diff options
Diffstat (limited to 'drivers/i2c')
40 files changed, 106 insertions, 551 deletions
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig index 02ce9cff5fc..d06083fdffb 100644 --- a/drivers/i2c/Kconfig +++ b/drivers/i2c/Kconfig @@ -73,7 +73,6 @@ config I2C_SMBUS source drivers/i2c/algos/Kconfig source drivers/i2c/busses/Kconfig -source drivers/i2c/chips/Kconfig config I2C_DEBUG_CORE bool "I2C Core debugging messages" @@ -98,12 +97,4 @@ config I2C_DEBUG_BUS a problem with I2C support and want to see more of what is going on. -config I2C_DEBUG_CHIP - bool "I2C Chip debugging messages" - help - Say Y here if you want the I2C chip drivers to produce a bunch of - debug messages to the system log. Select this if you are having - a problem with I2C support and want to see more of what is going - on. - endif # I2C diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile index acd0250c16a..a7d9b4be9bb 100644 --- a/drivers/i2c/Makefile +++ b/drivers/i2c/Makefile @@ -6,7 +6,7 @@ obj-$(CONFIG_I2C_BOARDINFO) += i2c-boardinfo.o obj-$(CONFIG_I2C) += i2c-core.o obj-$(CONFIG_I2C_SMBUS) += i2c-smbus.o obj-$(CONFIG_I2C_CHARDEV) += i2c-dev.o -obj-y += busses/ chips/ algos/ +obj-y += algos/ busses/ ifeq ($(CONFIG_I2C_DEBUG_CORE),y) EXTRA_CFLAGS += -DDEBUG diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c index e25e13980af..a39e6cff86e 100644 --- a/drivers/i2c/algos/i2c-algo-bit.c +++ b/drivers/i2c/algos/i2c-algo-bit.c @@ -24,7 +24,6 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/delay.h> -#include <linux/slab.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/sched.h> @@ -522,6 +521,12 @@ static int bit_xfer(struct i2c_adapter *i2c_adap, int i, ret; unsigned short nak_ok; + if (adap->pre_xfer) { + ret = adap->pre_xfer(i2c_adap); + if (ret < 0) + return ret; + } + bit_dbg(3, &i2c_adap->dev, "emitting start condition\n"); i2c_start(adap); for (i = 0; i < num; i++) { @@ -570,6 +575,9 @@ static int bit_xfer(struct i2c_adapter *i2c_adap, bailout: bit_dbg(3, &i2c_adap->dev, "emitting stop condition\n"); i2c_stop(adap); + + if (adap->post_xfer) + adap->post_xfer(i2c_adap); return ret; } diff --git a/drivers/i2c/algos/i2c-algo-pcf.c b/drivers/i2c/algos/i2c-algo-pcf.c index 6b6bd06202b..5eebf562ff3 100644 --- a/drivers/i2c/algos/i2c-algo-pcf.c +++ b/drivers/i2c/algos/i2c-algo-pcf.c @@ -29,7 +29,6 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/delay.h> -#include <linux/slab.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/i2c.h> diff --git a/drivers/i2c/busses/i2c-amd8111.c b/drivers/i2c/busses/i2c-amd8111.c index d0dc970d737..2fbef27b6cd 100644 --- a/drivers/i2c/busses/i2c-amd8111.c +++ b/drivers/i2c/busses/i2c-amd8111.c @@ -17,6 +17,7 @@ #include <linux/i2c.h> #include <linux/delay.h> #include <linux/acpi.h> +#include <linux/slab.h> #include <asm/io.h> MODULE_LICENSE("GPL"); diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c index fe3fb567317..f1e14dd590c 100644 --- a/drivers/i2c/busses/i2c-bfin-twi.c +++ b/drivers/i2c/busses/i2c-bfin-twi.c @@ -12,6 +12,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/i2c.h> +#include <linux/slab.h> #include <linux/io.h> #include <linux/mm.h> #include <linux/timer.h> diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c index c89687a1083..4523364e672 100644 --- a/drivers/i2c/busses/i2c-davinci.c +++ b/drivers/i2c/busses/i2c-davinci.c @@ -35,6 +35,7 @@ #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/slab.h> #include <mach/hardware.h> diff --git a/drivers/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c index 3e72b69aa7f..b664ed8bbdb 100644 --- a/drivers/i2c/busses/i2c-designware.c +++ b/drivers/i2c/busses/i2c-designware.c @@ -36,6 +36,7 @@ #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/slab.h> /* * Registers offset diff --git a/drivers/i2c/busses/i2c-elektor.c b/drivers/i2c/busses/i2c-elektor.c index 448b4bf35eb..612255614a6 100644 --- a/drivers/i2c/busses/i2c-elektor.c +++ b/drivers/i2c/busses/i2c-elektor.c @@ -29,7 +29,6 @@ #include <linux/ioport.h> #include <linux/module.h> #include <linux/delay.h> -#include <linux/slab.