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* i2c: lpc32xx: fix write timeoutSylvain Lemieux2015-08-17-0/+2
| | | | | | Fix a condition that generate watchdog timeout inside "lpc32xx_i2c_write" when parameters alen = 0 and len = 0. Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
* i2c: lpc32xx: fix read timeoutSylvain Lemieux2015-08-17-5/+5
| | | | | | Fix a condition that generate watchdog timeout inside "lpc32xx_i2c_read" when parameters alen != 0 and len = 0. Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
* i2c: lpc32xx: use api to get hclk instead of fix valueSylvain Lemieux2015-08-17-1/+1
| | | | | | The HCLK is not constant and can take different value; use the api function to get the value of the HCLK for the I2C clock high and low computation. Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
* drivers: hierarchize drivers Kconfig menuMasahiro Yamada2015-08-12-0/+8
| | | | | | | | | | | The menuconfig for drivers are getting more and more cluttered and unreadable because too many entries are displayed in a single flat menu. Use hierarchic menu for each category. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org> [trini: Update to apply again in a few places, drop USB hunk] Signed-off-by: Tom Rini <trini@konsulko.com>
* cros_ec: Support the LDO access method used by springSimon Glass2015-08-05-0/+91
| | | | | | | | | | | | | | | | | | | | | | | Add a driver to support the special LDO access used by spring. This is a custom method in the cros_ec protocol - it does not use an I2C pass-through. There are two implementation choices: 1. Write a special LDO driver which can talk across the EC. Duplicate all the logic from TPS65090 for retrying when the LDO fails to come up. 2. Write a special I2C bus driver which pretends to be a TPS65090 and transfers reads and writes using the LDO message. Either is distasteful. The latter method is chosen since it results in less code duplication and a fairly simple (30-line) implementation of the core logic. The crosec 'ldo' subcommand could be removed (since i2c md/mw will work instead) but is retained as a convenience. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: cros_ec: Convert the I2C tunnel code to use driver modelSimon Glass2015-08-05-0/+53
| | | | | | | | | | | | | | | | | | | The Chrome OS EC supports tunnelling through to an I2C bus on the EC. This currently uses a copy of the I2C command code and a special 'crosec' sub-command. With driver model we can define an I2C bus which tunnels through to the EC, and use the normal 'i2c' command to access it. This simplifies the code and removes some duplication. Add an I2C driver which tunnels through to the EC. Adjust the EC code to support binding child devices so that it can be set up. Adjust the existing I2C xfer function to fit driver model better. For now the old code remains to allow things to still work. It will be removed in a later patch once the new flow is fully enabled. Signed-off-by: Simon Glass <sjg@chromium.org>
* exynos: i2c: Tidy up the driver model codeSimon Glass2015-08-05-36/+103
| | | | | | | | | | | | | | | | | | The existing driver model implementation uses the old non-driver-model code to operate, but has become impossibly tangled as a result. The actual algorithm is quite simple. Also the normal-speed and high-speed buses are quite different and it doesn't seem that useful to put them in the same driver. Finally, there is a bug which breaks communication with the Maxim sound codec and may cause problems with other device. Rewrite the driver model code for normal-speed operation so that it is easier to understand, and fix the bug. Add a TODO to split the drivers. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
* exynos: i2c: Fix code style with ReadWriteByte()Simon Glass2015-08-05-7/+7
| | | | | | | | This function should not use mixed case, and it is simpler to use clrbits_le32() when clearing bits. Fix it. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
* i2c: Add a mux for GPIO-based I2C bus arbitrationSimon Glass2015-08-05-0/+157
| | | | | | | | | | | | | | | | | | | | | | | | While I2C supports multi-master buses this is difficult to get right. The implementation on the master side in software is quite complex. Clock-stretching and the arbitrary time that an I2C transaction can take make it difficult to share the bus fairly in the face of high traffic. When one or more masters can be reset independently part-way through a transaction it is hard to know the state of the bus. This driver provides a scheme based on two 'claim' GPIOs, one driven by the AP (Application Processor, meaning the main CPU) and one driven by the EC (Embedded Controller, a small CPU aimed at handling system tasks). With these they can communicate and reliably share the bus. This scheme has minimal overhead and involves very little code. It is used on snow to permit the EC and the AP to share access to the main system PMIC and battery. The scheme can survive reboots by either side without difficulty. This scheme has been tested in the field with millions of devices. Since U-Boot runs on the AP, the terminology used is 'our' claim GPIO, meaning the AP's, and 'their' claim GPIO, meaning the EC's. This terminology is used by the device tree bindings in Linux also. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: i2c: Add support for multiplexed I2C busesSimon Glass2015-08-05-0/+216
