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linux-zen-desktop/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c

1175 lines
36 KiB
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Initial commit
2023-08-30 17:31:07 +02:00
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2016-2018 Nuvoton Technology corporation.
// Copyright (c) 2016, Dell Inc
// Copyright (c) 2021-2022 Jonathan Neuschäfer
//
// This driver uses the following registers:
// - Pin mux registers, in the GCR (general control registers) block
// - GPIO registers, specific to each GPIO bank
// - GPIO event (interrupt) registers, located centrally in the GPIO register
// block, shared between all GPIO banks
#include <linux/device.h>
#include <linux/fwnode.h>
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include "../core.h"
/* GCR registers */
#define WPCM450_GCR_MFSEL1 0x0c
#define WPCM450_GCR_MFSEL2 0x10
#define WPCM450_GCR_NONE 0
/* GPIO event (interrupt) registers */
#define WPCM450_GPEVTYPE 0x00
#define WPCM450_GPEVPOL 0x04
#define WPCM450_GPEVDBNC 0x08
#define WPCM450_GPEVEN 0x0c
#define WPCM450_GPEVST 0x10
#define WPCM450_NUM_BANKS 8
#define WPCM450_NUM_GPIOS 128
#define WPCM450_NUM_GPIO_IRQS 4
struct wpcm450_pinctrl;
struct wpcm450_bank;
struct wpcm450_gpio {
struct gpio_chip gc;
struct wpcm450_pinctrl *pctrl;
const struct wpcm450_bank *bank;
};
struct wpcm450_pinctrl {
struct pinctrl_dev *pctldev;
struct device *dev;
struct irq_domain *domain;
struct regmap *gcr_regmap;
void __iomem *gpio_base;
struct wpcm450_gpio gpio_bank[WPCM450_NUM_BANKS];
unsigned long both_edges;
/*
* This spin lock protects registers and struct wpcm450_pinctrl fields
* against concurrent access.
*/
raw_spinlock_t lock;
};
struct wpcm450_bank {
/* Range of GPIOs in this port */
u8 base;
u8 length;
/* Register offsets (0 = register doesn't exist in this port) */
u8 cfg0, cfg1, cfg2;
u8 blink;
u8 dataout, datain;
/* Interrupt bit mapping */
u8 first_irq_bit; /* First bit in GPEVST that belongs to this bank */
u8 num_irqs; /* Number of IRQ-capable GPIOs in this bank */
u8 first_irq_gpio; /* First IRQ-capable GPIO in this bank */
};
static const struct wpcm450_bank wpcm450_banks[WPCM450_NUM_BANKS] = {
/* range cfg0 cfg1 cfg2 blink out in IRQ map */
{ 0, 16, 0x14, 0x18, 0, 0, 0x1c, 0x20, 0, 16, 0 },
{ 16, 16, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 16, 2, 8 },
{ 32, 16, 0x3c, 0x40, 0x44, 0, 0x48, 0x4c, 0, 0, 0 },
{ 48, 16, 0x50, 0x54, 0x58, 0, 0x5c, 0x60, 0, 0, 0 },
{ 64, 16, 0x64, 0x68, 0x6c, 0, 0x70, 0x74, 0, 0, 0 },
{ 80, 16, 0x78, 0x7c, 0x80, 0, 0x84, 0x88, 0, 0, 0 },
{ 96, 18, 0, 0, 0, 0, 0, 0x8c, 0, 0, 0 },
{ 114, 14, 0x90, 0x94, 0x98, 0, 0x9c, 0xa0, 0, 0, 0 },
};
static int wpcm450_gpio_irq_bitnum(struct wpcm450_gpio *gpio, struct irq_data *d)
{
const struct wpcm450_bank *bank = gpio->bank;
int hwirq = irqd_to_hwirq(d);
if (hwirq < bank->first_irq_gpio)
return -EINVAL;
if (hwirq - bank->first_irq_gpio >= bank->num_irqs)
return -EINVAL;
return hwirq - bank->first_irq_gpio + bank->first_irq_bit;
}
static int wpcm450_irq_bitnum_to_gpio(struct wpcm450_gpio *gpio, int bitnum)
{
const struct wpcm450_bank *bank = gpio->bank;
if (bitnum < bank->first_irq_bit)
return -EINVAL;
if (bitnum - bank->first_irq_bit > bank->num_irqs)
return -EINVAL;
return bitnum - bank->first_irq_bit + bank->first_irq_gpio;
}
static void wpcm450_gpio_irq_ack(struct irq_data *d)
{
struct wpcm450_gpio *gpio = gpiochip_get_data(irq_data_get_irq_chip_data(d));
struct wpcm450_pinctrl *pctrl = gpio->pctrl;
unsigned long flags;
int bit;
bit = wpcm450_gpio_irq_bitnum(gpio, d);
if (bit < 0)
return;
raw_spin_lock_irqsave(&pctrl->lock, flags);
iowrite32(BIT(bit), pctrl->gpio_base + WPCM450_GPEVST);
raw_spin_unlock_irqrestore(&pctrl->lock, flags);
}
static void wpcm450_gpio_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct wpcm450_gpio *gpio = gpiochip_get_data(gc);
struct wpcm450_pinctrl *pctrl = gpio->pctrl;
unsigned long flags;
unsigned long even;
int bit;
bit = wpcm450_gpio_irq_bitnum(gpio, d);
if (bit < 0)
return;
raw_spin_lock_irqsave(&pctrl->lock, flags);
even = ioread32(pctrl->gpio_base + WPCM450_GPEVEN);
__assign_bit(bit, &even, 0);
iowrite32(even, pctrl->gpio_base + WPCM450_GPEVEN);
raw_spin_unlock_irqrestore(&pctrl->lock, flags);
gpiochip_disable_irq(gc, irqd_to_hwirq(d));
}
static void wpcm450_gpio_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct wpcm450_gpio *gpio = gpiochip_get_data(gc);
struct wpcm450_pinctrl *pctrl = gpio->pctrl;
unsigned long flags;
unsigned long even;
int bit;
bit = wpcm450_gpio_irq_bitnum(gpio, d);
if (bit < 0)
return;
gpiochip_enable_irq(gc, irqd_to_hwirq(d));
raw_spin_lock_irqsave(&pctrl->lock, flags);
even = ioread32(pctrl->gpio_base + WPCM450_GPEVEN);
__assign_bit(bit, &even, 1);
iowrite32(even, pctrl->gpio_base + WPCM450_GPEVEN);
raw_spin_unlock_irqrestore(&pctrl->lock, flags);
}
/*
* This is an implementation of the gpio_chip->get() function, for use in
* wpcm450_gpio_fix_evpol. Unfortunately, we can't use the bgpio-provided
* implementation there, because it would require taking gpio_chip->bgpio_lock,
* which is a spin lock, but wpcm450_gpio_fix_evpol must work in contexts where
* a raw spin lock is held.
