mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
i2c: mux: pinctrl: remove platform_data
No platform (at least no upstreamed platform) has ever used this platform_data. Just drop it and simplify the code. Reviewed-by: Stephen Warren <swarren@nvidia.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Peter Rosin <peda@axentia.se>
This commit is contained in:
Peter Rosin
parent
26b1083b45
commit
c4aee3e1b0
3 changed files with 72 additions and 189 deletions
|
|
@ -76,6 +76,7 @@ config I2C_MUX_PCA954x
|
|||
config I2C_MUX_PINCTRL
|
||||
tristate "pinctrl-based I2C multiplexer"
|
||||
depends on PINCTRL
|
||||
depends on OF || COMPILE_TEST
|
||||
help
|
||||
If you say yes to this option, support will be included for an I2C
|
||||
multiplexer that uses the pinctrl subsystem, i.e. pin multiplexing.
|
||||
|
|
|
|||
|
|
@ -20,14 +20,12 @@
|
|||
#include <linux/i2c-mux.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/pinctrl/consumer.h>
|
||||
#include <linux/i2c-mux-pinctrl.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/of.h>
|
||||
#include "../../pinctrl/core.h"
|
||||
|
||||
struct i2c_mux_pinctrl {
|
||||
struct i2c_mux_pinctrl_platform_data *pdata;
|
||||
struct pinctrl *pinctrl;
|
||||
struct pinctrl_state **states;
|
||||
struct pinctrl_state *state_idle;
|
||||
|
|
@ -47,80 +45,6 @@ static int i2c_mux_pinctrl_deselect(struct i2c_mux_core *muxc, u32 chan)
|
|||
return pinctrl_select_state(mux->pinctrl, mux->state_idle);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static int i2c_mux_pinctrl_parse_dt(struct i2c_mux_pinctrl *mux,
|
||||
struct platform_device *pdev)
|
||||
{
|
||||
struct device_node *np = pdev->dev.of_node;
|
||||
int num_names, i, ret;
|
||||
struct device_node *adapter_np;
|
||||
struct i2c_adapter *adapter;
|
||||
|
||||
if (!np)
|
||||
return 0;
|
||||
|
||||
mux->pdata = devm_kzalloc(&pdev->dev, sizeof(*mux->pdata), GFP_KERNEL);
|
||||
if (!mux->pdata)
|
||||
return -ENOMEM;
|
||||
|
||||
num_names = of_property_count_strings(np, "pinctrl-names");
|
||||
if (num_names < 0) {
|
||||
dev_err(&pdev->dev, "Cannot parse pinctrl-names: %d\n",
|
||||
num_names);
|
||||
return num_names;
|
||||
}
|
||||
|
||||
mux->pdata->pinctrl_states = devm_kzalloc(&pdev->dev,
|
||||
sizeof(*mux->pdata->pinctrl_states) * num_names,
|
||||
GFP_KERNEL);
|
||||
if (!mux->pdata->pinctrl_states)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < num_names; i++) {
|
||||
ret = of_property_read_string_index(np, "pinctrl-names", i,
|
||||
&mux->pdata->pinctrl_states[mux->pdata->bus_count]);
|
||||
if (ret < 0) {
|
||||
dev_err(&pdev->dev, "Cannot parse pinctrl-names: %d\n",
|
||||
ret);
|
||||
return ret;
|
||||
}
|
||||
if (!strcmp(mux->pdata->pinctrl_states[mux->pdata->bus_count],
|
||||
"idle")) {
|
||||
if (i != num_names - 1) {
|
||||
dev_err(&pdev->dev,
|
||||
"idle state must be last\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
mux->pdata->pinctrl_state_idle = "idle";
|
||||
} else {
|
||||
mux->pdata->bus_count++;
|
||||
}
|
||||
}
|
||||
|
||||
adapter_np = of_parse_phandle(np, "i2c-parent", 0);
|
||||
if (!adapter_np) {
|
||||
dev_err(&pdev->dev, "Cannot parse i2c-parent\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
adapter = of_find_i2c_adapter_by_node(adapter_np);
|
||||
of_node_put(adapter_np);
|
||||
if (!adapter) {
|
||||
dev_err(&pdev->dev, "Cannot find parent bus\n");
|
||||
return -EPROBE_DEFER;
|
||||
}
|
||||
mux->pdata->parent_bus_num = i2c_adapter_id(adapter);
|
||||
put_device(&adapter->dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
static inline int i2c_mux_pinctrl_parse_dt(struct i2c_mux_pinctrl *mux,
|
||||
struct platform_device *pdev)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static struct i2c_adapter *i2c_mux_pinctrl_root_adapter(
|
||||
struct pinctrl_state *state)
|