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/pci.h> diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c index 32104eac8d3..c21077d248a 100644 --- a/drivers/i2c/busses/i2c-gpio.c +++ b/drivers/i2c/busses/i2c-gpio.c @@ -12,6 +12,7 @@ #include <linux/i2c-gpio.h> #include <linux/init.h> #include <linux/module.h> +#include <linux/slab.h> #include <linux/platform_device.h> #include <asm/gpio.h> diff --git a/drivers/i2c/busses/i2c-highlander.c b/drivers/i2c/busses/i2c-highlander.c index 87ecace415d..ce87a902c94 100644 --- a/drivers/i2c/busses/i2c-highlander.c +++ b/drivers/i2c/busses/i2c-highlander.c @@ -19,6 +19,7 @@ #include <linux/completion.h> #include <linux/io.h> #include <linux/delay.h> +#include <linux/slab.h> #define SMCR 0x00 #define SMCR_START (1 << 0) diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index 9da5b05cdb5..299b918455a 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -416,9 +416,11 @@ static int i801_block_transaction(union i2c_smbus_data *data, char read_write, data->block[0] = 32; /* max for SMBus block reads */ } + /* Experience has shown that the block buffer can only be used for + SMBus (not I2C) block transactions, even though the datasheet + doesn't mention this limitation. */ if ((i801_features & FEATURE_BLOCK_BUFFER) - && !(command == I2C_SMBUS_I2C_BLOCK_DATA - && read_write == I2C_SMBUS_READ) + && command != I2C_SMBUS_I2C_BLOCK_DATA && i801_set_block_buffer_mode() == 0) result = i801_block_transaction_by_block(data, read_write, hwpec); diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index 32375bddae7..d1ff9408dc1 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -47,6 +47,7 @@ #include <linux/sched.h> #include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/slab.h> #include <mach/irqs.h> #include <mach/hardware.h> @@ -145,10 +146,10 @@ static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy) "<%s> I2C Interrupted\n", __func__); return -EINTR; } - if (time_after(jiffies, orig_jiffies + HZ / 1000)) { + if (time_after(jiffies, orig_jiffies + msecs_to_jiffies(500))) { dev_dbg(&i2c_imx->adapter.dev, "<%s> I2C bus is busy\n", __func__); - return -EIO; + return -ETIMEDOUT; } schedule(); } @@ -443,6 +444,8 @@ static int i2c_imx_xfer(struct i2c_adapter *adapter, result = i2c_imx_read(i2c_imx, &msgs[i]); else result = i2c_imx_write(i2c_imx, &msgs[i]); + if (result) + goto fail0; } fail0: diff --git a/drivers/i2c/busses/i2c-ixp2000.c b/drivers/i2c/busses/i2c-ixp2000.c index c016f7a2c5f..5d8aed5ec21 100644 --- a/drivers/i2c/busses/i2c-ixp2000.c +++ b/drivers/i2c/busses/i2c-ixp2000.c @@ -32,6 +32,7 @@ #include <linux/module.h> #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> +#include <linux/slab.h> #include <mach/hardware.h> /* Pick up IXP2000-specific bits */ #include <mach/gpio.h> diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c index 78a15af3294..f1321f76378 100644 --- a/drivers/i2c/busses/i2c-mpc.c +++ b/drivers/i2c/busses/i2c-mpc.c @@ -19,6 +19,7 @@ #include <linux/init.h> #include <linux/of_platform.h> #include <linux/of_i2c.h> +#include <linux/slab.h> #include <linux/io.h> #include <linux/fsl_devices.h> diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index ed387ffa473..3623a449908 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -10,6 +10,7 @@ * or implied. */ #include <linux/kernel.h> +#include <linux/slab.h> #include <linux/module.h> #include <linux/spinlock.h> #include <linux/i2c.h> diff --git a/drivers/i2c/busses/i2c-nforce2.c b/drivers/i2c/busses/i2c-nforce2.c index 4a700587ef1..4a48dd4ef78 100644 --- a/drivers/i2c/busses/i2c-nforce2.c +++ b/drivers/i2c/busses/i2c-nforce2.c @@ -56,6 +56,7 @@ #include <linux/delay.h> #include <linux/dmi.h> #include <linux/acpi.h> +#include <linux/slab.h> #include <asm/io.h> MODULE_LICENSE("GPL"); diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index a15f731fa45..a4f8d33fa38 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -16,6 +16,7 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/delay.h> +#include <linux/slab.