*/
static int wpcm450_gpio_get(struct wpcm450_gpio *gpio, int offset)
{
void __iomem *reg = gpio->pctrl->gpio_base + gpio->bank->datain;
unsigned long flags;
u32 level;
raw_spin_lock_irqsave(&gpio->pctrl->lock, flags);
level = !!(ioread32(reg) & BIT(offset));
raw_spin_unlock_irqrestore(&gpio->pctrl->lock, flags);
return level;
}
/*
* Since the GPIO controller does not support dual-edge triggered interrupts
* (IRQ_TYPE_EDGE_BOTH), they are emulated using rising/falling edge triggered
* interrupts. wpcm450_gpio_fix_evpol sets the interrupt polarity for the
* specified emulated dual-edge triggered interrupts, so that the next edge can
* be detected.
*/
static void wpcm450_gpio_fix_evpol(struct wpcm450_gpio *gpio, unsigned long all)
{
struct wpcm450_pinctrl *pctrl = gpio->pctrl;
unsigned int bit;
for_each_set_bit(bit, &all, 32) {
int offset = wpcm450_irq_bitnum_to_gpio(gpio, bit);
unsigned long evpol;
unsigned long flags;
int level;
do {
level = wpcm450_gpio_get(gpio, offset);
/* Switch event polarity to the opposite of the current level */
raw_spin_lock_irqsave(&pctrl->lock, flags);
evpol = ioread32(pctrl->gpio_base + WPCM450_GPEVPOL);
__assign_bit(bit, &evpol, !level);
iowrite32(evpol, pctrl->gpio_base + WPCM450_GPEVPOL);
raw_spin_unlock_irqrestore(&pctrl->lock, flags);
} while (wpcm450_gpio_get(gpio, offset) != level);
}
}
static int wpcm450_gpio_set_irq_type(struct irq_data *d, unsigned int flow_type)
{
struct wpcm450_gpio *gpio = gpiochip_get_data(irq_data_get_irq_chip_data(d));
struct wpcm450_pinctrl *pctrl = gpio->pctrl;
unsigned long evtype, evpol;
unsigned long flags;
int ret = 0;
int bit;
bit = wpcm450_gpio_irq_bitnum(gpio, d);
if (bit < 0)
return bit;
irq_set_handler_locked(d, handle_level_irq);
raw_spin_lock_irqsave(&pctrl->lock, flags);
evtype = ioread32(pctrl->gpio_base + WPCM450_GPEVTYPE);
evpol = ioread32(pctrl->gpio_base + WPCM450_GPEVPOL);
__assign_bit(bit, &pctrl->both_edges, 0);
switch (flow_type) {
case IRQ_TYPE_LEVEL_LOW:
__assign_bit(bit, &evtype, 1);
__assign_bit(bit, &evpol, 0);
break;
case IRQ_TYPE_LEVEL_HIGH:
__assign_bit(bit, &evtype, 1);
__assign_bit(bit, &evpol, 1);
break;
case IRQ_TYPE_EDGE_FALLING:
__assign_bit(bit, &evtype, 0);
__assign_bit(bit, &evpol, 0);
break;
case IRQ_TYPE_EDGE_RISING:
__assign_bit(bit, &evtype, 0);
__assign_bit(bit, &evpol, 1);
break;
case IRQ_TYPE_EDGE_BOTH:
__assign_bit(bit, &evtype, 0);
__assign_bit(bit, &pctrl->both_edges, 1);
break;
default:
ret = -EINVAL;
}
iowrite32(evtype, pctrl->gpio_base + WPCM450_GPEVTYPE);
iowrite32(evpol, pctrl->gpio_base + WPCM450_GPEVPOL);
/* clear the event status for good measure */
iowrite32(BIT(bit), pctrl->gpio_base + WPCM450_GPEVST);
raw_spin_unlock_irqrestore(&pctrl->lock, flags);
/* fix event polarity after clearing event status */
wpcm450_gpio_fix_evpol(gpio, BIT(bit));
return ret;
}
static const struct irq_chip wpcm450_gpio_irqchip = {
.name = "WPCM450-GPIO-IRQ",
.irq_ack = wpcm450_gpio_irq_ack,
.irq_unmask = wpcm450_gpio_irq_unmask,
.irq_mask = wpcm450_gpio_irq_mask,
.irq_set_type = wpcm450_gpio_set_irq_type,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static void wpcm450_gpio_irqhandler(struct irq_desc *desc)
{
struct wpcm450_gpio *gpio = gpiochip_get_data(irq_desc_get_handler_data(desc));
struct wpcm450_pinctrl *pctrl = gpio->pctrl;
struct irq_chip *chip = irq_desc_get_chip(desc);
unsigned long pending;
unsigned long flags;
unsigned long ours;
unsigned int bit;
ours = GENMASK(gpio->bank->num_irqs - 1, 0) << gpio->bank->first_irq_bit;
raw_spin_lock_irqsave(&pctrl->lock, flags);
pending = ioread32(pctrl->gpio_base + WPCM450_GPEVST);
pending &= ioread32(pctrl->gpio_base + WPCM450_GPEVEN);
pending &= ours;
raw_spin_unlock_irqrestore(&pctrl->lock, flags);
if (pending & pctrl->both_edges)
wpcm450_gpio_fix_evpol(gpio, pending & pctrl->both_edges);
chained_irq_enter(chip, desc);
for_each_set_bit(bit, &pending, 32) {
int offset = wpcm450_irq_bitnum_to_gpio(gpio, bit);
generic_handle_domain_irq(gpio->gc.irq.domain, offset);
}
chained_irq_exit(chip, desc);
}
static int smb0_pins[] = { 115, 114 };
static int smb1_pins[] = { 117, 116 };
static int smb2_pins[] = { 119, 118 };
static int smb3_pins[] = { 30, 31 };
