![Kees Cook](/assets/img/avatar_default.png)
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>
513 lines
12 KiB
C
513 lines
12 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
|
|
/*
|
|
* Microsemi SoCs pinctrl driver
|
|
*
|
|
* Author: <alexandre.belloni@free-electrons.com>
|
|
* License: Dual MIT/GPL
|
|
* Copyright (c) 2017 Microsemi Corporation
|
|
*/
|
|
|
|
#include <linux/gpio/driver.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/pinctrl/pinctrl.h>
|
|
#include <linux/pinctrl/pinmux.h>
|
|
#include <linux/pinctrl/pinconf.h>
|
|
#include <linux/pinctrl/pinconf-generic.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "core.h"
|
|
#include "pinconf.h"
|
|
#include "pinmux.h"
|
|
|
|
#define OCELOT_GPIO_OUT_SET 0x0
|
|
#define OCELOT_GPIO_OUT_CLR 0x4
|
|
#define OCELOT_GPIO_OUT 0x8
|
|
#define OCELOT_GPIO_IN 0xc
|
|
#define OCELOT_GPIO_OE 0x10
|
|
#define OCELOT_GPIO_INTR 0x14
|
|
#define OCELOT_GPIO_INTR_ENA 0x18
|
|
#define OCELOT_GPIO_INTR_IDENT 0x1c
|
|
#define OCELOT_GPIO_ALT0 0x20
|
|
#define OCELOT_GPIO_ALT1 0x24
|
|
#define OCELOT_GPIO_SD_MAP 0x28
|
|
|
|
#define OCELOT_PINS 22
|
|
#define OCELOT_FUNC_PER_PIN 4
|
|
|
|
enum {
|
|
FUNC_NONE,
|
|
FUNC_GPIO,
|
|
FUNC_IRQ0_IN,
|
|
FUNC_IRQ0_OUT,
|
|
FUNC_IRQ1_IN,
|
|
FUNC_IRQ1_OUT,
|
|
FUNC_MIIM1,
|
|
FUNC_PCI_WAKE,
|
|
FUNC_PTP0,
|
|
FUNC_PTP1,
|
|
FUNC_PTP2,
|
|
FUNC_PTP3,
|
|
FUNC_PWM,
|
|
FUNC_RECO_CLK0,
|
|
FUNC_RECO_CLK1,
|
|
FUNC_SFP0,
|
|
FUNC_SFP1,
|
|
FUNC_SFP2,
|
|
FUNC_SFP3,
|
|
FUNC_SFP4,
|
|
FUNC_SFP5,
|
|
FUNC_SG0,
|
|
FUNC_SI,
|
|
FUNC_TACHO,
|
|
FUNC_TWI,
|
|
FUNC_TWI_SCL_M,
|
|
FUNC_UART,
|
|
FUNC_UART2,
|
|
FUNC_MAX
|
|
};
|
|
|
|
static const char *const ocelot_function_names[] = {
|
|
[FUNC_NONE] = "none",
|
|
[FUNC_GPIO] = "gpio",
|
|
[FUNC_IRQ0_IN] = "irq0_in",
|
|
[FUNC_IRQ0_OUT] = "irq0_out",
|
|
[FUNC_IRQ1_IN] = "irq1_in",
|
|
[FUNC_IRQ1_OUT] = "irq1_out",
|
|
[FUNC_MIIM1] = "miim1",
|
|
[FUNC_PCI_WAKE] = "pci_wake",
|
|
[FUNC_PTP0] = "ptp0",
|
|
[FUNC_PTP1] = "ptp1",
|
|
[FUNC_PTP2] = "ptp2",
|
|
[FUNC_PTP3] = "ptp3",
|
|
[FUNC_PWM] = "pwm",
|
|
[FUNC_RECO_CLK0] = "reco_clk0",
|
|
[FUNC_RECO_CLK1] = "reco_clk1",
|
|
[FUNC_SFP0] = "sfp0",
|
|
[FUNC_SFP1] = "sfp1",
|
|
[FUNC_SFP2] = "sfp2",
|
|
[FUNC_SFP3] = "sfp3",
|
|
[FUNC_SFP4] = "sfp4",
|
|
[FUNC_SFP5] = "sfp5",
|
|
[FUNC_SG0] = "sg0",
|
|
[FUNC_SI] = "si",
|
|
[FUNC_TACHO] = "tacho",
|
|
[FUNC_TWI] = "twi",
|
|
[FUNC_TWI_SCL_M] = "twi_scl_m",
|
|
[FUNC_UART] = "uart",
|
|
[FUNC_UART2] = "uart2",
|
|
};
|
|
|
|
struct ocelot_pmx_func {
|
|
const char **groups;
|
|
unsigned int ngroups;
|
|
};
|
|
|
|
struct ocelot_pin_caps {
|
|
unsigned int pin;
|
|
unsigned char functions[OCELOT_FUNC_PER_PIN];
|
