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linux_dsm_epyc7002/drivers/pinctrl/freescale/pinctrl-imx1-core.c
Kees Cook a86854d0c5 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 16:19:22 -07:00

650 lines
17 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
//
// Core driver for the imx pin controller in imx1/21/27
//
// Copyright (C) 2013 Pengutronix
// Author: Markus Pargmann <mpa@pengutronix.de>
//
// Based on pinctrl-imx.c:
// Author: Dong Aisheng <dong.aisheng@linaro.org>
// Copyright (C) 2012 Freescale Semiconductor, Inc.
// Copyright (C) 2012 Linaro Ltd.
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/slab.h>
#include "../core.h"
#include "pinctrl-imx1.h"
struct imx1_pinctrl {
struct device *dev;
struct pinctrl_dev *pctl;
void __iomem *base;
const struct imx1_pinctrl_soc_info *info;
};
/*
* MX1 register offsets
*/
#define MX1_DDIR 0x00
#define MX1_OCR 0x04
#define MX1_ICONFA 0x0c
#define MX1_ICONFB 0x14
#define MX1_GIUS 0x20
#define MX1_GPR 0x38
#define MX1_PUEN 0x40
#define MX1_PORT_STRIDE 0x100
/*
* MUX_ID format defines
*/
#define MX1_MUX_FUNCTION(val) (BIT(0) & val)
#define MX1_MUX_GPIO(val) ((BIT(1) & val) >> 1)
#define MX1_MUX_DIR(val) ((BIT(2) & val) >> 2)
#define MX1_MUX_OCONF(val) (((BIT(4) | BIT(5)) & val) >> 4)
#define MX1_MUX_ICONFA(val) (((BIT(8) | BIT(9)) & val) >> 8)
#define MX1_MUX_ICONFB(val) (((BIT(10) | BIT(11)) & val) >> 10)
/*
* IMX1 IOMUXC manages the pins based on ports. Each port has 32 pins. IOMUX
* control register are seperated into function, output configuration, input
* configuration A, input configuration B, GPIO in use and data direction.
*
* Those controls that are represented by 1 bit have a direct mapping between
* bit position and pin id. If they are represented by 2 bit, the lower 16 pins
* are in the first register and the upper 16 pins in the second (next)
* register. pin_id is stored in bit (pin_id%16)*2 and the bit above.
*/
/*
* Calculates the register offset from a pin_id
*/
static void __iomem *imx1_mem(struct imx1_pinctrl *ipctl, unsigned int pin_id)
{
unsigned int port = pin_id / 32;
return ipctl->base + port * MX1_PORT_STRIDE;
}
/*
* Write to a register with 2 bits per pin. The function will automatically
* use the next register if the pin is managed in the second register.
*/
static void imx1_write_2bit(struct imx1_pinctrl *ipctl, unsigned int pin_id,
u32 value, u32 reg_offset)
{
void __iomem *reg = imx1_mem(ipctl, pin_id) + reg_offset;
int offset = (pin_id % 16) * 2; /* offset, regardless of register used */
int mask = ~(0x3 << offset); /* Mask for 2 bits at offset */
u32 old_val;
u32 new_val;
/* Use the next register if the pin's port pin number is >=16 */
if (pin_id % 32 >= 16)
reg += 0x04;
dev_dbg(ipctl->dev, "write: register 0x%p offset %d value 0x%x\n",
reg, offset, value);
/* Get current state of pins */
old_val = readl(reg);
old_val &= mask;
new_val = value & 0x3; /* Make sure value is really 2 bit */
new_val <<= offset;
new_val |= old_val;/* Set new state for pin_id */
writel(new_val, reg);
}
static void imx1_write_bit(struct imx1_pinctrl *ipctl, unsigned int pin_id,
u32 value, u32 reg_offset)
{
void __iomem *reg = imx1_mem(ipctl, pin_id) + reg_offset;
int offset = pin_id % 32;
int mask = ~BIT_MASK(offset);
u32 old_val;
u32 new_val;
/* Get current state of pins */
old_val = readl(reg);
old_val &= mask;
new_val = value & 0x1; /* Make sure value is really 1 bit */
new_val <<= offset;
new_val |= old_val;/* Set new state for pin_id */
writel(new_val, reg);
}
static int imx1_read_2bit(struct imx1_pinctrl *ipctl, unsigned int pin_id,
u32 reg_offset)
{
void __iomem *reg = imx1_mem(ipctl, pin_id) + reg_offset;
int offset = (pin_id % 16) * 2;
/* Use the next register if the pin's port pin number is >=16 */