static int smb4_pins[] = { 28, 29 };
static int smb5_pins[] = { 26, 27 };
static int scs1_pins[] = { 32 };
static int scs2_pins[] = { 33 };
static int scs3_pins[] = { 34 };
static int bsp_pins[] = { 41, 42 };
static int hsp1_pins[] = { 43, 44, 45, 46, 47, 61, 62, 63 };
static int hsp2_pins[] = { 48, 49, 50, 51, 52, 53, 54, 55 };
static int r1err_pins[] = { 56 };
static int r1md_pins[] = { 57, 58 };
static int rmii2_pins[] = { 84, 85, 86, 87, 88, 89 };
static int r2err_pins[] = { 90 };
static int r2md_pins[] = { 91, 92 };
static int kbcc_pins[] = { 94, 93 };
static int clko_pins[] = { 96 };
static int smi_pins[] = { 97 };
static int uinc_pins[] = { 19 };
static int mben_pins[] = {};
static int gspi_pins[] = { 12, 13, 14, 15 };
static int sspi_pins[] = { 12, 13, 14, 15 };
static int xcs1_pins[] = { 35 };
static int xcs2_pins[] = { 36 };
static int sdio_pins[] = { 7, 22, 43, 44, 45, 46, 47, 60 };
static int fi0_pins[] = { 64 };
static int fi1_pins[] = { 65 };
static int fi2_pins[] = { 66 };
static int fi3_pins[] = { 67 };
static int fi4_pins[] = { 68 };
static int fi5_pins[] = { 69 };
static int fi6_pins[] = { 70 };
static int fi7_pins[] = { 71 };
static int fi8_pins[] = { 72 };
static int fi9_pins[] = { 73 };
static int fi10_pins[] = { 74 };
static int fi11_pins[] = { 75 };
static int fi12_pins[] = { 76 };
static int fi13_pins[] = { 77 };
static int fi14_pins[] = { 78 };
static int fi15_pins[] = { 79 };
static int pwm0_pins[] = { 80 };
static int pwm1_pins[] = { 81 };
static int pwm2_pins[] = { 82 };
static int pwm3_pins[] = { 83 };
static int pwm4_pins[] = { 20 };
static int pwm5_pins[] = { 21 };
static int pwm6_pins[] = { 16 };
static int pwm7_pins[] = { 17 };
static int hg0_pins[] = { 20 };
static int hg1_pins[] = { 21 };
static int hg2_pins[] = { 22 };
static int hg3_pins[] = { 23 };
static int hg4_pins[] = { 24 };
static int hg5_pins[] = { 25 };
static int hg6_pins[] = { 59 };
static int hg7_pins[] = { 60 };
#define WPCM450_GRPS \
WPCM450_GRP(smb3), \
WPCM450_GRP(smb4), \
WPCM450_GRP(smb5), \
WPCM450_GRP(scs1), \
WPCM450_GRP(scs2), \
WPCM450_GRP(scs3), \
WPCM450_GRP(smb0), \
WPCM450_GRP(smb1), \
WPCM450_GRP(smb2), \
WPCM450_GRP(bsp), \
WPCM450_GRP(hsp1), \
WPCM450_GRP(hsp2), \
WPCM450_GRP(r1err), \
WPCM450_GRP(r1md), \
WPCM450_GRP(rmii2), \
WPCM450_GRP(r2err), \
WPCM450_GRP(r2md), \
WPCM450_GRP(kbcc), \
WPCM450_GRP(clko), \
WPCM450_GRP(smi), \
WPCM450_GRP(uinc), \
WPCM450_GRP(gspi), \
WPCM450_GRP(mben), \
WPCM450_GRP(xcs2), \
WPCM450_GRP(xcs1), \
WPCM450_GRP(sdio), \
WPCM450_GRP(sspi), \
WPCM450_GRP(fi0), \
WPCM450_GRP(fi1), \
WPCM450_GRP(fi2), \
WPCM450_GRP(fi3), \
WPCM450_GRP(fi4), \
WPCM450_GRP(fi5), \
WPCM450_GRP(fi6), \
WPCM450_GRP(fi7), \
WPCM450_GRP(fi8), \
WPCM450_GRP(fi9), \
WPCM450_GRP(fi10), \
WPCM450_GRP(fi11), \
WPCM450_GRP(fi12), \
WPCM450_GRP(fi13), \
WPCM450_GRP(fi14), \
WPCM450_GRP(fi15), \
WPCM450_GRP(pwm0), \
WPCM450_GRP(pwm1), \
WPCM450_GRP(pwm2), \
WPCM450_GRP(pwm3), \
WPCM450_GRP(pwm4), \
WPCM450_GRP(pwm5), \
WPCM450_GRP(pwm6), \
WPCM450_GRP(pwm7), \
WPCM450_GRP(hg0), \
WPCM450_GRP(hg1), \
WPCM450_GRP(hg2), \
WPCM450_GRP(hg3), \
WPCM450_GRP(hg4), \
WPCM450_GRP(hg5), \
WPCM450_GRP(hg6), \
WPCM450_GRP(hg7), \
enum {
#define WPCM450_GRP(x) fn_ ## x
WPCM450_GRPS
/* add placeholder for none/gpio */
WPCM450_GRP(gpio),
WPCM450_GRP(none),
#undef WPCM450_GRP
};
static struct group_desc wpcm450_groups[] = {
#define WPCM450_GRP(x) { .name = #x, .pins = x ## _pins, \
.num_pins = ARRAY_SIZE(x ## _pins) }
WPCM450_GRPS
#undef WPCM450_GRP
};
#define WPCM450_SFUNC(a) WPCM450_FUNC(a, #a)
#define WPCM450_FUNC(a, b...) static const char *a ## _grp[] = { b }
#define WPCM450_MKFUNC(nm) { .name = #nm, .ngroups = ARRAY_SIZE(nm ## _grp), \
.groups = nm ## _grp }
struct wpcm450_func {
const char *name;
const unsigned int ngroups;
const char *const *groups;
};
WPCM450_SFUNC(smb3);
WPCM450_SFUNC(smb4);
WPCM450_SFUNC(smb5);
WPCM450_SFUNC(scs1);
WPCM450_SFUNC(scs2);
WPCM450_SFUNC(scs3);
WPCM450_SFUNC(smb0);
WPCM450_SFUNC(smb1);
WPCM450_SFUNC(smb2);
WPCM450_SFUNC(bsp);
WPCM450_SFUNC(hsp1);
WPCM450_SFUNC(hsp2);
WPCM450_SFUNC(r1err);
WPCM450_SFUNC(r1md);
WPCM450_SFUNC(rmii2);
WPCM450_SFUNC(r2err);