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/err.h> diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c index 0dabe643ec5..b4ed4ca802e 100644 --- a/drivers/i2c/busses/i2c-ocores.c +++ b/drivers/i2c/busses/i2c-ocores.c @@ -18,6 +18,7 @@ #include <linux/interrupt.h> #include <linux/wait.h> #include <linux/i2c-ocores.h> +#include <linux/slab.h> #include <asm/io.h> struct ocores_i2c { diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c index 60375504fa4..a2481f40ea1 100644 --- a/drivers/i2c/busses/i2c-octeon.c +++ b/drivers/i2c/busses/i2c-octeon.c @@ -14,6 +14,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/sched.h> +#include <linux/slab.h> #include <linux/init.h> #include <linux/io.h> diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index c7c237537f8..389ac6032a7 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -37,6 +37,7 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/io.h> +#include <linux/slab.h> /* I2C controller revisions */ #define OMAP_I2C_REV_2 0x20 @@ -902,6 +903,11 @@ omap_i2c_probe(struct platform_device *pdev) platform_set_drvdata(pdev, dev); + if (cpu_is_omap7xx()) + dev->reg_shift = 1; + else + dev->reg_shift = 2; + if ((r = omap_i2c_get_clocks(dev)) != 0) goto err_iounmap; @@ -925,11 +931,6 @@ omap_i2c_probe(struct platform_device *pdev) dev->b_hw = 1; /* Enable hardware fixes */ } - if (cpu_is_omap7xx()) - dev->reg_shift = 1; - else - dev->reg_shift = 2; - /* reset ASAP, clearing any IRQs */ omap_i2c_init(dev); diff --git a/drivers/i2c/busses/i2c-parport.c b/drivers/i2c/busses/i2c-parport.c index 220fca7f23a..846583ed476 100644 --- a/drivers/i2c/busses/i2c-parport.c +++ b/drivers/i2c/busses/i2c-parport.c @@ -32,6 +32,7 @@ #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> #include <linux/i2c-smbus.h> +#include <linux/slab.h> #include "i2c-parport.h" /* ----- Device list ------------------------------------------------------ */ diff --git a/drivers/i2c/busses/i2c-pasemi.c b/drivers/i2c/busses/i2c-pasemi.c index 0d20ff46a51..d3d4a4b43a1 100644 --- a/drivers/i2c/busses/i2c-pasemi.c +++ b/drivers/i2c/busses/i2c-pasemi.c @@ -24,6 +24,7 @@ #include <linux/sched.h> #include <linux/i2c.h> #include <linux/delay.h> +#include <linux/slab.h> #include <asm/io.h> static struct pci_driver pasemi_smb_driver; diff --git a/drivers/i2c/busses/i2c-pnx.c b/drivers/i2c/busses/i2c-pnx.c index 9532dee6b58..a97e3fec814 100644 --- a/drivers/i2c/busses/i2c-pnx.c +++ b/drivers/i2c/busses/i2c-pnx.c @@ -22,6 +22,7 @@ #include <linux/io.h> #include <linux/err.h> #include <linux/clk.h> +#include <linux/slab.h> #include <mach/hardware.h> #include <mach/i2c.h> @@ -172,6 +173,9 @@ static int i2c_pnx_master_xmit(struct i2c_pnx_algo_data *alg_data) /* We still have something to talk about... */ val = *alg_data->mif.buf++; + if (alg_data->mif.len == 1) + val |= stop_bit; + alg_data->mif.len--; iowrite32(val, I2C_REG_TX(alg_data)); @@ -245,6 +249,9 @@ static int i2c_pnx_master_rcv(struct i2c_pnx_algo_data *alg_data) __func__); if (alg_data->mif.len == 1) { + /* Last byte, do not acknowledge next rcv. */ + val |= stop_bit; + /* * Enable interrupt RFDAIE (data in Rx fifo), * and disable DRMIE (need data for Tx) @@ -632,6 +639,8 @@ static int __devinit i2c_pnx_probe(struct platform_device *pdev) */ tmp = ((freq / 1000) / I2C_PNX_SPEED_KHZ) / 2 - 2; + if (tmp > 0x3FF) + tmp = 0x3FF; iowrite32(tmp, I2C_REG_CKH(alg_data)); iowrite32(tmp, I2C_REG_CKL(alg_data)); diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c index 1c440a70ec6..b289ec99eeb 100644 --- a/drivers/i2c/busses/i2c-powermac.c +++ b/drivers/i2c/busses/i2c-powermac.c @@ -122,9 +122,14 @@ static s32 i2c_powermac_smbus_xfer( struct i2c_adapter* adap, rc = pmac_i2c_xfer(bus, addrdir, subsize, subaddr, buf, len); if (rc) { - dev_err(&adap->dev, - "I2C transfer at 0x%02x failed, size %d, err %d\n", - addrdir >> 1, size, rc); + if (rc == -ENXIO) + dev_dbg(&adap->dev, + "I2C transfer at 0x%02x failed, size %d, " + "err %d\n", addrdir >> 1, size, rc); + else + dev_err(&adap->dev, + "I2C transfer at 0x%02x