if (pin_id % 32 >= 16)
reg += 0x04;
return (readl(reg) & (BIT(offset) | BIT(offset+1))) >> offset;
}
static int imx1_read_bit(struct imx1_pinctrl *ipctl, unsigned int pin_id,
u32 reg_offset)
{
void __iomem *reg = imx1_mem(ipctl, pin_id) + reg_offset;
int offset = pin_id % 32;
return !!(readl(reg) & BIT(offset));
}
static inline const struct imx1_pin_group *imx1_pinctrl_find_group_by_name(
const struct imx1_pinctrl_soc_info *info,
const char *name)
{
const struct imx1_pin_group *grp = NULL;
int i;
for (i = 0; i < info->ngroups; i++) {
if (!strcmp(info->groups[i].name, name)) {
grp = &info->groups[i];
break;
}
}
return grp;
}
static int imx1_get_groups_count(struct pinctrl_dev *pctldev)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
return info->ngroups;
}
static const char *imx1_get_group_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
return info->groups[selector].name;
}
static int imx1_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
const unsigned int **pins,
unsigned *npins)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
if (selector >= info->ngroups)
return -EINVAL;
*pins = info->groups[selector].pin_ids;
*npins = info->groups[selector].npins;
return 0;
}
static void imx1_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
unsigned offset)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
seq_printf(s, "GPIO %d, function %d, direction %d, oconf %d, iconfa %d, iconfb %d",
imx1_read_bit(ipctl, offset, MX1_GIUS),
imx1_read_bit(ipctl, offset, MX1_GPR),
imx1_read_bit(ipctl, offset, MX1_DDIR),
imx1_read_2bit(ipctl, offset, MX1_OCR),
imx1_read_2bit(ipctl, offset, MX1_ICONFA),
imx1_read_2bit(ipctl, offset, MX1_ICONFB));
}
static int imx1_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map, unsigned *num_maps)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
const struct imx1_pin_group *grp;
struct pinctrl_map *new_map;
struct device_node *parent;
int map_num = 1;
int i, j;
/*
* first find the group of this node and check if we need create
* config maps for pins
*/
grp = imx1_pinctrl_find_group_by_name(info, np->name);
if (!grp) {
dev_err(info->dev, "unable to find group for node %s\n",
np->name);
return -EINVAL;
}
for (i = 0; i < grp->npins; i++)
map_num++;
new_map = kmalloc_array(map_num, sizeof(struct pinctrl_map),
GFP_KERNEL);
if (!new_map)
return -ENOMEM;
*map = new_map;
*num_maps = map_num;
/* create mux map */
parent = of_get_parent(np);
if (!parent) {
kfree(new_map);
return -EINVAL;
}
new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
new_map[0].data.mux.function = parent->name;
new_map[0].data.mux.group = np->name;
of_node_put(parent);
/* create config map */
new_map++;
for (i = j = 0; i < grp->npins; i++) {
new_map[j].type = PIN_MAP_TYPE_CONFIGS_PIN;
new_map[j].data.configs.group_or_pin =
pin_get_name(pctldev, grp->pins[i].pin_id);
new_map[j].data.configs.configs = &grp->pins[i].config;
new_map[j].data.configs.num_configs = 1;
j++;
}
dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
(*map)->data.mux.function, (*map)->data.mux.group, map_num);
return 0;
}
static void imx1_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned num_maps)
{
kfree(map);
}
static const struct pinctrl_ops imx1_pctrl_ops = {
.get_groups_count = imx1_get_groups_count,
.get_group_name = imx1_get_group_name,
.get_group_pins = imx1_get_group_pins,
.pin_dbg_show = imx1_pin_dbg_show,
.dt_node_to_map = imx1_dt_node_to_map,
.dt_free_map = imx1_dt_free_map,
};
static int imx1_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
unsigned group)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
const struct imx1_pin *pins;
unsigned int npins;
int i;
/*
* Configure the mux mode for each pin in the group for a specific
* function.