WPCM450_SFUNC(r2md);
WPCM450_SFUNC(kbcc);
WPCM450_SFUNC(clko);
WPCM450_SFUNC(smi);
WPCM450_SFUNC(uinc);
WPCM450_SFUNC(gspi);
WPCM450_SFUNC(mben);
WPCM450_SFUNC(xcs2);
WPCM450_SFUNC(xcs1);
WPCM450_SFUNC(sdio);
WPCM450_SFUNC(sspi);
WPCM450_SFUNC(fi0);
WPCM450_SFUNC(fi1);
WPCM450_SFUNC(fi2);
WPCM450_SFUNC(fi3);
WPCM450_SFUNC(fi4);
WPCM450_SFUNC(fi5);
WPCM450_SFUNC(fi6);
WPCM450_SFUNC(fi7);
WPCM450_SFUNC(fi8);
WPCM450_SFUNC(fi9);
WPCM450_SFUNC(fi10);
WPCM450_SFUNC(fi11);
WPCM450_SFUNC(fi12);
WPCM450_SFUNC(fi13);
WPCM450_SFUNC(fi14);
WPCM450_SFUNC(fi15);
WPCM450_SFUNC(pwm0);
WPCM450_SFUNC(pwm1);
WPCM450_SFUNC(pwm2);
WPCM450_SFUNC(pwm3);
WPCM450_SFUNC(pwm4);
WPCM450_SFUNC(pwm5);
WPCM450_SFUNC(pwm6);
WPCM450_SFUNC(pwm7);
WPCM450_SFUNC(hg0);
WPCM450_SFUNC(hg1);
WPCM450_SFUNC(hg2);
WPCM450_SFUNC(hg3);
WPCM450_SFUNC(hg4);
WPCM450_SFUNC(hg5);
WPCM450_SFUNC(hg6);
WPCM450_SFUNC(hg7);
#define WPCM450_GRP(x) #x
WPCM450_FUNC(gpio, WPCM450_GRPS);
#undef WPCM450_GRP
/* Function names */
static struct wpcm450_func wpcm450_funcs[] = {
WPCM450_MKFUNC(smb3),
WPCM450_MKFUNC(smb4),
WPCM450_MKFUNC(smb5),
WPCM450_MKFUNC(scs1),
WPCM450_MKFUNC(scs2),
WPCM450_MKFUNC(scs3),
WPCM450_MKFUNC(smb0),
WPCM450_MKFUNC(smb1),
WPCM450_MKFUNC(smb2),
WPCM450_MKFUNC(bsp),
WPCM450_MKFUNC(hsp1),
WPCM450_MKFUNC(hsp2),
WPCM450_MKFUNC(r1err),
WPCM450_MKFUNC(r1md),
WPCM450_MKFUNC(rmii2),
WPCM450_MKFUNC(r2err),
WPCM450_MKFUNC(r2md),
WPCM450_MKFUNC(kbcc),
WPCM450_MKFUNC(clko),
WPCM450_MKFUNC(smi),
WPCM450_MKFUNC(uinc),
WPCM450_MKFUNC(gspi),
WPCM450_MKFUNC(mben),
WPCM450_MKFUNC(xcs2),
WPCM450_MKFUNC(xcs1),
WPCM450_MKFUNC(sdio),
WPCM450_MKFUNC(sspi),
WPCM450_MKFUNC(fi0),
WPCM450_MKFUNC(fi1),
WPCM450_MKFUNC(fi2),
WPCM450_MKFUNC(fi3),
WPCM450_MKFUNC(fi4),
WPCM450_MKFUNC(fi5),
WPCM450_MKFUNC(fi6),
WPCM450_MKFUNC(fi7),
WPCM450_MKFUNC(fi8),
WPCM450_MKFUNC(fi9),
WPCM450_MKFUNC(fi10),
WPCM450_MKFUNC(fi11),
WPCM450_MKFUNC(fi12),
WPCM450_MKFUNC(fi13),
WPCM450_MKFUNC(fi14),
WPCM450_MKFUNC(fi15),
WPCM450_MKFUNC(pwm0),
WPCM450_MKFUNC(pwm1),
WPCM450_MKFUNC(pwm2),
WPCM450_MKFUNC(pwm3),
WPCM450_MKFUNC(pwm4),
WPCM450_MKFUNC(pwm5),
WPCM450_MKFUNC(pwm6),
WPCM450_MKFUNC(pwm7),
WPCM450_MKFUNC(hg0),
WPCM450_MKFUNC(hg1),
WPCM450_MKFUNC(hg2),
WPCM450_MKFUNC(hg3),
WPCM450_MKFUNC(hg4),
WPCM450_MKFUNC(hg5),
WPCM450_MKFUNC(hg6),
WPCM450_MKFUNC(hg7),
WPCM450_MKFUNC(gpio),
};
#define WPCM450_PINCFG(a, b, c, d, e, f, g) \
[a] = { .fn0 = fn_ ## b, .reg0 = WPCM450_GCR_ ## c, .bit0 = d, \
.fn1 = fn_ ## e, .reg1 = WPCM450_GCR_ ## f, .bit1 = g }
struct wpcm450_pincfg {
int fn0, reg0, bit0;
int fn1, reg1, bit1;
};
/* Add this value to bit0 or bit1 to indicate that the MFSEL bit is inverted */
#define INV BIT(5)
static const struct wpcm450_pincfg pincfg[] = {
/* PIN FUNCTION 1 FUNCTION 2 */
WPCM450_PINCFG(0, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(1, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(2, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(3, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(4, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(5, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(6, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(7, none, NONE, 0, sdio, MFSEL1, 30),
WPCM450_PINCFG(8, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(9, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(10, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(11, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(12, gspi, MFSEL1, 24, sspi, MFSEL1, 31),
WPCM450_PINCFG(13, gspi, MFSEL1, 24, sspi, MFSEL1, 31),
WPCM450_PINCFG(14, gspi, MFSEL1, 24, sspi, MFSEL1, 31),
WPCM450_PINCFG(15, gspi, MFSEL1, 24, sspi, MFSEL1, 31),
WPCM450_PINCFG(16, none, NONE, 0, pwm6, MFSEL2, 22),
WPCM450_PINCFG(17, none, NONE, 0, pwm7, MFSEL2, 23),
WPCM450_PINCFG(18, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(19, uinc, MFSEL1, 23, none, NONE, 0),
WPCM450_PINCFG(20, hg0, MFSEL2, 24, pwm4, MFSEL2, 20),
WPCM450_PINCFG(21, hg1, MFSEL2, 25, pwm5, MFSEL2, 21),
WPCM450_PINCFG(22, hg2, MFSEL2, 26, none, NONE, 0),
WPCM450_PINCFG(23, hg3, MFSEL2, 27, none, NONE, 0),
WPCM450_PINCFG(24, hg4, MFSEL2, 28, none, NONE, 0),
WPCM450_PINCFG(25, hg5, MFSEL2, 29, none, NONE, 0),
