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linux-next/drivers/pinctrl/pinctrl-amd.h
Daniel Drake 79d2c8bede pinctrl/amd: save pin registers over suspend/resume 
The touchpad in the Asus laptop models X505BA/BP and X542BA/BP is
unresponsive after suspend/resume. The following error appears during
resume:

  i2c_hid i2c-ELAN1300:00: failed to reset device.

The problem here is that i2c_hid does not notice the interrupt being
generated at this point, because the GPIO is no longer configured
for interrupts.

Fix this by saving pinctrl-amd pin registers during suspend and
restoring them at resume time.

Based on code from pinctrl-intel.

Cc: stable@vger.kernel.org
Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-09-12 15:58:45 +02:00

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/*
* GPIO driver for AMD
*
* Copyright (c) 2014,2015 Ken Xue <Ken.Xue@amd.com>
* Jeff Wu <Jeff.Wu@amd.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
*/
#ifndef _PINCTRL_AMD_H
#define _PINCTRL_AMD_H
#define AMD_GPIO_PINS_PER_BANK 64
#define AMD_GPIO_PINS_BANK0 63
#define AMD_GPIO_PINS_BANK1 64
#define AMD_GPIO_PINS_BANK2 56
#define AMD_GPIO_PINS_BANK3 32
#define WAKE_INT_MASTER_REG 0xfc
#define EOI_MASK (1 << 29)
#define WAKE_INT_STATUS_REG0 0x2f8
#define WAKE_INT_STATUS_REG1 0x2fc
#define DB_TMR_OUT_OFF 0
#define DB_TMR_OUT_UNIT_OFF 4
#define DB_CNTRL_OFF 5
#define DB_TMR_LARGE_OFF 7
#define LEVEL_TRIG_OFF 8
#define ACTIVE_LEVEL_OFF 9
#define INTERRUPT_ENABLE_OFF 11
#define INTERRUPT_MASK_OFF 12
#define WAKE_CNTRL_OFF_S0I3 13
#define WAKE_CNTRL_OFF_S3 14
#define WAKE_CNTRL_OFF_S4 15
#define PIN_STS_OFF 16
#define DRV_STRENGTH_SEL_OFF 17
#define PULL_UP_SEL_OFF 19
#define PULL_UP_ENABLE_OFF 20
#define PULL_DOWN_ENABLE_OFF 21
#define OUTPUT_VALUE_OFF 22
#define OUTPUT_ENABLE_OFF 23
#define SW_CNTRL_IN_OFF 24
#define SW_CNTRL_EN_OFF 25
#define INTERRUPT_STS_OFF 28
#define WAKE_STS_OFF 29
#define DB_TMR_OUT_MASK 0xFUL
#define DB_CNTRl_MASK 0x3UL
#define ACTIVE_LEVEL_MASK 0x3UL
#define DRV_STRENGTH_SEL_MASK 0x3UL
#define DB_TYPE_NO_DEBOUNCE 0x0UL
#define DB_TYPE_PRESERVE_LOW_GLITCH 0x1UL
#define DB_TYPE_PRESERVE_HIGH_GLITCH 0x2UL
#define DB_TYPE_REMOVE_GLITCH 0x3UL
#define EDGE_TRAGGER 0x0UL
#define LEVEL_TRIGGER 0x1UL
#define ACTIVE_HIGH 0x0UL
#define ACTIVE_LOW 0x1UL
#define BOTH_EADGE 0x2UL
#define ENABLE_INTERRUPT 0x1UL