failed, size %d, " + "err %d\n", addrdir >> 1, size, rc); goto bail; } @@ -175,10 +180,16 @@ static int i2c_powermac_master_xfer( struct i2c_adapter *adap, goto bail; } rc = pmac_i2c_xfer(bus, addrdir, 0, 0, msgs->buf, msgs->len); - if (rc < 0) - dev_err(&adap->dev, "I2C %s 0x%02x failed, err %d\n", - addrdir & 1 ? "read from" : "write to", addrdir >> 1, - rc); + if (rc < 0) { + if (rc == -ENXIO) + dev_dbg(&adap->dev, "I2C %s 0x%02x failed, err %d\n", + addrdir & 1 ? "read from" : "write to", + addrdir >> 1, rc); + else + dev_err(&adap->dev, "I2C %s 0x%02x failed, err %d\n", + addrdir & 1 ? "read from" : "write to", + addrdir >> 1, rc); + } bail: pmac_i2c_close(bus); return rc < 0 ? rc : 1; diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index 90ffbf6f9d4..14d249f5ed3 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -33,6 +33,7 @@ #include <linux/platform_device.h> #include <linux/err.h> #include <linux/clk.h> +#include <linux/slab.h> #include <asm/irq.h> #include <asm/io.h> diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index 1d8c98613fa..d27072b2249 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -34,6 +34,7 @@ #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/cpufreq.h> +#include <linux/slab.h> #include <asm/irq.h> #include <asm/io.h> diff --git a/drivers/i2c/busses/i2c-scmi.c b/drivers/i2c/busses/i2c-scmi.c index 365e0becaf1..388cbdc96db 100644 --- a/drivers/i2c/busses/i2c-scmi.c +++ b/drivers/i2c/busses/i2c-scmi.c @@ -33,6 +33,7 @@ struct acpi_smbus_cmi { u8 cap_info:1; u8 cap_read:1; u8 cap_write:1; + struct smbus_methods_t *methods; }; static const struct smbus_methods_t smbus_methods = { @@ -41,10 +42,19 @@ static const struct smbus_methods_t smbus_methods = { .mt_sbw = "_SBW", }; +/* Some IBM BIOSes omit the leading underscore */ +static const struct smbus_methods_t ibm_smbus_methods = { + .mt_info = "SBI_", + .mt_sbr = "SBR_", + .mt_sbw = "SBW_", +}; + static const struct acpi_device_id acpi_smbus_cmi_ids[] = { - {"SMBUS01", 0}, + {"SMBUS01", (kernel_ulong_t)&smbus_methods}, + {ACPI_SMBUS_IBM_HID, (kernel_ulong_t)&ibm_smbus_methods}, {"", 0} }; +MODULE_DEVICE_TABLE(acpi, acpi_smbus_cmi_ids); #define ACPI_SMBUS_STATUS_OK 0x00 #define ACPI_SMBUS_STATUS_FAIL 0x07 @@ -150,11 +160,11 @@ acpi_smbus_cmi_access(struct i2c_adapter *adap, u16 addr, unsigned short flags, if (read_write == I2C_SMBUS_READ) { protocol |= ACPI_SMBUS_PRTCL_READ; - method = smbus_methods.mt_sbr; + method = smbus_cmi->methods->mt_sbr; input.count = 3; } else { protocol |= ACPI_SMBUS_PRTCL_WRITE; - method = smbus_methods.mt_sbw; + method = smbus_cmi->methods->mt_sbw; input.count = 5; } @@ -290,13 +300,13 @@ static int acpi_smbus_cmi_add_cap(struct acpi_smbus_cmi *smbus_cmi, union acpi_object *obj; acpi_status status; - if (!strcmp(name, smbus_methods.mt_info)) { + if (!strcmp(name, smbus_cmi->methods->mt_info)) { status = acpi_evaluate_object(smbus_cmi->handle, - smbus_methods.mt_info, + smbus_cmi->methods->mt_info, NULL, &buffer); if (ACPI_FAILURE(status)) { ACPI_ERROR((AE_INFO, "Evaluating %s: %i", - smbus_methods.mt_info, status)); + smbus_cmi->methods->mt_info, status)); return -EIO; } @@ -319,9 +329,9 @@ static int acpi_smbus_cmi_add_cap(struct acpi_smbus_cmi *smbus_cmi, kfree(buffer.pointer); smbus_cmi->cap_info = 1; - } else if (!strcmp(name, smbus_methods.mt_sbr)) + } else if (!strcmp(name, smbus_cmi->methods->mt_sbr)) smbus_cmi->cap_read = 1; - else if (!strcmp(name, smbus_methods.mt_sbw)) + else if (!strcmp(name, smbus_cmi->methods->mt_sbw)) smbus_cmi->cap_write = 1; else ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unsupported CMI method: %s\n", @@ -349,6 +359,7 @@ static acpi_status acpi_smbus_cmi_query_methods(acpi_handle handle, u32 level, static int acpi_smbus_cmi_add(struct acpi_device *device) { struct acpi_smbus_cmi *smbus_cmi; + const struct acpi_device_id *id; smbus_cmi = kzalloc(sizeof(struct acpi_smbus_cmi), GFP_KERNEL); if (!smbus_cmi) @@ -362,6 +373,11 @@ static int acpi_smbus_cmi_add(struct acpi_device *device) smbus_cmi->cap_read = 