WPCM450_PINCFG(26, smb5, MFSEL1, 2, none, NONE, 0),
WPCM450_PINCFG(27, smb5, MFSEL1, 2, none, NONE, 0),
WPCM450_PINCFG(28, smb4, MFSEL1, 1, none, NONE, 0),
WPCM450_PINCFG(29, smb4, MFSEL1, 1, none, NONE, 0),
WPCM450_PINCFG(30, smb3, MFSEL1, 0, none, NONE, 0),
WPCM450_PINCFG(31, smb3, MFSEL1, 0, none, NONE, 0),
WPCM450_PINCFG(32, scs1, MFSEL1, 3, none, NONE, 0),
WPCM450_PINCFG(33, scs2, MFSEL1, 4, none, NONE, 0),
WPCM450_PINCFG(34, scs3, MFSEL1, 5 | INV, none, NONE, 0),
WPCM450_PINCFG(35, xcs1, MFSEL1, 29, none, NONE, 0),
WPCM450_PINCFG(36, xcs2, MFSEL1, 28, none, NONE, 0),
WPCM450_PINCFG(37, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(38, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(39, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(40, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(41, bsp, MFSEL1, 9, none, NONE, 0),
WPCM450_PINCFG(42, bsp, MFSEL1, 9, none, NONE, 0),
WPCM450_PINCFG(43, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
WPCM450_PINCFG(44, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
WPCM450_PINCFG(45, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
WPCM450_PINCFG(46, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
WPCM450_PINCFG(47, hsp1, MFSEL1, 10, sdio, MFSEL1, 30),
WPCM450_PINCFG(48, hsp2, MFSEL1, 11, none, NONE, 0),
WPCM450_PINCFG(49, hsp2, MFSEL1, 11, none, NONE, 0),
WPCM450_PINCFG(50, hsp2, MFSEL1, 11, none, NONE, 0),
WPCM450_PINCFG(51, hsp2, MFSEL1, 11, none, NONE, 0),
WPCM450_PINCFG(52, hsp2, MFSEL1, 11, none, NONE, 0),
WPCM450_PINCFG(53, hsp2, MFSEL1, 11, none, NONE, 0),
WPCM450_PINCFG(54, hsp2, MFSEL1, 11, none, NONE, 0),
WPCM450_PINCFG(55, hsp2, MFSEL1, 11, none, NONE, 0),
WPCM450_PINCFG(56, r1err, MFSEL1, 12, none, NONE, 0),
WPCM450_PINCFG(57, r1md, MFSEL1, 13, none, NONE, 0),
WPCM450_PINCFG(58, r1md, MFSEL1, 13, none, NONE, 0),
WPCM450_PINCFG(59, hg6, MFSEL2, 30, none, NONE, 0),
WPCM450_PINCFG(60, hg7, MFSEL2, 31, sdio, MFSEL1, 30),
WPCM450_PINCFG(61, hsp1, MFSEL1, 10, none, NONE, 0),
WPCM450_PINCFG(62, hsp1, MFSEL1, 10, none, NONE, 0),
WPCM450_PINCFG(63, hsp1, MFSEL1, 10, none, NONE, 0),
WPCM450_PINCFG(64, fi0, MFSEL2, 0, none, NONE, 0),
WPCM450_PINCFG(65, fi1, MFSEL2, 1, none, NONE, 0),
WPCM450_PINCFG(66, fi2, MFSEL2, 2, none, NONE, 0),
WPCM450_PINCFG(67, fi3, MFSEL2, 3, none, NONE, 0),
WPCM450_PINCFG(68, fi4, MFSEL2, 4, none, NONE, 0),
WPCM450_PINCFG(69, fi5, MFSEL2, 5, none, NONE, 0),
WPCM450_PINCFG(70, fi6, MFSEL2, 6, none, NONE, 0),
WPCM450_PINCFG(71, fi7, MFSEL2, 7, none, NONE, 0),
WPCM450_PINCFG(72, fi8, MFSEL2, 8, none, NONE, 0),
WPCM450_PINCFG(73, fi9, MFSEL2, 9, none, NONE, 0),
WPCM450_PINCFG(74, fi10, MFSEL2, 10, none, NONE, 0),
WPCM450_PINCFG(75, fi11, MFSEL2, 11, none, NONE, 0),
WPCM450_PINCFG(76, fi12, MFSEL2, 12, none, NONE, 0),
WPCM450_PINCFG(77, fi13, MFSEL2, 13, none, NONE, 0),
WPCM450_PINCFG(78, fi14, MFSEL2, 14, none, NONE, 0),
WPCM450_PINCFG(79, fi15, MFSEL2, 15, none, NONE, 0),
WPCM450_PINCFG(80, pwm0, MFSEL2, 16, none, NONE, 0),
WPCM450_PINCFG(81, pwm1, MFSEL2, 17, none, NONE, 0),
WPCM450_PINCFG(82, pwm2, MFSEL2, 18, none, NONE, 0),
WPCM450_PINCFG(83, pwm3, MFSEL2, 19, none, NONE, 0),
WPCM450_PINCFG(84, rmii2, MFSEL1, 14, none, NONE, 0),
WPCM450_PINCFG(85, rmii2, MFSEL1, 14, none, NONE, 0),
WPCM450_PINCFG(86, rmii2, MFSEL1, 14, none, NONE, 0),
WPCM450_PINCFG(87, rmii2, MFSEL1, 14, none, NONE, 0),
WPCM450_PINCFG(88, rmii2, MFSEL1, 14, none, NONE, 0),
WPCM450_PINCFG(89, rmii2, MFSEL1, 14, none, NONE, 0),
WPCM450_PINCFG(90, r2err, MFSEL1, 15, none, NONE, 0),
WPCM450_PINCFG(91, r2md, MFSEL1, 16, none, NONE, 0),
WPCM450_PINCFG(92, r2md, MFSEL1, 16, none, NONE, 0),
WPCM450_PINCFG(93, kbcc, MFSEL1, 17 | INV, none, NONE, 0),
WPCM450_PINCFG(94, kbcc, MFSEL1, 17 | INV, none, NONE, 0),