#define DISABLE_INTERRUPT 0x0UL
#define ENABLE_INTERRUPT_MASK 0x0UL
#define DISABLE_INTERRUPT_MASK 0x1UL
#define CLR_INTR_STAT 0x1UL
struct amd_pingroup {
const char *name;
const unsigned *pins;
unsigned npins;
};
struct amd_function {
const char *name;
const char * const *groups;
unsigned ngroups;
};
struct amd_gpio {
raw_spinlock_t lock;
void __iomem *base;
const struct amd_pingroup *groups;
u32 ngroups;
struct pinctrl_dev *pctrl;
struct gpio_chip gc;
unsigned int hwbank_num;
struct resource *res;
struct platform_device *pdev;
u32 *saved_regs;
};
/* KERNCZ configuration*/
static const struct pinctrl_pin_desc kerncz_pins[] = {
PINCTRL_PIN(0, "GPIO_0"),
PINCTRL_PIN(1, "GPIO_1"),
PINCTRL_PIN(2, "GPIO_2"),
PINCTRL_PIN(3, "GPIO_3"),
PINCTRL_PIN(4, "GPIO_4"),
PINCTRL_PIN(5, "GPIO_5"),
PINCTRL_PIN(6, "GPIO_6"),
PINCTRL_PIN(7, "GPIO_7"),
PINCTRL_PIN(8, "GPIO_8"),
PINCTRL_PIN(9, "GPIO_9"),
PINCTRL_PIN(10, "GPIO_10"),
PINCTRL_PIN(11, "GPIO_11"),
PINCTRL_PIN(12, "GPIO_12"),
PINCTRL_PIN(13, "GPIO_13"),
PINCTRL_PIN(14, "GPIO_14"),
PINCTRL_PIN(15, "GPIO_15"),
PINCTRL_PIN(16, "GPIO_16"),
PINCTRL_PIN(17, "GPIO_17"),
PINCTRL_PIN(18, "GPIO_18"),
PINCTRL_PIN(19, "GPIO_19"),
PINCTRL_PIN(20, "GPIO_20"),
PINCTRL_PIN(23, "GPIO_23"),
PINCTRL_PIN(24, "GPIO_24"),
PINCTRL_PIN(25, "GPIO_25"),
PINCTRL_PIN(26, "GPIO_26"),
PINCTRL_PIN(39, "GPIO_39"),
PINCTRL_PIN(40, "GPIO_40"),
PINCTRL_PIN(43, "GPIO_42"),
PINCTRL_PIN(46, "GPIO_46"),
PINCTRL_PIN(47, "GPIO_47"),
PINCTRL_PIN(48, "GPIO_48"),
PINCTRL_PIN(49, "GPIO_49"),
PINCTRL_PIN(50, "GPIO_50"),
PINCTRL_PIN(51, "GPIO_51"),
PINCTRL_PIN(52, "GPIO_52"),
PINCTRL_PIN(53, "GPIO_53"),
PINCTRL_PIN(54, "GPIO_54"),
PINCTRL_PIN(55, "GPIO_55"),
PINCTRL_PIN(56, "GPIO_56"),
PINCTRL_PIN(57, "GPIO_57"),
PINCTRL_PIN(58, "GPIO_58"),
PINCTRL_PIN(59, "GPIO_59"),
PINCTRL_PIN(60, "GPIO_60"),
PINCTRL_PIN(61, "GPIO_61"),
PINCTRL_PIN(62, "GPIO_62"),
PINCTRL_PIN(64, "GPIO_64"),
PINCTRL_PIN(65, "GPIO_65"),
PINCTRL_PIN(66, "GPIO_66"),
PINCTRL_PIN(68, "GPIO_68"),
PINCTRL_PIN(69, "GPIO_69"),
PINCTRL_PIN(70, "GPIO_70"),
PINCTRL_PIN(71, "GPIO_71"),
PINCTRL_PIN(72, "GPIO_72"),
PINCTRL_PIN(74, "GPIO_74"),
PINCTRL_PIN(75, "GPIO_75"),
PINCTRL_PIN(76, "GPIO_76"),
PINCTRL_PIN(84, "GPIO_84"),
PINCTRL_PIN(85, "GPIO_85"),
PINCTRL_PIN(86, "GPIO_86"),
PINCTRL_PIN(87, "GPIO_87"),
PINCTRL_PIN(88, "GPIO_88"),
PINCTRL_PIN(89, "GPIO_89"),
