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path: root/drivers/of/of_i2c.c
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2012-11-29of_i2c: Honour "status=disabled" property of deviceAlexander Sverdlin
Currently of_i2c_register_devices() function registers all i2c devices, independently from their status property in device tree. According to "ePAPR 1.1" spec, device should only be registered if there is no "status" property, or it has "ok" (or "okay") value (see of_device_is_available()). In case of "platform devices", of_platform_device_create_pdata() checks for "status" and ensures that disabled devices are not populated. But such check for i2c buses was missing until now. Fix it. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@sysgo.com> Acked-by: Rob Herring <robherring2@gmail.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Reviewed-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-09-07of: i2c: add support for wakeup-source propertyOlof Johansson
Add support for specifying a generic "wakeup-source" property on i2c clients, which will set the I2C_CLIENT_WAKE flag, thus configuring the device to wake the system from suspend (via IRQ). This obviously doesn't make sense on devices lacking IRQ, but since we still allow that in the i2c_board_info case, I don't see a reason to restrict it here. Note: Since the generic i2c bindings aren't documented in the kernel, I didn't find a good place to add documentation for this binding extension. I still think it makes sense to have a generic property instead of having each device do its own binding for the same. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-05-12of/i2c: implement of_find_i2c_adapter_by_nodeStephen Warren
This finds the struct i2c_adapter * for a given device tree node. Just like of_find_i2c_device_by_node. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2012-05-12of/i2c: call i2c_verify_client from of_find_i2c_device_by_nodeStephen Warren
i2c_bus_type may contain both I2C clients and I2C adapters. Fix of_find_i2c_device_by_node to call i2c_verify_client to ensure that it only returns non-NULL of I2C clients. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2010-12-24of/i2c: Fix request module by aliasDavid Daney
If we are registering an i2c device that has a device tree node like this real-world example: rtc@68 { compatible = "dallas,ds1337"; reg = <0x68>; }; of_i2c_register_devices() will try to load a module called ds1337.ko. There is no such module, so it will fail. If we look in modules.alias we will find entries like these: . . . alias i2c:ds1339 rtc_ds1307 alias i2c:ds1338 rtc_ds1307 alias i2c:ds1337 rtc_ds1307 alias i2c:ds1307 rtc_ds1307 alias i2c:ds1374 rtc_ds1374 . . . The module we want is really called rtc_ds1307.ko. If we request a module called "i2c:ds1337", the userspace module loader will do the right thing (unless it is busybox) and load rtc_ds1307.ko. So we add the I2C_MODULE_PREFIX to the request_module() string. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-21of/mips: Cleanup some include directives/files.David Daney
The __init directives should go on the definitions of things, not the declaration, also __init is meaningless for inline functions, so remove it from prom.h. This allows us to get rid of a useless #include, but most of the rest of them are useless too, so kill them as well. If of_i2c.c needs irq definitions, it should include linux/irq.h directly, not assume indirect inclusion via asm/prom.h. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of/i2c: Generalize OF supportGrant Likely
This patch cleans up the i2c OF support code to make it selectable by all architectures and allow for automatic registration of i2c devices. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-05-18of: eliminate of_device->node and dev_archdata->{of,prom}_nodeGrant Likely
This patch eliminates the node pointer from struct of_device and the of_node (or prom_node) pointer from struct dev_archdata since the node pointer is now part of struct device proper when CONFIG_OF is set, and all users of the old pointer locations have already been converted over to use device->of_node. Also remove dev_archdata_{get,set}_node() as it is no longer used by anything. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-05-18of: Always use 'struct device.of_node' to get device node pointer.Grant Likely
The following structure elements duplicate the information in 'struct device.of_node' and so are being eliminated. This patch makes all readers of these elements use device.of_node instead. (struct of_device *)->node (struct dev_archdata *)->prom_node (sparc) (struct dev_archdata *)->of_node (powerpc & microblaze) Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-04-29i2c/of: Allow device node to be passed via i2c_board_infoGrant Likely
