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Merge branch 'i2c/for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Browse source 
Pull i2c updates from Wolfram Sang:

 - Peter Rosin did some major rework on the locking of i2c muxes by
   seperating parent-locked muxes and mux-locked muxes.

   This avoids deadlocks/workarounds when the mux itself needs i2c
   commands for muxing.  And as a side-effect, other workarounds in the
   media layer could be eliminated.  Also, Peter stepped up as the i2c
   mux maintainer and will keep an eye on these changes.

 - major updates to the octeon driver

 - add a helper to the core to generate the address+rw_bit octal and
   make drivers use it

 - quite a bunch of driver updates

* 'i2c/for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (84 commits)
  i2c: rcar: add DMA support
  i2c: st: Implement bus clear
  i2c: only check scl functions when using generic recovery
  i2c: algo-bit: declare i2c_bit_quirk_no_clk_stretch as static
  i2c: tegra: disable clock before returning error
  [media] rtl2832: regmap is aware of lockdep, drop local locking hack
  [media] rtl2832_sdr: get rid of empty regmap wrappers
  [media] rtl2832: change the i2c gate to be mux-locked
  [media] si2168: change the i2c gate to be mux-locked
  iio: imu: inv_mpu6050: change the i2c gate to be mux-locked
  i2c: mux: document i2c muxes and elaborate on parent-/mux-locked muxes
  i2c: mux: relax locking of the top i2c adapter during mux-locked muxing
  i2c: muxes always lock the parent adapter
  i2c: allow adapter drivers to override the adapter locking
  i2c: uniphier: add "\n" at the end of error log
  i2c: mv64xxx: remove CONFIG_HAVE_CLK conditionals
  i2c: mv64xxx: use clk_{prepare_enable,disable_unprepare}
  i2c: mv64xxx: handle probe deferral for the clock
  i2c: mv64xxx: enable the driver on ARCH_MVEBU
  i2c: octeon: Add workaround for broken irqs on CN3860
  ...
This commit is contained in:
Linus Torvalds 2016-05-19 17:48:12 -07:00
commit 78975f23cb
67 changed files with 2648 additions and 1445 deletions
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37
drivers/of/unittest.c
View file

@ -1692,13 +1692,7 @@ static struct i2c_driver unittest_i2c_dev_driver = {
#if IS_BUILTIN(CONFIG_I2C_MUX)
struct unittest_i2c_mux_data {
int nchans;
struct i2c_adapter *adap[];
};
static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap,
void *client, u32 chan)
static int unittest_i2c_mux_select_chan(struct i2c_mux_core *muxc, u32 chan)
{
return 0;
}
@ -1706,11 +1700,11 @@ static int unittest_i2c_mux_select_chan(struct i2c_adapter *adap,
static int unittest_i2c_mux_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret, i, nchans, size;
int ret, i, nchans;
struct device *dev = &client->dev;
struct i2c_adapter *adap = to_i2c_adapter(dev->parent);
struct device_node *np = client->dev.of_node, *child;
struct unittest_i2c_mux_data *stm;
struct i2c_mux_core *muxc;
u32 reg, max_reg;
dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
@ -1734,25 +1728,20 @@ static int unittest_i2c_mux_probe(struct i2c_client *client,
return -EINVAL;
}
size = offsetof(struct unittest_i2c_mux_data, adap[nchans]);
stm = devm_kzalloc(dev, size, GFP_KERNEL);
if (!stm) {
dev_err(dev, "Out of memory\n");
muxc = i2c_mux_alloc(adap, dev, nchans, 0, 0,
unittest_i2c_mux_select_chan, NULL);
if (!muxc)
return -ENOMEM;
}
stm->nchans = nchans;
for (i = 0; i < nchans; i++) {
stm->adap[i] = i2c_add_mux_adapter(adap, dev, client,
0, i, 0, unittest_i2c_mux_select_chan, NULL);
if (!stm->adap[i]) {
ret = i2c_mux_add_adapter(muxc, 0, i, 0);
if (ret) {
dev_err(dev, "Failed to register mux #%d\n", i);
for (i--; i >= 0; i--)
i2c_del_mux_adapter(stm->adap[i]);
i2c_mux_del_adapters(muxc);
return -ENODEV;
}
}
i2c_set_clientdata(client, stm);
i2c_set_clientdata(client, muxc);
return 0;
};
@ -1761,12 +1750,10 @@ static int unittest_i2c_mux_remove(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *np = client->dev.of_node;
struct unittest_i2c_mux_data *stm = i2c_get_clientdata(client);
int i;
struct i2c_mux_core *muxc = i2c_get_clientdata(client);
dev_dbg(dev, "%s for node @%s\n", __func__, np->full_name);
for (i = stm->nchans - 1; i >= 0; i--)
i2c_del_mux_adapter(stm->adap[i]);
i2c_mux_del_adapters(muxc);
return 0;
}