk_gpio_to_irq,
|
|
.dbg_show = nmk_gpio_dbg_show,
|
|
.can_sleep = 0,
|
|
};
|
|
|
|
void nmk_gpio_clocks_enable(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_BANKS; i++) {
|
|
struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
|
|
|
|
if (!chip)
|
|
continue;
|
|
|
|
clk_enable(chip->clk);
|
|
}
|
|
}
|
|
|
|
void nmk_gpio_clocks_disable(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_BANKS; i++) {
|
|
struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
|
|
|
|
if (!chip)
|
|
continue;
|
|
|
|
clk_disable(chip->clk);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the suspend/resume path to only keep the real wakeup interrupts
|
|
* (those that have had set_irq_wake() called on them) as wakeup interrupts,
|
|
* and not the rest of the interrupts which we needed to have as wakeups for
|
|
* cpuidle.
|
|
*
|
|
* PM ops are not used since this needs to be done at the end, after all the
|
|
* other drivers are done with their suspend callbacks.
|
|
*/
|
|
void nmk_gpio_wakeups_suspend(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_BANKS; i++) {
|
|
struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
|
|
|
|
if (!chip)
|
|
break;
|
|
|
|
clk_enable(chip->clk);
|
|
|
|
writel(chip->rwimsc & chip->real_wake,
|
|
chip->addr + NMK_GPIO_RWIMSC);
|
|
writel(chip->fwimsc & chip->real_wake,
|
|
chip->addr + NMK_GPIO_FWIMSC);
|
|
|
|
clk_disable(chip->clk);
|
|
}
|
|
}
|
|
|
|
void nmk_gpio_wakeups_resume(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_BANKS; i++) {
|
|
struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
|
|
|
|
if (!chip)
|
|
break;
|
|
|
|
clk_enable(chip->clk);
|
|
|
|
writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC);
|
|
writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC);
|
|
|
|
clk_disable(chip->clk);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read the pull up/pull down status.
|
|
* A bit set in 'pull_up' means that pull up
|
|
* is selected if pull is enabled in PDIS register.
|
|
* Note: only pull up/down set via this driver can
|
|
* be detected due to HW limitations.
|
|
*/
|
|
void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up)
|
|
{
|
|
if (gpio_bank < NUM_BANKS) {
|
|
struct nmk_gpio_chip *chip = nmk_gpio_chips[gpio_bank];
|
|
|
|
if (!chip)
|
|
return;
|
|
|
|
*pull_up = chip->pull_up;
|
|
}
|
|
}
|
|
|
|
int nmk_gpio_irq_map(struct irq_domain *d, unsigned int irq,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
struct nmk_gpio_chip *nmk_chip = d->host_data;
|
|
|
|
if (!nmk_chip)
|
|
return -EINVAL;
|
|
|
|
irq_set_chip_and_handler(irq, &nmk_gpio_irq_chip, handle_edge_irq);
|
|
set_irq_flags(irq, IRQF_VALID);
|
|
irq_set_chip_data(irq, nmk_chip);
|
|
irq_set_irq_type(irq, IRQ_TYPE_EDGE_FALLING);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct irq_domain_ops nmk_gpio_irq_simple_ops = {
|
|
.map = nmk_gpio_irq_map,
|
|
.xlate = irq_domain_xlate_twocell,
|
|
};
|
|
|
|
static int __devinit nmk_gpio_probe(struct platform_device *dev)
|
|
{
|
|
struct nmk_gpio_platform_data *pdata = dev->dev.platform_data;
|
|
struct device_node *np = dev->dev.of_node;
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
struct gpio_chip *chip;
|
|
struct resource *res;
|
|
struct clk *clk;
|
|
int secondary_irq;
|
|
void __iomem *base;
|
|
int irq;
|
|
int ret;
|
|
|
|
if (!pdata && !np) {
|
|
dev_err(&dev->dev, "No platform data or device tree found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (np) {
|
|
pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata)
|
|
return -ENOMEM;
|
|
|
|
if (of_get_property(np, "st,supports-sleepmode", NULL))
|
|
pdata->supports_sleepmode = true;
|
|
|
|
if (of_property_read_u32(np, "gpio-bank", &dev->id)) {
|
|
dev_err(&dev->dev, "gpio-bank property not found\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
pdata->first_gpio = dev->id * NMK_GPIO_PER_CHIP;
|
|
pdata->num_gpio = NMK_GPIO_PER_CHIP;
|
|
}
|
|
|
|
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
irq = platform_get_irq(dev, 0);
|
|
if (irq < 0) {
|
|
ret = irq;
|
|
goto out;
|
|
}
|
|
|
|
secondary_irq = platform_get_irq(dev, 1);
|
|
if (secondary_irq >= 0 && !pdata->get_secondary_status) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
base = devm_request_and_ioremap(&dev->dev, res);
|
|
if (!base) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
clk = devm_clk_get(&dev->dev, NULL);
|
|
if (IS_ERR(clk)) {
|
|
ret = PTR_ERR(clk);
|
|
goto out;
|
|
}
|
|
clk_prepare(clk);
|
|
|
|
nmk_chip = devm_kzalloc(&dev->dev, sizeof(*nmk_chip), GFP_KERNEL);
|
|
if (!nmk_chip) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* The virt address in nmk_chip->addr is in the nomadik register space,
|
|
* so we can simply convert the resource address, without remapping
|
|
*/
|
|
nmk_chip->bank = dev->id;
|
|
nmk_chip->clk = clk;
|
|
nmk_chip->addr = base;
|
|
nmk_chip->chip = nmk_gpio_template;
|
|
nmk_chip->parent_irq = irq;
|
|
nmk_chip->secondary_parent_irq = secondary_irq;
|
|
nmk_chip->get_secondary_status = pdata->get_secondary_status;
|
|
nmk_chip->set_ioforce = pdata->set_ioforce;
|
|
nmk_chip->sleepmode = pdata->supports_sleepmode;
|
|
spin_lock_init(&nmk_chip->lock);
|
|
|
|
chip = &nmk_chip->chip;
|
|
chip->base = pdata->first_gpio;
|
|
chip->ngpio = pdata->num_gpio;
|
|
chip->label = pdata->name ?: dev_name(&dev->dev);
|
|
chip->dev = &dev->dev;
|
|
chip->owner = THIS_MODULE;
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
#ifdef CONFIG_OF_GPIO
|
|
chip->of_node = np;
|
|
#endif
|
|
|
|
ret = gpiochip_add(&nmk_chip->chip);
|
|
if (ret)
|
|
goto out;
|
|
|
|
BUG_ON(nmk_chip->bank >= ARRAY_SIZE(nmk_gpio_chips));
|
|
|
|
nmk_gpio_chips[nmk_chip->bank] = nmk_chip;
|
|
|
|
platform_set_drvdata(dev, nmk_chip);
|
|
|
|
nmk_chip->domain = irq_domain_add_legacy(np, NMK_GPIO_PER_CHIP,
|
|
NOMADIK_GPIO_TO_IRQ(pdata->first_gpio),
|
|
0, &nmk_gpio_irq_simple_ops, nmk_chip);
|
|
if (!nmk_chip->domain) {
|
|
dev_err(&dev->dev, "failed to create irqdomain\n");
|
|
ret = -ENOSYS;
|
|
goto out;
|
|
}
|
|
|
|
nmk_gpio_init_irq(nmk_chip);
|
|
|
|
dev_info(&dev->dev, "at address %p\n", nmk_chip->addr);
|
|
|
|
return 0;
|
|
|
|
out:
|
|
dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret,
|
|
pdata->first_gpio, pdata->first_gpio+31);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int nmk_get_groups_cnt(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return npct->soc->ngroups;
|
|
}
|
|
|
|
static const char *nmk_get_group_name(struct pinctrl_dev *pctldev,
|
|
unsigned selector)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return npct->soc->groups[selector].name;
|
|
}
|
|
|
|
static int nmk_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
|
|
const unsigned **pins,
|
|
unsigned *num_pins)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
*pins = npct->soc->groups[selector].pins;
|
|
*num_pins = npct->soc->groups[selector].npins;
|
|
return 0;
|
|
}
|
|
|
|
static struct pinctrl_gpio_range *
|