0; smbus_cmi->cap_write = 0; + for (id = acpi_smbus_cmi_ids; id->id[0]; id++) + if (!strcmp(id->id, acpi_device_hid(device))) + smbus_cmi->methods = + (struct smbus_methods_t *) id->driver_data; + acpi_walk_namespace(ACPI_TYPE_METHOD, smbus_cmi->handle, 1, acpi_smbus_cmi_query_methods, NULL, smbus_cmi, NULL); diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c index ccc46418ef7..ffb405d7c6f 100644 --- a/drivers/i2c/busses/i2c-sh_mobile.c +++ b/drivers/i2c/busses/i2c-sh_mobile.c @@ -31,6 +31,7 @@ #include <linux/pm_runtime.h> #include <linux/clk.h> #include <linux/io.h> +#include <linux/slab.h> /* Transmit operation: */ /* */ diff --git a/drivers/i2c/busses/i2c-simtec.c b/drivers/i2c/busses/i2c-simtec.c index 6407f47bda8..78b06107342 100644 --- a/drivers/i2c/busses/i2c-simtec.c +++ b/drivers/i2c/busses/i2c-simtec.c @@ -23,6 +23,7 @@ #include <linux/init.h> #include <linux/delay.h> #include <linux/platform_device.h> +#include <linux/slab.h> #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> diff --git a/drivers/i2c/busses/i2c-stu300.c b/drivers/i2c/busses/i2c-stu300.c index d2728a28a8d..495be451d32 100644 --- a/drivers/i2c/busses/i2c-stu300.c +++ b/drivers/i2c/busses/i2c-stu300.c @@ -16,6 +16,7 @@ #include <linux/interrupt.h> #include <linux/clk.h> #include <linux/io.h> +#include <linux/slab.h> /* the name of this kernel module */ #define NAME "stu300" @@ -497,7 +498,7 @@ static int stu300_set_clk(struct stu300_dev *dev, unsigned long clkrate) int i = 0; /* Locate the apropriate clock setting */ - while (i < ARRAY_SIZE(stu300_clktable) && + while (i < ARRAY_SIZE(stu300_clktable) - 1 && stu300_clktable[i].rate < clkrate) i++; diff --git a/drivers/i2c/busses/i2c-tiny-usb.c b/drivers/i2c/busses/i2c-tiny-usb.c index b5b1bbf37d3..d03b04002f0 100644 --- a/drivers/i2c/busses/i2c-tiny-usb.c +++ b/drivers/i2c/busses/i2c-tiny-usb.c @@ -13,6 +13,7 @@ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/module.h> +#include <linux/slab.h> #include <linux/types.h> /* include interfaces to usb layer */ diff --git a/drivers/i2c/busses/i2c-versatile.c b/drivers/i2c/busses/i2c-versatile.c index 70de8216346..5c473833d94 100644 --- a/drivers/i2c/busses/i2c-versatile.c +++ b/drivers/i2c/busses/i2c-versatile.c @@ -14,6 +14,7 @@ #include <linux/i2c-algo-bit.h> #include <linux/init.h> #include <linux/platform_device.h> +#include <linux/slab.h> #include <asm/io.h> diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c index eece39a5a30..a9c419e075a 100644 --- a/drivers/i2c/busses/i2c-xiic.c +++ b/drivers/i2c/busses/i2c-xiic.c @@ -32,12 +32,14 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/errno.h> +#include <linux/delay.h> #include <linux/platform_device.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/wait.h> #include <linux/i2c-xiic.h> #include <linux/io.h> +#include <linux/slab.h> #define DRIVER_NAME "xiic-i2c" diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c index cf994bd01d9..684395b6f3e 100644 --- a/drivers/i2c/busses/scx200_acb.c +++ b/drivers/i2c/busses/scx200_acb.c @@ -31,6 +31,7 @@ #include <linux/pci.h> #include <linux/delay.h> #include <linux/mutex.h> +#include <linux/slab.h> #include <asm/io.h> #include <linux/scx200.h> diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig deleted file mode 100644 index ae4539d99be..00000000000 --- a/drivers/i2c/chips/Kconfig +++ /dev/null @@ -1,19 +0,0 @@ -# -# Miscellaneous I2C chip drivers configuration -# -# *** DEPRECATED! Do not add new entries! See Makefile *** -# - -menu "Miscellaneous I2C Chip support" - -config SENSORS_TSL2550 - tristate "Taos TSL2550 ambient light sensor" - depends on EXPERIMENTAL - help - If you say yes here you get support for the Taos TSL2550 - ambient light sensor. - - This driver can also be built as a module. If so, the module - will be called tsl2550. - -endmenu diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile deleted file mode 100644 index fe0af0f81f2..00000000000 --- a/drivers/i2c/chips/Makefile +++ /dev/null @@ -1,18 +0,0 @@ -# -# Makefile for miscellaneous I2C chip drivers. -# -# Do