Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull more i2c updates from Wolfram Sang:
"Mostly bugfixes, small but wanted cleanups, and Paul's init.h removal
applied"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: rcar: fix NACK error code
i2c: update i2c_algorithm documentation
i2c: rcar: use devm_clk_get to ensure clock is properly ref-counted
i2c: rcar: do not print error if device nacks transfer
i2c: rely on driver core when sanitizing devices
i2c: delete non-required instances of include <linux/init.h>
i2c: acorn: is tristate and should use module.h
i2c: piix4: Standardize log messages
i2c: piix4: Use different message for AMD Auxiliary SMBus Controller
i2c: piix4: Add support for AMD ML and CZ SMBus changes
diff --git a/Documentation/i2c/busses/i2c-piix4 b/Documentation/i2c/busses/i2c-piix4
index c097e0f..aa959fd 100644
--- a/Documentation/i2c/busses/i2c-piix4
+++ b/Documentation/i2c/busses/i2c-piix4
@@ -13,7 +13,7 @@
* AMD SP5100 (SB700 derivative found on some server mainboards)
Datasheet: Publicly available at the AMD website
http://support.amd.com/us/Embedded_TechDocs/44413.pdf
- * AMD Hudson-2, CZ
+ * AMD Hudson-2, ML, CZ
Datasheet: Not publicly available
* Standard Microsystems (SMSC) SLC90E66 (Victory66) southbridge
Datasheet: Publicly available at the SMSC website http://www.smsc.com
diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c
index b7a6acf..65ef966 100644
--- a/drivers/i2c/algos/i2c-algo-bit.c
+++ b/drivers/i2c/algos/i2c-algo-bit.c
@@ -25,7 +25,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
-#include <linux/init.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/i2c.h>
diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c
index f892a42..8b10f88 100644
--- a/drivers/i2c/algos/i2c-algo-pca.c
+++ b/drivers/i2c/algos/i2c-algo-pca.c
@@ -24,7 +24,6 @@
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/jiffies.h>
-#include <linux/init.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-pca.h>
diff --git a/drivers/i2c/algos/i2c-algo-pcf.c b/drivers/i2c/algos/i2c-algo-pcf.c
index 5c23795..3437009 100644
--- a/drivers/i2c/algos/i2c-algo-pcf.c
+++ b/drivers/i2c/algos/i2c-algo-pcf.c
@@ -30,7 +30,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
-#include <linux/init.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-pcf.h>
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 6bcdea5..f5ed031 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -152,6 +152,7 @@
ATI SB700/SP5100
ATI SB800
AMD Hudson-2
+ AMD ML
AMD CZ
Serverworks OSB4
Serverworks CSB5
diff --git a/drivers/i2c/busses/i2c-acorn.c b/drivers/i2c/busses/i2c-acorn.c
index ed9f48d..9d7be5a 100644
--- a/drivers/i2c/busses/i2c-acorn.c
+++ b/drivers/i2c/busses/i2c-acorn.c
@@ -12,7 +12,7 @@
* On Acorn machines, the following i2c devices are on the bus:
* - PCF8583 real time clock & static RAM
*/
-#include <linux/init.h>
+#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c
index 3f49181..7d60d3a 100644
--- a/drivers/i2c/busses/i2c-ali1535.c
+++ b/drivers/i2c/busses/i2c-ali1535.c
@@ -58,7 +58,6 @@
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-ali1563.c b/drivers/i2c/busses/i2c-ali1563.c
index 84ccd94..4611e47 100644
--- a/drivers/i2c/busses/i2c-ali1563.c
+++ b/drivers/i2c/busses/i2c-ali1563.c
@@ -20,7 +20,6 @@
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/pci.h>
-#include <linux/init.h>
#include <linux/acpi.h>
#define ALI1563_MAX_TIMEOUT 500
diff --git a/drivers/i2c/busses/i2c-ali15x3.c b/drivers/i2c/busses/i2c-ali15x3.c