|
nmk_match_gpio_range(struct pinctrl_dev *pctldev, unsigned offset)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
int i;
|
|
|
|
for (i = 0; i < npct->soc->gpio_num_ranges; i++) {
|
|
struct pinctrl_gpio_range *range;
|
|
|
|
range = &npct->soc->gpio_ranges[i];
|
|
if (offset >= range->pin_base &&
|
|
offset <= (range->pin_base + range->npins - 1))
|
|
return range;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void nmk_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
|
|
unsigned offset)
|
|
{
|
|
struct pinctrl_gpio_range *range;
|
|
struct gpio_chip *chip;
|
|
|
|
range = nmk_match_gpio_range(pctldev, offset);
|
|
if (!range || !range->gc) {
|
|
seq_printf(s, "invalid pin offset");
|
|
return;
|
|
}
|
|
chip = range->gc;
|
|
nmk_gpio_dbg_show_one(s, chip, offset - chip->base, offset);
|
|
}
|
|
|
|
static struct pinctrl_ops nmk_pinctrl_ops = {
|
|
.get_groups_count = nmk_get_groups_cnt,
|
|
.get_group_name = nmk_get_group_name,
|
|
.get_group_pins = nmk_get_group_pins,
|
|
.pin_dbg_show = nmk_pin_dbg_show,
|
|
};
|
|
|
|
static int nmk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return npct->soc->nfunctions;
|
|
}
|
|
|
|
static const char *nmk_pmx_get_func_name(struct pinctrl_dev *pctldev,
|
|
unsigned function)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return npct->soc->functions[function].name;
|
|
}
|
|
|
|
static int nmk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
|
|
unsigned function,
|
|
const char * const **groups,
|
|
unsigned * const num_groups)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
*groups = npct->soc->functions[function].groups;
|
|
*num_groups = npct->soc->functions[function].ngroups;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nmk_pmx_enable(struct pinctrl_dev *pctldev, unsigned function,
|
|
unsigned group)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
const struct nmk_pingroup *g;
|
|
static unsigned int slpm[NUM_BANKS];
|
|
unsigned long flags;
|
|
bool glitch;
|
|
int ret = -EINVAL;
|
|
int i;
|
|
|
|
g = &npct->soc->groups[group];
|
|
|
|
if (g->altsetting < 0)
|
|
return -EINVAL;
|
|
|
|
dev_dbg(npct->dev, "enable group %s, %u pins\n", g->name, g->npins);
|
|
|
|
/*
|
|
* If we're setting altfunc C by setting both AFSLA and AFSLB to 1,
|
|
* we may pass through an undesired state. In this case we take
|
|
* some extra care.
|
|
*
|
|
* Safe sequence used to switch IOs between GPIO and Alternate-C mode:
|
|
* - Save SLPM registers (since we have a shadow register in the
|
|
* nmk_chip we're using that as backup)
|
|
* - Set SLPM=0 for the IOs you want to switch and others to 1
|
|
* - Configure the GPIO registers for the IOs that are being switched
|
|
* - Set IOFORCE=1
|
|
* - Modify the AFLSA/B registers for the IOs that are being switched
|
|
* - Set IOFORCE=0
|
|
* - Restore SLPM registers
|
|
* - Any spurious wake up event during switch sequence to be ignored
|
|
* and cleared
|
|
*
|
|
* We REALLY need to save ALL slpm registers, because the external
|
|
* IOFORCE will switch *all* ports to their sleepmode setting to as
|
|
* to avoid glitches. (Not just one port!)
|
|
*/
|
|
glitch = (g->altsetting == NMK_GPIO_ALT_C);
|
|
|
|
if (glitch) {
|
|
spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
|
|
|
|
/* Initially don't put any pins to sleep when switching */
|
|
memset(slpm, 0xff, sizeof(slpm));
|
|
|
|
/*
|
|
* Then mask the pins that need to be sleeping now when we're
|
|
* switching to the ALT C function.