|
};
|
|
|
|
struct ocelot_pinctrl {
|
|
struct device *dev;
|
|
struct pinctrl_dev *pctl;
|
|
struct gpio_chip gpio_chip;
|
|
struct regmap *map;
|
|
struct ocelot_pmx_func func[FUNC_MAX];
|
|
};
|
|
|
|
#define OCELOT_P(p, f0, f1, f2) \
|
|
static struct ocelot_pin_caps ocelot_pin_##p = { \
|
|
.pin = p, \
|
|
.functions = { \
|
|
FUNC_GPIO, FUNC_##f0, FUNC_##f1, FUNC_##f2, \
|
|
}, \
|
|
}
|
|
|
|
OCELOT_P(0, SG0, NONE, NONE);
|
|
OCELOT_P(1, SG0, NONE, NONE);
|
|
OCELOT_P(2, SG0, NONE, NONE);
|
|
OCELOT_P(3, SG0, NONE, NONE);
|
|
OCELOT_P(4, IRQ0_IN, IRQ0_OUT, TWI);
|
|
OCELOT_P(5, IRQ1_IN, IRQ1_OUT, PCI_WAKE);
|
|
OCELOT_P(6, UART, TWI_SCL_M, NONE);
|
|
OCELOT_P(7, UART, TWI_SCL_M, NONE);
|
|
OCELOT_P(8, SI, TWI_SCL_M, IRQ0_OUT);
|
|
OCELOT_P(9, SI, TWI_SCL_M, IRQ1_OUT);
|
|
OCELOT_P(10, PTP2, TWI_SCL_M, SFP0);
|
|
OCELOT_P(11, PTP3, TWI_SCL_M, SFP1);
|
|
OCELOT_P(12, UART2, TWI_SCL_M, SFP2);
|
|
OCELOT_P(13, UART2, TWI_SCL_M, SFP3);
|
|
OCELOT_P(14, MIIM1, TWI_SCL_M, SFP4);
|
|
OCELOT_P(15, MIIM1, TWI_SCL_M, SFP5);
|
|
OCELOT_P(16, TWI, NONE, SI);
|
|
OCELOT_P(17, TWI, TWI_SCL_M, SI);
|
|
OCELOT_P(18, PTP0, TWI_SCL_M, NONE);
|
|
OCELOT_P(19, PTP1, TWI_SCL_M, NONE);
|
|
OCELOT_P(20, RECO_CLK0, TACHO, NONE);
|
|
OCELOT_P(21, RECO_CLK1, PWM, NONE);
|
|
|
|
#define OCELOT_PIN(n) { \
|
|
.number = n, \
|
|
.name = "GPIO_"#n, \
|
|
.drv_data = &ocelot_pin_##n \
|
|
}
|
|
|
|
static const struct pinctrl_pin_desc ocelot_pins[] = {
|
|
OCELOT_PIN(0),
|
|
OCELOT_PIN(1),
|
|
OCELOT_PIN(2),
|
|
OCELOT_PIN(3),
|
|
OCELOT_PIN(4),
|
|
OCELOT_PIN(5),
|
|
OCELOT_PIN(6),
|
|
OCELOT_PIN(7),
|
|
OCELOT_PIN(8),
|
|
OCELOT_PIN(9),
|
|
OCELOT_PIN(10),
|
|
OCELOT_PIN(11),
|
|
OCELOT_PIN(12),
|
|
OCELOT_PIN(13),
|
|
OCELOT_PIN(14),
|
|
OCELOT_PIN(15),
|
|
OCELOT_PIN(16),
|
|
OCELOT_PIN(17),
|
|
OCELOT_PIN(18),
|
|
OCELOT_PIN(19),
|
|
OCELOT_PIN(20),
|
|
OCELOT_PIN(21),
|
|
};
|
|
|
|
static int ocelot_get_functions_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
return ARRAY_SIZE(ocelot_function_names);
|
|
}
|
|
|
|
static const char *ocelot_get_function_name(struct pinctrl_dev *pctldev,
|
|
unsigned int function)
|
|
{
|
|
return ocelot_function_names[function];
|
|
}
|
|
|
|
static int ocelot_get_function_groups(struct pinctrl_dev *pctldev,
|
|
unsigned int function,
|
|
const char *const **groups,
|
|
unsigned *const num_groups)
|
|
{
|
|
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
*groups = info->func[function].groups;
|
|
*num_groups = info->func[function].ngroups;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ocelot_pin_function_idx(unsigned int pin, unsigned int function)
|
|
{
|
|
struct ocelot_pin_caps *p = ocelot_pins[pin].drv_data;
|
|
int i;
