linux-stable/drivers/pinctrl/pinctrl-axp209.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AXP20x pinctrl and GPIO driver
*
* Copyright (C) 2016 Maxime Ripard <maxime.ripard@free-electrons.com>
* Copyright (C) 2017 Quentin Schulz <quentin.schulz@free-electrons.com>
*/
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/gpio/driver.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/axp20x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#define AXP20X_GPIO_FUNCTIONS 0x7
#define AXP20X_GPIO_FUNCTION_OUT_LOW 0
#define AXP20X_GPIO_FUNCTION_OUT_HIGH 1
#define AXP20X_GPIO_FUNCTION_INPUT 2
#define AXP20X_FUNC_GPIO_OUT 0
#define AXP20X_FUNC_GPIO_IN 1
#define AXP20X_FUNC_LDO 2
#define AXP20X_FUNC_ADC 3
#define AXP20X_FUNCS_NB 4
#define AXP20X_MUX_GPIO_OUT 0
#define AXP20X_MUX_GPIO_IN BIT(1)
#define AXP20X_MUX_ADC BIT(2)
#define AXP813_MUX_ADC (BIT(2) | BIT(0))
struct axp20x_pctrl_desc {
const struct pinctrl_pin_desc *pins;
unsigned int npins;
/* Stores the pins supporting LDO function. Bit offset is pin number. */
u8 ldo_mask;
/* Stores the pins supporting ADC function. Bit offset is pin number. */
u8 adc_mask;
u8 gpio_status_offset;
u8 adc_mux;
};
struct axp20x_pinctrl_function {
const char *name;
unsigned int muxval;
const char **groups;
unsigned int ngroups;
};
struct axp20x_pctl {
struct gpio_chip chip;
struct regmap *regmap;
struct pinctrl_dev *pctl_dev;
struct device *dev;
const struct axp20x_pctrl_desc *desc;
struct axp20x_pinctrl_function funcs[AXP20X_FUNCS_NB];
};
static const struct pinctrl_pin_desc axp209_pins[] = {
PINCTRL_PIN(0, "GPIO0"),
PINCTRL_PIN(1, "GPIO1"),
PINCTRL_PIN(2, "GPIO2"),
};
static const struct pinctrl_pin_desc axp813_pins[] = {
PINCTRL_PIN(0, "GPIO0"),
PINCTRL_PIN(1, "GPIO1"),
};
static const struct axp20x_pctrl_desc axp20x_data = {
.pins = axp209_pins,
.npins = ARRAY_SIZE(axp209_pins),
.ldo_mask = BIT(0) | BIT(1),
.adc_mask = BIT(0) | BIT(1),
.gpio_status_offset = 4,
.adc_mux = AXP20X_MUX_ADC,
};
static const struct axp20x_pctrl_desc axp813_data = {
.pins = axp813_pins,
.npins = ARRAY_SIZE(axp813_pins),
.ldo_mask = BIT(0) | BIT(1),
.adc_mask = BIT(0),
.gpio_status_offset = 0,
.adc_mux = AXP813_MUX_ADC,
};
static int axp20x_gpio_get_reg(unsigned int offset)
{
switch (offset) {
case 0:
return AXP20X_GPIO0_CTRL;
case 1:
return AXP20X_GPIO1_CTRL;
case 2:
return AXP20X_GPIO2_CTRL;
}
return -EINVAL;
}
static int axp20x_gpio_input(struct gpio_chip *chip, unsigned int offset)
{
return pinctrl_gpio_direction_input(chip->base + offset);
}
static int axp20x_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
struct axp20x_pctl *pctl = gpiochip_get_data(chip);
unsigned int val;
int ret;
ret = regmap_read(pctl->regmap, AXP20X_GPIO20_SS, &val);
if (ret)
return ret;
return !!(val & BIT(offset + pctl->desc->gpio_status_offset));
}
static int axp20x_gpio_get_direction(struct gpio_chip *chip,
unsigned int offset)
{
struct axp20x_pctl *pctl = gpiochip_get_data(chip);
unsigned int val;
int reg, ret;
reg = axp20x_gpio_get_reg(offset);
if (reg < 0)
return reg;
ret = regmap_read(pctl->regmap, reg, &val);
if (ret)
return ret;
/*
* This shouldn't really happen if the pin is in use already,
* or if it's not in use yet, it doesn't matter since we're
* going to change the value soon anyway. Default to output.
*/
if ((val & AXP20X_GPIO_FUNCTIONS) > 2)
return GPIO_LINE_DIRECTION_OUT;
/*
* The GPIO directions are the three lowest values.
