From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx> Hello, this patch series splits the SPI/I2C parts for the sc16is7xx driver into separate source files (and separate I2C/SPI drivers). These changes are based on suggestions made by Andy Shevchenko following this discussion: Link: https://lore.kernel.org/all/CAHp75VebCZckUrNraYQj9k=Mrn2kbYs1Lx26f5-8rKJ3RXeh-w@xxxxxxxxxxxxxx/ The patches are multiple, simply to facilitate the review process. In the end, they could be merged into a single patch. This patch series depends on the the following patch (in linux-next/stable): commit f7b487648986 ("lib/find: add atomic find_bit() primitives") I have tested the changes on a custom board with two SC16IS752 DUART over a SPI interface using a Variscite IMX8MN NANO SOM. The four UARTs are configured in RS-485 mode. I did not test the changes on a real SC16is7xx using the I2C interface. But I slighly modified the driver to be able to simulate an I2C device using i2c-stub. I was then able to instantiate a virtual I2C device without disturbing existing connection/communication between real SPI devices on /dev/ttySC0 and /dev/ttySC2 (using a loopback cable). Thank you. Hugo Villeneuve (4): serial: sc16is7xx: simplify and improve Kconfig help text serial: sc16is7xx: split into core and I2C/SPI parts (core) serial: sc16is7xx: split into core and I2C/SPI parts (sc16is7xx_lines) serial: sc16is7xx: split into core and I2C/SPI parts (sc16is7xx_regcfg) drivers/tty/serial/Kconfig | 41 +++-- drivers/tty/serial/Makefile | 4 +- drivers/tty/serial/sc16is7xx.c | 242 ++++++----------------------- drivers/tty/serial/sc16is7xx.h | 41 +++++ drivers/tty/serial/sc16is7xx_i2c.c | 74 +++++++++ drivers/tty/serial/sc16is7xx_spi.c | 97 ++++++++++++ 6 files changed, 279 insertions(+), 220 deletions(-) create mode 100644 drivers/tty/serial/sc16is7xx.h create mode 100644 drivers/tty/serial/sc16is7xx_i2c.c create mode 100644 drivers/tty/serial/sc16is7xx_spi.c base-commit: 52b56990d214c7403b20f691ac61861a37c0f0db -- 2.39.2
