// SPDX-License-Identifier: GPL-2.0-only
/*
* CY8C95X0 20 / 40 / 60 pin I2C GPIO port expander with interrupt support
*
* Copyright ( C ) 2022 9 elements GmbH
* Authors : Patrick Rudolph < patrick . rudolph @ 9 elements . com >
* Naresh Solanki < Naresh . Solanki @ 9 elements . com >
*/
#include <linux/acpi.h>
#include <linux/bitmap.h>
#include <linux/cleanup.h>
#include <linux/dmi.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/seq_file.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
/* Fast access registers */
#define CY8C95X0_INPUT 0 x00
#define CY8C95X0_OUTPUT 0 x08
#define CY8C95X0_INTSTATUS 0 x10
#define CY8C95X0_INPUT_(x) (CY8C95X0_INPUT + (x))
#define CY8C95X0_OUTPUT_(x) (CY8C95X0_OUTPUT + (x))
#define CY8C95X0_INTSTATUS_(x) (CY8C95X0_INTSTATUS + (x))
/* Port Select configures the port */
#define CY8C95X0_PORTSEL 0 x18
/* Port settings, write PORTSEL first */
#define CY8C95X0_INTMASK 0 x19
#define CY8C95X0_SELPWM 0 x1A
#define CY8C95X0_INVERT 0 x1B
#define CY8C95X0_DIRECTION 0 x1C
/* Drive mode register change state on writing '1' */
#define CY8C95X0_DRV_PU 0 x1D
#define CY8C95X0_DRV_PD 0 x1E
#define CY8C95X0_DRV_ODH 0 x1F
#define CY8C95X0_DRV_ODL 0 x20
#define CY8C95X0_DRV_PP_FAST 0 x21
#define CY8C95X0_DRV_PP_SLOW 0 x22
#define CY8C95X0_DRV_HIZ 0 x23
/* Internal device configuration */
#define CY8C95X0_ENABLE_WDE 0 x2D
#define CY8C95X0_DEVID 0 x2E
#define CY8C95X0_WATCHDOG 0 x2F
#define CY8C95X0_COMMAND 0 x30
#define CY8C95X0_PIN_TO_OFFSET(x) (((x) >= 20 ) ? ((x) + 4 ) : (x))
#define MAX_BANK 8
#define BANK_SZ 8
#define MAX_LINE (MAX_BANK * BANK_SZ)
#define MUXED_STRIDE 16
#define CY8C95X0_GPIO_MASK GENMASK(7 , 0 )
#define CY8C95X0_VIRTUAL 0 x40
#define CY8C95X0_MUX_REGMAP_TO_OFFSET(x, p) \
(CY8C95X0_VIRTUAL + (x) - CY8C95X0_PORTSEL + (p) * MUXED_STRIDE)
static const struct i2c_device_id cy8c95x0_id[] = {
{ "cy8c9520" , 20 , },
{ "cy8c9540" , 40 , },
{ "cy8c9560" , 60 , },
{ }
};
MODULE_DEVICE_TABLE(i2c, cy8c95x0_id);
#define OF_CY8C95X(__nrgpio) ((void *)(__nrgpio))
static const struct of_device_id cy8c95x0_dt_ids[] = {
{ .compatible = "cypress,cy8c9520" , .data = OF_CY8C95X(20 ), },
{ .compatible = "cypress,cy8c9540" , .data = OF_CY8C95X(40 ), },
{ .compatible = "cypress,cy8c9560" , .data = OF_CY8C95X(60 ), },
{ }
};
MODULE_DEVICE_TABLE(of, cy8c95x0_dt_ids);
static const struct acpi_gpio_params cy8c95x0_irq_gpios = { 0 , 0 , true };
static const struct acpi_gpio_mapping cy8c95x0_acpi_irq_gpios[] = {
{ "irq-gpios" , &cy8c95x0_irq_gpios, 1 , ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER },
{ }
};
static int cy8c95x0_acpi_get_irq(struct device *dev)
{
int ret;
ret = devm_acpi_dev_add_driver_gpios(dev, cy8c95x0_acpi_irq_gpios);
if (ret)
dev_warn(dev, "can't add GPIO ACPI mapping\n" );
ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq" , 0 );
if (ret < 0 )
return ret;
dev_info(dev, "ACPI interrupt quirk (IRQ %d)\n" , ret);
return ret;
}
static const struct dmi_system_id cy8c95x0_dmi_acpi_irq_info[] = {
{
/*
* On Intel Galileo Gen 1 board the IRQ pin is provided
* as an absolute number instead of being relative .
* Since first controller ( gpio - sch . c ) and second
* ( gpio - dwapb . c ) are at the fixed bases , we may safely
* refer to the number in the global space to get an IRQ
* out of it .
*/
.matches = {
DMI_EXACT_MATCH(DMI_BOARD_NAME, "Galileo" ),
},
},
{}
};
/**
* struct cy8c95x0_pinctrl - driver data
* @ regmap : Device ' s regmap . Only direct access registers .