|
|
*/
|
|
for (i = 0; i < g->npins; i++)
|
|
slpm[g->pins[i] / NMK_GPIO_PER_CHIP] &= ~BIT(g->pins[i]);
|
|
nmk_gpio_glitch_slpm_init(slpm);
|
|
}
|
|
|
|
for (i = 0; i < g->npins; i++) {
|
|
struct pinctrl_gpio_range *range;
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
struct gpio_chip *chip;
|
|
unsigned bit;
|
|
|
|
range = nmk_match_gpio_range(pctldev, g->pins[i]);
|
|
if (!range) {
|
|
dev_err(npct->dev,
|
|
"invalid pin offset %d in group %s at index %d\n",
|
|
g->pins[i], g->name, i);
|
|
goto out_glitch;
|
|
}
|
|
if (!range->gc) {
|
|
dev_err(npct->dev, "GPIO chip missing in range for pin offset %d in group %s at index %d\n",
|
|
g->pins[i], g->name, i);
|
|
goto out_glitch;
|
|
}
|
|
chip = range->gc;
|
|
nmk_chip = container_of(chip, struct nmk_gpio_chip, chip);
|
|
dev_dbg(npct->dev, "setting pin %d to altsetting %d\n", g->pins[i], g->altsetting);
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
bit = g->pins[i] % NMK_GPIO_PER_CHIP;
|
|
/*
|
|
* If the pin is switching to altfunc, and there was an
|
|
* interrupt installed on it which has been lazy disabled,
|
|
* actually mask the interrupt to prevent spurious interrupts
|
|
* that would occur while the pin is under control of the
|
|
* peripheral. Only SKE does this.
|
|
*/
|
|
nmk_gpio_disable_lazy_irq(nmk_chip, bit);
|
|
|
|
__nmk_gpio_set_mode_safe(nmk_chip, bit, g->altsetting, glitch);
|
|
clk_disable(nmk_chip->clk);
|
|
}
|
|
|
|
/* When all pins are successfully reconfigured we get here */
|
|
ret = 0;
|
|
|
|
out_glitch:
|
|
if (glitch) {
|
|
nmk_gpio_glitch_slpm_restore(slpm);
|
|
spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void nmk_pmx_disable(struct pinctrl_dev *pctldev,
|
|
unsigned function, unsigned group)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
const struct nmk_pingroup *g;
|
|
|
|
g = &npct->soc->groups[group];
|
|
|
|
if (g->altsetting < 0)
|
|
return;
|
|
|
|
/* Poke out the mux, set the pin to some default state? */
|
|
dev_dbg(npct->dev, "disable group %s, %u pins\n", g->name, g->npins);
|
|
}
|
|
|
|
int nmk_gpio_request_enable(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range,
|
|
unsigned offset)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
struct gpio_chip *chip;
|
|
unsigned bit;
|
|
|
|
if (!range) {
|
|
dev_err(npct->dev, "invalid range\n");
|
|
return -EINVAL;
|
|
}
|
|
if (!range->gc) {
|
|
dev_err(npct->dev, "missing GPIO chip in range\n");
|
|
return -EINVAL;
|
|
}
|
|
chip = range->gc;
|
|
nmk_chip = container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset);
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
bit = offset % NMK_GPIO_PER_CHIP;
|
|
/* There is no glitch when converting any pin to GPIO */
|
|
__nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO);
|
|
clk_disable(nmk_chip->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void nmk_gpio_disable_free(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range,
|
|
unsigned offset)
|
|
{
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
dev_dbg(npct->dev, "disable pin %u as GPIO\n", offset);
|
|
/* Set the pin to some default state, GPIO is usually default */
|
|
}
|
|
|
|
static struct pinmux_ops nmk_pinmux_ops = {
|
|
.get_functions_count = nmk_pmx_get_funcs_cnt,
|
|
.get_function_name = nmk_pmx_get_func_name,
|
|
.get_function_groups = nmk_pmx_get_func_groups,
|
|
.enable = nmk_pmx_enable,
|
|
.disable = nmk_pmx_disable,
|
|
.gpio_request_enable = nmk_gpio_request_enable,
|
|
.gpio_disable_free = nmk_gpio_disable_free,
|
|
};
|
|
|
|
int nmk_pin_config_get(struct pinctrl_dev *pctldev,
|
|
unsigned pin,
|
|
unsigned long *config)
|
|
{
|
|
/* Not implemented */
|
|
return -EINVAL;
|
|
}
|
|
|
|
int nmk_pin_config_set(struct pinctrl_dev *pctldev,
|
|
unsigned pin,
|
|
unsigned long config)
|
|
{
|
|
static const char *pullnames[] = {
|
|
[NMK_GPIO_PULL_NONE] = "none",
|
|
[NMK_GPIO_PULL_UP] = "up",
|
|
[NMK_GPIO_PULL_DOWN] = "down",
|
|
[3] /* illegal */ = "??"
