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

Browse Source 
Pull i2c fixes from Wolfram Sang:
 "i2c driver bugfixes (s3c2410, slave-eeprom, sh_mobile), size
  regression "bugfix" (i2c slave), documentation bugfix (st).

  Also, one documentation update (da9063), so some devicetrees can now
  be verified"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: sh_mobile: terminate DMA reads properly
  i2c: Only include slave support if selected
  i2c: s3c2410: fix ABBA deadlock by keeping clock prepared
  i2c: slave-eeprom: fix boundary check when using sysfs
  i2c: st: Rename clock reference to something that exists
  DT: i2c: Add devices handled by the da9063 MFD driver
This commit is contained in:
Linus Torvalds 2015-01-31 10:34:25 -08:00
commit 788807d7ca
8 changed files with 41 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/i2c/i2c-st.txt
View File

@ -31,7 +31,7 @@ i2c0: i2c@fed40000 {
compatible = "st,comms-ssc4-i2c";
reg = <0xfed40000 0x110>;
interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&CLK_S_ICN_REG_0>;
clocks = <&clk_s_a0_ls CLK_ICN_REG>;
clock-names = "ssc";
clock-frequency = <400000>;
pinctrl-names = "default";

1
Documentation/devicetree/bindings/i2c/trivial-devices.txt
View File

@ -47,6 +47,7 @@ dallas,ds3232 Extremely Accurate I²C RTC with Integrated Crystal and SRAM
dallas,ds4510 CPU Supervisor with Nonvolatile Memory and Programmable I/O
dallas,ds75 Digital Thermometer and Thermostat
dlg,da9053 DA9053: flexible system level PMIC with multicore support
dlg,da9063 DA9063: system PMIC for quad-core application processors
epson,rx8025 High-Stability. I2C-Bus INTERFACE REAL TIME CLOCK MODULE
epson,rx8581 I2C-BUS INTERFACE REAL TIME CLOCK MODULE
fsl,mag3110 MAG3110: Xtrinsic High Accuracy, 3D Magnetometer

1
drivers/i2c/busses/Kconfig
View File

@ -881,6 +881,7 @@ config I2C_XLR
config I2C_RCAR
tristate "Renesas R-Car I2C Controller"
depends on ARCH_SHMOBILE || COMPILE_TEST
select I2C_SLAVE
help
If you say yes to this option, support will be included for the
R-Car I2C controller.

23
drivers/i2c/busses/i2c-s3c2410.c
View File

@ -785,14 +785,16 @@ static int s3c24xx_i2c_xfer(struct i2c_adapter *adap,
int ret;
pm_runtime_get_sync(&adap->dev);
clk_prepare_enable(i2c->clk);
ret = clk_enable(i2c->clk);
if (ret)
return ret;
for (retry = 0; retry < adap->retries; retry++) {
ret = s3c24xx_i2c_doxfer(i2c, msgs, num);
if (ret != -EAGAIN) {
clk_disable_unprepare(i2c->clk);
clk_disable(i2c->clk);
pm_runtime_put(&adap->dev);
return ret;
}
@ -802,7 +804,7 @@ static int s3c24xx_i2c_xfer(struct i2c_adapter *adap,
udelay(100);
}
clk_disable_unprepare(i2c->clk);
clk_disable(i2c->clk);
pm_runtime_put(&adap->dev);
return -EREMOTEIO;
}
@ -1197,7 +1199,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
clk_prepare_enable(i2c->clk);
ret = s3c24xx_i2c_init(i2c);
clk_disable_unprepare(i2c->clk);
clk_disable(i2c->clk);
if (ret != 0) {
dev_err(&pdev->dev, "I2C controller init failed\n");
return ret;
@ -1210,6 +1212,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
i2c->irq = ret = platform_get_irq(pdev, 0);
if (ret <= 0) {
dev_err(&pdev->dev, "cannot find IRQ\n");
clk_unprepare(i2c->clk);
return ret;
}
@ -1218,6 +1221,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
if (ret != 0) {
dev_err(&pdev->dev, "cannot claim IRQ %d\n", i2c->irq);
clk_unprepare(i2c->clk);
return ret;
}
}
@ -1225,6 +1229,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
ret = s3c24xx_i2c_register_cpufreq(i2c);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register cpufreq notifier\n");
clk_unprepare(i2c->clk);
return ret;
}
@ -1241,6 +1246,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
if (ret < 0) {
dev_err(&pdev->dev, "failed to add bus to i2c core\n");
s3c24xx_i2c_deregister_cpufreq(i2c);
clk_unprepare(i2c->clk);
return ret;
}
@ -1262,6 +1268,8 @@ static int s3c24xx_i2c_remove(struct platform_device *pdev)
{
struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev);
clk_unprepare(i2c->clk);
pm_runtime_disable(&i2c->adap.dev);
pm_runtime_disable(&pdev->dev);
@ -1293,13 +1301,16 @@ static int s3c24xx_i2c_resume_noirq(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev);
int ret;
if (!IS_ERR(i2c->sysreg))
regmap_write(i2c->sysreg, EXYNOS5_SYS_I2C_CFG, i2c->sys_i2c_cfg);
clk_prepare_enable(i2c->clk);
ret = clk_enable(i2c->clk);
if (ret)
return ret;
s3c24xx_i2c_init(i2c);
clk_disable_unprepare(i2c->clk);
clk_disable(i2c->clk);
i2c->suspended = 0;
return 0;