* @ irq_lock : IRQ bus lock
* @ i2c_lock : Mutex to hold while using the regmap
* @ irq_mask : I / O bits affected by interrupts
* @ irq_trig_raise : I / O bits affected by raising voltage level
* @ irq_trig_fall : I / O bits affected by falling voltage level
* @ irq_trig_low : I / O bits affected by a low voltage level
* @ irq_trig_high : I / O bits affected by a high voltage level
* @ push_pull : I / O bits configured as push pull driver
* @ map : Mask used to compensate for Gport2 width
* @ nport : Number of Gports in this chip
* @ gpio_chip : gpiolib chip
* @ driver_data : private driver data
* @ dev : struct device
* @ pctldev : pin controller device
* @ pinctrl_desc : pin controller description
* @ name : Chip controller name
* @ tpin : Total number of pins
* @ gpio_reset : GPIO line handler that can reset the IC
*/
struct cy8c95x0_pinctrl {
struct regmap *regmap;
struct mutex irq_lock;
struct mutex i2c_lock;
DECLARE_BITMAP(irq_mask, MAX_LINE);
DECLARE_BITMAP(irq_trig_raise, MAX_LINE);
DECLARE_BITMAP(irq_trig_fall, MAX_LINE);
DECLARE_BITMAP(irq_trig_low, MAX_LINE);
DECLARE_BITMAP(irq_trig_high, MAX_LINE);
DECLARE_BITMAP(push_pull, MAX_LINE);
DECLARE_BITMAP(map, MAX_LINE);
unsigned int nport;
struct gpio_chip gpio_chip;
unsigned long driver_data;
struct device *dev;
struct pinctrl_dev *pctldev;
struct pinctrl_desc pinctrl_desc;
char name[32 ];
unsigned int tpin;
struct gpio_desc *gpio_reset;
};
static const struct pinctrl_pin_desc cy8c9560_pins[] = {
PINCTRL_PIN(0 , "gp00" ),
PINCTRL_PIN(1 , "gp01" ),
PINCTRL_PIN(2 , "gp02" ),
PINCTRL_PIN(3 , "gp03" ),
PINCTRL_PIN(4 , "gp04" ),
PINCTRL_PIN(5 , "gp05" ),
PINCTRL_PIN(6 , "gp06" ),
PINCTRL_PIN(7 , "gp07" ),
PINCTRL_PIN(8 , "gp10" ),
PINCTRL_PIN(9 , "gp11" ),
PINCTRL_PIN(10 , "gp12" ),
PINCTRL_PIN(11 , "gp13" ),
PINCTRL_PIN(12 , "gp14" ),
PINCTRL_PIN(13 , "gp15" ),
PINCTRL_PIN(14 , "gp16" ),
PINCTRL_PIN(15 , "gp17" ),
PINCTRL_PIN(16 , "gp20" ),
PINCTRL_PIN(17 , "gp21" ),
PINCTRL_PIN(18 , "gp22" ),
PINCTRL_PIN(19 , "gp23" ),
PINCTRL_PIN(20 , "gp30" ),
PINCTRL_PIN(21 , "gp31" ),
PINCTRL_PIN(22 , "gp32" ),
PINCTRL_PIN(23 , "gp33" ),
PINCTRL_PIN(24 , "gp34" ),
PINCTRL_PIN(25 , "gp35" ),
PINCTRL_PIN(26 , "gp36" ),
PINCTRL_PIN(27 , "gp37" ),
PINCTRL_PIN(28 , "gp40" ),
PINCTRL_PIN(29 , "gp41" ),
PINCTRL_PIN(30 , "gp42" ),
PINCTRL_PIN(31 , "gp43" ),
PINCTRL_PIN(32 , "gp44" ),
PINCTRL_PIN(33 , "gp45" ),
PINCTRL_PIN(34 , "gp46" ),
PINCTRL_PIN(35 , "gp47" ),
PINCTRL_PIN(36 , "gp50" ),
PINCTRL_PIN(37 , "gp51" ),
PINCTRL_PIN(38 , "gp52" ),
PINCTRL_PIN(39 , "gp53" ),
PINCTRL_PIN(40 , "gp54" ),
PINCTRL_PIN(41 , "gp55" ),
PINCTRL_PIN(42 , "gp56" ),
PINCTRL_PIN(43 , "gp57" ),
PINCTRL_PIN(44 , "gp60" ),
PINCTRL_PIN(45 , "gp61" ),
PINCTRL_PIN(46 , "gp62" ),
PINCTRL_PIN(47 , "gp63" ),
PINCTRL_PIN(48 , "gp64" ),
PINCTRL_PIN(49 , "gp65" ),
PINCTRL_PIN(50 , "gp66" ),
PINCTRL_PIN(51 , "gp67" ),
PINCTRL_PIN(52 , "gp70" ),
PINCTRL_PIN(53 , "gp71" ),
PINCTRL_PIN(54 , "gp72" ),
PINCTRL_PIN(55 , "gp73" ),
PINCTRL_PIN(56 , "gp74" ),
PINCTRL_PIN(57 , "gp75" ),
PINCTRL_PIN(58 , "gp76" ),
PINCTRL_PIN(59 , "gp77" ),
};
static const char * const cy8c95x0_groups[] = {
"gp00" ,
"gp01" ,
"gp02" ,
"gp03" ,
"gp04" ,
"gp05" ,
"gp06" ,
"gp07" ,
"gp10" ,
"gp11" ,
"gp12" ,
"gp13" ,
"gp14" ,
"gp15" ,
"gp16" ,
"gp17" ,
"gp20" ,
"gp21" ,
"gp22" ,
"gp23" ,
"gp30" ,
"gp31" ,
"gp32" ,
"gp33" ,
"gp34" ,
"gp35" ,
"gp36" ,
"gp37" ,
"gp40" ,
"gp41" ,
"gp42" ,
"gp43" ,
"gp44" ,
"gp45" ,
"gp46" ,
"gp47" ,
"gp50" ,
"gp51" ,
"gp52" ,
"gp53" ,
"gp54" ,
"gp55" ,
"gp56" ,
"gp57" ,
"gp60" ,
"gp61" ,
"gp62" ,
"gp63" ,
"gp64" ,
"gp65" ,
"gp66" ,
"gp67" ,
"gp70" ,
"gp71" ,
"gp72" ,
"gp73" ,
"gp74" ,
"gp75" ,
"gp76" ,
"gp77" ,
};
static inline u8 cypress_get_port(struct cy8c95x0_pinctrl *chip, unsigned int pin)
{
/* Account for GPORT2 which only has 4 bits */
return CY8C95X0_PIN_TO_OFFSET(pin) / BANK_SZ;
}
static int cypress_get_pin_mask(struct cy8c95x0_pinctrl *chip, unsigned int pin)
{
/* Account for GPORT2 which only has 4 bits */
return BIT(CY8C95X0_PIN_TO_OFFSET(pin) % BANK_SZ);
}
static bool cy8c95x0_readable_register(struct device *dev, unsigned int reg)
{
/*
* Only 12 registers are present per port ( see Table 6 in the datasheet ) .
*/
if (reg >= CY8C95X0_VIRTUAL && (reg % MUXED_STRIDE) >= 12 )
return false ;
switch (reg) {
case 0 x24 ... 0 x27:
case 0 x31 ... 0 x3f:
return false ;
default :
return true ;
}
}
static bool cy8c95x0_writeable_register(struct device *dev, unsigned int reg)
{
/*
* Only 12 registers are present per port ( see Table 6 in the datasheet ) .