*/
pins = info->groups[group].pins;
npins = info->groups[group].npins;
WARN_ON(!pins || !npins);
dev_dbg(ipctl->dev, "enable function %s group %s\n",
info->functions[selector].name, info->groups[group].name);
for (i = 0; i < npins; i++) {
unsigned int mux = pins[i].mux_id;
unsigned int pin_id = pins[i].pin_id;
unsigned int afunction = MX1_MUX_FUNCTION(mux);
unsigned int gpio_in_use = MX1_MUX_GPIO(mux);
unsigned int direction = MX1_MUX_DIR(mux);
unsigned int gpio_oconf = MX1_MUX_OCONF(mux);
unsigned int gpio_iconfa = MX1_MUX_ICONFA(mux);
unsigned int gpio_iconfb = MX1_MUX_ICONFB(mux);
dev_dbg(pctldev->dev, "%s, pin 0x%x, function %d, gpio %d, direction %d, oconf %d, iconfa %d, iconfb %d\n",
__func__, pin_id, afunction, gpio_in_use,
direction, gpio_oconf, gpio_iconfa,
gpio_iconfb);
imx1_write_bit(ipctl, pin_id, gpio_in_use, MX1_GIUS);
imx1_write_bit(ipctl, pin_id, direction, MX1_DDIR);
if (gpio_in_use) {
imx1_write_2bit(ipctl, pin_id, gpio_oconf, MX1_OCR);
imx1_write_2bit(ipctl, pin_id, gpio_iconfa,
MX1_ICONFA);
imx1_write_2bit(ipctl, pin_id, gpio_iconfb,
MX1_ICONFB);
} else {
imx1_write_bit(ipctl, pin_id, afunction, MX1_GPR);
}
}
return 0;
}
static int imx1_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
return info->nfunctions;
}
static const char *imx1_pmx_get_func_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
return info->functions[selector].name;
}
static int imx1_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
const char * const **groups,
unsigned * const num_groups)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
*groups = info->functions[selector].groups;
*num_groups = info->functions[selector].num_groups;
return 0;
}
static const struct pinmux_ops imx1_pmx_ops = {
.get_functions_count = imx1_pmx_get_funcs_count,
.get_function_name = imx1_pmx_get_func_name,
.get_function_groups = imx1_pmx_get_groups,
.set_mux = imx1_pmx_set,
};
static int imx1_pinconf_get(struct pinctrl_dev *pctldev,
unsigned pin_id, unsigned long *config)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
*config = imx1_read_bit(ipctl, pin_id, MX1_PUEN);
return 0;
}
static int imx1_pinconf_set(struct pinctrl_dev *pctldev,
unsigned pin_id, unsigned long *configs,
unsigned num_configs)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
int i;
for (i = 0; i != num_configs; ++i) {
imx1_write_bit(ipctl, pin_id, configs[i] & 0x01, MX1_PUEN);
dev_dbg(ipctl->dev, "pinconf set pullup pin %s\n",
pin_desc_get(pctldev, pin_id)->name);
}
return 0;
}
static void imx1_pinconf_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned pin_id)
{
unsigned long config;
imx1_pinconf_get(pctldev, pin_id, &config);
seq_printf(s, "0x%lx", config);
}
static void imx1_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned group)
{
struct imx1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
const struct imx1_pinctrl_soc_info *info = ipctl->info;
struct imx1_pin_group *grp;
unsigned long config;
const char *name;
int i, ret;
if (group > info->ngroups)
return;
seq_puts(s, "\n");
grp = &info->groups[group];
for (i = 0; i < grp->npins; i++) {
name = pin_get_name(pctldev, grp->pins[i].pin_id);
ret = imx1_pinconf_get(pctldev, grp->pins[i].pin_id, &config);
if (ret)
return;
seq_printf(s, "%s: 0x%lx", name, config);
}
}
static const struct pinconf_ops imx1_pinconf_ops = {
.pin_config_get = imx1_pinconf_get,
.pin_config_set = imx1_pinconf_set,
.pin_config_dbg_show = imx1_pinconf_dbg_show,
.pin_config_group_dbg_show = imx1_pinconf_group_dbg_show,
};
static struct pinctrl_desc imx1_pinctrl_desc = {
.pctlops = &imx1_pctrl_ops,
.pmxops = &imx1_pmx_ops,
.confops = &imx1_pinconf_ops,
.owner = THIS_MODULE,
};
static int imx1_pinctrl_parse_groups(struct device_node *np,
struct imx1_pin_group *grp,
struct imx1_pinctrl_soc_info *info,
u32 index)
{
int size;
const __be32 *list;
int i;
dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
/* Initialise group */