index 26bcc61..4823206 100644
--- a/drivers/i2c/busses/i2c-ali15x3.c
+++ b/drivers/i2c/busses/i2c-ali15x3.c
@@ -65,7 +65,6 @@
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-amd756.c b/drivers/i2c/busses/i2c-amd756.c
index e13e2aa..819d3c1 100644
--- a/drivers/i2c/busses/i2c-amd756.c
+++ b/drivers/i2c/busses/i2c-amd756.c
@@ -41,7 +41,6 @@
#include <linux/stddef.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-amd8111.c b/drivers/i2c/busses/i2c-amd8111.c
index a44e6e7..f3d4d79 100644
--- a/drivers/i2c/busses/i2c-amd8111.c
+++ b/drivers/i2c/busses/i2c-amd8111.c
@@ -13,7 +13,6 @@
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/ioport.h>
-#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/acpi.h>
diff --git a/drivers/i2c/busses/i2c-au1550.c b/drivers/i2c/busses/i2c-au1550.c
index b5b8923..8762458 100644
--- a/drivers/i2c/busses/i2c-au1550.c
+++ b/drivers/i2c/busses/i2c-au1550.c
@@ -31,7 +31,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
-#include <linux/init.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/slab.h>
diff --git a/drivers/i2c/busses/i2c-cbus-gpio.c b/drivers/i2c/busses/i2c-cbus-gpio.c
index ce7ffba..bdf040f 100644
--- a/drivers/i2c/busses/i2c-cbus-gpio.c
+++ b/drivers/i2c/busses/i2c-cbus-gpio.c
@@ -19,7 +19,6 @@
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
-#include <linux/init.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/errno.h>
diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
index 3e5ea2c..be7f0a2 100644
--- a/drivers/i2c/busses/i2c-cpm.c
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -33,7 +33,6 @@
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/slab.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/stddef.h>
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index ff15ae9..e08e458 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -18,7 +18,6 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
-#include <linux/init.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/fs.h>
diff --git a/drivers/i2c/busses/i2c-exynos5.c b/drivers/i2c/busses/i2c-exynos5.c
index 044f85b..9fd711c 100644
--- a/drivers/i2c/busses/i2c-exynos5.c
+++ b/drivers/i2c/busses/i2c-exynos5.c
@@ -12,7 +12,6 @@
#include <linux/module.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/time.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
diff --git a/drivers/i2c/busses/i2c-highlander.c b/drivers/i2c/busses/i2c-highlander.c
index 436b0f2..512fcfa 100644
--- a/drivers/i2c/busses/i2c-highlander.c
+++ b/drivers/i2c/busses/i2c-highlander.c
@@ -12,7 +12,6 @@
* of this archive for more details.
*/
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
diff --git a/drivers/i2c/busses/i2c-hydra.c b/drivers/i2c/busses/i2c-hydra.c
index 79c3d90..e248257 100644
--- a/drivers/i2c/busses/i2c-hydra.c
+++ b/drivers/i2c/busses/i2c-hydra.c
@@ -27,7 +27,6 @@
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
-#include <linux/init.h>
#include <linux/io.h>
#include <asm/hydra.h>
diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c
index f744410..274312c 100644
--- a/drivers/i2c/busses/i2c-ibm_iic.c
+++ b/drivers/i2c/busses/i2c-ibm_iic.c
@@ -36,7 +36,6 @@
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/slab.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/irq.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-iop3xx.c b/drivers/i2c/busses/i2c-iop3xx.c
index dd24aa0..3d16c2f 100644
--- a/drivers/i2c/busses/i2c-iop3xx.c
+++ b/drivers/i2c/busses/i2c-iop3xx.c
@@ -34,7 +34,6 @@