|
|
};
|
|
static const char *slpmnames[] = {
|
|
[NMK_GPIO_SLPM_INPUT] = "input/wakeup",
|
|
[NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup",
|
|
};
|
|
struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
|
|
struct nmk_gpio_chip *nmk_chip;
|
|
struct pinctrl_gpio_range *range;
|
|
struct gpio_chip *chip;
|
|
unsigned bit;
|
|
|
|
/*
|
|
* The pin config contains pin number and altfunction fields, here
|
|
* we just ignore that part. It's being handled by the framework and
|
|
* pinmux callback respectively.
|
|
*/
|
|
pin_cfg_t cfg = (pin_cfg_t) config;
|
|
int pull = PIN_PULL(cfg);
|
|
int slpm = PIN_SLPM(cfg);
|
|
int output = PIN_DIR(cfg);
|
|
int val = PIN_VAL(cfg);
|
|
bool lowemi = PIN_LOWEMI(cfg);
|
|
bool gpiomode = PIN_GPIOMODE(cfg);
|
|
bool sleep = PIN_SLEEPMODE(cfg);
|
|
|
|
range = nmk_match_gpio_range(pctldev, pin);
|
|
if (!range) {
|
|
dev_err(npct->dev, "invalid pin offset %d\n", pin);
|
|
return -EINVAL;
|
|
}
|
|
if (!range->gc) {
|
|
dev_err(npct->dev, "GPIO chip missing in range for pin %d\n",
|
|
pin);
|
|
return -EINVAL;
|
|
}
|
|
chip = range->gc;
|
|
nmk_chip = container_of(chip, struct nmk_gpio_chip, chip);
|
|
|
|
if (sleep) {
|
|
int slpm_pull = PIN_SLPM_PULL(cfg);
|
|
int slpm_output = PIN_SLPM_DIR(cfg);
|
|
int slpm_val = PIN_SLPM_VAL(cfg);
|
|
|
|
/* All pins go into GPIO mode at sleep */
|
|
gpiomode = true;
|
|
|
|
/*
|
|
* The SLPM_* values are normal values + 1 to allow zero to
|
|
* mean "same as normal".
|
|
*/
|
|
if (slpm_pull)
|
|
pull = slpm_pull - 1;
|
|
if (slpm_output)
|
|
output = slpm_output - 1;
|
|
if (slpm_val)
|
|
val = slpm_val - 1;
|
|
|
|
dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n",
|
|
pin,
|
|
slpm_pull ? pullnames[pull] : "same",
|
|
slpm_output ? (output ? "output" : "input") : "same",
|
|
slpm_val ? (val ? "high" : "low") : "same");
|
|
}
|
|
|
|
dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: pull %s, slpm %s (%s%s), lowemi %s\n",
|
|
pin, cfg, pullnames[pull], slpmnames[slpm],
|
|
output ? "output " : "input",
|
|
output ? (val ? "high" : "low") : "",
|
|
lowemi ? "on" : "off" );
|
|
|
|
clk_enable(nmk_chip->clk);
|
|
bit = pin % NMK_GPIO_PER_CHIP;
|
|
if (gpiomode)
|
|
/* No glitch when going to GPIO mode */
|
|
__nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO);
|
|
if (output)
|
|
__nmk_gpio_make_output(nmk_chip, bit, val);
|
|
else {
|
|
__nmk_gpio_make_input(nmk_chip, bit);
|
|
__nmk_gpio_set_pull(nmk_chip, bit, pull);
|
|
}
|
|
/* TODO: isn't this only applicable on output pins? */
|
|
__nmk_gpio_set_lowemi(nmk_chip, bit, lowemi);
|
|
|
|
__nmk_gpio_set_slpm(nmk_chip, bit, slpm);
|
|
clk_disable(nmk_chip->clk);
|
|
return 0;
|
|
}
|
|
|
|
static struct pinconf_ops nmk_pinconf_ops = {
|
|
.pin_config_get = nmk_pin_config_get,
|
|
.pin_config_set = nmk_pin_config_set,
|
|
};
|
|
|
|
static struct pinctrl_desc nmk_pinctrl_desc = {
|
|
.name = "pinctrl-nomadik",
|
|
.pctlops = &nmk_pinctrl_ops,
|
|
.pmxops = &nmk_pinmux_ops,
|
|