*/
if (reg >= CY8C95X0_VIRTUAL && (reg % MUXED_STRIDE) >= 12 )
return false ;
switch (reg) {
case CY8C95X0_INPUT_(0 ) ... CY8C95X0_INPUT_(7 ):
return false ;
case CY8C95X0_DEVID:
return false ;
case 0 x24 ... 0 x27:
case 0 x31 ... 0 x3f:
return false ;
default :
return true ;
}
}
static bool cy8c95x0_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CY8C95X0_INPUT_(0 ) ... CY8C95X0_INPUT_(7 ):
case CY8C95X0_INTSTATUS_(0 ) ... CY8C95X0_INTSTATUS_(7 ):
case CY8C95X0_INTMASK:
case CY8C95X0_SELPWM:
case CY8C95X0_INVERT:
case CY8C95X0_DIRECTION:
case CY8C95X0_DRV_PU:
case CY8C95X0_DRV_PD:
case CY8C95X0_DRV_ODH:
case CY8C95X0_DRV_ODL:
case CY8C95X0_DRV_PP_FAST:
case CY8C95X0_DRV_PP_SLOW:
case CY8C95X0_DRV_HIZ:
return true ;
default :
return false ;
}
}
static bool cy8c95x0_precious_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CY8C95X0_INTSTATUS_(0 ) ... CY8C95X0_INTSTATUS_(7 ):
return true ;
default :
return false ;
}
}
static bool cy8c95x0_muxed_register(unsigned int reg)
{
switch (reg) {
case CY8C95X0_INTMASK:
case CY8C95X0_SELPWM:
case CY8C95X0_INVERT:
case CY8C95X0_DIRECTION:
case CY8C95X0_DRV_PU:
case CY8C95X0_DRV_PD:
case CY8C95X0_DRV_ODH:
case CY8C95X0_DRV_ODL:
case CY8C95X0_DRV_PP_FAST:
case CY8C95X0_DRV_PP_SLOW:
case CY8C95X0_DRV_HIZ:
return true ;
default :
return false ;
}
}
static bool cy8c95x0_wc_register(unsigned int reg)
{
switch (reg) {
case CY8C95X0_DRV_PU:
case CY8C95X0_DRV_PD:
case CY8C95X0_DRV_ODH:
case CY8C95X0_DRV_ODL:
case CY8C95X0_DRV_PP_FAST:
case CY8C95X0_DRV_PP_SLOW:
case CY8C95X0_DRV_HIZ:
return true ;
default :
return false ;
}
}
static bool cy8c95x0_quick_path_register(unsigned int reg)
{
switch (reg) {
case CY8C95X0_INPUT_(0 ) ... CY8C95X0_INPUT_(7 ):
case CY8C95X0_INTSTATUS_(0 ) ... CY8C95X0_INTSTATUS_(7 ):
case CY8C95X0_OUTPUT_(0 ) ... CY8C95X0_OUTPUT_(7 ):
return true ;
default :
return false ;
}
}
static const struct regmap_range_cfg cy8c95x0_ranges[] = {
{
.range_min = CY8C95X0_VIRTUAL,
.range_max = 0 , /* Updated at runtime */
.selector_reg = CY8C95X0_PORTSEL,
.selector_mask = 0 x07,
.selector_shift = 0 x0,
.window_start = CY8C95X0_PORTSEL,
.window_len = MUXED_STRIDE,
}
};
static const struct regmap_config cy8c9520_i2c_regmap = {
.reg_bits = 8 ,
.val_bits = 8 ,
.readable_reg = cy8c95x0_readable_register,
.writeable_reg = cy8c95x0_writeable_register,
.volatile_reg = cy8c95x0_volatile_register,
.precious_reg = cy8c95x0_precious_register,
.cache_type = REGCACHE_MAPLE,
.ranges = NULL, /* Updated at runtime */
.num_ranges = 1 ,
.max_register = 0 , /* Updated at runtime */
.num_reg_defaults_raw = 0 , /* Updated at runtime */
.use_single_read = true , /* Workaround for regcache bug */
#if IS_ENABLED(CONFIG_DEBUG_PINCTRL)
.disable_locking = false ,
#else
.disable_locking = true ,
#endif
};
/* Caller should never modify PORTSEL directly */
static int cy8c95x0_regmap_update_bits_base(struct cy8c95x0_pinctrl *chip,
unsigned int reg, unsigned int port,
unsigned int mask, unsigned int val,
bool *change, bool async, bool force)
{
int ret, off, i;
/* Registers behind the PORTSEL mux have their own range in regmap */
if (cy8c95x0_muxed_register(reg)) {
off = CY8C95X0_MUX_REGMAP_TO_OFFSET(reg, port);
} else {
/* Quick path direct access registers honor the port argument */
if (cy8c95x0_quick_path_register(reg))
off = reg + port;
else
off = reg;
}
guard(mutex)(&chip->i2c_lock);
ret = regmap_update_bits_base(chip->regmap, off, mask, val, change, async, force);
if (ret < 0 )
return ret;
/*
* Mimic what hardware does and update the cache when a WC bit is written .
* Allows to mark the registers as non - volatile and reduces I / O cycles .
*/
if (cy8c95x0_wc_register(reg) && (mask & val)) {
/* Writing a 1 clears set bits in the other drive mode registers */
regcache_cache_only(chip->regmap, true );
for (i = CY8C95X0_DRV_PU; i <= CY8C95X0_DRV_HIZ; i++) {
if (i == reg)
continue ;
off = CY8C95X0_MUX_REGMAP_TO_OFFSET(i, port);
regmap_clear_bits(chip->regmap, off, mask & val);
}
regcache_cache_only(chip->regmap, false );
}
return 0 ;
}
/**
* cy8c95x0_regmap_write_bits ( ) - writes a register using the regmap cache
* @ chip : The pinctrl to work on
* @ reg : The register to write to . Can be direct access or muxed register .
* MUST NOT be the PORTSEL register .
* @ port : The port to be used for muxed registers or quick path direct access
* registers . Otherwise unused .
* @ mask : Bitmask to change
* @ val : New value for bitmask
*
* This function handles the register writes to the direct access registers and
* the muxed registers while caching all register accesses , internally handling
* the correct state of the PORTSEL register and protecting the access to muxed
* registers .
* The caller must only use this function to change registers behind the PORTSEL mux .
