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i2c: i2c-mux-reg: convert to use an explicit i2c mux core

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Allocate an explicit i2c mux core to handle parent and child adapters
etc. Update the select/deselect ops to be in terms of the i2c mux core
instead of the child adapter.

Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Peter Rosin 2016-04-20 08:40:27 +02:00 committed by Wolfram Sang
parent 7fcac98071
commit 193304aef8
1 changed files with 25 additions and 44 deletions
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69
drivers/i2c/muxes/i2c-mux-reg.c
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@ -21,8 +21,6 @@
#include <linux/slab.h>
struct regmux {
struct i2c_adapter *parent;
struct i2c_adapter **adap; /* child busses */
struct i2c_mux_reg_platform_data data;
};
@ -64,18 +62,16 @@ static int i2c_mux_reg_set(const struct regmux *mux, unsigned int chan_id)
return 0;
}
static int i2c_mux_reg_select(struct i2c_adapter *adap, void *data,
unsigned int chan)
static int i2c_mux_reg_select(struct i2c_mux_core *muxc, u32 chan)
{
struct regmux *mux = data;
struct regmux *mux = i2c_mux_priv(muxc);
return i2c_mux_reg_set(mux, chan);
}
static int i2c_mux_reg_deselect(struct i2c_adapter *adap, void *data,
unsigned int chan)
static int i2c_mux_reg_deselect(struct i2c_mux_core *muxc, u32 chan)
{
struct regmux *mux = data;
struct regmux *mux = i2c_mux_priv(muxc);
if (mux->data.idle_in_use)
return i2c_mux_reg_set(mux, mux->data.idle);
@ -85,7 +81,7 @@ static int i2c_mux_reg_deselect(struct i2c_adapter *adap, void *data,
#ifdef CONFIG_OF
static int i2c_mux_reg_probe_dt(struct regmux *mux,
struct platform_device *pdev)
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device_node *adapter_np, *child;
@ -107,7 +103,6 @@ static int i2c_mux_reg_probe_dt(struct regmux *mux,
if (!adapter)
return -EPROBE_DEFER;
mux->parent = adapter;
mux->data.parent = i2c_adapter_id(adapter);
put_device(&adapter->dev);
@ -161,7 +156,7 @@ static int i2c_mux_reg_probe_dt(struct regmux *mux,
}
#else
static int i2c_mux_reg_probe_dt(struct regmux *mux,
struct platform_device *pdev)
struct platform_device *pdev)
{
return 0;
}
@ -169,10 +164,10 @@ static int i2c_mux_reg_probe_dt(struct regmux *mux,
static int i2c_mux_reg_probe(struct platform_device *pdev)
{
struct i2c_mux_core *muxc;
struct regmux *mux;
struct i2c_adapter *parent;
struct resource *res;
int (*deselect)(struct i2c_adapter *, void *, u32);
unsigned int class;
int i, ret, nr;
@ -180,17 +175,9 @@ static int i2c_mux_reg_probe(struct platform_device *pdev)
if (!mux)
return -ENOMEM;
platform_set_drvdata(pdev, mux);
if (dev_get_platdata(&pdev->dev)) {
memcpy(&mux->data, dev_get_platdata(&pdev->dev),
sizeof(mux->data));
parent = i2c_get_adapter(mux->data.parent);
if (!parent)
return -EPROBE_DEFER;
mux->parent = parent;
} else {
ret = i2c_mux_reg_probe_dt(mux, pdev);
if (ret < 0) {
@ -199,6 +186,10 @@ static int i2c_mux_reg_probe(struct platform_device *pdev)
}
}
parent = i2c_get_adapter(mux->data.parent);
if (!parent)
return -EPROBE_DEFER;
if (!mux->data.reg) {
dev_info(&pdev->dev,
"Register not set, using platform resource\n");
@ -215,55 +206,45 @@ static int i2c_mux_reg_probe(struct platform_device *pdev)
return -EINVAL;
}
mux->adap = devm_kzalloc(&pdev->dev,
sizeof(*mux->adap) * mux->data.n_values,
GFP_KERNEL);
if (!mux->adap) {
dev_err(&pdev->dev, "Cannot allocate i2c_adapter structure");
muxc = i2c_mux_alloc(parent, &pdev->dev, mux->data.n_values, 0, 0,
i2c_mux_reg_select, NULL);
if (!muxc)
return -ENOMEM;
}
muxc->priv = mux;
platform_set_drvdata(pdev, muxc);
if (mux->data.idle_in_use)
deselect = i2c_mux_reg_deselect;
else
deselect = NULL;
muxc->deselect = i2c_mux_reg_deselect;
for (i = 0; i < mux->data.n_values; i++) {
nr = mux->data.base_nr ? (mux->data.base_nr + i) : 0;
class = mux->data.classes ? mux->data.classes[i] : 0;
mux->adap[i] = i2c_add_mux_adapter(mux->parent, &pdev->dev, mux,
nr, mux->data.values[i],
class, i2c_mux_reg_select,
deselect);
if (!mux->adap[i]) {
ret = -ENODEV;
ret = i2c_mux_add_adapter(muxc, nr, mux->data.values[i], class);
if (ret) {
dev_err(&pdev->dev, "Failed to add adapter %d\n", i);
goto add_adapter_failed;
}
}
dev_dbg(&pdev->dev, "%d port mux on %s adapter\n",
mux->data.n_values, mux->parent->name);
mux->data.n_values, muxc->parent->name);
return 0;
add_adapter_failed:
for (; i > 0; i--)
i2c_del_mux_adapter(mux->adap[i - 1]);
i2c_mux_del_adapters(muxc);
return ret;
}
static int i2c_mux_reg_remove(struct platform_device *pdev)
{
struct regmux *mux = platform_get_drvdata(pdev);
int i;
struct i2c_mux_core *muxc = platform_get_drvdata(pdev);
for (i = 0; i < mux->data.n_values; i++)
i2c_del_mux_adapter(mux->adap[i]);
i2c_put_adapter(mux->parent);
i2c_mux_del_adapters(muxc);
i2c_put_adapter(muxc->parent);
return 0;
}