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