WPCM450_PINCFG(95, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(96, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(97, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(98, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(99, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(100, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(101, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(102, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(103, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(104, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(105, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(106, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(107, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(108, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(109, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(110, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(111, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(112, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(113, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(114, smb0, MFSEL1, 6, none, NONE, 0),
WPCM450_PINCFG(115, smb0, MFSEL1, 6, none, NONE, 0),
WPCM450_PINCFG(116, smb1, MFSEL1, 7, none, NONE, 0),
WPCM450_PINCFG(117, smb1, MFSEL1, 7, none, NONE, 0),
WPCM450_PINCFG(118, smb2, MFSEL1, 8, none, NONE, 0),
WPCM450_PINCFG(119, smb2, MFSEL1, 8, none, NONE, 0),
WPCM450_PINCFG(120, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(121, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(122, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(123, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(124, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(125, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(126, none, NONE, 0, none, NONE, 0), /* DVO */
WPCM450_PINCFG(127, none, NONE, 0, none, NONE, 0), /* DVO */
};
#define WPCM450_PIN(n) PINCTRL_PIN(n, "gpio" #n)
static const struct pinctrl_pin_desc wpcm450_pins[] = {
WPCM450_PIN(0), WPCM450_PIN(1), WPCM450_PIN(2), WPCM450_PIN(3),
WPCM450_PIN(4), WPCM450_PIN(5), WPCM450_PIN(6), WPCM450_PIN(7),
WPCM450_PIN(8), WPCM450_PIN(9), WPCM450_PIN(10), WPCM450_PIN(11),
WPCM450_PIN(12), WPCM450_PIN(13), WPCM450_PIN(14), WPCM450_PIN(15),
WPCM450_PIN(16), WPCM450_PIN(17), WPCM450_PIN(18), WPCM450_PIN(19),
WPCM450_PIN(20), WPCM450_PIN(21), WPCM450_PIN(22), WPCM450_PIN(23),
WPCM450_PIN(24), WPCM450_PIN(25), WPCM450_PIN(26), WPCM450_PIN(27),
WPCM450_PIN(28), WPCM450_PIN(29), WPCM450_PIN(30), WPCM450_PIN(31),
WPCM450_PIN(32), WPCM450_PIN(33), WPCM450_PIN(34), WPCM450_PIN(35),
WPCM450_PIN(36), WPCM450_PIN(37), WPCM450_PIN(38), WPCM450_PIN(39),
WPCM450_PIN(40), WPCM450_PIN(41), WPCM450_PIN(42), WPCM450_PIN(43),
WPCM450_PIN(44), WPCM450_PIN(45), WPCM450_PIN(46), WPCM450_PIN(47),
WPCM450_PIN(48), WPCM450_PIN(49), WPCM450_PIN(50), WPCM450_PIN(51),
WPCM450_PIN(52), WPCM450_PIN(53), WPCM450_PIN(54), WPCM450_PIN(55),
WPCM450_PIN(56), WPCM450_PIN(57), WPCM450_PIN(58), WPCM450_PIN(59),
WPCM450_PIN(60), WPCM450_PIN(61), WPCM450_PIN(62), WPCM450_PIN(63),
WPCM450_PIN(64), WPCM450_PIN(65), WPCM450_PIN(66), WPCM450_PIN(67),
WPCM450_PIN(68), WPCM450_PIN(69), WPCM450_PIN(70), WPCM450_PIN(71),
WPCM450_PIN(72), WPCM450_PIN(73), WPCM450_PIN(74), WPCM450_PIN(75),
WPCM450_PIN(76), WPCM450_PIN(77), WPCM450_PIN(78), WPCM450_PIN(79),
WPCM450_PIN(80), WPCM450_PIN(81), WPCM450_PIN(82), WPCM450_PIN(83),
WPCM450_PIN(84), WPCM450_PIN(85), WPCM450_PIN(86), WPCM450_PIN(87),
WPCM450_PIN(88), WPCM450_PIN(89), WPCM450_PIN(90), WPCM450_PIN(91),
WPCM450_PIN(92), WPCM450_PIN(93), WPCM450_PIN(94), WPCM450_PIN(95),
WPCM450_PIN(96), WPCM450_PIN(97), WPCM450_PIN(98), WPCM450_PIN(99),
WPCM450_PIN(100), WPCM450_PIN(101), WPCM450_PIN(102), WPCM450_PIN(103),
WPCM450_PIN(104), WPCM450_PIN(105), WPCM450_PIN(106), WPCM450_PIN(107),
WPCM450_PIN(108), WPCM450_PIN(109), WPCM450_PIN(110), WPCM450_PIN(111),
WPCM450_PIN(112), WPCM450_PIN(113), WPCM450_PIN(114), WPCM450_PIN(115),
WPCM450_PIN(116), WPCM450_PIN(117), WPCM450_PIN(118), WPCM450_PIN(119),
WPCM450_PIN(120), WPCM450_PIN(121), WPCM450_PIN(122), WPCM450_PIN(123),
WPCM450_PIN(124), WPCM450_PIN(125), WPCM450_PIN(126), WPCM450_PIN(127),
};
/* Helper function to update MFSEL field according to the selected function */
static void wpcm450_update_mfsel(struct regmap *gcr_regmap, int reg, int bit, int fn, int fn_selected)
{
bool value = (fn == fn_selected);
if (bit & INV) {
value = !value;
bit &= ~INV;
}
regmap_update_bits(gcr_regmap, reg, BIT(bit), value ? BIT(bit) : 0);
}
/* Enable mode in pin group */