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/slab.h>
-#include <linux/init.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
diff --git a/drivers/i2c/busses/i2c-isch.c b/drivers/i2c/busses/i2c-isch.c
index af21304..cf99dbf 100644
--- a/drivers/i2c/busses/i2c-isch.c
+++ b/drivers/i2c/busses/i2c-isch.c
@@ -33,7 +33,6 @@
#include <linux/stddef.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/io.h>
#include <linux/acpi.h>
diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c
index bb132ea..8ce4f51 100644
--- a/drivers/i2c/busses/i2c-ismt.c
+++ b/drivers/i2c/busses/i2c-ismt.c
@@ -62,7 +62,6 @@
*/
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
index b6a741c..f539163 100644
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -16,7 +16,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
-#include <linux/init.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
diff --git a/drivers/i2c/busses/i2c-nforce2.c b/drivers/i2c/busses/i2c-nforce2.c
index ac88f40..0038c45 100644
--- a/drivers/i2c/busses/i2c-nforce2.c
+++ b/drivers/i2c/busses/i2c-nforce2.c
@@ -51,7 +51,6 @@
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/ioport.h>
-#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/dmi.h>
diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index c61f37a..80e06fa 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -15,7 +15,6 @@
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c
index b929ba2..81042b0 100644
--- a/drivers/i2c/busses/i2c-octeon.c
+++ b/drivers/i2c/busses/i2c-octeon.c
@@ -18,7 +18,6 @@
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/slab.h>
-#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/of.h>
diff --git a/drivers/i2c/busses/i2c-pca-platform.c b/drivers/i2c/busses/i2c-pca-platform.c
index 39e2755..845f125 100644
--- a/drivers/i2c/busses/i2c-pca-platform.c
+++ b/drivers/i2c/busses/i2c-pca-platform.c
@@ -12,7 +12,6 @@
*/
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/jiffies.h>
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index a028617..39dd8ec 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -22,7 +22,7 @@
Intel PIIX4, 440MX
Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100
ATI IXP200, IXP300, IXP400, SB600, SB700/SP5100, SB800
- AMD Hudson-2, CZ
+ AMD Hudson-2, ML, CZ
SMSC Victory66
Note: we assume there can only be one device, with one or more
@@ -38,7 +38,6 @@
#include <linux/ioport.h>
#include <linux/i2c.h>
#include <linux/slab.h>
-#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/acpi.h>
#include <linux/io.h>
@@ -208,16 +207,16 @@
"WARNING: SMBus interface has been FORCEFULLY ENABLED!\n");
} else {
dev_err(&PIIX4_dev->dev,
- "Host SMBus controller not enabled!\n");
+ "SMBus Host Controller not enabled!\n");
release_region(piix4_smba, SMBIOSIZE);
return -ENODEV;
}
}
if (((temp & 0x0E) == 8) || ((temp & 0x0E) == 2))
- dev_dbg(&PIIX4_dev->dev, "Using Interrupt 9 for SMBus.\n");
+ dev_dbg(&PIIX4_dev->dev, "Using IRQ for SMBus\n");
else if ((temp & 0x0E) == 0)
- dev_dbg(&PIIX4_dev->dev, "Using Interrupt SMI# for SMBus.\n");
+ dev_dbg(&PIIX4_dev->dev, "Using SMI# for SMBus\n");
else
dev_err(&PIIX4_dev->dev, "Illegal Interrupt configuration "
"(or code out of date)!\n");
@@ -235,7 +234,8 @@
{
unsigned short piix4_smba;
unsigned short smba_idx = 0xcd6;
- u8 smba_en_lo, smba_en_hi, i2ccfg, i2ccfg_offset = 0x10, smb_en;
+ u8 smba_en_lo, smba_en_hi, smb_en, smb_en_status;
+ u8 i2ccfg, i2ccfg_offset = 0x10;
/* SB800 and later SMBus does not support forcing address */