||||
{
|
||||
|
|
@ -141,110 +65,109 @@ static struct i2c_adapter *i2c_mux_pinctrl_root_adapter(
|
|||
return root;
|
||||
}
|
||||
|
||||
static struct i2c_adapter *i2c_mux_pinctrl_parent_adapter(struct device *dev)
|
||||
{
|
||||
struct device_node *np = dev->of_node;
|
||||
struct device_node *parent_np;
|
||||
struct i2c_adapter *parent;
|
||||
|
||||
parent_np = of_parse_phandle(np, "i2c-parent", 0);
|
||||
if (!parent_np) {
|
||||
dev_err(dev, "Cannot parse i2c-parent\n");
|
||||
return ERR_PTR(-ENODEV);
|
||||
}
|
||||
parent = of_find_i2c_adapter_by_node(parent_np);
|
||||
of_node_put(parent_np);
|
||||
if (!parent)
|
||||
return ERR_PTR(-EPROBE_DEFER);
|
||||
|
||||
return parent;
|
||||
}
|
||||
|
||||
static int i2c_mux_pinctrl_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct device_node *np = dev->of_node;
|
||||
struct i2c_mux_core *muxc;
|
||||
struct i2c_mux_pinctrl *mux;
|
||||
struct i2c_adapter *parent;
|
||||
struct i2c_adapter *root;
|
||||
int i, ret;
|
||||
int num_names, i, ret;
|
||||
const char *name;
|
||||
|
||||
mux = devm_kzalloc(&pdev->dev, sizeof(*mux), GFP_KERNEL);
|
||||
if (!mux) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
num_names = of_property_count_strings(np, "pinctrl-names");
|
||||
if (num_names < 0) {
|
||||
dev_err(dev, "Cannot parse pinctrl-names: %d\n",
|
||||
num_names);
|
||||
return num_names;
|
||||
}
|
||||
|
||||
mux->pdata = dev_get_platdata(&pdev->dev);
|
||||
if (!mux->pdata) {
|
||||
ret = i2c_mux_pinctrl_parse_dt(mux, pdev);
|
||||
if (ret < 0)
|
||||
goto err;
|
||||
}
|
||||
if (!mux->pdata) {
|
||||
dev_err(&pdev->dev, "Missing platform data\n");
|
||||
ret = -ENODEV;
|
||||
goto err;
|
||||
}
|
||||
parent = i2c_mux_pinctrl_parent_adapter(dev);
|
||||
if (IS_ERR(parent))
|
||||
return PTR_ERR(parent);
|
||||
|
||||
mux->states = devm_kzalloc(&pdev->dev,
|
||||
sizeof(*mux->states) * mux->pdata->bus_count,
|
||||
GFP_KERNEL);
|
||||
if (!mux->states) {
|
||||
dev_err(&pdev->dev, "Cannot allocate states\n");
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
muxc = i2c_mux_alloc(NULL, &pdev->dev, mux->pdata->bus_count, 0, 0,
|
||||
i2c_mux_pinctrl_select, NULL);
|
||||
muxc = i2c_mux_alloc(parent, dev, num_names,
|
||||
sizeof(*mux) + num_names * sizeof(*mux->states),
|
||||
0, i2c_mux_pinctrl_select, NULL);
|
||||
if (!muxc) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
goto err_put_parent;
|
||||
}
|
||||
muxc->priv = mux;
|
||||
mux = i2c_mux_priv(muxc);
|
||||
mux->states = (struct pinctrl_state **)(mux + 1);
|
||||
|
||||
platform_set_drvdata(pdev, muxc);
|
||||
|
||||
mux->pinctrl = devm_pinctrl_get(&pdev->dev);
|
||||
mux->pinctrl = devm_pinctrl_get(dev);
|
||||
if (IS_ERR(mux->pinctrl)) {
|
||||
ret = PTR_ERR(mux->pinctrl);
|
||||
dev_err(&pdev->dev, "Cannot get pinctrl: %d\n", ret);
|
||||
goto err;
|
||||
dev_err(dev, "Cannot get pinctrl: %d\n", ret);
|
||||
goto err_put_parent;
|
||||
}
|
||||
for (i = 0; i < mux->pdata->bus_count; i++) {
|
||||
mux->states[i] = pinctrl_lookup_state(mux->pinctrl,
|
||||
mux->pdata->pinctrl_states[i]);
|
||||
|
||||
for (i = 0; i < num_names; i++) {
|
||||
ret = of_property_read_string_index(np, "pinctrl-names", i,
|
||||
&name);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "Cannot parse pinctrl-names: %d\n", ret);
|
||||
goto err_put_parent;
|
||||
}
|
||||
|
||||
mux->states[i] = pinctrl_lookup_state(mux->pinctrl, name);
|
||||
if (IS_ERR(mux->states[i])) {
|
||||
ret = PTR_ERR(mux->states[i]);
|
||||
dev_err(&pdev->dev,
|
||||
"Cannot look up pinctrl state %s: %d\n",
|
||||
mux->pdata->pinctrl_states[i], ret);
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
if (mux->pdata->pinctrl_state_idle) {
|
||||
mux->state_idle = pinctrl_lookup_state(mux->pinctrl,
|
||||
mux->pdata->pinctrl_state_idle);
|
||||
