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Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 

Pull i2c subsystem fixes from Jean Delvare.

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  i2c-core: Fix for lockdep validator
  i2c-designware: Fix build error if CONFIG_I2C_DESIGNWARE_PLATFORM=y && CONFIG_I2C_DESIGNWARE_PCI=y
  i2c-i801: Add Device IDs for Intel Lynx Point-LP PCH
This commit is contained in:
Linus Torvalds 2012-09-11 01:13:59 +08:00
parent 5d67f2e864 390946b172
commit 6562271ae4
6 changed files with 44 additions and 4 deletions
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1
Documentation/i2c/busses/i2c-i801
View File

@ -21,6 +21,7 @@ Supported adapters:
* Intel DH89xxCC (PCH)
* Intel Panther Point (PCH)
* Intel Lynx Point (PCH)
* Intel Lynx Point-LP (PCH)
Datasheets: Publicly available at the Intel website
On Intel Patsburg and later chipsets, both the normal host SMBus controller

6
drivers/i2c/busses/Kconfig
View File

@ -104,6 +104,7 @@ config I2C_I801
DH89xxCC (PCH)
Panther Point (PCH)
Lynx Point (PCH)
Lynx Point-LP (PCH)
This driver can also be built as a module. If so, the module
will be called i2c-i801.
@ -354,9 +355,13 @@ config I2C_DAVINCI
devices such as DaVinci NIC.
For details please see http://www.ti.com/davinci
config I2C_DESIGNWARE_CORE
tristate
config I2C_DESIGNWARE_PLATFORM
tristate "Synopsys DesignWare Platform"
depends on HAVE_CLK
select I2C_DESIGNWARE_CORE
help
If you say yes to this option, support will be included for the
Synopsys DesignWare I2C adapter. Only master mode is supported.
@ -367,6 +372,7 @@ config I2C_DESIGNWARE_PLATFORM
config I2C_DESIGNWARE_PCI
tristate "Synopsys DesignWare PCI"
depends on PCI
select I2C_DESIGNWARE_CORE
help
If you say yes to this option, support will be included for the
Synopsys DesignWare I2C adapter. Only master mode is supported.

5
drivers/i2c/busses/Makefile
View File

@ -33,10 +33,11 @@ obj-$(CONFIG_I2C_AU1550) += i2c-au1550.o
obj-$(CONFIG_I2C_BLACKFIN_TWI) += i2c-bfin-twi.o
obj-$(CONFIG_I2C_CPM) += i2c-cpm.o
obj-$(CONFIG_I2C_DAVINCI) += i2c-davinci.o
obj-$(CONFIG_I2C_DESIGNWARE_CORE) += i2c-designware-core.o
obj-$(CONFIG_I2C_DESIGNWARE_PLATFORM) += i2c-designware-platform.o
i2c-designware-platform-objs := i2c-designware-platdrv.o i2c-designware-core.o
i2c-designware-platform-objs := i2c-designware-platdrv.o
obj-$(CONFIG_I2C_DESIGNWARE_PCI) += i2c-designware-pci.o
i2c-designware-pci-objs := i2c-designware-pcidrv.o i2c-designware-core.o
i2c-designware-pci-objs := i2c-designware-pcidrv.o
obj-$(CONFIG_I2C_EG20T) += i2c-eg20t.o
obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o
obj-$(CONFIG_I2C_HIGHLANDER) += i2c-highlander.o