| | | | | | | | | | | | | | | | | Add a new I2C_MUX uclass. Devices in this class can multiplex between several I2C buses, selecting them one at a time for use by the system. The multiplexing mechanism is left to the driver to decide - it may be controlled by GPIOs, for example. The uclass supports only two methods: select() and deselect(). The current mux state is expected to be stored in the mux itself since it is the only thing that knows how to make things work. The mux can record the current state and then avoid switching unless it is necessary. So select() can be skipped if the mux is already in the correct state. Also deselect() can be made a nop if required. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: i2c: Add a function to transfer messagesSimon Glass2015-08-05-0/+11
| | | | | | | | | | | Sometimes it is useful to be able to transfer a raw I2C message. This happens when the chip address needs to be set manually, or when the data to be sent/received is in another buffer. Add a function to provide access to this. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
* dm: i2c: Add a message debug functionSimon Glass2015-08-05-0/+16
| | | | | | | Add a way to dump the contents of an I2C message for debugging purposes. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
* Merge branch 'master' of git://www.denx.de/git/u-boot-imxTom Rini2015-08-02-1/+2
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| * Merge branch 'master' of git://git.denx.de/u-bootStefano Babic2015-07-17-1/+1
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| * | i2c: fix vf610 supportAlbert ARIBAUD \(3ADEV\)2015-07-10-1/+2
| | | | | | | | | | | | | | | | | | | | | Add support in mxc_i2c driver, iomux_v3 and vf610 architecture for the four I2C instances available in VF610. Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
* | | i2c: tegra: Build warning fixes for 64-bitThierry Reding2015-07-27-2/+2
| |/ |/| | | | | | | | | | | | | | | Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
* | exynos: i2c: Correct bug in pinmux selectionSimon Glass2015-07-10-1/+1
|/ | | | | | | | | | | | When driver model is not used the current code does not correctly select the pinmux for the I2C bus. This bug was introduced by this commit: 8dfcbaa dm: i2c: s3c24x0: adjust to dm-i2c api Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de> Reviewed-by: Przemyslaw Marczak <p.marczak@samsung.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* dm: i2c: Add compatibility functions for dm_i2c_reg_read/write()Simon Glass2015-06-10-0/+21
| | | | | | | | Add the legacy i2c_reg_read/write() functions to the compatibility layer so that they can be used when CONFIG_DM_I2C_COMPAT is defined. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
* Merge branch 'master' of git://git.denx.de/u-boot-uniphierTom Rini2015-05-30-11/+7
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| * ARM: UniPhier: update the vendor name of UniPhier in KconfigMasahiro Yamada2015-05-31-3/+3
| | | | | | | | | | | | | | | | | | The business for UniPhier Soc family has been transferred from Panasonic Corporation to Socionext Inc. Update the SoC select menu in Kconfig. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| * ARM: UniPhier: replace <asm/io.h> with <linux/io.h>Masahiro Yamada2015-05-31-8/+4
| | | | | | | | | | | | | | In the Linux coding style, it is recommended to include <linux/io.h> rather than <asm/io.h>. Follow this trend. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* | cosmetic: change Author/MAINTAINER Name from Petermaier to SchmelzerHannes Schmelzer2015-05-28-1/+1
|/ | | | | | | | | | | Since i've been married, i also have a new surname. Mr. Petermaier moved to Mr. Schmelzer. In this patch i update all files in which my (old) name is present. Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com> Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
* Merge branch 'master' of git://www.denx.de/git/u-boot-imxTom Rini2015-05-26-22/+24
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| * i2c, mxc: rework i2c base address names for different SoCsHeiko Schocher2015-05-26-25/+24
| | | | | | | | | | | | | | rework and unify i2c address names for different SoCs, which use the mxc_i2c driver. Signed-off-by: Heiko Schocher <hs@denx.de>
| * arm, imx6, i2c: add I2C4 for MX6DLHeiko Schocher2015-05-26-0/+3
| | | | | | | | | | | | add I2C4 modul for MX6DL based boards. Signed-off-by: Heiko Schocher <hs@denx.de>
* | Merge git://git.denx.de/u-boot-samsungTom Rini2015-05-18-5/+5
