From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-x22f.google.com (mail-pg0-x22f.google.com [IPv6:2607:f8b0:400e:c05::22f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3tPKnG4B2QzDvnw for ; Thu, 24 Nov 2016 11:28:34 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.b="o+DyuEn4"; dkim-atps=neutral Received: by mail-pg0-x22f.google.com with SMTP id f188so11436894pgc.3 for ; Wed, 23 Nov 2016 16:28:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=35x0NGyYj+gpFe2XxxgZeHjPBb4BHBXEa3s/aCXZuUU=; b=o+DyuEn4puSLiNyHsZhvhfEKlr3NL2R1HJHCz1FLtGzL2oTbfpEYjQBT1v3sIO7AFI 2KnxWE4UrAOoYrZW1AsFjfmzu9LwgxsKaAbmgjQuc449UogfJxv5qhmhZfkrUuTT4ggS 5lP46OtpWHMsOWDT2ce6fb1ZReUm2B7zln1kxDPsp3Ly3ln2PBCEAoQSquJMNHopYm5Y l3nqA/C//rE82yok5BFim4YgCJxBZ81ZKf6kN53Ao09zHp+GTF59uncpq0BeizLbkJNW 7jjUY8hWO3q+xqhMVAMU4hxE3BHQ3hLpdIxDgWp8KAnk8796fMGcEOToats0jc4LZfhe 2F9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=35x0NGyYj+gpFe2XxxgZeHjPBb4BHBXEa3s/aCXZuUU=; b=b0bFEwCulUszczLdgOUbvs2zPidPHKaPFtLGiPQd1h83jkR6zEJElkVOLlMgZIyIN6 hrIVmip2uuSzuu/+M+QB+cLGFGer0kBSB8j+uN7Extm3F24kTE5YMkKPMPEPzw57yQZ1 aeIwKC7zj+/eT84eMnDcDxDLWcv9wgWUbr0dnEGnsqKMiGgILFpF3MegDZwA0k0xUiTu 1/bYY2tFeegaXnpgbvAOSVbUgGNGsORkcRBycNokdlY44FmQ0VDJdg43NH3I06NKs7Rc K2mkaOXIDwU66lZ3cd0tjsYVYMzEUNw5npiEo0t+HOR43JzRvc/sEVD7Gu494xp4XCf2 0A2g== X-Gm-Message-State: AKaTC03xYJKnHhKtruvgA+KKT2SDz8JsNOC5awlk33PPyT2yJXCRg6Tg2eWYIRwUO02UJGJk X-Received: by 10.99.176.14 with SMTP id h14mr9935087pgf.22.1479947312875; Wed, 23 Nov 2016 16:28:32 -0800 (PST) Received: from mxsl.svl.corp.google.com ([100.123.242.80]) by smtp.gmail.com with ESMTPSA id d1sm55255435pfb.76.2016.11.23.16.28.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 23 Nov 2016 16:28:32 -0800 (PST) From: Maxim Sloyko To: sjg@chromium.org Cc: openbmc@lists.ozlabs.org, Maxim Sloyko Subject: [PATCH u-boot v2 5/6] aspeed: Add function to configure pins for I2C devices Date: Wed, 23 Nov 2016 16:28:11 -0800 Message-Id: <1479947292-121635-5-git-send-email-maxims@google.com> X-Mailer: git-send-email 2.8.0.rc3.226.g39d4020 In-Reply-To: <1479947292-121635-1-git-send-email-maxims@google.com> References: <1479858976-139210-1-git-send-email-maxims@google.com> <1479947292-121635-1-git-send-email-maxims@google.com> X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Nov 2016 00:28:35 -0000 In the absence of pinmux driver, I2C driver will be configuring pins directly. Signed-off-by: Maxim Sloyko --- arch/arm/include/asm/arch-aspeed/ast_scu.h | 6 ++++++ arch/arm/mach-aspeed/ast-scu.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/arch/arm/include/asm/arch-aspeed/ast_scu.h b/arch/arm/include/asm/arch-aspeed/ast_scu.h index 6f00e37..5ab28cc 100644 --- a/arch/arm/include/asm/arch-aspeed/ast_scu.h +++ b/arch/arm/include/asm/arch-aspeed/ast_scu.h @@ -49,4 +49,10 @@ extern void ast_scu_init_eth(u8 num); extern void ast_scu_multi_func_eth(u8 num); extern void ast_scu_multi_func_romcs(u8 num); +/* + * Enable I2C controller and pins for a particular device. + * Device numbering starts at 1 + */ +extern void ast_scu_enable_i2c(u8 num); + #endif diff --git a/arch/arm/mach-aspeed/ast-scu.c b/arch/arm/mach-aspeed/ast-scu.c index 87236e2..8232d88 100644 --- a/arch/arm/mach-aspeed/ast-scu.c +++ b/arch/arm/mach-aspeed/ast-scu.c @@ -509,3 +509,31 @@ void ast_scu_get_who_init_dram(void) break; } } + +void ast_scu_enable_i2c(u8 bus_num) +{ + if (bus_num > SCU_I2C_MAX_BUS_NUM) { + debug("%s: bus_num is out of range, must be [%d - %d]\n", + __func__, SCU_I2C_MIN_BUS_NUM, SCU_I2C_MAX_BUS_NUM); + return; + } + + if (bus_num == 0) { + /* Enable I2C Controllers */ + clrbits_le32(AST_SCU_BASE + AST_SCU_RESET, SCU_RESET_I2C); + } else if (bus_num >= 3) { + setbits_le32(AST_SCU_BASE + AST_SCU_FUN_PIN_CTRL5, + SCU_FUN_PIN_I2C(bus_num)); + /* In earlier versions of the SoC these pins are always assigned to + * respective I2C buses and require no configuration. + */ +#ifdef AST_SOC_G5 + } else if (bus_num == 1) { + setbits_le32(AST_SCU_BASE + AST_SCU_FUN_PIN_CTRL8, + SCU_FUN_PIN_SDA1 | SCU_FUN_PIN_SCL1); + } else if (bus_num == 2) { + setbits_le32(AST_SCU_BASE + AST_SCU_FUN_PIN_CTRL8, + SCU_FUN_PIN_SDA2 | SCU_FUN_PIN_SCL2); +#endif + } +} -- 2.8.0.rc3.226.g39d4020