if (IS_ERR(mux->state_idle)) {
|
||||
ret = PTR_ERR(mux->state_idle);
|
||||
dev_err(&pdev->dev,
|
||||
"Cannot look up pinctrl state %s: %d\n",
|
||||
mux->pdata->pinctrl_state_idle, ret);
|
||||
goto err;
|
||||
dev_err(dev, "Cannot look up pinctrl state %s: %d\n",
|
||||
name, ret);
|
||||
goto err_put_parent;
|
||||
}
|
||||
|
||||
if (strcmp(name, "idle"))
|
||||
continue;
|
||||
|
||||
if (i != num_names - 1) {
|
||||
dev_err(dev, "idle state must be last\n");
|
||||
ret = -EINVAL;
|
||||
goto err_put_parent;
|
||||
}
|
||||
mux->state_idle = mux->states[i];
|
||||
muxc->deselect = i2c_mux_pinctrl_deselect;
|
||||
}
|
||||
|
||||
muxc->parent = i2c_get_adapter(mux->pdata->parent_bus_num);
|
||||
if (!muxc->parent) {
|
||||
dev_err(&pdev->dev, "Parent adapter (%d) not found\n",
|
||||
mux->pdata->parent_bus_num);
|
||||
ret = -EPROBE_DEFER;
|
||||
goto err;
|
||||
}
|
||||
|
||||
root = i2c_root_adapter(&muxc->parent->dev);
|
||||
|
||||
muxc->mux_locked = true;
|
||||
for (i = 0; i < mux->pdata->bus_count; i++) {
|
||||
for (i = 0; i < num_names; i++) {
|
||||
if (root != i2c_mux_pinctrl_root_adapter(mux->states[i])) {
|
||||
muxc->mux_locked = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (muxc->mux_locked && mux->pdata->pinctrl_state_idle &&
|
||||
root != i2c_mux_pinctrl_root_adapter(mux->state_idle))
|
||||
muxc->mux_locked = false;
|
||||
|
||||
if (muxc->mux_locked)
|
||||
dev_info(&pdev->dev, "mux-locked i2c mux\n");
|
||||
dev_info(dev, "mux-locked i2c mux\n");
|
||||
|
||||
for (i = 0; i < mux->pdata->bus_count; i++) {
|
||||
u32 bus = mux->pdata->base_bus_num ?
|
||||
(mux->pdata->base_bus_num + i) : 0;
|
||||
|
||||
ret = i2c_mux_add_adapter(muxc, bus, i, 0);
|
||||
/* Do not add any adapter for the idle state (if it's there at all). */
|
||||
for (i = 0; i < num_names - !!mux->state_idle; i++) {
|
||||
ret = i2c_mux_add_adapter(muxc, 0, i, 0);
|
||||
if (ret)
|
||||
goto err_del_adapter;
|
||||
}
|
||||
|
|
@ -253,8 +176,9 @@ static int i2c_mux_pinctrl_probe(struct platform_device *pdev)
|
|||
|
||||
err_del_adapter:
|
||||
i2c_mux_del_adapters(muxc);
|
||||
err_put_parent:
|
||||
i2c_put_adapter(muxc->parent);
|
||||
err:
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
@ -264,16 +188,15 @@ static int i2c_mux_pinctrl_remove(struct platform_device *pdev)
|
|||
|
||||
i2c_mux_del_adapters(muxc);
|
||||
i2c_put_adapter(muxc->parent);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static const struct of_device_id i2c_mux_pinctrl_of_match[] = {
|
||||
{ .compatible = "i2c-mux-pinctrl", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, i2c_mux_pinctrl_of_match);
|
||||
#endif
|
||||
|
||||
static struct platform_driver i2c_mux_pinctrl_driver = {
|
||||
.driver = {
|
||||
|
|
|
|||
|
|
@ -1,41 +0,0 @@
|
|||
/*
|
||||
* i2c-mux-pinctrl platform data
|
||||
*
|
||||
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_I2C_MUX_PINCTRL_H
|
||||
#define _LINUX_I2C_MUX_PINCTRL_H
|
||||
|
||||
/**
|
||||
* struct i2c_mux_pinctrl_platform_data - Platform data for i2c-mux-pinctrl
|
||||
* @parent_bus_num: Parent I2C bus number
|
||||
* @base_bus_num: Base I2C bus number for the child busses. 0 for dynamic.
|
||||
* @bus_count: Number of child busses. Also the number of elements in
|
||||
* @pinctrl_states
|
||||
* @pinctrl_states: The names of the pinctrl state to select for each child bus
|
||||
* @pinctrl_state_idle: The pinctrl state to select when no child bus is being
|
||||
* accessed. If NULL, the most recently used pinctrl state will be left
|
||||
* selected.
|
||||
*/
|
||||
struct i2c_mux_pinctrl_platform_data {
|
||||
int parent_bus_num;
|
||||
int base_bus_num;
|
||||
int bus_count;
|
||||
const char **pinctrl_states;
|
||||
const char *pinctrl_state_idle;
|
||||
};
|
||||
|
||||
#endif
|
||||
Loading…
Reference in a new issue