*
* Return : 0 for successful request , else a corresponding error value
*/
static int cy8c95x0_regmap_write_bits(struct cy8c95x0_pinctrl *chip, unsigned int reg,
unsigned int port, unsigned int mask, unsigned int val)
{
return cy8c95x0_regmap_update_bits_base(chip, reg, port, mask, val, NULL, false , true );
}
/**
* cy8c95x0_regmap_update_bits ( ) - updates a register using the regmap cache
* @ chip : The pinctrl to work on
* @ reg : The register to write to . Can be direct access or muxed register .
* MUST NOT be the PORTSEL register .
* @ port : The port to be used for muxed registers or quick path direct access
* registers . Otherwise unused .
* @ mask : Bitmask to change
* @ val : New value for bitmask
*
* This function handles the register updates to the direct access registers and
* the muxed registers while caching all register accesses , internally handling
* the correct state of the PORTSEL register and protecting the access to muxed
* registers .
* The caller must only use this function to change registers behind the PORTSEL mux .
*
* Return : 0 for successful request , else a corresponding error value
*/
static int cy8c95x0_regmap_update_bits(struct cy8c95x0_pinctrl *chip, unsigned int reg,
unsigned int port, unsigned int mask, unsigned int val)
{
return cy8c95x0_regmap_update_bits_base(chip, reg, port, mask, val, NULL, false , false );
}
/**
* cy8c95x0_regmap_read_bits ( ) - reads a register using the regmap cache
* @ chip : The pinctrl to work on
* @ reg : The register to read from . Can be direct access or muxed register .
* @ port : The port to be used for muxed registers or quick path direct access
* registers . Otherwise unused .
* @ mask : Bitmask to apply
* @ val : Value read from hardware or cache
*
* This function handles the register reads from the direct access registers and
* the muxed registers while caching all register accesses , internally handling
* the correct state of the PORTSEL register and protecting the access to muxed
* registers .
* The caller must only use this function to read registers behind the PORTSEL mux .
*
* Return : 0 for successful request , else a corresponding error value
*/
static int cy8c95x0_regmap_read_bits(struct cy8c95x0_pinctrl *chip, unsigned int reg,
unsigned int port, unsigned int mask, unsigned int *val)
{
unsigned int off;
unsigned int tmp;
int ret;
/* Registers behind the PORTSEL mux have their own range in regmap */
if (cy8c95x0_muxed_register(reg)) {
off = CY8C95X0_MUX_REGMAP_TO_OFFSET(reg, port);
} else {
/* Quick path direct access registers honor the port argument */
if (cy8c95x0_quick_path_register(reg))
off = reg + port;
else
off = reg;
}
scoped_guard(mutex, &chip->i2c_lock)
ret = regmap_read(chip->regmap, off, &tmp);
if (ret)
return ret;
*val = tmp & mask;
return 0 ;
}
static int cy8c95x0_write_regs_mask(struct cy8c95x0_pinctrl *chip, int reg,
unsigned long *val, unsigned long *mask)
{
DECLARE_BITMAP(tmask, MAX_LINE);
DECLARE_BITMAP(tval, MAX_LINE);
unsigned long bits, offset;
int write_val;
int ret;
/* Add the 4 bit gap of Gport2 */
bitmap_scatter(tmask, mask, chip->map, MAX_LINE);
bitmap_scatter(tval, val, chip->map, MAX_LINE);
for_each_set_clump8(offset, bits, tmask, chip->tpin) {
unsigned int i = offset / 8 ;
write_val = bitmap_get_value8(tval, offset);
ret = cy8c95x0_regmap_update_bits(chip, reg, i, bits, write_val);
if (ret < 0 ) {
dev_err(chip->dev, "failed writing register %d, port %u: err %d\n" , reg, i, ret);
return ret;
}
}
return 0 ;
}
static int cy8c95x0_read_regs_mask(struct cy8c95x0_pinctrl *chip, int reg,
unsigned long *val, unsigned long *mask)
{
DECLARE_BITMAP(tmask, MAX_LINE);
DECLARE_BITMAP(tval, MAX_LINE);
unsigned long bits, offset;
unsigned int read_val;
int ret;
/* Add the 4 bit gap of Gport2 */
bitmap_scatter(tmask, mask, chip->map, MAX_LINE);
bitmap_scatter(tval, val, chip->map, MAX_LINE);
for_each_set_clump8(offset, bits, tmask, chip->tpin) {
unsigned int i = offset / 8 ;
ret = cy8c95x0_regmap_read_bits(chip, reg, i, bits, &read_val);
if (ret < 0 ) {
dev_err(chip->dev, "failed reading register %d, port %u: err %d\n" , reg, i, ret);
return ret;
}
read_val |= bitmap_get_value8(tval, offset) & ~bits;
bitmap_set_value8(tval, read_val, offset);
}
/* Fill the 4 bit gap of Gport2 */
bitmap_gather(val, tval, chip->map, MAX_LINE);
return 0 ;
}
static int cy8c95x0_pinmux_direction(struct cy8c95x0_pinctrl *chip, unsigned int pin, bool input)
{
u8 port = cypress_get_port(chip, pin);
u8 bit = cypress_get_pin_mask(chip, pin);
int ret;
ret = cy8c95x0_regmap_write_bits(chip, CY8C95X0_DIRECTION, port, bit, input ? bit : 0 );
if (ret)
return ret;
/*
* Disable driving the pin by forcing it to HighZ . Only setting
* the direction register isn ' t sufficient in Push - Pull mode .
*/
if (input && test_bit(pin, chip->push_pull)) {
ret = cy8c95x0_regmap_write_bits(chip, CY8C95X0_DRV_HIZ, port, bit, bit);
if (ret)
return ret;
__clear_bit(pin, chip->push_pull);
}
return 0 ;
}
static int cy8c95x0_gpio_direction_input(struct gpio_chip *gc, unsigned int off)
{
return pinctrl_gpio_direction_input(gc, off);
}
static int cy8c95x0_gpio_direction_output(struct gpio_chip *gc,
unsigned int off, int val)
{
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
u8 port = cypress_get_port(chip, off);
u8 bit = cypress_get_pin_mask(chip, off);
int ret;
/* Set output level */
ret = cy8c95x0_regmap_write_bits(chip, CY8C95X0_OUTPUT, port, bit, val ? bit : 0 );
if (ret)
return ret;
return pinctrl_gpio_direction_output(gc, off);
}
static int cy8c95x0_gpio_get_value(struct gpio_chip *gc, unsigned int off)
{
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
u8 port = cypress_get_port(chip, off);
u8 bit = cypress_get_pin_mask(chip, off);
unsigned int reg_val;
int ret;
ret = cy8c95x0_regmap_read_bits(chip, CY8C95X0_INPUT, port, bit, ®_val);
if (ret < 0 ) {
/*
* NOTE :
* Diagnostic already emitted ; that ' s all we should
* do unless gpio_ * _ value_cansleep ( ) calls become different
* from their nonsleeping siblings ( and report faults ) .