PINCTRL_PIN(90, "GPIO_90"),
PINCTRL_PIN(91, "GPIO_91"),
PINCTRL_PIN(92, "GPIO_92"),
PINCTRL_PIN(93, "GPIO_93"),
PINCTRL_PIN(95, "GPIO_95"),
PINCTRL_PIN(96, "GPIO_96"),
PINCTRL_PIN(97, "GPIO_97"),
PINCTRL_PIN(98, "GPIO_98"),
PINCTRL_PIN(99, "GPIO_99"),
PINCTRL_PIN(100, "GPIO_100"),
PINCTRL_PIN(101, "GPIO_101"),
PINCTRL_PIN(102, "GPIO_102"),
PINCTRL_PIN(113, "GPIO_113"),
PINCTRL_PIN(114, "GPIO_114"),
PINCTRL_PIN(115, "GPIO_115"),
PINCTRL_PIN(116, "GPIO_116"),
PINCTRL_PIN(117, "GPIO_117"),
PINCTRL_PIN(118, "GPIO_118"),
PINCTRL_PIN(119, "GPIO_119"),
PINCTRL_PIN(120, "GPIO_120"),
PINCTRL_PIN(121, "GPIO_121"),
PINCTRL_PIN(122, "GPIO_122"),
PINCTRL_PIN(126, "GPIO_126"),
PINCTRL_PIN(129, "GPIO_129"),
PINCTRL_PIN(130, "GPIO_130"),
PINCTRL_PIN(131, "GPIO_131"),
PINCTRL_PIN(132, "GPIO_132"),
PINCTRL_PIN(133, "GPIO_133"),
PINCTRL_PIN(135, "GPIO_135"),
PINCTRL_PIN(136, "GPIO_136"),
PINCTRL_PIN(137, "GPIO_137"),
PINCTRL_PIN(138, "GPIO_138"),
PINCTRL_PIN(139, "GPIO_139"),
PINCTRL_PIN(140, "GPIO_140"),
PINCTRL_PIN(141, "GPIO_141"),
PINCTRL_PIN(142, "GPIO_142"),
PINCTRL_PIN(143, "GPIO_143"),
PINCTRL_PIN(144, "GPIO_144"),
PINCTRL_PIN(145, "GPIO_145"),
PINCTRL_PIN(146, "GPIO_146"),
PINCTRL_PIN(147, "GPIO_147"),
PINCTRL_PIN(148, "GPIO_148"),
PINCTRL_PIN(166, "GPIO_166"),
PINCTRL_PIN(167, "GPIO_167"),
PINCTRL_PIN(168, "GPIO_168"),
PINCTRL_PIN(169, "GPIO_169"),
PINCTRL_PIN(170, "GPIO_170"),
PINCTRL_PIN(171, "GPIO_171"),
PINCTRL_PIN(172, "GPIO_172"),
PINCTRL_PIN(173, "GPIO_173"),
PINCTRL_PIN(174, "GPIO_174"),
PINCTRL_PIN(175, "GPIO_175"),
PINCTRL_PIN(176, "GPIO_176"),
PINCTRL_PIN(177, "GPIO_177"),
};
static const unsigned i2c0_pins[] = {145, 146};
static const unsigned i2c1_pins[] = {147, 148};
static const unsigned i2c2_pins[] = {113, 114};
static const unsigned i2c3_pins[] = {19, 20};
static const unsigned uart0_pins[] = {135, 136, 137, 138, 139};
static const unsigned uart1_pins[] = {140, 141, 142, 143, 144};
static const struct amd_pingroup kerncz_groups[] = {
{
.name = "i2c0",
.pins = i2c0_pins,
.npins = 2,
},
{
.name = "i2c1",
.pins = i2c1_pins,
.npins = 2,
},
{
.name = "i2c2",
.pins = i2c2_pins,
.npins = 2,
},
{
.name = "i2c3",
.pins = i2c3_pins,
.npins = 2,
},
{
.name = "uart0",
.pins = uart0_pins,
.npins = 9,
},
{
.name = "uart1",
.pins = uart1_pins,
.npins = 5,
},
};
#endif
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