|
|
|
|
for (i = 0; i < OCELOT_FUNC_PER_PIN; i++) {
|
|
if (function == p->functions[i])
|
|
return i;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int ocelot_pinmux_set_mux(struct pinctrl_dev *pctldev,
|
|
unsigned int selector, unsigned int group)
|
|
{
|
|
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
struct ocelot_pin_caps *pin = ocelot_pins[group].drv_data;
|
|
int f;
|
|
|
|
f = ocelot_pin_function_idx(group, selector);
|
|
if (f < 0)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* f is encoded on two bits.
|
|
* bit 0 of f goes in BIT(pin) of ALT0, bit 1 of f goes in BIT(pin) of
|
|
* ALT1
|
|
* This is racy because both registers can't be updated at the same time
|
|
* but it doesn't matter much for now.
|
|
*/
|
|
regmap_update_bits(info->map, OCELOT_GPIO_ALT0, BIT(pin->pin),
|
|
f << pin->pin);
|
|
regmap_update_bits(info->map, OCELOT_GPIO_ALT1, BIT(pin->pin),
|
|
f << (pin->pin - 1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ocelot_gpio_set_direction(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range,
|
|
unsigned int pin, bool input)
|
|
{
|
|
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
regmap_update_bits(info->map, OCELOT_GPIO_OE, BIT(pin),
|
|
input ? 0 : BIT(pin));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ocelot_gpio_request_enable(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range,
|
|
unsigned int offset)
|
|
{
|
|
struct ocelot_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
regmap_update_bits(info->map, OCELOT_GPIO_ALT0, BIT(offset), 0);
|
|
regmap_update_bits(info->map, OCELOT_GPIO_ALT1, BIT(offset), 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pinmux_ops ocelot_pmx_ops = {
|
|
.get_functions_count = ocelot_get_functions_count,
|
|
.get_function_name = ocelot_get_function_name,
|
|
.get_function_groups = ocelot_get_function_groups,
|
|
.set_mux = ocelot_pinmux_set_mux,
|
|
.gpio_set_direction = ocelot_gpio_set_direction,
|
|
.gpio_request_enable = ocelot_gpio_request_enable,
|
|
};
|
|
|
|
static int ocelot_pctl_get_groups_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
return ARRAY_SIZE(ocelot_pins);
|
|
}
|
|
|
|
static const char *ocelot_pctl_get_group_name(struct pinctrl_dev *pctldev,
|
|
unsigned int group)
|
|
{
|
|
return ocelot_pins[group].name;
|
|
}
|
|
|
|
static int ocelot_pctl_get_group_pins(struct pinctrl_dev *pctldev,
|
|
unsigned int group,
|
|
const unsigned int **pins,
|
|
unsigned int *num_pins)
|
|
{
|
|
*pins = &ocelot_pins[group].number;
|
|
*num_pins = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pinctrl_ops ocelot_pctl_ops = {
|
|
.get_groups_count = ocelot_pctl_get_groups_count,
|
|
.get_group_name = ocelot_pctl_get_group_name,