11
drivers/i2c/busses/i2c-designware-core.c
View File

@ -25,6 +25,7 @@
* ----------------------------------------------------------------------------
*
*/
#include <linux/export.h>
#include <linux/clk.h>
#include <linux/errno.h>
#include <linux/err.h>
@ -316,6 +317,7 @@ int i2c_dw_init(struct dw_i2c_dev *dev)
dw_writel(dev, dev->master_cfg , DW_IC_CON);
return 0;
}
EXPORT_SYMBOL_GPL(i2c_dw_init);
/*
* Waiting for bus not busy
@ -568,12 +570,14 @@ done:
return ret;
}
EXPORT_SYMBOL_GPL(i2c_dw_xfer);
u32 i2c_dw_func(struct i2c_adapter *adap)
{
struct dw_i2c_dev *dev = i2c_get_adapdata(adap);
return dev->functionality;
}
EXPORT_SYMBOL_GPL(i2c_dw_func);
static u32 i2c_dw_read_clear_intrbits(struct dw_i2c_dev *dev)
{
@ -678,17 +682,20 @@ tx_aborted:
return IRQ_HANDLED;
}
EXPORT_SYMBOL_GPL(i2c_dw_isr);
void i2c_dw_enable(struct dw_i2c_dev *dev)
{
/* Enable the adapter */
dw_writel(dev, 1, DW_IC_ENABLE);
}
EXPORT_SYMBOL_GPL(i2c_dw_enable);
u32 i2c_dw_is_enabled(struct dw_i2c_dev *dev)
{
return dw_readl(dev, DW_IC_ENABLE);
}
EXPORT_SYMBOL_GPL(i2c_dw_is_enabled);
void i2c_dw_disable(struct dw_i2c_dev *dev)
{
@ -699,18 +706,22 @@ void i2c_dw_disable(struct dw_i2c_dev *dev)
dw_writel(dev, 0, DW_IC_INTR_MASK);
dw_readl(dev, DW_IC_CLR_INTR);
}
EXPORT_SYMBOL_GPL(i2c_dw_disable);
void i2c_dw_clear_int(struct dw_i2c_dev *dev)
{
dw_readl(dev, DW_IC_CLR_INTR);
}
EXPORT_SYMBOL_GPL(i2c_dw_clear_int);
void i2c_dw_disable_int(struct dw_i2c_dev *dev)
{
dw_writel(dev, 0, DW_IC_INTR_MASK);
}
EXPORT_SYMBOL_GPL(i2c_dw_disable_int);
u32 i2c_dw_read_comp_param(struct dw_i2c_dev *dev)
{
return dw_readl(dev, DW_IC_COMP_PARAM_1);
}
EXPORT_SYMBOL_GPL(i2c_dw_read_comp_param);

3
drivers/i2c/busses/i2c-i801.c
View File

@ -52,6 +52,7 @@
DH89xxCC (PCH) 0x2330 32 hard yes yes yes
Panther Point (PCH) 0x1e22 32 hard yes yes yes
Lynx Point (PCH) 0x8c22 32 hard yes yes yes
Lynx Point-LP (PCH) 0x9c22 32 hard yes yes yes
Features supported by this driver:
Software PEC no
@ -155,6 +156,7 @@
#define PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS 0x2330
#define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS 0x3b30
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS 0x8c22
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS 0x9c22
struct i801_priv {
struct i2c_adapter adapter;
@ -771,6 +773,7 @@ static DEFINE_PCI_DEVICE_TABLE(i801_ids) = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS) },
{ 0, }
};

22
drivers/i2c/i2c-core.c
View File

@ -636,6 +636,22 @@ static void i2c_adapter_dev_release(struct device *dev)
complete(&adap->dev_released);
}
/*
* This function is only needed for mutex_lock_nested, so it is never
* called unless locking correctness checking is enabled. Thus we
* make it inline to avoid a compiler warning. That's what gcc ends up
* doing anyway.
*/
static inline unsigned int i2c_adapter_depth(struct i2c_adapter *adapter)
{
unsigned int depth = 0;
while ((adapter = i2c_parent_is_i2c_adapter(adapter)))
depth++;
return depth;
}
/*
* Let users instantiate I2C devices through sysfs. This can be used when
* platform initialization code doesn't contain the proper data for
@ -726,7 +742,8 @@ i2c_sysfs_delete_device(struct device *dev, struct device_attribute *attr,
/* Make sure the device was added through sysfs */
res = -ENOENT;
mutex_lock(&adap->userspace_clients_lock);
mutex_lock_nested(&adap->userspace_clients_lock,
i2c_adapter_depth(adap));
list_for_each_entry_safe(client, next, &adap->userspace_clients,
detected) {
if (client->addr == addr) {
@ -1073,7 +1090,8 @@ int i2c_del_adapter(struct i2c_adapter *adap)
return res;
/* Remove devices instantiated from sysfs */
mutex_lock(&adap->userspace_clients_lock);
mutex_lock_nested(&adap->userspace_clients_lock,
i2c_adapter_depth(adap));
list_for_each_entry_safe(client, next, &adap->userspace_clients,
detected) {
dev_dbg(&adap->dev, "Removing %s at 0x%x\n", client->name,