.confops = &nmk_pinconf_ops,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static const struct of_device_id nmk_pinctrl_match[] = {
|
|
{
|
|
.compatible = "stericsson,nmk_pinctrl",
|
|
.data = (void *)PINCTRL_NMK_DB8500,
|
|
},
|
|
{},
|
|
};
|
|
|
|
static int __devinit nmk_pinctrl_probe(struct platform_device *pdev)
|
|
{
|
|
const struct platform_device_id *platid = platform_get_device_id(pdev);
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct nmk_pinctrl *npct;
|
|
unsigned int version = 0;
|
|
int i;
|
|
|
|
npct = devm_kzalloc(&pdev->dev, sizeof(*npct), GFP_KERNEL);
|
|
if (!npct)
|
|
return -ENOMEM;
|
|
|
|
if (platid)
|
|
version = platid->driver_data;
|
|
else if (np)
|
|
version = (unsigned int)
|
|
of_match_device(nmk_pinctrl_match, &pdev->dev)->data;
|
|
|
|
/* Poke in other ASIC variants here */
|
|
if (version == PINCTRL_NMK_DB8500)
|
|
nmk_pinctrl_db8500_init(&npct->soc);
|
|
|
|
/*
|
|
* We need all the GPIO drivers to probe FIRST, or we will not be able
|
|
* to obtain references to the struct gpio_chip * for them, and we
|
|
* need this to proceed.
|
|
*/
|
|
for (i = 0; i < npct->soc->gpio_num_ranges; i++) {
|
|
if (!nmk_gpio_chips[i]) {
|
|
dev_warn(&pdev->dev, "GPIO chip %d not registered yet\n", i);
|
|
return -EPROBE_DEFER;
|
|
}
|
|
npct->soc->gpio_ranges[i].gc = &nmk_gpio_chips[i]->chip;
|
|
}
|
|
|
|
nmk_pinctrl_desc.pins = npct->soc->pins;
|
|
nmk_pinctrl_desc.npins = npct->soc->npins;
|
|
npct->dev = &pdev->dev;
|
|
npct->pctl = pinctrl_register(&nmk_pinctrl_desc, &pdev->dev, npct);
|
|
if (!npct->pctl) {
|
|
dev_err(&pdev->dev, "could not register Nomadik pinctrl driver\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* We will handle a range of GPIO pins */
|
|
for (i = 0; i < npct->soc->gpio_num_ranges; i++)
|
|
pinctrl_add_gpio_range(npct->pctl, &npct->soc->gpio_ranges[i]);
|
|
|
|
platform_set_drvdata(pdev, npct);
|
|
dev_info(&pdev->dev, "initialized Nomadik pin control driver\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id nmk_gpio_match[] = {
|
|
{ .compatible = "st,nomadik-gpio", },
|
|
{}
|
|
};
|
|
|
|
static struct platform_driver nmk_gpio_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "gpio",
|
|
.of_match_table = nmk_gpio_match,
|
|
},
|
|
.probe = nmk_gpio_probe,
|
|
};
|
|
|
|
static const struct platform_device_id nmk_pinctrl_id[] = {
|
|
{ "pinctrl-stn8815", PINCTRL_NMK_STN8815 },
|
|
{ "pinctrl-db8500", PINCTRL_NMK_DB8500 },
|
|
};
|
|
|
|
static struct platform_driver nmk_pinctrl_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "pinctrl-nomadik",
|
|
.of_match_table = nmk_pinctrl_match,
|
|
},
|
|
.probe = nmk_pinctrl_probe,
|
|
.id_table = nmk_pinctrl_id,
|
|
};
|
|
|
|
static int __init nmk_gpio_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = platform_driver_register(&nmk_gpio_driver);
|
|
if (ret)
|
|
return ret;
|
|
return platform_driver_register(&nmk_pinctrl_driver);
|
|
}
|
|
|
|
core_initcall(nmk_gpio_init);
|
|
|
|
MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini");
|
|
MODULE_DESCRIPTION("Nomadik GPIO Driver");
|
|
MODULE_LICENSE("GPL");
|