|
|
.get_group_pins = ocelot_pctl_get_group_pins,
|
|
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
|
|
.dt_free_map = pinconf_generic_dt_free_map,
|
|
};
|
|
|
|
static struct pinctrl_desc ocelot_desc = {
|
|
.name = "ocelot-pinctrl",
|
|
.pins = ocelot_pins,
|
|
.npins = ARRAY_SIZE(ocelot_pins),
|
|
.pctlops = &ocelot_pctl_ops,
|
|
.pmxops = &ocelot_pmx_ops,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int ocelot_create_group_func_map(struct device *dev,
|
|
struct ocelot_pinctrl *info)
|
|
{
|
|
u16 pins[ARRAY_SIZE(ocelot_pins)];
|
|
int f, npins, i;
|
|
|
|
for (f = 0; f < FUNC_MAX; f++) {
|
|
for (npins = 0, i = 0; i < ARRAY_SIZE(ocelot_pins); i++) {
|
|
if (ocelot_pin_function_idx(i, f) >= 0)
|
|
pins[npins++] = i;
|
|
}
|
|
|
|
info->func[f].ngroups = npins;
|
|
info->func[f].groups = devm_kcalloc(dev,
|
|
npins,
|
|
sizeof(char *),
|
|
GFP_KERNEL);
|
|
if (!info->func[f].groups)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < npins; i++)
|
|
info->func[f].groups[i] = ocelot_pins[pins[i]].name;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ocelot_pinctrl_register(struct platform_device *pdev,
|
|
struct ocelot_pinctrl *info)
|
|
{
|
|
int ret;
|
|
|
|
ret = ocelot_create_group_func_map(&pdev->dev, info);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Unable to create group func map.\n");
|
|
return ret;
|
|
}
|
|
|
|
info->pctl = devm_pinctrl_register(&pdev->dev, &ocelot_desc, info);
|
|
if (IS_ERR(info->pctl)) {
|
|
dev_err(&pdev->dev, "Failed to register pinctrl\n");
|
|
return PTR_ERR(info->pctl);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ocelot_gpio_get(struct gpio_chip *chip, unsigned int offset)
|
|
{
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
unsigned int val;
|
|
|
|
regmap_read(info->map, OCELOT_GPIO_IN, &val);
|
|
|
|
return !!(val & BIT(offset));
|
|
}
|
|
|
|
static void ocelot_gpio_set(struct gpio_chip *chip, unsigned int offset,
|
|
int value)
|
|
{
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
|
|
if (value)
|
|
regmap_write(info->map, OCELOT_GPIO_OUT_SET, BIT(offset));
|
|
else
|
|
regmap_write(info->map, OCELOT_GPIO_OUT_CLR, BIT(offset));
|
|
}
|
|
|
|
static int ocelot_gpio_get_direction(struct gpio_chip *chip,
|
|
unsigned int offset)
|
|
{
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
unsigned int val;
|
|
|
|
regmap_read(info->map, OCELOT_GPIO_OE, &val);
|
|
|
|
return !(val & BIT(offset));
|
|
}
|
|
|
|
static int ocelot_gpio_direction_input(struct gpio_chip *chip,
|
|
unsigned int offset)
|
|
{
|
|
return pinctrl_gpio_direction_input(chip->base + offset);
|
|
}
|
|
|
|
static int ocelot_gpio_direction_output(struct gpio_chip *chip,
|
|
unsigned int offset, int value)