not add new drivers to this directory! It is DEPRECATED. -# -# Device drivers are better grouped according to the functionality they -# implement rather than to the bus they are connected to. In particular: -# * Hardware monitoring chip drivers go to drivers/hwmon -# * RTC chip drivers go to drivers/rtc -# * I/O expander drivers go to drivers/gpio -# - -obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o - -ifeq ($(CONFIG_I2C_DEBUG_CHIP),y) -EXTRA_CFLAGS += -DDEBUG -endif - diff --git a/drivers/i2c/chips/tsl2550.c b/drivers/i2c/chips/tsl2550.c deleted file mode 100644 index a0702f36a72..00000000000 --- a/drivers/i2c/chips/tsl2550.c +++ /dev/null @@ -1,473 +0,0 @@ -/* - * tsl2550.c - Linux kernel modules for ambient light sensor - * - * Copyright (C) 2007 Rodolfo Giometti <giometti@linux.it> - * Copyright (C) 2007 Eurotech S.p.A. <info@eurotech.it> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/mutex.h> - -#define TSL2550_DRV_NAME "tsl2550" -#define DRIVER_VERSION "1.2" - -/* - * Defines - */ - -#define TSL2550_POWER_DOWN 0x00 -#define TSL2550_POWER_UP 0x03 -#define TSL2550_STANDARD_RANGE 0x18 -#define TSL2550_EXTENDED_RANGE 0x1d -#define TSL2550_READ_ADC0 0x43 -#define TSL2550_READ_ADC1 0x83 - -/* - * Structs - */ - -struct tsl2550_data { - struct i2c_client *client; - struct mutex update_lock; - - unsigned int power_state : 1; - unsigned int operating_mode : 1; -}; - -/* - * Global data - */ - -static const u8 TSL2550_MODE_RANGE[2] = { - TSL2550_STANDARD_RANGE, TSL2550_EXTENDED_RANGE, -}; - -/* - * Management functions - */ - -static int tsl2550_set_operating_mode(struct i2c_client *client, int mode) -{ - struct tsl2550_data *data = i2c_get_clientdata(client); - - int ret = i2c_smbus_write_byte(client, TSL2550_MODE_RANGE[mode]); - - data->operating_mode = mode; - - return ret; -} - -static int tsl2550_set_power_state(struct i2c_client *client, int state) -{ - struct tsl2550_data *data = i2c_get_clientdata(client); - int ret; - - if (state == 0) - ret = i2c_smbus_write_byte(client, TSL2550_POWER_DOWN); - else { - ret = i2c_smbus_write_byte(client, TSL2550_POWER_UP); - - /* On power up we should reset operating mode also... */ - tsl2550_set_operating_mode(client, data->operating_mode); - } - - data->power_state = state; - - return ret; -} - -static int tsl2550_get_adc_value(struct i2c_client *client, u8 cmd) -{ - int ret; - - ret = i2c_smbus_read_byte_data(client, cmd); - if (ret < 0) - return ret; - if (!(ret & 0x80)) - return -EAGAIN; - return ret & 0x7f; /* remove the "valid" bit */ -} - -/* - * LUX calculation - */ - -#define TSL2550_MAX_LUX 1846 - -static const u8 ratio_lut[] = { - 100, 100, 100, 100, 100, 100, 100, 100, - 100, 100, 100, 100, 100, 100, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 98, 98, 98, 98, 98, - 98, 98, 97, 97, 97, 97, 97, 96, - 96, 96, 96, 95, 95, 95, 94, 94, - 93, 93, 93, 92, 92, 91, 91, 90, - 89, 89, 88, 87, 87, 86, 85, 84, - 83, 82, 81, 80, 79, 78, 77, 75, - 74, 73, 71, 69, 68, 66, 64, 62, - 60, 58, 56, 54, 52, 49, 47, 44, - 42, 41, 40, 40, 39, 39, 38, 38, - 37, 37, 37, 36, 36, 36, 35, 35, - 35, 35, 34, 34, 34, 34, 33, 33, - 33, 33, 32, 32, 32, 32, 32, 31, - 31, 31, 31, 31, 30, 30, 30, 30, - 30, -}; - -static const u16 count_lut[] = { - 0, 1, 2, 3, 4, 5, 6, 7, - 8, 9, 10, 11, 12, 13, 14, 15, - 16, 18, 20, 22, 24, 26, 28, 30, - 32, 34, 36, 38, 40, 42, 44, 46, - 49, 53, 57, 61, 65, 69, 73, 77, - 81, 85, 89, 93, 97, 101, 105, 109, - 115, 123, 131, 139, 147, 155, 163, 171, - 179, 187, 195, 203, 211, 219, 227, 235, - 247, 263, 279, 295, 311, 327, 343, 359, - 375, 391, 407, 423, 439, 455, 471, 487, - 511, 543, 575, 607, 639, 671, 703, 735, - 767, 799, 831, 863, 895, 927, 959, 991, - 1039, 1103, 1167, 1231, 1295, 1359, 1423, 1487, - 1551, 1615, 1679, 1743, 1807, 1871, 1935, 1999, - 2095, 2223, 2351, 2479, 2607, 2735, 2863, 2991, - 3119, 3247, 3375, 3503, 3631, 3759, 3887, 4015, -}; - -/* - * This function is described into Taos TSL2550 Designer's Notebook - * pages 2, 3. - */ -static int tsl2550_calculate_lux(u8 ch0, u8 ch1) -{ - unsigned