* 2 is input, 0 and 1 are output
*/
if (val & 2)
return GPIO_LINE_DIRECTION_IN;
return GPIO_LINE_DIRECTION_OUT;
}
static int axp20x_gpio_output(struct gpio_chip *chip, unsigned int offset,
int value)
{
chip->set(chip, offset, value);
return 0;
}
static void axp20x_gpio_set(struct gpio_chip *chip, unsigned int offset,
int value)
{
struct axp20x_pctl *pctl = gpiochip_get_data(chip);
int reg;
reg = axp20x_gpio_get_reg(offset);
if (reg < 0)
return;
regmap_update_bits(pctl->regmap, reg,
AXP20X_GPIO_FUNCTIONS,
value ? AXP20X_GPIO_FUNCTION_OUT_HIGH :
AXP20X_GPIO_FUNCTION_OUT_LOW);
}
static int axp20x_pmx_set(struct pinctrl_dev *pctldev, unsigned int offset,
u8 config)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
int reg;
reg = axp20x_gpio_get_reg(offset);
if (reg < 0)
return reg;
return regmap_update_bits(pctl->regmap, reg, AXP20X_GPIO_FUNCTIONS,
config);
}
static int axp20x_pmx_func_cnt(struct pinctrl_dev *pctldev)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
return ARRAY_SIZE(pctl->funcs);
}
static const char *axp20x_pmx_func_name(struct pinctrl_dev *pctldev,
unsigned int selector)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->funcs[selector].name;
}
static int axp20x_pmx_func_groups(struct pinctrl_dev *pctldev,
unsigned int selector,
const char * const **groups,
unsigned int *num_groups)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
*groups = pctl->funcs[selector].groups;
*num_groups = pctl->funcs[selector].ngroups;
return 0;
}
static int axp20x_pmx_set_mux(struct pinctrl_dev *pctldev,
unsigned int function, unsigned int group)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
unsigned int mask;
/* Every pin supports GPIO_OUT and GPIO_IN functions */
if (function <= AXP20X_FUNC_GPIO_IN)
return axp20x_pmx_set(pctldev, group,
pctl->funcs[function].muxval);
if (function == AXP20X_FUNC_LDO)
mask = pctl->desc->ldo_mask;
else
mask = pctl->desc->adc_mask;
if (!(BIT(group) & mask))
return -EINVAL;
/*
* We let the regulator framework handle the LDO muxing as muxing bits
* are basically also regulators on/off bits. It's better not to enforce
* any state of the regulator when selecting LDO mux so that we don't
* interfere with the regulator driver.
*/
if (function == AXP20X_FUNC_LDO)
return 0;
return axp20x_pmx_set(pctldev, group, pctl->funcs[function].muxval);
}
static int axp20x_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned int offset, bool input)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
if (input)
return axp20x_pmx_set(pctldev, offset,
pctl->funcs[AXP20X_FUNC_GPIO_IN].muxval);
return axp20x_pmx_set(pctldev, offset,
pctl->funcs[AXP20X_FUNC_GPIO_OUT].muxval);
}
static const struct pinmux_ops axp20x_pmx_ops = {
.get_functions_count = axp20x_pmx_func_cnt,
.get_function_name = axp20x_pmx_func_name,
.get_function_groups = axp20x_pmx_func_groups,
.set_mux = axp20x_pmx_set_mux,
.gpio_set_direction = axp20x_pmx_gpio_set_direction,
.strict = true,
};
static int axp20x_groups_cnt(struct pinctrl_dev *pctldev)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->desc->npins;
}
static int axp20x_group_pins(struct pinctrl_dev *pctldev, unsigned int selector,
const unsigned int **pins, unsigned int *num_pins)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
*pins = (unsigned int *)&pctl->desc->pins[selector];
*num_pins = 1;
return 0;
}
static const char *axp20x_group_name(struct pinctrl_dev *pctldev,
unsigned int selector)
{
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->desc->pins[selector].name;
}
static const struct pinctrl_ops axp20x_pctrl_ops = {
.dt_node_to_map = pinconf_generic_dt_node_to_map_group,
.dt_free_map = pinconf_generic_dt_free_map,
.get_groups_count = axp20x_groups_cnt,
.get_group_name = axp20x_group_name,
.get_group_pins = axp20x_group_pins,
};
static int axp20x_funcs_groups_from_mask(struct device *dev, unsigned int mask,
unsigned int mask_len,
struct axp20x_pinctrl_function *func,
const struct pinctrl_pin_desc *pins)
{
unsigned long int mask_cpy = mask;
const char **group;
unsigned int ngroups = hweight8(mask);
int bit;
func->ngroups = ngroups;
if (func->ngroups > 0) {
treewide: devm_kzalloc() -> devm_kcalloc() The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 21:07:58 +00:00
func->groups = devm_kcalloc(dev,
ngroups, sizeof(const char *),
GFP_KERNEL);
if (!func->groups)
return -ENOMEM;
group = func->groups;
for_each_set_bit(bit, &mask_cpy, mask_len) {
*group = pins[bit].name;
group++;
}
}
return 0;
}
static int axp20x_build_funcs_groups(struct platform_device *pdev)
{
struct axp20x_pctl *pctl = platform_get_drvdata(pdev);
int i, ret, pin, npins = pctl->desc->npins;
pctl->funcs[AXP20X_FUNC_GPIO_OUT].name = "gpio_out";
pctl->funcs[AXP20X_FUNC_GPIO_OUT].muxval = AXP20X_MUX_GPIO_OUT;
pctl->funcs[AXP20X_FUNC_GPIO_IN].name = "gpio_in";
pctl->funcs[AXP20X_FUNC_GPIO_IN].muxval = AXP20X_MUX_GPIO_IN;
pctl->funcs[AXP20X_FUNC_LDO].name = "ldo";
/*
* Muxval for LDO is useless as we won't use it.
