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

Pull i2c fixes from Wolfram Sang:
 "I2C has three driver bugfixes for you. We agreed on the Mac regression
  to go in via I2C"

* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  macintosh: therm_windtunnel: fix regression when instantiating devices
  i2c: altera: Fix potential integer overflow
  i2c: jz4780: silence log flood on txabrt
This commit is contained in:
Linus Torvalds 2020-02-29 19:16:46 -06:00
parent 7557c1b3f7 38b17afb0e
commit fb279f4e23
3 changed files with 36 additions and 58 deletions
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2
drivers/i2c/busses/i2c-altera.c
View File

@ -171,7 +171,7 @@ static void altr_i2c_init(struct altr_i2c_dev *idev)
/* SCL Low Time */
writel(t_low, idev->base + ALTR_I2C_SCL_LOW);
/* SDA Hold Time, 300ns */
writel(div_u64(300 * clk_mhz, 1000), idev->base + ALTR_I2C_SDA_HOLD);
writel(3 * clk_mhz / 10, idev->base + ALTR_I2C_SDA_HOLD);
/* Mask all master interrupt bits */
altr_i2c_int_enable(idev, ALTR_I2C_ALL_IRQ, false);

36
drivers/i2c/busses/i2c-jz4780.c
View File

@ -78,25 +78,6 @@
#define X1000_I2C_DC_STOP BIT(9)
static const char * const jz4780_i2c_abrt_src[] = {
"ABRT_7B_ADDR_NOACK",
"ABRT_10ADDR1_NOACK",
"ABRT_10ADDR2_NOACK",
"ABRT_XDATA_NOACK",
"ABRT_GCALL_NOACK",
"ABRT_GCALL_READ",
"ABRT_HS_ACKD",
"SBYTE_ACKDET",
"ABRT_HS_NORSTRT",
"SBYTE_NORSTRT",
"ABRT_10B_RD_NORSTRT",
"ABRT_MASTER_DIS",
"ARB_LOST",
"SLVFLUSH_TXFIFO",
"SLV_ARBLOST",
"SLVRD_INTX",
};
#define JZ4780_I2C_INTST_IGC BIT(11)
#define JZ4780_I2C_INTST_ISTT BIT(10)
#define JZ4780_I2C_INTST_ISTP BIT(9)
@ -576,21 +557,8 @@ done:
static void jz4780_i2c_txabrt(struct jz4780_i2c *i2c, int src)
{
int i;
dev_err(&i2c->adap.dev, "txabrt: 0x%08x\n", src);
dev_err(&i2c->adap.dev, "device addr=%x\n",
jz4780_i2c_readw(i2c, JZ4780_I2C_TAR));
dev_err(&i2c->adap.dev, "send cmd count:%d %d\n",
i2c->cmd, i2c->cmd_buf[i2c->cmd]);
dev_err(&i2c->adap.dev, "receive data count:%d %d\n",
i2c->cmd, i2c->data_buf[i2c->cmd]);
for (i = 0; i < 16; i++) {
if (src & BIT(i))
dev_dbg(&i2c->adap.dev, "I2C TXABRT[%d]=%s\n",
i, jz4780_i2c_abrt_src[i]);
}
dev_dbg(&i2c->adap.dev, "txabrt: 0x%08x, cmd: %d, send: %d, recv: %d\n",
src, i2c->cmd, i2c->cmd_buf[i2c->cmd], i2c->data_buf[i2c->cmd]);
}
static inline int jz4780_i2c_xfer_read(struct jz4780_i2c *i2c,

56
drivers/macintosh/therm_windtunnel.c
View File

@ -300,9 +300,11 @@ static int control_loop(void *dummy)
/* i2c probing and setup */
/************************************************************************/
static int
do_attach( struct i2c_adapter *adapter )
static void do_attach(struct i2c_adapter *adapter)
{
struct i2c_board_info info = { };
struct device_node *np;
/* scan 0x48-0x4f (DS1775) and 0x2c-2x2f (ADM1030) */
static const unsigned short scan_ds1775[] = {
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
@ -313,25 +315,24 @@ do_attach( struct i2c_adapter *adapter )
I2C_CLIENT_END
};
if( strncmp(adapter->name, "uni-n", 5) )
return 0;
if (x.running || strncmp(adapter->name, "uni-n", 5))
return;
if( !x.running ) {
struct i2c_board_info info;
memset(&info, 0, sizeof(struct i2c_board_info));
strlcpy(info.type, "therm_ds1775", I2C_NAME_SIZE);
np = of_find_compatible_node(adapter->dev.of_node, NULL, "MAC,ds1775");
if (np) {
of_node_put(np);
} else {
strlcpy(info.type, "MAC,ds1775", I2C_NAME_SIZE);
i2c_new_probed_device(adapter, &info, scan_ds1775, NULL);
strlcpy(info.type, "therm_adm1030", I2C_NAME_SIZE);
i2c_new_probed_device(adapter, &info, scan_adm1030, NULL);
if( x.thermostat && x.fan ) {
x.running = 1;
x.poll_task = kthread_run(control_loop, NULL, "g4fand");
}
}
return 0;
np = of_find_compatible_node(adapter->dev.of_node, NULL, "MAC,adm1030");
if (np) {
of_node_put(np);
} else {
strlcpy(info.type, "MAC,adm1030", I2C_NAME_SIZE);
i2c_new_probed_device(adapter, &info, scan_adm1030, NULL);
}
}
static int
@ -404,8 +405,8 @@ out:
enum chip { ds1775, adm1030 };
static const struct i2c_device_id therm_windtunnel_id[] = {
{ "therm_ds1775", ds1775 },
{ "therm_adm1030", adm1030 },
{ "MAC,ds1775", ds1775 },
{ "MAC,adm1030", adm1030 },
{ }
};
MODULE_DEVICE_TABLE(i2c, therm_windtunnel_id);
@ -414,6 +415,7 @@ static int
do_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = cl->adapter;
int ret = 0;
if( !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA
| I2C_FUNC_SMBUS_WRITE_BYTE) )
@ -421,11 +423,19 @@ do_probe(struct i2c_client *cl, const struct i2c_device_id *id)
switch (id->driver_data) {
case adm1030:
return attach_fan( cl );
ret = attach_fan(cl);
break;
case ds1775:
return attach_thermostat(cl);
ret = attach_thermostat(cl);
break;
}
return 0;
if (!x.running && x.thermostat && x.fan) {
x.running = 1;
x.poll_task = kthread_run(control_loop, NULL, "g4fand");
}
return ret;
}
static struct i2c_driver g4fan_driver = {