static void wpcm450_setfunc(struct regmap *gcr_regmap, const unsigned int *pin,
int npins, int func)
{
const struct wpcm450_pincfg *cfg;
int i;
for (i = 0; i < npins; i++) {
cfg = &pincfg[pin[i]];
if (func == fn_gpio || cfg->fn0 == func || cfg->fn1 == func) {
if (cfg->reg0)
wpcm450_update_mfsel(gcr_regmap, cfg->reg0,
cfg->bit0, cfg->fn0, func);
if (cfg->reg1)
wpcm450_update_mfsel(gcr_regmap, cfg->reg1,
cfg->bit1, cfg->fn1, func);
}
}
}
static int wpcm450_get_groups_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(wpcm450_groups);
}
static const char *wpcm450_get_group_name(struct pinctrl_dev *pctldev,
unsigned int selector)
{
return wpcm450_groups[selector].name;
}
static int wpcm450_get_group_pins(struct pinctrl_dev *pctldev,
unsigned int selector,
const unsigned int **pins,
unsigned int *npins)
{
*npins = wpcm450_groups[selector].num_pins;
*pins = wpcm450_groups[selector].pins;
return 0;
}
static int wpcm450_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np_config,
struct pinctrl_map **map,
u32 *num_maps)
{
return pinconf_generic_dt_node_to_map(pctldev, np_config,
map, num_maps,
PIN_MAP_TYPE_INVALID);
}
static void wpcm450_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map, u32 num_maps)
{
kfree(map);
}
static const struct pinctrl_ops wpcm450_pinctrl_ops = {
.get_groups_count = wpcm450_get_groups_count,
.get_group_name = wpcm450_get_group_name,
.get_group_pins = wpcm450_get_group_pins,
.dt_node_to_map = wpcm450_dt_node_to_map,
.dt_free_map = wpcm450_dt_free_map,
};
static int wpcm450_get_functions_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(wpcm450_funcs);
}
static const char *wpcm450_get_function_name(struct pinctrl_dev *pctldev,
unsigned int function)
{
return wpcm450_funcs[function].name;
}
static int wpcm450_get_function_groups(struct pinctrl_dev *pctldev,
unsigned int function,
const char * const **groups,
unsigned int * const ngroups)
{
*ngroups = wpcm450_funcs[function].ngroups;
*groups = wpcm450_funcs[function].groups;
return 0;
}
static int wpcm450_pinmux_set_mux(struct pinctrl_dev *pctldev,
unsigned int function,
unsigned int group)
{
struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
wpcm450_setfunc(pctrl->gcr_regmap, wpcm450_groups[group].pins,
wpcm450_groups[group].num_pins, function);
return 0;
}
static const struct pinmux_ops wpcm450_pinmux_ops = {
.get_functions_count = wpcm450_get_functions_count,
.get_function_name = wpcm450_get_function_name,
.get_function_groups = wpcm450_get_function_groups,
.set_mux = wpcm450_pinmux_set_mux,
};
static int debounce_bitnum(int gpio)
{
if (gpio >= 0 && gpio < 16)
return gpio;
return -EINVAL;
}
static int wpcm450_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *config)
{
struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
unsigned long flags;
int bit;
u32 reg;
switch (param) {
case PIN_CONFIG_INPUT_DEBOUNCE:
bit = debounce_bitnum(pin);
if (bit < 0)
return bit;
raw_spin_lock_irqsave(&pctrl->lock, flags);
reg = ioread32(pctrl->gpio_base + WPCM450_GPEVDBNC);
raw_spin_unlock_irqrestore(&pctrl->lock, flags);
*config = pinconf_to_config_packed(param, !!(reg & BIT(bit)));
return 0;
default:
return -ENOTSUPP;
}
}
static int wpcm450_config_set_one(struct wpcm450_pinctrl *pctrl,
unsigned int pin, unsigned long config)
{
enum pin_config_param param = pinconf_to_config_param(config);
unsigned long flags;
unsigned long reg;
int bit;
int arg;
switch (param) {
case PIN_CONFIG_INPUT_DEBOUNCE:
bit = debounce_bitnum(pin);
if (bit < 0)
return bit;
arg = pinconf_to_config_argument(config);
raw_spin_lock_irqsave(&pctrl->lock, flags);
reg = ioread32(pctrl->gpio_base + WPCM450_GPEVDBNC);
__assign_bit(bit, &reg, arg);
iowrite32(reg, pctrl->gpio_base + WPCM450_GPEVDBNC);
raw_spin_unlock_irqrestore(&pctrl->lock, flags);
return 0;
default:
return -ENOTSUPP;
}
}
static int wpcm450_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *configs, unsigned int num_configs)
{
struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
int ret;
while (num_configs--) {
ret = wpcm450_config_set_one(pctrl, pin, *configs++);
if (ret)
return ret;
}
return 0;
}
static const struct pinconf_ops wpcm450_pinconf_ops = {
.is_generic = true,
.pin_config_get = wpcm450_config_get,