if (force || force_addr) {
@@ -245,7 +245,15 @@
}
/* Determine the address of the SMBus areas */
- smb_en = (aux) ? 0x28 : 0x2c;
+ if ((PIIX4_dev->vendor == PCI_VENDOR_ID_AMD &&
+ PIIX4_dev->device == PCI_DEVICE_ID_AMD_HUDSON2_SMBUS &&
+ PIIX4_dev->revision >= 0x41) ||
+ (PIIX4_dev->vendor == PCI_VENDOR_ID_AMD &&
+ PIIX4_dev->device == 0x790b &&
+ PIIX4_dev->revision >= 0x49))
+ smb_en = 0x00;
+ else
+ smb_en = (aux) ? 0x28 : 0x2c;
if (!request_region(smba_idx, 2, "smba_idx")) {
dev_err(&PIIX4_dev->dev, "SMBus base address index region "
@@ -258,13 +266,22 @@
smba_en_hi = inb_p(smba_idx + 1);
release_region(smba_idx, 2);
- if ((smba_en_lo & 1) == 0) {
+ if (!smb_en) {
+ smb_en_status = smba_en_lo & 0x10;
+ piix4_smba = smba_en_hi << 8;
+ if (aux)
+ piix4_smba |= 0x20;
+ } else {
+ smb_en_status = smba_en_lo & 0x01;
+ piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0;
+ }
+
+ if (!smb_en_status) {
dev_err(&PIIX4_dev->dev,
- "Host SMBus controller not enabled!\n");
+ "SMBus Host Controller not enabled!\n");
return -ENODEV;
}
- piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0;
if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
return -ENODEV;
@@ -277,7 +294,8 @@
/* Aux SMBus does not support IRQ information */
if (aux) {
dev_info(&PIIX4_dev->dev,
- "SMBus Host Controller at 0x%x\n", piix4_smba);
+ "Auxiliary SMBus Host Controller at 0x%x\n",
+ piix4_smba);
return piix4_smba;
}
@@ -292,9 +310,9 @@
release_region(piix4_smba + i2ccfg_offset, 1);
if (i2ccfg & 1)
- dev_dbg(&PIIX4_dev->dev, "Using IRQ for SMBus.\n");
+ dev_dbg(&PIIX4_dev->dev, "Using IRQ for SMBus\n");
else
- dev_dbg(&PIIX4_dev->dev, "Using SMI# for SMBus.\n");
+ dev_dbg(&PIIX4_dev->dev, "Using SMI# for SMBus\n");
dev_info(&PIIX4_dev->dev,
"SMBus Host Controller at 0x%x, revision %d\n",
diff --git a/drivers/i2c/busses/i2c-pmcmsp.c b/drivers/i2c/busses/i2c-pmcmsp.c
index f6389e2..8564768 100644
--- a/drivers/i2c/busses/i2c-pmcmsp.c
+++ b/drivers/i2c/busses/i2c-pmcmsp.c
@@ -26,7 +26,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c
index 8c87f4a..01e9677 100644
--- a/drivers/i2c/busses/i2c-powermac.c
+++ b/drivers/i2c/busses/i2c-powermac.c
@@ -24,7 +24,6 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/of_irq.h>
diff --git a/drivers/i2c/busses/i2c-puv3.c b/drivers/i2c/busses/i2c-puv3.c
index ac80199..c83fc3c 100644
--- a/drivers/i2c/busses/i2c-puv3.c
+++ b/drivers/i2c/busses/i2c-puv3.c
@@ -17,7 +17,6 @@
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 2c2fd7c..0282d4d 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -26,7 +26,6 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/i2c.h>
@@ -111,6 +110,7 @@
void __iomem *io;
struct i2c_adapter adap;
struct i2c_msg *msg;
+ struct clk *clk;
spinlock_t lock;
wait_queue_head_t wait;
@@ -227,18 +227,12 @@
u32 bus_speed,
struct device *dev)
{
- struct clk *clkp = clk_get(dev, NULL);
u32 scgd, cdf;
u32 round, ick;
u32 scl;
u32 cdf_width;
unsigned long rate;
- if (IS_ERR(clkp)) {
- dev_err(dev, "couldn't get clock\n");
- return PTR_ERR(clkp);
- }
-
switch (priv->devtype) {
case I2C_RCAR_GEN1:
cdf_width = 2;
@@ -266,7 +260,7 @@
* clkp : peripheral_clk
* F[] : integer up-valuation
*/
- rate = clk_get_rate(clkp);
+ rate = clk_get_rate(priv->clk);
cdf = rate / 20000000;
if (cdf >= 1 << cdf_width) {
dev_err(dev, "Input clock %lu too high\n", rate);
@@ -308,7 +302,7 @@
scgd_find:
dev_dbg(dev, "clk %d/%d(%lu), round %u, CDF:0x%x, SCGD: 0x%x\n",
- scl, bus_speed, clk_get_rate(clkp), round, cdf, scgd);