grp->name = np->name;
/*
* the binding format is fsl,pins = <PIN MUX_ID CONFIG>
*/
list = of_get_property(np, "fsl,pins", &size);
/* we do not check return since it's safe node passed down */
if (!size || size % 12) {
dev_notice(info->dev, "Not a valid fsl,pins property (%s)\n",
np->name);
return -EINVAL;
}
grp->npins = size / 12;
grp->pins = devm_kcalloc(info->dev,
grp->npins, sizeof(struct imx1_pin), GFP_KERNEL);
grp->pin_ids = devm_kcalloc(info->dev,
grp->npins, sizeof(unsigned int), GFP_KERNEL);
if (!grp->pins || !grp->pin_ids)
return -ENOMEM;
for (i = 0; i < grp->npins; i++) {
grp->pins[i].pin_id = be32_to_cpu(*list++);
grp->pins[i].mux_id = be32_to_cpu(*list++);
grp->pins[i].config = be32_to_cpu(*list++);
grp->pin_ids[i] = grp->pins[i].pin_id;
}
return 0;
}
static int imx1_pinctrl_parse_functions(struct device_node *np,
struct imx1_pinctrl_soc_info *info,
u32 index)
{
struct device_node *child;
struct imx1_pmx_func *func;
struct imx1_pin_group *grp;
int ret;
static u32 grp_index;
u32 i = 0;
dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
func = &info->functions[index];
/* Initialise function */
func->name = np->name;
func->num_groups = of_get_child_count(np);
if (func->num_groups == 0)
return -EINVAL;
func->groups = devm_kcalloc(info->dev,
func->num_groups, sizeof(char *), GFP_KERNEL);
if (!func->groups)
return -ENOMEM;
for_each_child_of_node(np, child) {
func->groups[i] = child->name;
grp = &info->groups[grp_index++];
ret = imx1_pinctrl_parse_groups(child, grp, info, i++);
if (ret == -ENOMEM) {
of_node_put(child);
return ret;
}
}
return 0;
}
static int imx1_pinctrl_parse_dt(struct platform_device *pdev,
struct imx1_pinctrl *pctl, struct imx1_pinctrl_soc_info *info)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *child;
int ret;
u32 nfuncs = 0;
u32 ngroups = 0;
u32 ifunc = 0;
if (!np)
return -ENODEV;
for_each_child_of_node(np, child) {
++nfuncs;
ngroups += of_get_child_count(child);
}
if (!nfuncs) {
dev_err(&pdev->dev, "No pin functions defined\n");
return -EINVAL;
}
info->nfunctions = nfuncs;
info->functions = devm_kcalloc(&pdev->dev,
nfuncs, sizeof(struct imx1_pmx_func), GFP_KERNEL);
info->ngroups = ngroups;
info->groups = devm_kcalloc(&pdev->dev,
ngroups, sizeof(struct imx1_pin_group), GFP_KERNEL);
if (!info->functions || !info->groups)
return -ENOMEM;
for_each_child_of_node(np, child) {
ret = imx1_pinctrl_parse_functions(child, info, ifunc++);
if (ret == -ENOMEM) {
of_node_put(child);
return -ENOMEM;
}
}
return 0;
}
int imx1_pinctrl_core_probe(struct platform_device *pdev,
struct imx1_pinctrl_soc_info *info)
{
struct imx1_pinctrl *ipctl;
struct resource *res;
struct pinctrl_desc *pctl_desc;
int ret;
if (!info || !info->pins || !info->npins) {
dev_err(&pdev->dev, "wrong pinctrl info\n");
return -EINVAL;
}
info->dev = &pdev->dev;
/* Create state holders etc for this driver */
ipctl = devm_kzalloc(&pdev->dev, sizeof(*ipctl), GFP_KERNEL);
if (!ipctl)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENOENT;
ipctl->base = devm_ioremap_nocache(&pdev->dev, res->start,
resource_size(res));
if (!ipctl->base)
return -ENOMEM;
pctl_desc = &imx1_pinctrl_desc;
pctl_desc->name = dev_name(&pdev->dev);
pctl_desc->pins = info->pins;
pctl_desc->npins = info->npins;
ret = imx1_pinctrl_parse_dt(pdev, ipctl, info);
if (ret) {
dev_err(&pdev->dev, "fail to probe dt properties\n");
return ret;
}
ipctl->info = info;
ipctl->dev = info->dev;
platform_set_drvdata(pdev, ipctl);
ipctl->pctl = devm_pinctrl_register(&pdev->dev, pctl_desc, ipctl);
if (IS_ERR(ipctl->pctl)) {
dev_err(&pdev->dev, "could not register IMX pinctrl driver\n");
return PTR_ERR(ipctl->pctl);
}
ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
if (ret) {
pinctrl_unregister(ipctl->pctl);
dev_err(&pdev->dev, "Failed to populate subdevices\n");
return ret;
}
dev_info(&pdev->dev, "initialized IMX pinctrl driver\n");
return 0;
}
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