{"id":2230039,"url":"http://patchwork.ozlabs.org/api/1.1/covers/2230039/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/cover/cover.1777439293.git.dinesh.maniyam@altera.com/","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/1.1/projects/18/?format=json","name":"U-Boot","link_name":"uboot","list_id":"u-boot.lists.denx.de","list_email":"u-boot@lists.denx.de","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"","date":"2026-04-29T05:11:15","name":"[0/3] arm: socfpga: arria10: Enable and fix I2C support","submitter":{"id":90303,"url":"http://patchwork.ozlabs.org/api/1.1/people/90303/?format=json","name":"Maniyam, Dinesh","email":"dinesh.maniyam@altera.com"},"mbox":"http://patchwork.ozlabs.org/project/uboot/cover/cover.1777439293.git.dinesh.maniyam@altera.com/mbox/","series":[{"id":501984,"url":"http://patchwork.ozlabs.org/api/1.1/series/501984/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/list/?series=501984","date":"2026-04-29T05:11:15","name":"arm: socfpga: arria10: Enable and fix I2C support","version":1,"mbox":"http://patchwork.ozlabs.org/series/501984/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/2230039/comments/","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=altera.com header.i=@altera.com header.a=rsa-sha256\n header.s=selector2 header.b=D+WSScDB;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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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(-)"}