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The Linux DTS sets i2c-scl-falling-time-ns to a value that the\n U-Boot designware_i2c driver cannot consume on Arria 10. Override\n it in the U-Boot SoC dtsi to the maximum value allowed by the HW\n spec so the driver computes correct timings.\n\n 2. The designware_i2c remove() callback disables l4_sp_clk, which is\n shared with several other peripherals on Arria 10/Cyclone V/etc.\n Disabling it on i2c removal corrupts those peripherals. Drop the\n clk_disable() call.\n\n 3. Enable CONFIG_SYS_I2C_DW (which selects DM_I2C) and CONFIG_CMD_I2C\n in socfpga_arria10_defconfig so the driver is actually built and\n exercised by U-Boot's CI.\n\nThe patches originate from the Altera SoCFPGA downstream tree and\nhave been carried internally for several years. Tested on Arria 10\nSoCDK (sdmmc boot variant); SPL/U-Boot build clean. 'make\nsavedefconfig' shows no diff introduced by these patches.\n\nDinesh Maniyam (3):\n arm: dts: a10: Correct i2c scl falling time\n i2c: designware_i2c: Remove clk disabled codes\n configs: socfpga_arria10_defconfig: Enable I2C as default\n\n arch/arm/dts/socfpga_arria10_socdk-u-boot.dtsi | 5 +++++\n configs/socfpga_arria10_defconfig | 2 ++\n drivers/i2c/designware_i2c.c | 4 ----\n 3 files changed, 7 insertions(+), 4 deletions(-)" }