+ scl, bus_speed, clk_get_rate(priv->clk), round, cdf, scgd);
/*
* keep icccr value
@@ -604,7 +598,7 @@
* error handling
*/
if (rcar_i2c_flags_has(priv, ID_NACK)) {
- ret = -EREMOTEIO;
+ ret = -ENXIO;
break;
}
@@ -623,7 +617,7 @@
pm_runtime_put(dev);
- if (ret < 0)
+ if (ret < 0 && ret != -ENXIO)
dev_err(dev, "error %d : %x\n", ret, priv->flags);
return ret;
@@ -664,6 +658,12 @@
return -ENOMEM;
}
+ priv->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ dev_err(dev, "cannot get clock\n");
+ return PTR_ERR(priv->clk);
+ }
+
bus_speed = 100000; /* default 100 kHz */
ret = of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed);
if (ret < 0 && pdata && pdata->bus_speed)
diff --git a/drivers/i2c/busses/i2c-scmi.c b/drivers/i2c/busses/i2c-scmi.c
index 5992355..dfc98df 100644
--- a/drivers/i2c/busses/i2c-scmi.c
+++ b/drivers/i2c/busses/i2c-scmi.c
@@ -12,7 +12,6 @@
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
-#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
diff --git a/drivers/i2c/busses/i2c-sh7760.c b/drivers/i2c/busses/i2c-sh7760.c
index 5e8f136..d76f3d9 100644
--- a/drivers/i2c/busses/i2c-sh7760.c
+++ b/drivers/i2c/busses/i2c-sh7760.c
@@ -11,7 +11,6 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
diff --git a/drivers/i2c/busses/i2c-simtec.c b/drivers/i2c/busses/i2c-simtec.c
index 4fc87e7..294c80f 100644
--- a/drivers/i2c/busses/i2c-simtec.c
+++ b/drivers/i2c/busses/i2c-simtec.c
@@ -20,7 +20,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
diff --git a/drivers/i2c/busses/i2c-sis630.c b/drivers/i2c/busses/i2c-sis630.c
index 36a9556..19b8505 100644
--- a/drivers/i2c/busses/i2c-sis630.c
+++ b/drivers/i2c/busses/i2c-sis630.c
@@ -45,7 +45,6 @@
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/ioport.h>
-#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-sis96x.c b/drivers/i2c/busses/i2c-sis96x.c
index b9faf9b..f8aa0c2 100644
--- a/drivers/i2c/busses/i2c-sis96x.c
+++ b/drivers/i2c/busses/i2c-sis96x.c
@@ -36,7 +36,6 @@
#include <linux/stddef.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
-#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-via.c b/drivers/i2c/busses/i2c-via.c
index be66251..49d7f14 100644
--- a/drivers/i2c/busses/i2c-via.c
+++ b/drivers/i2c/busses/i2c-via.c
@@ -22,7 +22,6 @@
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/ioport.h>
-#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/io.h>
diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
index 6f9918f..2810750 100644
--- a/drivers/i2c/busses/i2c-xiic.c
+++ b/drivers/i2c/busses/i2c-xiic.c
@@ -30,7 +30,6 @@
*/
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/delay.h>
diff --git a/drivers/i2c/busses/i2c-xlr.c b/drivers/i2c/busses/i2c-xlr.c
index 7945b05..17f7352 100644
--- a/drivers/i2c/busses/i2c-xlr.c
+++ b/drivers/i2c/busses/i2c-xlr.c
@@ -11,7 +11,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
-#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/errno.h>
diff --git a/drivers/i2c/busses/scx200_i2c.c b/drivers/i2c/busses/scx200_i2c.c
index ae1258b..8eadf0f4 100644
--- a/drivers/i2c/busses/scx200_i2c.c
+++ b/drivers/i2c/busses/scx200_i2c.c
@@ -26,7 +26,6 @@
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
-#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/io.h>
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 82f7a53..5fb80b8 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -261,10 +261,9 @@
acpi_dev_pm_attach(&client->dev, true);
status = driver->probe(client, i2c_match_id(driver->id_table, client));
