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2019-03-20i2c: i2c-stm32f7: improve loopback in timing algorithmNicolas Le Bayon1-0/+4
This avoids useless loops inside the I2C timing algorithm. Actually, we support only one possible solution per prescaler value. So after finding a solution with a prescaler, the algorithm can switch directly to the next prescaler value. Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com> Signed-off-by: Bich Hemon <bich.hemon@st.com> Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2019-03-12i2c: i2c-stm32f7: Fix SDADEL minimum formulaNicolas Le Bayon1-1/+1
It conforms with Reference Manual I2C timing section. Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver") Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com> Signed-off-by: Bich Hemon <bich.hemon@st.com> Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-12-01i2c: i2c-stm32f7: add PM Runtime supportPierre-Yves MORDRET1-43/+101
Use PM Runtime API to enable/disable clock Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-11-27i2c: stm32f7: SYSCFG Fast Mode Plus support for I2C STM32F7Pierre-Yves MORDRET1-3/+35
Read SYSCFG bindings to set Fast Mode Plus bits if Fast Mode Plus speed is selected. Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-05-17i2c: stm32f7: fix documentation typoPierre-Yves MORDRET1-3/+4
Some data structure members were either misspelled or missing. Fixes: aeb068c572 ("i2c: i2c-stm32f7: add driver") Fixes: 380b8a85e7 ("i2c: i2c-stm32f7: Add initial SMBus protocols support") Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-04-30i2c: i2c-stm32f7: Implement I2C release mechanismPierre-Yves MORDRET1-3/+24
Feature prevents I2C lock-ups. Mechanism resets I2C state machine and releases SCL/SDA signals but preserves I2C registers. Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-04-30i2c: i2c-stm32f7: Add DMA supportPierre-Yves MORDRET1-20/+194
This patch adds DMA support for i2c-stm32f7 driver Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com> Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-04-30i2c: i2c-stm32f7: Add initial SMBus protocols supportPierre-Yves MORDRET1-9/+368
This patch adds SMBus support for I2C controller embedded in STM32F7 Soc. All SMBus protocols are implemented except SMBus-specific protocols like SMBus Host Notification and SMBus Alert protocols. Implemented: SMBus Quick command, Send byte, Receive byte, Write byte/word, read byte/word, Process call, Block write/read and Block write-block read process call. Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com> Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-04-30i2c: i2c-stm32f7: Add slave supportPierre-Yves MORDRET1-6/+428
This patch adds slave support for I2C controller embedded in STM32F7 SoC Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com> Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-04-30i2c: i2c-stm32f7: Add 10-bit address supportPierre-Yves MORDRET1-5/+17
This patch adds support for 10-bit device address for STM32F7 I2C Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com> Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-03-24i2c: i2c-stm32f7: fix no check on returned setupPierre-Yves MORDRET1-0/+5
Before assigning returned setup structure check if not null Fixes: 463a9215f3ca7600b5ff ("i2c: stm32f7: fix setup structure") Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Acked-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
2017-12-12i2c: stm32: Fix copyrightsBenjamin Gaignard1-1/+2
Uniformize STMicroelectronics copyrights headers and add SPDX identifier. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Acked-by: Alexandre TORGUE <alexandre.torgue@st.com> Acked-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Acked-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-10-05i2c: i2c-stm32f7: make structure stm32f7_setup static constColin Ian King1-1/+1
The structure stm32f7_setup is local to the source and does not need to be in global scope, make it static const. Cleans up sparse warning: symbol 'stm32f7_setup' was not declared. Should it be static? Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-10-05i2c: stm32f7: fix setup structurePierre-Yves MORDRET1-9/+6
I2C drive setup structure is not properly allocated. Make it static instead of pointer to store driver data. Fixes: aeb068c5721485 ("i2c: i2c-stm32f7: add driver") Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-09-14i2c: i2c-stm32f7: add driverPierre-Yves MORDRET1-0/+972
This patch adds initial support for the STM32F7 I2C controller. Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com> Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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