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path: root/drivers/i2c/designware_i2c.h
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2021-09-30WS cleanup: remove SPACE(s) followed by TABWolfgang Denk1-1/+1
Signed-off-by: Wolfgang Denk <wd@denx.de>
2020-12-14dm: treewide: Rename ofdata_to_platdata() to of_to_plat()Simon Glass1-1/+1
This name is far too long. Rename it to remove the 'data' bits. This makes it consistent with the platdata->plat rename. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-07-17i2c: designware_i2c: Support ACPI table generationSimon Glass1-0/+15
Update the PCI driver to generate ACPI information so that Linux has the full information about each I2C bus. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de> Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com> [bmeng: Correct one typo in dw_i2c_gen_speed_config() comments] Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2020-05-19common: Drop linux/bitops.h from common headerSimon Glass1-0/+1
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-03-16i2c: designware_i2c: add 'hs_hcnt' and 'hs_lcnt' for high speedJun Chen1-0/+4
Add support for high speed if scl_sda_cfg exist. Signed-off-by: Jun Chen <ptchentw@gmail.com> Signed-off-by: Jun Chen <jun.chen@vatics.com>
2020-03-16i2c: designware_i2c: remove 'has_high_speed'Jun Chen1-2/+0
Remove 'has_high_speed' config since we can check high speed support from IC_COMP_PARAM_1 register. Signed-off-by: Jun Chen <ptchentw@gmail.com> Signed-off-by: Jun Chen <jun.chen@vatics.com>
2020-03-16i2c: designware_i2c: check is high speed possible supportJun Chen1-0/+3
To read IC_COMP_PARAM_1[3:2] to check is high speed possible, and fall back to fast mode if not. Signed-off-by: Jun Chen <ptchentw@gmail.com> Signed-off-by: Jun Chen <jun.chen@vatics.com>
2020-01-27i2c: designware_i2c: Separate out the speed calculationSimon Glass1-0/+3
We want to be able to calculate the speed separately from actually setting the speed, so we can generate the required ACPI tables. Split out the calculation into its own function. Drop the double underscore on __dw_i2c_set_bus_speed while we are here. That is reserved for compiler internals. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-01-27i2c: designware_i2c: Move dw_i2c_speed_config to headerSimon Glass1-0/+17
This is used to store the speed information for a bus. We want to provide this to ACPI so that it can tell the kernel. Move this struct to the header file so it can be accessed by the ACPI i2c implementation being added later. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-01-27i2c: designware_i2c: Add support for fast-plus speedSimon Glass1-0/+2
Fast-plus runs at 1MHz and is used by some devices. Add support for this. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-01-27i2c: designware_i2c: Update to use standard enums for speedSimon Glass1-13/+0
Update this driver to use the new standard enums for speed. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27i2c: designware_i2c: Add spike supressionSimon Glass1-0/+2
Some versions of this peripheral include a spike-suppression phase of the bus. Add support for this. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27i2c: designware_i2c: Read device-tree propertiesSimon Glass1-0/+15
The i2c controller defines a few timing properties. Read these in and store them for use by the driver. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27i2c: designware_i2c: Use an accurate bus clock instead of MHzSimon Glass1-2/+2
At present the driver uses an approximation for the bus clock, e.g. 166MHz instead of 166 2/3 MHz. This can result in small errors in the resulting I2C speed, perhaps 0.5% or so. Adjust the existing code to start from the accurate figure, even if later rounding reduces this accuracy. Update the bus speed code to work in KHz instead of MHz, which removes most of the error. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27i2c: designware_i2c: Use an enum for selected speed modeSimon Glass1-3/+7
Group these #defines into an enum to make it easier to understand the relationship between them. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jun Chen <ptchentw@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27i2c: designware_i2c: Rename 'max' speed to 'high' speedSimon Glass1-4/+4
Some SoCs support a higher speed than what is currently called 'max' in this driver. Rename it to 'high' speed, which is the official name of the 3.4MHz speed. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jun Chen <ptchentw@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27i2c: designware_i2c: Include clk.h in the header fileSimon Glass1-0/+1
We use struct clk here so really should include this header file to avoid build errors. Also switch the order of clk.h in the C file to match the required code style. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com> Reviewed-by: Jun Chen <ptchentw@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27i2c: designware_i2c: Don't allow changing IC_CLKSimon Glass1-2/+0
If a different input clock is required then the correct way to do this is with a clock driver. Don't allow boards to override IC_CLK. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
2020-01-27i2c: designware_i2c: Add more registersSimon Glass1-1/+13
Some versions of this peripherals provide more control of the bus behaviour. Add definitions for these registers. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com> Reviewed-by: Jun Chen <ptchentw@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de>
2019-12-15i2c: designware: Tidy up PCI supportSimon Glass1-0/+35
This is hacked into the driver at present. It seems better to have it as a separate driver that uses the base driver. Create a new file and put the X86 code into it. Actually the Baytrail settings should really come from the device tree. Note that 'has_max_speed' is added as well. This is currently always false but since only Baytrail provides the config, it does not affect operation for other devices. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini1-2/+1
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2016-04-25i2c: designware_i2c: Add ic_enable_status to ic_regs structStefan Roese1-33/+35
Add the ic_enable_status register to the i2c_regs struct. Additionally the register offsets are added, to better check, if the offset matches the register description in the datasheet. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Cc: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de>
2013-07-24Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk1-17/+1
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2012-12-12designware_i2c.h: Define IC_CLK only if not already defined in config fileArmando Visconti1-0/+2
Signed-off-by: Armando Visconti <armando.visconti@st.com>
2012-12-12designware_i2c.h: Fixed the correct values for SCL low/high timeArmando Visconti1-3/+3
Signed-off-by: Armando Visconti <armando.visconti@st.com>
2012-12-12designware_i2c: Added s/w generation of stop bitArmando Visconti1-0/+1
In the newer versions of designware i2c IP there is the possibility of configuring it with IC_EMPTYFIFO_HOLD_MASTER_EN=1, which basically requires the s/w to generate the stop bit condition directly, as the h/w will not automatically generate it when TX_FIFO is empty. To avoid generation of an extra 0x0 byte sent as data, the IC_STOP command must be sent along with the last IC_CMD. This patch always writes bit[9] of ic_data_cmd even in the older versions, assuming that it is a noop there. Signed-off-by: Armando Visconti <armando.visconti@st.com>
2012-04-24i2c: Add support for designware i2c controllerVipin KUMAR1-0/+146
Earlier, a driver exists in the u-boot source for designware i2c interface. That driver was specific to spear platforms. This patch implements the i2c controller as a generic driver which can be used by multiple platforms The driver files are now renamed to designware_i2c.c and designware_i2c.h and these are moved into drivers/i2c folder for reusability by other platforms Signed-off-by: Vipin Kumar <vipin.kumar@st.com> Signed-off-by: Amit Virdi <amit.virdi@st.com>
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