int lux; - - /* Look up count from channel values */ - u16 c0 = count_lut[ch0]; - u16 c1 = count_lut[ch1]; - - /* - * Calculate ratio. - * Note: the "128" is a scaling factor - */ - u8 r = 128; - - /* Avoid division by 0 and count 1 cannot be greater than count 0 */ - if (c1 <= c0) - if (c0) { - r = c1 * 128 / c0; - - /* Calculate LUX */ - lux = ((c0 - c1) * ratio_lut[r]) / 256; - } else - lux = 0; - else - return -EAGAIN; - - /* LUX range check */ - return lux > TSL2550_MAX_LUX ? TSL2550_MAX_LUX : lux; -} - -/* - * SysFS support - */ - -static ssize_t tsl2550_show_power_state(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct tsl2550_data *data = i2c_get_clientdata(to_i2c_client(dev)); - - return sprintf(buf, "%u\n", data->power_state); -} - -static ssize_t tsl2550_store_power_state(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct tsl2550_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtoul(buf, NULL, 10); - int ret; - - if (val < 0 || val > 1) - return -EINVAL; - - mutex_lock(&data->update_lock); - ret = tsl2550_set_power_state(client, val); - mutex_unlock(&data->update_lock); - - if (ret < 0) - return ret; - - return count; -} - -static DEVICE_ATTR(power_state, S_IWUSR | S_IRUGO, - tsl2550_show_power_state, tsl2550_store_power_state); - -static ssize_t tsl2550_show_operating_mode(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct tsl2550_data *data = i2c_get_clientdata(to_i2c_client(dev)); - - return sprintf(buf, "%u\n", data->operating_mode); -} - -static ssize_t tsl2550_store_operating_mode(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct tsl2550_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtoul(buf, NULL, 10); - int ret; - - if (val < 0 || val > 1) - return -EINVAL; - - if (data->power_state == 0) - return -EBUSY; - - mutex_lock(&data->update_lock); - ret = tsl2550_set_operating_mode(client, val); - mutex_unlock(&data->update_lock); - - if (ret < 0) - return ret; - - return count; -} - -static DEVICE_ATTR(operating_mode, S_IWUSR | S_IRUGO, - tsl2550_show_operating_mode, tsl2550_store_operating_mode); - -static ssize_t __tsl2550_show_lux(struct i2c_client *client, char *buf) -{ - struct tsl2550_data *data = i2c_get_clientdata(client); - u8 ch0, ch1; - int ret; - - ret = tsl2550_get_adc_value(client, TSL2550_READ_ADC0); - if (ret < 0) - return ret; - ch0 = ret; - - ret = tsl2550_get_adc_value(client, TSL2550_READ_ADC1); - if (ret < 0) - return ret; - ch1 = ret; - - /* Do the job */ - ret = tsl2550_calculate_lux(ch0, ch1); - if (ret < 0) - return ret; - if (data->operating_mode == 1) - ret *= 5; - - return sprintf(buf, "%d\n", ret); -} - -static ssize_t tsl2550_show_lux1_input(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - struct tsl2550_data *data = i2c_get_clientdata(client); - int ret; - - /* No LUX data if not operational */ - if (!data->power_state) - return -EBUSY; - - mutex_lock(&data->update_lock); - ret = __tsl2550_show_lux(client, buf); - mutex_unlock(&data->update_lock); - - return ret; -} - -static DEVICE_ATTR(lux1_input, S_IRUGO, - tsl2550_show_lux1_input, NULL); - -static struct attribute *tsl2550_attributes[] = { - &dev_attr_power_state.attr, - &dev_attr_operating_mode.attr, - &dev_attr_lux1_input.attr, - NULL -}; - -static const struct attribute_group tsl2550_attr_group = { - .attrs = tsl2550_attributes, -}; - -/* - * Initialization function - */ - -static int tsl2550_init_client(struct i2c_client *client) -{ - struct tsl2550_data *data = i2c_get_clientdata(client); - int err; - - /* - * Probe the chip. To do so we try to power up the device and then to - * read back the 0x03 code - */ - err = i2c_smbus_read_byte_data(client, TSL2550_POWER_UP); - if (err < 0) - return err; - if (err != TSL2550_POWER_UP) - return -ENODEV; - data->power_state = 1; - - /* Set the default operating mode */ - err = i2c_smbus_write_byte(client, - TSL2550_MODE_RANGE[data->operating_mode]); - if (err < 0) - return err; - - return 0; -} - -/* - * I2C init/probing/exit functions - */ - -static struct i2c_driver tsl2550_driver; -static int __devinit tsl2550_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); - struct tsl2550_data *data; - int *opmode, err = 0; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE - | I2C_FUNC_SMBUS_READ_BYTE_DATA)) { - err = -EIO; - goto exit; - } - - data = kzalloc(sizeof(struct tsl2550_data), GFP_KERNEL); - if (!data) { - err = -ENOMEM; - goto exit; - } - data->client = client; - i2c_set_clientdata(client, data); - - /* Check platform data */ - opmode = client->dev.platform_data; - if (opmode) { - if (*opmode < 0 || *opmode > 1) { - dev_err(&client->dev, "invalid operating_mode (%d)\n", - *opmode); - err = -EINVAL; - goto exit_kfree; - } - data->operating_mode = *opmode; - } else - data->operating_mode = 0; /* default mode is standard */ - dev_info(&client->dev, "%s operating mode\n", - data->operating_mode ? "extended" : "standard"); - - mutex_init(&data->update_lock); - - /* Initialize the TSL2550 chip */ - err = tsl2550_init_client(client); - if (err) - goto exit_kfree; - - /* Register sysfs hooks */ - err = sysfs_create_group(&client->dev.kobj, &tsl2550_attr_group); - if (err) - goto exit_kfree; - - dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION); - - return 0; - -exit_kfree: - kfree(data); -exit: - return err; -} - -static int __devexit tsl2550_remove(struct i2c_client *client) -{ - sysfs_remove_group(&client->dev.kobj, &tsl2550_attr_group); - - /* Power down the device */ - tsl2550_set_power_state(client, 0); - - kfree(i2c_get_clientdata(client)); - - return 0; -} - -#ifdef CONFIG_PM - -static int tsl2550_suspend(struct i2c_client *client, pm_message_t mesg) -{ - return tsl2550_set_power_state(client, 0); -} - -static int tsl2550_resume(struct i2c_client *client) -{ - return tsl2550_set_power_state(client, 1); -} - -#else - -#define tsl2550_suspend NULL -#define tsl2550_resume NULL - -#endif /* CONFIG_PM */ - -static const struct i2c_device_id tsl2550_id[] = { - { "tsl2550", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, tsl2550_id); - -static struct i2c_driver tsl2550_driver = { - .driver = { - .name = TSL2550_DRV_NAME, - .owner = THIS_MODULE, - }, - .suspend = tsl2550_suspend, - .resume = tsl2550_resume, - .probe = tsl2550_probe, - .remove = __devexit_p(tsl2550_remove), - .id_table = tsl2550_id, -}; - -static int __init tsl2550_init(void) -{ - return i2c_add_driver(&tsl2550_driver); -} - -static void __exit tsl2550_exit(void) -{ - i2c_del_driver(&tsl2550_driver); -} - -MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); -MODULE_DESCRIPTION("TSL2550 ambient light sensor driver"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRIVER_VERSION); - -module_init(tsl2550_init); -module_exit(tsl2550_exit); diff --git a/drivers/i2c/i2c-boardinfo.c b/drivers/i2c/i2c-boardinfo.c index a26a34a0664..7e6a63b5716 100644 --- a/drivers/i2c/i2c-boardinfo.c +++ b/drivers/i2c/i2c-boardinfo.c @@ -18,6 +18,7 @@ #include <linux/kernel.h> #include <linux/i2c.h> +#include <linux/slab.h> #include <linux/rwsem.h> #include "i2c-core.h" diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c index 42127822124..a24e0bfe920 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -22,11 +22,11 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/device.h> -#include <linux/semaphore.h> #include <linux/interrupt.h> #include <linux/workqueue.h> #include <linux/i2c.h> #include <linux/i2c-smbus.h> +#include <linux/slab.h> struct i2c_smbus_alert { unsigned int alert_edge_triggered:1; @@ -55,7 +55,7 @@ static int smbus_do_alert(struct device *dev, void *addrp) * Drivers should either disable alerts, or provide at least * a minimal handler. Lock so client->driver won't change. */ - down(&dev->sem); + device_lock(dev); if (client->driver) { if (client->driver->alert) client->driver->alert(client, data->flag); @@ -63,7 +63,7 @@ static int smbus_do_alert(struct device *dev, void *addrp) dev_warn(&client->dev, "no driver alert()!\n"); } else dev_dbg(&client->dev, "alert with no driver\n"); - up(&dev->sem); + device_unlock(dev); /* Stop iterating after we find the device */ return -EBUSY; |