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Message-ID: <1461165484-2314-8-git-send-email-peda@axentia.se>
Date: Wed, 20 Apr 2016 17:17:47 +0200
From: Peter Rosin <peda@...ntia.se>
To: <linux-kernel@...r.kernel.org>
CC: Peter Rosin <peda@...ntia.se>, Wolfram Sang <wsa@...-dreams.de>,
Jonathan Corbet <corbet@....net>,
Peter Korsgaard <peter.korsgaard@...co.com>,
Guenter Roeck <linux@...ck-us.net>,
Jonathan Cameron <jic23@...nel.org>,
Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald <pmeerw@...erw.net>,
Antti Palosaari <crope@....fi>,
Mauro Carvalho Chehab <mchehab@....samsung.com>,
Rob Herring <robh+dt@...nel.org>,
Frank Rowand <frowand.list@...il.com>,
Grant Likely <grant.likely@...aro.org>,
Andrew Morton <akpm@...ux-foundation.org>,
"David S. Miller" <davem@...emloft.net>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Kalle Valo <kvalo@...eaurora.org>,
Jiri Slaby <jslaby@...e.com>,
Daniel Baluta <daniel.baluta@...el.com>,
Lucas De Marchi <lucas.demarchi@...el.com>,
Adriana Reus <adriana.reus@...el.com>,
Matt Ranostay <matt.ranostay@...el.com>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
Hans Verkuil <hans.verkuil@...co.com>,
Terry Heo <terryheo@...gle.com>, Arnd Bergmann <arnd@...db.de>,
Tommi Rantala <tt.rantala@...il.com>,
Crestez Dan Leonard <leonard.crestez@...el.com>,
<linux-i2c@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<linux-iio@...r.kernel.org>, <linux-media@...r.kernel.org>,
<devicetree@...r.kernel.org>, Peter Rosin <peda@...ator.liu.se>
Subject: [PATCH v7 07/24] i2c: i2c-mux-reg: convert to use an explicit i2c mux core
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@...ntia.se>
---
drivers/i2c/muxes/i2c-mux-reg.c | 69 +++++++++++++++--------------------------
1 file changed, 25 insertions(+), 44 deletions(-)
diff --git a/drivers/i2c/muxes/i2c-mux-reg.c b/drivers/i2c/muxes/i2c-mux-reg.c
index 5fbd5bd0878f..6773cadf7c9f 100644
--- a/drivers/i2c/muxes/i2c-mux-reg.c
+++ b/drivers/i2c/muxes/i2c-mux-reg.c
@@ -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;
-
- for (i = 0; i < mux->data.n_values; i++)
- i2c_del_mux_adapter(mux->adap[i]);
+ struct i2c_mux_core *muxc = platform_get_drvdata(pdev);
- i2c_put_adapter(mux->parent);
+ i2c_mux_del_adapters(muxc);
+ i2c_put_adapter(muxc->parent);
return 0;
}
--
2.1.4
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