|
|
{
|
|
struct ocelot_pinctrl *info = gpiochip_get_data(chip);
|
|
unsigned int pin = BIT(offset);
|
|
|
|
if (value)
|
|
regmap_write(info->map, OCELOT_GPIO_OUT_SET, pin);
|
|
else
|
|
regmap_write(info->map, OCELOT_GPIO_OUT_CLR, pin);
|
|
|
|
return pinctrl_gpio_direction_output(chip->base + offset);
|
|
}
|
|
|
|
static const struct gpio_chip ocelot_gpiolib_chip = {
|
|
.request = gpiochip_generic_request,
|
|
.free = gpiochip_generic_free,
|
|
.set = ocelot_gpio_set,
|
|
.get = ocelot_gpio_get,
|
|
.get_direction = ocelot_gpio_get_direction,
|
|
.direction_input = ocelot_gpio_direction_input,
|
|
.direction_output = ocelot_gpio_direction_output,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int ocelot_gpiochip_register(struct platform_device *pdev,
|
|
struct ocelot_pinctrl *info)
|
|
{
|
|
struct gpio_chip *gc;
|
|
int ret;
|
|
|
|
info->gpio_chip = ocelot_gpiolib_chip;
|
|
|
|
gc = &info->gpio_chip;
|
|
gc->ngpio = OCELOT_PINS;
|
|
gc->parent = &pdev->dev;
|
|
gc->base = 0;
|
|
gc->of_node = info->dev->of_node;
|
|
gc->label = "ocelot-gpio";
|
|
|
|
ret = devm_gpiochip_add_data(&pdev->dev, gc, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* TODO: this can be used as an irqchip but no board is using that */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct regmap_config ocelot_pinctrl_regmap_config = {
|
|
.reg_bits = 32,
|
|
.val_bits = 32,
|
|
.reg_stride = 4,
|
|
.max_register = 0x64,
|
|
};
|
|
|
|
static const struct of_device_id ocelot_pinctrl_of_match[] = {
|
|
{ .compatible = "mscc,ocelot-pinctrl" },
|
|
{},
|
|
};
|
|
|
|
static int ocelot_pinctrl_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ocelot_pinctrl *info;
|
|
void __iomem *base;
|
|
int ret;
|
|
|
|
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
base = devm_ioremap_resource(dev,
|
|
platform_get_resource(pdev, IORESOURCE_MEM, 0));
|
|
if (IS_ERR(base)) {
|
|
dev_err(dev, "Failed to ioremap registers\n");
|
|
return PTR_ERR(base);
|
|
}
|
|
|
|
info->map = devm_regmap_init_mmio(dev, base,
|
|
&ocelot_pinctrl_regmap_config);
|
|
if (IS_ERR(info->map)) {
|
|
dev_err(dev, "Failed to create regmap\n");
|
|
return PTR_ERR(info->map);
|
|
}
|
|
dev_set_drvdata(dev, info->map);
|
|
info->dev = dev;
|
|
|
|
ret = ocelot_pinctrl_register(pdev, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = ocelot_gpiochip_register(pdev, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ocelot_pinctrl_driver = {
|
|
.driver = {
|
|
.name = "pinctrl-ocelot",
|
|
.of_match_table = of_match_ptr(ocelot_pinctrl_of_match),
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
.probe = ocelot_pinctrl_probe,
|
|
};
|
|
builtin_platform_driver(ocelot_pinctrl_driver);
|