The struct device_node *of_node pointer is moving out of dev->archdata and into the struct device proper. of_i2c.c needs to set the of_node pointer before the device is registered. Since the i2c subsystem doesn't allow 2 stage allocation and registration of i2c devices, the of_node pointer needs to be passed via the i2c_board_info structure so that it is set prior to registration. This patch adds of_node to struct i2c_board_info (conditional on CONFIG_OF), sets of_node in i2c_new_device(), and modifies of_i2c.c to use the new parameter. The calling of dev_archdata_set_node() from of_i2c will be removed in a subsequent patch when of_node is removed from archdata and all users are converted over. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-09of: assume big-endian properties, adding conversions where necessaryJeremy Kerr
Properties in the device tree are specified as big-endian. At present, the only platforms to support device trees are also big-endian, so we've been acessing the properties as raw values. We'd like to add device tree support to little-endian platforms too, so add endian conversion to the sites where we access property values in the common of code. Compiled on powerpc (ppc44x_defconfig & ppc64_defconfig) and arm (fdt support only for now). Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2009-01-09drivers/of: Add the of_find_i2c_device_by_node function.Jon Smirl
The of_find_i2c_device_by_node function allows you to follow a reference in the device tree to an i2c device node and then locate the linux device instantiated by the device tree. Example use: an I2S bus driver finding the i2c_device instance for a codec described by a device tree node. This was waiting for Anton's i2c patches that were just added. Signed-off-by: Jon Smirl <jonsmirl@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2008-12-03of/i2c: Fill the archdata for I2C devicesAnton Vorontsov
For I2C devices we just setting the node pointer in the archdata. This is needed so that the I2C devices could find their OF tree nodes. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-10-21of: Format string bug in drivers/of/of_i2c.cJon Smirl
Format string bug. Not exploitable, as this is only writable by root, but worth fixing all the same. See 326f6a5c9c9e1a62aec37bdc0c3f8d53adabe77b Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-26of: adapt of_find_i2c_driver() to be usable by SPI alsoGrant Likely
SPI has a similar problem as I2C in that it needs to determine an appropriate modalias value for each device node. This patch adapts the of_i2c of_find_i2c_driver() function to be usable by of_spi also. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2008-07-22powerpc/mpc5200: Fix wrong 'no interrupt' handling in of_i2cWolfram Sang
If an I2C device node does not specify an interrupt, the .irq member of the board_info struct was set to -1. This caused crashes on following irq_dispose_mappings. Leave it NO_IRQ as returned from irq_of_parse_and_map. (Suggesting -1 as 'i2c-no-irq' used to be a bug in linux/i2c.h.) Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Sean MacLennan <smaclennan@pikatech.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2008-07-12OpenFirmware: Include <linux/of_i2c.h> from of_i2c.c.Robert P. J. Day
drivers/of/of_i2c.c should include <linux/of_i2c.h> for the prototype for of_register_i2c_devices(). Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Acked-by: Jean Delvare <khali@linux-fr.org> Acked-by: Jochen Friedrich <jochen@scram.de> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2008-06-06rtc-ds1374: rename device to just "ds1374"Jean Delvare
Change the name of the device from "rtc-ds1374" to just "ds1374", to match what all other RTC drivers do. I seem to remember that this name was chosen to avoid possible confusion with an older ds1374 driver, but that driver was removed 3 months ago. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Acked-by: Kumar Gala <galak@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-24[POWERPC] drivers/of/of_i2c.c: Add MODULE_LICENSEAdrian Bunk
After commit 585468e5d5962660867c269e26f0a4b89a599473 ([POWERPC] i2c: Fix build breakage introduced by OF helpers) drivers/of/of_i2c.c needs a MODULE_LICENSE. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-04-20[POWERPC] i2c: Fix build breakage introduced by OF helpersJochen Friedrich
Fix build breakage introduced in commit "[POWERPC] i2c: OF helpers for the i2c API". If i2c-core is compiled as a module, the helper needs to be compiled as a module, as well. Rename i2c.c to of_i2c.c to avoid name space conflict. [paulus@samba.org: Changed dependency from OF to PPC_OF to avoid sparc{32,64} allmodconfig breakage.] Signed-off-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Paul Mackerras <paulus@samba.org>