*/
return 0 ;
}
return reg_val ? 1 : 0 ;
}
static int cy8c95x0_gpio_set_value(struct gpio_chip *gc, unsigned int off,
int val)
{
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
u8 port = cypress_get_port(chip, off);
u8 bit = cypress_get_pin_mask(chip, off);
return cy8c95x0_regmap_write_bits(chip, CY8C95X0_OUTPUT, port, bit,
val ? bit : 0 );
}
static int cy8c95x0_gpio_get_direction(struct gpio_chip *gc, unsigned int off)
{
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
u8 port = cypress_get_port(chip, off);
u8 bit = cypress_get_pin_mask(chip, off);
unsigned int reg_val;
int ret;
ret = cy8c95x0_regmap_read_bits(chip, CY8C95X0_DIRECTION, port, bit, ®_val);
if (ret < 0 )
return ret;
if (reg_val)
return GPIO_LINE_DIRECTION_IN;
return GPIO_LINE_DIRECTION_OUT;
}
static int cy8c95x0_gpio_get_pincfg(struct cy8c95x0_pinctrl *chip,
unsigned int off,
unsigned long *config)
{
enum pin_config_param param = pinconf_to_config_param(*config);
u8 port = cypress_get_port(chip, off);
u8 bit = cypress_get_pin_mask(chip, off);
unsigned int reg_val;
unsigned int reg;
u16 arg = 0 ;
int ret;
switch (param) {
case PIN_CONFIG_BIAS_PULL_UP:
reg = CY8C95X0_DRV_PU;
break ;
case PIN_CONFIG_BIAS_PULL_DOWN:
reg = CY8C95X0_DRV_PD;
break ;
case PIN_CONFIG_BIAS_DISABLE:
reg = CY8C95X0_DRV_HIZ;
break ;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
reg = CY8C95X0_DRV_ODL;
break ;
case PIN_CONFIG_DRIVE_OPEN_SOURCE:
reg = CY8C95X0_DRV_ODH;
break ;
case PIN_CONFIG_DRIVE_PUSH_PULL:
reg = CY8C95X0_DRV_PP_FAST;
break ;
case PIN_CONFIG_INPUT_ENABLE:
reg = CY8C95X0_DIRECTION;
break ;
case PIN_CONFIG_MODE_PWM:
reg = CY8C95X0_SELPWM;
break ;
case PIN_CONFIG_OUTPUT:
reg = CY8C95X0_OUTPUT;
break ;
case PIN_CONFIG_OUTPUT_ENABLE:
reg = CY8C95X0_DIRECTION;
break ;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
case PIN_CONFIG_BIAS_BUS_HOLD:
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
case PIN_CONFIG_DRIVE_STRENGTH:
case PIN_CONFIG_DRIVE_STRENGTH_UA:
case PIN_CONFIG_INPUT_DEBOUNCE:
case PIN_CONFIG_INPUT_SCHMITT:
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
case PIN_CONFIG_MODE_LOW_POWER:
case PIN_CONFIG_PERSIST_STATE:
case PIN_CONFIG_POWER_SOURCE:
case PIN_CONFIG_SKEW_DELAY:
case PIN_CONFIG_SLEEP_HARDWARE_STATE:
case PIN_CONFIG_SLEW_RATE:
default :
return -ENOTSUPP;
}
/*
* Writing 1 to one of the drive mode registers will automatically
* clear conflicting set bits in the other drive mode registers .
*/
ret = cy8c95x0_regmap_read_bits(chip, reg, port, bit, ®_val);
if (ret < 0 )
return ret;
if (reg_val)
arg = 1 ;
if (param == PIN_CONFIG_OUTPUT_ENABLE)
arg = !arg;
*config = pinconf_to_config_packed(param, arg);
return 0 ;
}
static int cy8c95x0_gpio_set_pincfg(struct cy8c95x0_pinctrl *chip,
unsigned int off,
unsigned long config)
{
u8 port = cypress_get_port(chip, off);
u8 bit = cypress_get_pin_mask(chip, off);
unsigned long param = pinconf_to_config_param(config);
unsigned long arg = pinconf_to_config_argument(config);
unsigned int reg;
switch (param) {
case PIN_CONFIG_BIAS_PULL_UP:
__clear_bit(off, chip->push_pull);
reg = CY8C95X0_DRV_PU;
break ;
case PIN_CONFIG_BIAS_PULL_DOWN:
__clear_bit(off, chip->push_pull);
reg = CY8C95X0_DRV_PD;
break ;
case PIN_CONFIG_BIAS_DISABLE:
__clear_bit(off, chip->push_pull);
reg = CY8C95X0_DRV_HIZ;
break ;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
__clear_bit(off, chip->push_pull);
reg = CY8C95X0_DRV_ODL;
break ;
case PIN_CONFIG_DRIVE_OPEN_SOURCE:
__clear_bit(off, chip->push_pull);
reg = CY8C95X0_DRV_ODH;
break ;
case PIN_CONFIG_DRIVE_PUSH_PULL:
__set_bit(off, chip->push_pull);
reg = CY8C95X0_DRV_PP_FAST;
break ;
case PIN_CONFIG_MODE_PWM:
reg = CY8C95X0_SELPWM;
break ;
case PIN_CONFIG_OUTPUT_ENABLE:
return cy8c95x0_pinmux_direction(chip, off, !arg);
case PIN_CONFIG_INPUT_ENABLE:
return cy8c95x0_pinmux_direction(chip, off, arg);
default :
return -ENOTSUPP;
}
/*
* Writing 1 to one of the drive mode registers will automatically
* clear conflicting set bits in the other drive mode registers .