.pin_config_set = wpcm450_config_set,
};
static struct pinctrl_desc wpcm450_pinctrl_desc = {
.name = "wpcm450-pinctrl",
.pins = wpcm450_pins,
.npins = ARRAY_SIZE(wpcm450_pins),
.pctlops = &wpcm450_pinctrl_ops,
.pmxops = &wpcm450_pinmux_ops,
.confops = &wpcm450_pinconf_ops,
.owner = THIS_MODULE,
};
static int wpcm450_gpio_set_config(struct gpio_chip *chip,
unsigned int offset, unsigned long config)
{
struct wpcm450_gpio *gpio = gpiochip_get_data(chip);
return wpcm450_config_set_one(gpio->pctrl, offset, config);
}
static int wpcm450_gpio_add_pin_ranges(struct gpio_chip *chip)
{
struct wpcm450_gpio *gpio = gpiochip_get_data(chip);
const struct wpcm450_bank *bank = gpio->bank;
return gpiochip_add_pin_range(&gpio->gc, dev_name(gpio->pctrl->dev),
0, bank->base, bank->length);
}
static int wpcm450_gpio_register(struct platform_device *pdev,
struct wpcm450_pinctrl *pctrl)
{
struct device *dev = &pdev->dev;
struct fwnode_handle *child;
int ret;
pctrl->gpio_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pctrl->gpio_base))
return dev_err_probe(dev, PTR_ERR(pctrl->gpio_base),
"Resource fail for GPIO controller\n");
device_for_each_child_node(dev, child) {
void __iomem *dat = NULL;
void __iomem *set = NULL;
void __iomem *dirout = NULL;
unsigned long flags = 0;
const struct wpcm450_bank *bank;
struct wpcm450_gpio *gpio;
struct gpio_irq_chip *girq;
u32 reg;
int i;
if (!fwnode_property_read_bool(child, "gpio-controller"))
continue;
ret = fwnode_property_read_u32(child, "reg", &reg);
if (ret < 0)
return ret;
gpio = &pctrl->gpio_bank[reg];
gpio->pctrl = pctrl;
if (reg >= WPCM450_NUM_BANKS)
return dev_err_probe(dev, -EINVAL,
"GPIO index %d out of range!\n", reg);
bank = &wpcm450_banks[reg];
gpio->bank = bank;
dat = pctrl->gpio_base + bank->datain;
if (bank->dataout) {
set = pctrl->gpio_base + bank->dataout;
dirout = pctrl->gpio_base + bank->cfg0;
} else {
flags = BGPIOF_NO_OUTPUT;
}
ret = bgpio_init(&gpio->gc, dev, 4,
dat, set, NULL, dirout, NULL, flags);
if (ret < 0)
return dev_err_probe(dev, ret, "GPIO initialization failed\n");
gpio->gc.ngpio = bank->length;
gpio->gc.set_config = wpcm450_gpio_set_config;
gpio->gc.fwnode = child;
gpio->gc.add_pin_ranges = wpcm450_gpio_add_pin_ranges;
girq = &gpio->gc.irq;
gpio_irq_chip_set_chip(girq, &wpcm450_gpio_irqchip);
girq->parent_handler = wpcm450_gpio_irqhandler;
girq->parents = devm_kcalloc(dev, WPCM450_NUM_GPIO_IRQS,
sizeof(*girq->parents), GFP_KERNEL);
if (!girq->parents)
return -ENOMEM;
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_bad_irq;
girq->num_parents = 0;
for (i = 0; i < WPCM450_NUM_GPIO_IRQS; i++) {
int irq;
irq = fwnode_irq_get(child, i);
if (irq < 0)
break;
if (!irq)
continue;
girq->parents[i] = irq;
girq->num_parents++;
}
ret = devm_gpiochip_add_data(dev, &gpio->gc, gpio);
if (ret)
return dev_err_probe(dev, ret, "Failed to add GPIO chip\n");
}
return 0;
}
static int wpcm450_pinctrl_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct wpcm450_pinctrl *pctrl;
int ret;
pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
if (!pctrl)
return -ENOMEM;
pctrl->dev = &pdev->dev;
raw_spin_lock_init(&pctrl->lock);
dev_set_drvdata(dev, pctrl);
pctrl->gcr_regmap =
syscon_regmap_lookup_by_compatible("nuvoton,wpcm450-gcr");
if (IS_ERR(pctrl->gcr_regmap))
return dev_err_probe(dev, PTR_ERR(pctrl->gcr_regmap),
"Failed to find nuvoton,wpcm450-gcr\n");
pctrl->pctldev = devm_pinctrl_register(dev,
&wpcm450_pinctrl_desc, pctrl);
if (IS_ERR(pctrl->pctldev))
return dev_err_probe(dev, PTR_ERR(pctrl->pctldev),
"Failed to register pinctrl device\n");
ret = wpcm450_gpio_register(pdev, pctrl);
if (ret < 0)
return ret;
return 0;
}
static const struct of_device_id wpcm450_pinctrl_match[] = {
{ .compatible = "nuvoton,wpcm450-pinctrl" },
{ }
};
MODULE_DEVICE_TABLE(of, wpcm450_pinctrl_match);
static struct platform_driver wpcm450_pinctrl_driver = {
.probe = wpcm450_pinctrl_probe,
.driver = {
.name = "wpcm450-pinctrl",
.of_match_table = wpcm450_pinctrl_match,
},
};
module_platform_driver(wpcm450_pinctrl_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jonathan Neuschäfer <j.neuschaefer@gmx.net>");
MODULE_DESCRIPTION("Nuvoton WPCM450 Pinctrl and GPIO driver");