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| * i2c: s3c: Implant support for S3C2440Marek Vasut2015-05-06-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | This is a matter of simple additional ifdefery to cater for the different register layout of the S3C2440 chip. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Lukasz Majewski <l.majewski@samsung.com> Cc: Minkyu Kang <mk7.kang@samsung.com> Cc: Vladimir Zapolskiy <vz@mleia.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* | sandbox: i2c: search child emul dev and check its uclass idPrzemyslaw Marczak2015-05-14-3/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function get_emul() in sandbox i2c bus driver, always returns first child as i2c emul device. This may only work for i2c devices with a single child, which is an only i2c emul device. In case when i2c device has more than one child (e.g. PMIC), and one is i2c emul, then the function should search it by check uclass id for each child. This patch add this change to the get_emul(). Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org> Tested on sandbox: Tested-by: Simon Glass <sjg@chromium.org>
* | i2c: mxc: refactor i2c driver and support dmPeng Fan2015-05-14-185/+396
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. Introduce a new structure `struct mxc_i2c_bus`, this structure will used for non-DM and DM. 2. Remove `struct mxc_i2c_regs` structure, but use register offset to access registers based on `base` entry of `struct mxc_i2c_bus`. 3. Remove most `#ifdef I2C_QUIRK_REG`. Using driver_data to contain platform flags. A new flag is introduced, I2C_QUIRK_FLAG. 4. Most functions use `struct mxc_i2c_bus` as one of the parameters. Make most functions common to DM and non-DM, try to avoid duplicated code. 5. Support DM, but pinctrl is not included. Pinmux setting is still set by setup_i2c, but we do not need bus_i2c_init for DM. 6. struct i2c_parms and struct sram_data are removed. 7. Remove bus_i2c_read bus_i2c_write prototype in header file. The frist paramter of bus_i2c_init is modified to i2c index. Add new prototype i2c_idle_bus and force_bus_idle. Since bus_i2c_init is not good for DM I2C and pinctrl is missed, we use a weak function for i2c_idle_bus. Board file take the responsibility to implement this function, like this: " int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus) { if (i2c_bus->index == 0) force_bus_idle(i2c_pads_info0); else if (i2c_bus->index == 1) force_bus_idle(i2c_pads_info1); else xxxxxx } " 8. Introduce a weak function, enable_i2c_clk 9. Tested on an i.MX7 platform. Log info: => dm tree Class Probed Name ---------------------------------------- root [ + ] root_driver simple_bus [ ] |-- soc simple_bus [ ] | |-- aips-bus@30000000 simple_bus [ ] | | |-- anatop@30360000 simple_bus [ ] | | `-- snvs@30370000 simple_bus [ ] | |-- aips-bus@30400000 simple_bus [ ] | `-- aips-bus@30800000 i2c [ ] | |-- i2c@30a20000 i2c [ ] | `-- i2c@30a40000 simple_bus [ ] `-- regulators => i2c dev 0 Setting bus to 0 => i2c probe Valid chip addresses: 08 50 => i2c md 8 31 0031: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 Signed-off-by: Peng Fan <Peng.Fan@freescale.com> Acked-by: Simon Glass <sjg@chromium.org>
* | dm: i2c: Add a function to find out the chip offset lengthSimon Glass2015-05-14-0/+7
| | | | | | | | | | | | | | | | We can currently set this but there is no API function to get it. Add one. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Joe Hershberger <joe.hershberger@ni.com> Acked-by: Heiko Schocher<hs@denx.de>
* | dm: i2c-gpio: Remove redundant dm_gpio_set_value() callAxel Lin2015-05-05-6/+7
| | | | | | | | | | | | | | | | | | dm_gpio_set_dir_flags() will also set gpio output value when switching to gpio output. So it's not necessary to call dm_gpio_set_value() after dm_gpio_set_dir_flags() call. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Simon Glass <sjg@chromium.org>
* | dm: i2c: Add an explicit test mode to the sandbox I2C driverSimon Glass2015-05-05-11/+23
| | | | | | | | | | | | | | | | | | At present this driver has a few test features. They are needed for running the driver model unit tests but are confusing and unnecessary if using sandbox at the command line. Add a flag to enable the test mode, and don't enable it by default. Signed-off-by: Simon Glass <sjg@chromium.org>
* | dm: i2c: Add functions to read and write a registerSimon Glass2015-05-05-0/+19
| | | | | | | | | | | | | | | | Add driver model versions of the legacy functions to read and write a single byte register. These are a useful shortcut in many cases. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
* | dm: i2c: sandbox: Add debugging to the speed limitSimon Glass2015-05-05-1/+3
|/ | | | | | | Print a debug() message with the I2C speed is exceeded. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
* driver/i2c/mxc: Enable I2C bus 3 and 4York Sun2015-04-23-3/+14
| | | | | | | | | Some SoCs have more than two I2C busses. Instead of adding ifdef to the driver, macros are put into board header file where CONFIG_SYS_I2C_MXC is defined. Signed-off-by: York Sun <yorksun@freescale.com> CC: Heiko Schocher <hs@denx.de>
* sandbox: Move CONFIG_SYS_I2C_SANDBOX to KconfigSimon Glass2015-04-18-0/+30
| | | | | | | Move this over to Kconfig and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher<hs@denx.de>
* dm: core: Rename driver data function to dev_get_driver_data()Simon Glass2015-04-18-4/+4
| | | | | | | | | The existing get_get_of_data() function provides access to both the driver's compatible string and its driver data. However only the latter is actually useful. Update the interface to reflect this and fix up existing users. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