*/
return cy8c95x0_regmap_write_bits(chip, reg, port, bit, bit);
}
static int cy8c95x0_gpio_get_multiple(struct gpio_chip *gc,
unsigned long *mask, unsigned long *bits)
{
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
return cy8c95x0_read_regs_mask(chip, CY8C95X0_INPUT, bits, mask);
}
static int cy8c95x0_gpio_set_multiple(struct gpio_chip *gc,
unsigned long *mask, unsigned long *bits)
{
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
return cy8c95x0_write_regs_mask(chip, CY8C95X0_OUTPUT, bits, mask);
}
static int cy8c95x0_add_pin_ranges(struct gpio_chip *gc)
{
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
struct device *dev = chip->dev;
int ret;
ret = gpiochip_add_pin_range(gc, dev_name(dev), 0 , 0 , chip->tpin);
if (ret)
dev_err(dev, "failed to add GPIO pin range\n" );
return ret;
}
static int cy8c95x0_setup_gpiochip(struct cy8c95x0_pinctrl *chip)
{
struct gpio_chip *gc = &chip->gpio_chip;
gc->request = gpiochip_generic_request;
gc->free = gpiochip_generic_free;
gc->direction_input = cy8c95x0_gpio_direction_input;
gc->direction_output = cy8c95x0_gpio_direction_output;
gc->get = cy8c95x0_gpio_get_value;
gc->set = cy8c95x0_gpio_set_value;
gc->get_direction = cy8c95x0_gpio_get_direction;
gc->get_multiple = cy8c95x0_gpio_get_multiple;
gc->set_multiple = cy8c95x0_gpio_set_multiple;
gc->set_config = gpiochip_generic_config;
gc->can_sleep = true ;
gc->add_pin_ranges = cy8c95x0_add_pin_ranges;
gc->base = -1 ;
gc->ngpio = chip->tpin;
gc->parent = chip->dev;
gc->owner = THIS_MODULE;
gc->names = NULL;
gc->label = dev_name(chip->dev);
return devm_gpiochip_add_data(chip->dev, gc, chip);
}
static void cy8c95x0_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
set_bit(hwirq, chip->irq_mask);
gpiochip_disable_irq(gc, hwirq);
}
static void cy8c95x0_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
gpiochip_enable_irq(gc, hwirq);
clear_bit(hwirq, chip->irq_mask);
}
static void cy8c95x0_irq_bus_lock(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
mutex_lock(&chip->irq_lock);
}
static void cy8c95x0_irq_bus_sync_unlock(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
DECLARE_BITMAP(ones, MAX_LINE);
DECLARE_BITMAP(irq_mask, MAX_LINE);
DECLARE_BITMAP(reg_direction, MAX_LINE);
bitmap_fill(ones, MAX_LINE);
cy8c95x0_write_regs_mask(chip, CY8C95X0_INTMASK, chip->irq_mask, ones);
/* Switch direction to input if needed */
cy8c95x0_read_regs_mask(chip, CY8C95X0_DIRECTION, reg_direction, chip->irq_mask);
bitmap_or(irq_mask, chip->irq_mask, reg_direction, MAX_LINE);
bitmap_complement(irq_mask, irq_mask, MAX_LINE);
/* Look for any newly setup interrupt */
cy8c95x0_write_regs_mask(chip, CY8C95X0_DIRECTION, ones, irq_mask);
mutex_unlock(&chip->irq_lock);
}
static int cy8c95x0_irq_set_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
unsigned int trig_type;
switch (type) {
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_EDGE_FALLING:
case IRQ_TYPE_EDGE_BOTH:
trig_type = type;
break ;
case IRQ_TYPE_LEVEL_HIGH:
trig_type = IRQ_TYPE_EDGE_RISING;
break ;
case IRQ_TYPE_LEVEL_LOW:
trig_type = IRQ_TYPE_EDGE_FALLING;
break ;
default :
dev_err(chip->dev, "irq %d: unsupported type %d\n" , d->irq, type);
return -EINVAL;
}
assign_bit(hwirq, chip->irq_trig_fall, trig_type & IRQ_TYPE_EDGE_FALLING);
assign_bit(hwirq, chip->irq_trig_raise, trig_type & IRQ_TYPE_EDGE_RISING);
assign_bit(hwirq, chip->irq_trig_low, type == IRQ_TYPE_LEVEL_LOW);
assign_bit(hwirq, chip->irq_trig_high, type == IRQ_TYPE_LEVEL_HIGH);
return 0 ;
}
static void cy8c95x0_irq_shutdown(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct cy8c95x0_pinctrl *chip = gpiochip_get_data(gc);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
clear_bit(hwirq, chip->irq_trig_raise);
clear_bit(hwirq, chip->irq_trig_fall);
clear_bit(hwirq, chip->irq_trig_low);
clear_bit(hwirq, chip->irq_trig_high);
}
static const struct irq_chip cy8c95x0_irqchip = {
.name = "cy8c95x0-irq" ,
.irq_mask = cy8c95x0_irq_mask,
.irq_unmask = cy8c95x0_irq_unmask,
.irq_bus_lock = cy8c95x0_irq_bus_lock,
.irq_bus_sync_unlock = cy8c95x0_irq_bus_sync_unlock,
.irq_set_type = cy8c95x0_irq_set_type,
.irq_shutdown = cy8c95x0_irq_shutdown,
.flags = IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
static bool cy8c95x0_irq_pending(struct cy8c95x0_pinctrl *chip, unsigned long *pending)
{
DECLARE_BITMAP(ones, MAX_LINE);
DECLARE_BITMAP(cur_stat, MAX_LINE);
DECLARE_BITMAP(new_stat, MAX_LINE);
DECLARE_BITMAP(trigger, MAX_LINE);
bitmap_fill(ones, MAX_LINE);
/* Read the current interrupt status from the device */
if (cy8c95x0_read_regs_mask(chip, CY8C95X0_INTSTATUS, trigger, ones))
return false ;
/* Check latched inputs */
if (cy8c95x0_read_regs_mask(chip, CY8C95X0_INPUT, cur_stat, trigger))
return false ;
/* Apply filter for rising/falling edge selection */
bitmap_replace(new_stat, chip->irq_trig_fall, chip->irq_trig_raise,
cur_stat, MAX_LINE);
bitmap_and(pending, new_stat, trigger, MAX_LINE);
return !bitmap_empty(pending, MAX_LINE);
}
static irqreturn_t cy8c95x0_irq_handler(int irq, void *devid)
{
struct cy8c95x0_pinctrl *chip = devid;
struct gpio_chip *gc = &chip->gpio_chip;
DECLARE_BITMAP(pending, MAX_LINE);
int nested_irq, level;
bool ret;