12
drivers/i2c/busses/i2c-sh_mobile.c
View File

@ -139,6 +139,7 @@ struct sh_mobile_i2c_data {
int pos;
int sr;
bool send_stop;
bool stop_after_dma;
struct resource *res;
struct dma_chan *dma_tx;
@ -407,7 +408,7 @@ static int sh_mobile_i2c_isr_tx(struct sh_mobile_i2c_data *pd)
if (pd->pos == pd->msg->len) {
/* Send stop if we haven't yet (DMA case) */
if (pd->send_stop && (iic_rd(pd, ICCR) & ICCR_BBSY))
if (pd->send_stop && pd->stop_after_dma)
i2c_op(pd, OP_TX_STOP, 0);
return 1;
}
@ -449,6 +450,13 @@ static int sh_mobile_i2c_isr_rx(struct sh_mobile_i2c_data *pd)
real_pos = pd->pos - 2;
if (pd->pos == pd->msg->len) {
if (pd->stop_after_dma) {
/* Simulate PIO end condition after DMA transfer */
i2c_op(pd, OP_RX_STOP, 0);
pd->pos++;
break;
}
if (real_pos < 0) {
i2c_op(pd, OP_RX_STOP, 0);
break;
@ -536,6 +544,7 @@ static void sh_mobile_i2c_dma_callback(void *data)
sh_mobile_i2c_dma_unmap(pd);
pd->pos = pd->msg->len;
pd->stop_after_dma = true;
iic_set_clr(pd, ICIC, 0, ICIC_TDMAE | ICIC_RDMAE);
}
@ -726,6 +735,7 @@ static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter,
bool do_start = pd->send_stop || !i;
msg = &msgs[i];
pd->send_stop = i == num - 1 || msg->flags & I2C_M_STOP;
pd->stop_after_dma = false;
err = start_ch(pd, msg, do_start);
if (err)

2
drivers/i2c/i2c-core.c
View File

@ -2972,6 +2972,7 @@ trace:
}
EXPORT_SYMBOL(i2c_smbus_xfer);
#if IS_ENABLED(CONFIG_I2C_SLAVE)
int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb)
{
int ret;
@ -3019,6 +3020,7 @@ int i2c_slave_unregister(struct i2c_client *client)
return ret;
}
EXPORT_SYMBOL_GPL(i2c_slave_unregister);
#endif
MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>");
MODULE_DESCRIPTION("I2C-Bus main module");

4
drivers/i2c/i2c-slave-eeprom.c
View File

@ -74,7 +74,7 @@ static ssize_t i2c_slave_eeprom_bin_read(struct file *filp, struct kobject *kobj
struct eeprom_data *eeprom;
unsigned long flags;
if (off + count >= attr->size)
if (off + count > attr->size)
return -EFBIG;
eeprom = dev_get_drvdata(container_of(kobj, struct device, kobj));
@ -92,7 +92,7 @@ static ssize_t i2c_slave_eeprom_bin_write(struct file *filp, struct kobject *kob
struct eeprom_data *eeprom;
unsigned long flags;
if (off + count >= attr->size)
if (off + count > attr->size)
return -EFBIG;
eeprom = dev_get_drvdata(container_of(kobj, struct device, kobj));

6
include/linux/i2c.h
View File

@ -228,7 +228,9 @@ struct i2c_client {
struct device dev; /* the device structure */
int irq; /* irq issued by device */
struct list_head detected;
#if IS_ENABLED(CONFIG_I2C_SLAVE)
i2c_slave_cb_t slave_cb; /* callback for slave mode */
#endif
};
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
@ -253,6 +255,7 @@ static inline void i2c_set_clientdata(struct i2c_client *dev, void *data)
/* I2C slave support */
#if IS_ENABLED(CONFIG_I2C_SLAVE)
enum i2c_slave_event {
I2C_SLAVE_REQ_READ_START,
I2C_SLAVE_REQ_READ_END,
@ -269,6 +272,7 @@ static inline int i2c_slave_event(struct i2c_client *client,
{
return client->slave_cb(client, event, val);
}
#endif
/**
* struct i2c_board_info - template for device creation
@ -404,8 +408,10 @@ struct i2c_algorithm {
/* To determine what the adapter supports */
u32 (*functionality) (struct i2c_adapter *);
#if IS_ENABLED(CONFIG_I2C_SLAVE)
int (*reg_slave)(struct i2c_client *client);
int (*unreg_slave)(struct i2c_client *client);
#endif
};
/**