* dm: i2c: add i2c-gpio driverPrzemyslaw Marczak2015-04-18-0/+356
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit adds driver model support to software emulated i2c bus driver. This driver supports kernel-style device tree bindings. Fdt properties in use: - compatible - "i2c-gpio" - gpios - data and clock GPIO pin phandles - delay-us - micro seconds delay between GPIOs toggle operations, which is 1/4 of I2C speed clock period. Added: - Config: CONFIG_DM_I2C_GPIO - File: drivers/i2c/i2c-gpio.c - File: doc/device-tree-bindings/i2c/i2c-gpio.txt Driver base code is taken from: drivers/i2c/soft-i2c.c, changes: - use "i2c-gpio" naming - update comments style - move preprocesor macros into functions - add device tree support - add driver model i2c support - code cleanup, - add Kconfig entry Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Added braces in i2c_gpio_xfer() to fix style nit: Signed-off-by: Simon Glass <sjg@chromium.org>
* Kconfig: i2c: fix help message related to dm i2cPrzemyslaw Marczak2015-04-18-10/+7
| | | | | Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org>
* common: Make sure arch-specific map_sysmem() is definedJoe Hershberger2015-04-18-0/+2
| | | | | | | | | | | In the case where the arch defines a custom map_sysmem(), make sure that including just mapmem.h is sufficient to have these functions as they are when the arch does not override it. Also split the non-arch specific functions out of common.h Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* dm: core: Add dev_get_uclass_priv() to access uclass private dataSimon Glass2015-04-16-4/+4
| | | | | | | | Add a convenience function to access the private data that a uclass stores for each of its devices. Convert over most existing uses for consistency and to provide an example for others. Signed-off-by: Simon Glass <sjg@chromium.org>
* i2c: mvtwsi: Support for up to 4 different controllersPaul Kocialkowski2015-04-15-29/+99
| | | | | | | | | | | | Orion5x, Kirkwood and Armada XP platforms come with a single TWSI (I2C) MVTWSI controller. However, other platforms using MVTWSI may come with more: this is the case on Allwinner (sunxi) platforms, where up to 4 controllers can be found on the same chip. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Acked-by: Heiko Schocher <hs@denx.de> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
* lpc32xx: i2c: add LPC32xx I2C interface supportAlbert ARIBAUD \(3ADEV\)2015-04-10-0/+250
| | | | Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
* i2c: mvtwsi: Fix problem with baud rate calculationStefan Roese2015-03-18-8/+9
| | | | | | | | | | | | | | | | | | | | The current implementation for baudrate calculation is incorrect. This part from the formula: "2 ^ (n + 1)" is not equivalent to (1 << n) but to (2 << n)! This patch fixes this and moves this calculation to a function instead of using a macro. This new function is taken from the Linux kernel. This was detected and tested on the Marvell Armada A38x DB-88F6820-GP eval board. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Prafulla Wadaskar <prafulla@marvell.com> Cc: Luka Perkov <luka.perkov@sartura.hr> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Ian Campbell <ijc@hellion.org.uk> Cc: Heiko Schocher <hs@denx.de> Acked-by: Hans de Goede <hdegoede@redhat.com>
* mv_i2c: fix warnings on 64-bit buildsRob Herring2015-03-18-1/+1
| | | | | | | Change addresses to unsigned long to be compatible with 64-bit builds. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Heiko Schocher <hs@denx.de>
* ARM: UniPhier: adjust device trees for business transferMasahiro Yamada2015-03-15-6/+8
| | | | | | | Panasonic's System LSI products, UniPhier SoC family, have been transferred to Socionext Inc. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* dm: i2c: Add a missing memory allocaton checkSimon Glass2015-03-05-0/+2
| | | | | | | This strdup() is missing a check. Add it. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
* dm: Move CONFIG_I2C_COMPAT to KconfigSimon Glass2015-02-19-0/+9
| | | | | | | | | Make this option available in Kconfig and clean up the board that uses it. Note there is also an entry in exynos5-common.h but this affects multiple boards and should be dropped as part of the Samsung I2C migration to driver model. Signed-off-by: Simon Glass <sjg@chromium.org>
* dm: Expand and complete Kconfig in drivers/Simon Glass2015-02-12-2/+10
| | | | | | | | Expand the help messages for each driver. Add missing Kconfig for I2C, SPI flash and thermal. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* dm: i2c: Make API accessible even without CONFIG_DMSimon Glass2015-02-12-16/+16
| | | | | | | | | | | | Make the driver model I2C API available always, even if driver model is not enabled. This allows for a 'soft' switch-over, where drivers can use the new structures in code which is compiled but not yet used. This makes migration easier in some cases. Fix up the existing drivers which define their own 'struct i2c_msg'. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
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