ret = cy8c95x0_irq_pending(chip, pending);
if (!ret)
return IRQ_RETVAL(0 );
ret = false ;
for_each_set_bit(level, pending, MAX_LINE) {
/* Already accounted for 4bit gap in GPort2 */
nested_irq = irq_find_mapping(gc->irq.domain, level);
if (unlikely(nested_irq <= 0 )) {
dev_warn_ratelimited(gc->parent, "unmapped interrupt %d\n" , level);
continue ;
}
if (test_bit(level, chip->irq_trig_low))
while (!cy8c95x0_gpio_get_value(gc, level))
handle_nested_irq(nested_irq);
else if (test_bit(level, chip->irq_trig_high))
while (cy8c95x0_gpio_get_value(gc, level))
handle_nested_irq(nested_irq);
else
handle_nested_irq(nested_irq);
ret = true ;
}
return IRQ_RETVAL(ret);
}
static int cy8c95x0_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
return chip->tpin;
}
static const char *cy8c95x0_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
unsigned int group)
{
return cy8c95x0_groups[group];
}
static int cy8c95x0_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned int group,
const unsigned int **pins,
unsigned int *num_pins)
{
*pins = &cy8c9560_pins[group].number;
*num_pins = 1 ;
return 0 ;
}
static const char *cy8c95x0_get_fname(unsigned int selector)
{
if (selector == 0 )
return "gpio" ;
else
return "pwm" ;
}
static void cy8c95x0_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
unsigned int pin)
{
struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
DECLARE_BITMAP(mask, MAX_LINE);
DECLARE_BITMAP(pwm, MAX_LINE);
bitmap_zero(mask, MAX_LINE);
__set_bit(pin, mask);
if (cy8c95x0_read_regs_mask(chip, CY8C95X0_SELPWM, pwm, mask)) {
seq_puts(s, "not available" );
return ;
}
seq_printf(s, "MODE:%s" , cy8c95x0_get_fname(test_bit(pin, pwm)));
}
static const struct pinctrl_ops cy8c95x0_pinctrl_ops = {
.get_groups_count = cy8c95x0_pinctrl_get_groups_count,
.get_group_name = cy8c95x0_pinctrl_get_group_name,
.get_group_pins = cy8c95x0_pinctrl_get_group_pins,
#ifdef CONFIG_OF
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.dt_free_map = pinconf_generic_dt_free_map,
#endif
.pin_dbg_show = cy8c95x0_pin_dbg_show,
};
static const char *cy8c95x0_get_function_name(struct pinctrl_dev *pctldev, unsigned int selector)
{
return cy8c95x0_get_fname(selector);
}
static int cy8c95x0_get_functions_count(struct pinctrl_dev *pctldev)
{
return 2 ;
}
static int cy8c95x0_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector,
const char * const **groups,
unsigned int * const num_groups)
{
struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
*groups = cy8c95x0_groups;
*num_groups = chip->tpin;
return 0 ;
}
static int cy8c95x0_set_mode(struct cy8c95x0_pinctrl *chip, unsigned int off, bool mode)
{
u8 port = cypress_get_port(chip, off);
u8 bit = cypress_get_pin_mask(chip, off);
return cy8c95x0_regmap_write_bits(chip, CY8C95X0_SELPWM, port, bit, mode ? bit : 0 );
}
static int cy8c95x0_pinmux_mode(struct cy8c95x0_pinctrl *chip,
unsigned int selector, unsigned int group)
{
u8 port = cypress_get_port(chip, group);
u8 bit = cypress_get_pin_mask(chip, group);
int ret;
ret = cy8c95x0_set_mode(chip, group, selector);
if (ret < 0 )
return ret;
if (selector == 0 )
return 0 ;
/* Set direction to output & set output to 1 so that PWM can work */
ret = cy8c95x0_regmap_write_bits(chip, CY8C95X0_DIRECTION, port, bit, bit);
if (ret < 0 )
return ret;
return cy8c95x0_regmap_write_bits(chip, CY8C95X0_OUTPUT, port, bit, bit);
}
static int cy8c95x0_set_mux(struct pinctrl_dev *pctldev, unsigned int selector,
unsigned int group)
{
struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
return cy8c95x0_pinmux_mode(chip, selector, group);
}
static int cy8c95x0_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int pin)
{
struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
return cy8c95x0_set_mode(chip, pin, false );
}
static int cy8c95x0_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int pin, bool input)
{
struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
return cy8c95x0_pinmux_direction(chip, pin, input);
}
static const struct pinmux_ops cy8c95x0_pmxops = {
.get_functions_count = cy8c95x0_get_functions_count,
.get_function_name = cy8c95x0_get_function_name,
.get_function_groups = cy8c95x0_get_function_groups,
.set_mux = cy8c95x0_set_mux,
.gpio_request_enable = cy8c95x0_gpio_request_enable,
.gpio_set_direction = cy8c95x0_gpio_set_direction,
.strict = true ,
};
static int cy8c95x0_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *config)
{
struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
return cy8c95x0_gpio_get_pincfg(chip, pin, config);
}
static int cy8c95x0_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *configs, unsigned int num_configs)
{
struct cy8c95x0_pinctrl *chip = pinctrl_dev_get_drvdata(pctldev);
int ret;
int i;
for (i = 0 ; i < num_configs; i++) {
ret = cy8c95x0_gpio_set_pincfg(chip, pin, configs[i]);
if (ret)
return ret;
}
return 0 ;
}
static const struct pinconf_ops cy8c95x0_pinconf_ops = {
.pin_config_get = cy8c95x0_pinconf_get,
.pin_config_set = cy8c95x0_pinconf_set,
.is_generic = true ,
};
static int cy8c95x0_irq_setup(struct cy8c95x0_pinctrl *chip, int irq)
{
struct gpio_irq_chip *girq = &chip->gpio_chip.irq;
DECLARE_BITMAP(pending_irqs, MAX_LINE);
int ret;
mutex_init(&chip->irq_lock);