- if (status) {
- i2c_set_clientdata(client, NULL);
+ if (status)
acpi_dev_pm_detach(&client->dev, true);
- }
+
return status;
}
@@ -272,7 +271,7 @@
{
struct i2c_client *client = i2c_verify_client(dev);
struct i2c_driver *driver;
- int status;
+ int status = 0;
if (!client || !dev->driver)
return 0;
@@ -281,12 +280,8 @@
if (driver->remove) {
dev_dbg(dev, "remove\n");
status = driver->remove(client);
- } else {
- dev->driver = NULL;
- status = 0;
}
- if (status == 0)
- i2c_set_clientdata(client, NULL);
+
acpi_dev_pm_detach(&client->dev, true);
return status;
}
diff --git a/drivers/i2c/muxes/i2c-arb-gpio-challenge.c b/drivers/i2c/muxes/i2c-arb-gpio-challenge.c
index c58e093..69afffa 100644
--- a/drivers/i2c/muxes/i2c-arb-gpio-challenge.c
+++ b/drivers/i2c/muxes/i2c-arb-gpio-challenge.c
@@ -19,7 +19,6 @@
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
-#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c
index 8a8c56f..d8989c8 100644
--- a/drivers/i2c/muxes/i2c-mux-gpio.c
+++ b/drivers/i2c/muxes/i2c-mux-gpio.c
@@ -12,7 +12,6 @@
#include <linux/i2c-mux.h>
#include <linux/i2c-mux-gpio.h>
#include <linux/platform_device.h>
-#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/gpio.h>
diff --git a/drivers/i2c/muxes/i2c-mux-pca9541.c b/drivers/i2c/muxes/i2c-mux-pca9541.c
index c4f08ad..cb77277 100644
--- a/drivers/i2c/muxes/i2c-mux-pca9541.c
+++ b/drivers/i2c/muxes/i2c-mux-pca9541.c
@@ -17,7 +17,6 @@
*/
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/delay.h>
#include <linux/slab.h>
diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c
index 8720b6a..550bd36 100644
--- a/drivers/i2c/muxes/i2c-mux-pca954x.c
+++ b/drivers/i2c/muxes/i2c-mux-pca954x.c
@@ -40,7 +40,6 @@
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/i2c/pca954x.h>
-#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
diff --git a/drivers/i2c/muxes/i2c-mux-pinctrl.c b/drivers/i2c/muxes/i2c-mux-pinctrl.c
index d7978dc..4ff0ef3 100644
--- a/drivers/i2c/muxes/i2c-mux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-mux-pinctrl.c
@@ -18,7 +18,6 @@
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
-#include <linux/init.h>
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/i2c-mux-pinctrl.h>
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index d9c8dbd3..deddeb8 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -342,11 +342,25 @@
}
#endif /* I2C_BOARDINFO */
-/*
+/**
+ * struct i2c_algorithm - represent I2C transfer method
+ * @master_xfer: Issue a set of i2c transactions to the given I2C adapter
+ * defined by the msgs array, with num messages available to transfer via
+ * the adapter specified by adap.
+ * @smbus_xfer: Issue smbus transactions to the given I2C adapter. If this
+ * is not present, then the bus layer will try and convert the SMBus calls
+ * into I2C transfers instead.
+ * @functionality: Return the flags that this algorithm/adapter pair supports
+ * from the I2C_FUNC_* flags.
+ *
* The following structs are for those who like to implement new bus drivers:
* i2c_algorithm is the interface to a class of hardware solutions which can
* be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584
* to name two of the most common.
+ *
+ * The return codes from the @master_xfer field should indicate the type of
+ * error code that occured during the transfer, as documented in the kernel
+ * Documentation file Documentation/i2c/fault-codes.
*/
struct i2c_algorithm {
/* If an adapter algorithm can't do I2C-level access, set master_xfer