* See comment in axp20x_pmx_set_mux.
*/
pctl->funcs[AXP20X_FUNC_ADC].name = "adc";
pctl->funcs[AXP20X_FUNC_ADC].muxval = pctl->desc->adc_mux;
/* Every pin supports GPIO_OUT and GPIO_IN functions */
for (i = 0; i <= AXP20X_FUNC_GPIO_IN; i++) {
pctl->funcs[i].ngroups = npins;
treewide: devm_kzalloc() -> devm_kcalloc() The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 21:07:58 +00:00
pctl->funcs[i].groups = devm_kcalloc(&pdev->dev,
npins, sizeof(char *),
GFP_KERNEL);
if (!pctl->funcs[i].groups)
return -ENOMEM;
for (pin = 0; pin < npins; pin++)
pctl->funcs[i].groups[pin] = pctl->desc->pins[pin].name;
}
ret = axp20x_funcs_groups_from_mask(&pdev->dev, pctl->desc->ldo_mask,
npins, &pctl->funcs[AXP20X_FUNC_LDO],
pctl->desc->pins);
if (ret)
return ret;
ret = axp20x_funcs_groups_from_mask(&pdev->dev, pctl->desc->adc_mask,
npins, &pctl->funcs[AXP20X_FUNC_ADC],
pctl->desc->pins);
if (ret)
return ret;
return 0;
}
static const struct of_device_id axp20x_pctl_match[] = {
{ .compatible = "x-powers,axp209-gpio", .data = &axp20x_data, },
{ .compatible = "x-powers,axp813-gpio", .data = &axp813_data, },
{ }
};
MODULE_DEVICE_TABLE(of, axp20x_pctl_match);
static int axp20x_pctl_probe(struct platform_device *pdev)
{
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct axp20x_pctl *pctl;
struct device *dev = &pdev->dev;
struct pinctrl_desc *pctrl_desc;
int ret;
if (!of_device_is_available(pdev->dev.of_node))
return -ENODEV;
if (!axp20x) {
dev_err(&pdev->dev, "Parent drvdata not set\n");
return -EINVAL;
}
pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
if (!pctl)
return -ENOMEM;
pctl->chip.base = -1;
pctl->chip.can_sleep = true;
pctl->chip.request = gpiochip_generic_request;
pctl->chip.free = gpiochip_generic_free;
pctl->chip.parent = &pdev->dev;
pctl->chip.label = dev_name(&pdev->dev);
pctl->chip.owner = THIS_MODULE;
pctl->chip.get = axp20x_gpio_get;
pctl->chip.get_direction = axp20x_gpio_get_direction;
pctl->chip.set = axp20x_gpio_set;
pctl->chip.direction_input = axp20x_gpio_input;
pctl->chip.direction_output = axp20x_gpio_output;
pctl->desc = of_device_get_match_data(dev);
pctl->chip.ngpio = pctl->desc->npins;
pctl->regmap = axp20x->regmap;
pctl->dev = &pdev->dev;
platform_set_drvdata(pdev, pctl);
ret = axp20x_build_funcs_groups(pdev);
if (ret) {
dev_err(&pdev->dev, "failed to build groups\n");
return ret;
}
pctrl_desc = devm_kzalloc(&pdev->dev, sizeof(*pctrl_desc), GFP_KERNEL);
if (!pctrl_desc)
return -ENOMEM;
pctrl_desc->name = dev_name(&pdev->dev);
pctrl_desc->owner = THIS_MODULE;
pctrl_desc->pins = pctl->desc->pins;
pctrl_desc->npins = pctl->desc->npins;
pctrl_desc->pctlops = &axp20x_pctrl_ops;
pctrl_desc->pmxops = &axp20x_pmx_ops;
pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, pctrl_desc, pctl);
if (IS_ERR(pctl->pctl_dev)) {
dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
return PTR_ERR(pctl->pctl_dev);
}
ret = devm_gpiochip_add_data(&pdev->dev, &pctl->chip, pctl);
if (ret) {
dev_err(&pdev->dev, "Failed to register GPIO chip\n");
return ret;
}
ret = gpiochip_add_pin_range(&pctl->chip, dev_name(&pdev->dev),
pctl->desc->pins->number,
pctl->desc->pins->number,
pctl->desc->npins);
if (ret) {
dev_err(&pdev->dev, "failed to add pin range\n");
return ret;
}
dev_info(&pdev->dev, "AXP209 pinctrl and GPIO driver loaded\n");
return 0;
}
static struct platform_driver axp20x_pctl_driver = {
.probe = axp20x_pctl_probe,
.driver = {
.name = "axp20x-gpio",
.of_match_table = axp20x_pctl_match,
},
};
module_platform_driver(axp20x_pctl_driver);
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
MODULE_DESCRIPTION("AXP20x PMIC pinctrl and GPIO driver");
MODULE_LICENSE("GPL");