bitmap_zero(pending_irqs, MAX_LINE);
/* Read IRQ status register to clear all pending interrupts */
ret = cy8c95x0_irq_pending(chip, pending_irqs);
if (ret) {
dev_err(chip->dev, "failed to clear irq status register\n" );
return ret;
}
/* Mask all interrupts */
bitmap_fill(chip->irq_mask, MAX_LINE);
gpio_irq_chip_set_chip(girq, &cy8c95x0_irqchip);
/* This will let us handle the parent IRQ in the driver */
girq->parent_handler = NULL;
girq->num_parents = 0 ;
girq->parents = NULL;
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_simple_irq;
girq->threaded = true ;
ret = devm_request_threaded_irq(chip->dev, irq,
NULL, cy8c95x0_irq_handler,
IRQF_ONESHOT | IRQF_SHARED,
dev_name(chip->dev), chip);
if (ret) {
dev_err(chip->dev, "failed to request irq %d\n" , irq);
return ret;
}
dev_info(chip->dev, "Registered threaded IRQ\n" );
return 0 ;
}
static int cy8c95x0_setup_pinctrl(struct cy8c95x0_pinctrl *chip)
{
struct pinctrl_desc *pd = &chip->pinctrl_desc;
pd->pctlops = &cy8c95x0_pinctrl_ops;
pd->confops = &cy8c95x0_pinconf_ops;
pd->pmxops = &cy8c95x0_pmxops;
pd->name = dev_name(chip->dev);
pd->pins = cy8c9560_pins;
pd->npins = chip->tpin;
pd->owner = THIS_MODULE;
chip->pctldev = devm_pinctrl_register(chip->dev, pd, chip);
if (IS_ERR(chip->pctldev))
return dev_err_probe(chip->dev, PTR_ERR(chip->pctldev),
"can't register controller\n" );
return 0 ;
}
static int cy8c95x0_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int ret;
const char *name;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
ret = i2c_smbus_read_byte_data(client, CY8C95X0_DEVID);
if (ret < 0 )
return ret;
switch (ret & GENMASK(7 , 4 )) {
case 0 x20:
name = cy8c95x0_id[0 ].name;
break ;
case 0 x40:
name = cy8c95x0_id[1 ].name;
break ;
case 0 x60:
name = cy8c95x0_id[2 ].name;
break ;
default :
return -ENODEV;
}
dev_info(&client->dev, "Found a %s chip at 0x%02x.\n" , name, client->addr);
strscpy(info->type, name);
return 0 ;
}
static int cy8c95x0_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct cy8c95x0_pinctrl *chip;
struct regmap_config regmap_conf;
struct regmap_range_cfg regmap_range_conf;
int ret;
chip = devm_kzalloc(dev, sizeof (*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->dev = dev;
/* Set the device type */
chip->driver_data = (uintptr_t)i2c_get_match_data(client);
if (!chip->driver_data)
return -ENODEV;
chip->tpin = chip->driver_data & CY8C95X0_GPIO_MASK;
chip->nport = DIV_ROUND_UP(CY8C95X0_PIN_TO_OFFSET(chip->tpin), BANK_SZ);
memcpy(®map_range_conf, &cy8c95x0_ranges[0 ], sizeof (regmap_range_conf));
switch (chip->tpin) {
case 20 :
strscpy(chip->name, cy8c95x0_id[0 ].name);
regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 3 * MUXED_STRIDE - 1 ;
break ;
case 40 :
strscpy(chip->name, cy8c95x0_id[1 ].name);
regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 6 * MUXED_STRIDE - 1 ;
break ;
case 60 :
strscpy(chip->name, cy8c95x0_id[2 ].name);
regmap_range_conf.range_max = CY8C95X0_VIRTUAL + 8 * MUXED_STRIDE - 1 ;
break ;
default :
return -ENODEV;
}
ret = devm_regulator_get_enable(dev, "vdd" );
if (ret)
return dev_err_probe(dev, ret, "failed to enable regulator vdd\n" );
/* bring the chip out of reset if reset pin is provided */
chip->gpio_reset = devm_gpiod_get_optional(dev, "reset" , GPIOD_OUT_HIGH);
if (IS_ERR(chip->gpio_reset))
return dev_err_probe(dev, PTR_ERR(chip->gpio_reset), "Failed to get GPIO 'reset'\n" );
gpiod_set_consumer_name(chip->gpio_reset, "CY8C95X0 RESET" );
if (chip->gpio_reset) {
fsleep(1000 );
gpiod_set_value_cansleep(chip->gpio_reset, 0 );
fsleep(250000 );
}
/* Regmap for direct and paged registers */
memcpy(®map_conf, &cy8c9520_i2c_regmap, sizeof (regmap_conf));
regmap_conf.ranges = ®map_range_conf;
regmap_conf.max_register = regmap_range_conf.range_max;
regmap_conf.num_reg_defaults_raw = regmap_range_conf.range_max;
chip->regmap = devm_regmap_init_i2c(client, ®map_conf);
if (IS_ERR(chip->regmap))
return PTR_ERR(chip->regmap);
bitmap_zero(chip->push_pull, MAX_LINE);
/* Setup HW pins mapping */
bitmap_fill(chip->map, MAX_LINE);
bitmap_clear(chip->map, 20 , 4 );
mutex_init(&chip->i2c_lock);
if (dmi_first_match(cy8c95x0_dmi_acpi_irq_info)) {
ret = cy8c95x0_acpi_get_irq(&client->dev);
if (ret > 0 )
client->irq = ret;
}
if (client->irq) {
ret = cy8c95x0_irq_setup(chip, client->irq);
if (ret)
return ret;
}
ret = cy8c95x0_setup_pinctrl(chip);
if (ret)
return ret;
return cy8c95x0_setup_gpiochip(chip);
}
static const struct acpi_device_id cy8c95x0_acpi_ids[] = {
{ "INT3490" , 40 , },
{ }
};
MODULE_DEVICE_TABLE(acpi, cy8c95x0_acpi_ids);
static struct i2c_driver cy8c95x0_driver = {
.driver = {
.name = "cy8c95x0-pinctrl" ,
.of_match_table = cy8c95x0_dt_ids,
.acpi_match_table = cy8c95x0_acpi_ids,
},
.probe = cy8c95x0_probe,
.id_table = cy8c95x0_id,
.detect = cy8c95x0_detect,
};
module_i2c_driver(cy8c95x0_driver);
MODULE_AUTHOR("Patrick Rudolph <patrick.rudolph@9elements.com>" );
MODULE_AUTHOR("Naresh Solanki <naresh.solanki@9elements.com>" );
MODULE_DESCRIPTION("Pinctrl driver for CY8C95X0" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=97 H=100 G=98
¤ Dauer der Verarbeitung: 0.21 Sekunden
(vorverarbeitet am 2026-09-29)
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