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Received: from twspam01.aspeedtech.com ([211.20.114.71]) by casper.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1krECb-0007UU-T3 for linux-arm-kernel@lists.infradead.org; Mon, 21 Dec 2020 05:57:53 +0000 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 0BL5qWvD013664; Mon, 21 Dec 2020 13:52:36 +0800 (GMT-8) (envelope-from chiawei_wang@aspeedtech.com) Received: from ChiaWeiWang-PC.aspeed.com (192.168.2.66) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 21 Dec 2020 13:56:09 +0800 From: "Chia-Wei, Wang" To: , , , , , , , , , , Subject: [PATCH v3 3/5] ipmi: kcs: aspeed: Adapt to new LPC DTS layout Date: Mon, 21 Dec 2020 13:56:21 +0800 Message-ID: <20201221055623.31463-4-chiawei_wang@aspeedtech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201221055623.31463-1-chiawei_wang@aspeedtech.com> References: <20201221055623.31463-1-chiawei_wang@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.2.66] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 0BL5qWvD013664 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201221_055750_563184_61487954 X-CRM114-Status: GOOD ( 12.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: BMC-SW@aspeedtech.com, cyrilbur@gmail.com, haiyue.wang@linux.intel.com, rlippert@google.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add check against LPC device v2 compatible string to ensure that the fixed device tree layout is adopted. The LPC register offsets are also fixed accordingly. Signed-off-by: Chia-Wei, Wang --- drivers/char/ipmi/kcs_bmc_aspeed.c | 35 ++++++++++++++++++------------ 1 file changed, 21 insertions(+), 14 deletions(-) diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c index a140203c079b..6283bfef4ea7 100644 --- a/drivers/char/ipmi/kcs_bmc_aspeed.c +++ b/drivers/char/ipmi/kcs_bmc_aspeed.c @@ -27,7 +27,6 @@ #define KCS_CHANNEL_MAX 4 -/* mapped to lpc-bmc@0 IO space */ #define LPC_HICR0 0x000 #define LPC_HICR0_LPC3E BIT(7) #define LPC_HICR0_LPC2E BIT(6) @@ -52,15 +51,13 @@ #define LPC_STR1 0x03C #define LPC_STR2 0x040 #define LPC_STR3 0x044 - -/* mapped to lpc-host@80 IO space */ -#define LPC_HICRB 0x080 +#define LPC_HICRB 0x100 #define LPC_HICRB_IBFIF4 BIT(1) #define LPC_HICRB_LPC4E BIT(0) -#define LPC_LADR4 0x090 -#define LPC_IDR4 0x094 -#define LPC_ODR4 0x098 -#define LPC_STR4 0x09C +#define LPC_LADR4 0x110 +#define LPC_IDR4 0x114 +#define LPC_ODR4 0x118 +#define LPC_STR4 0x11C struct aspeed_kcs_bmc { struct regmap *map; @@ -345,15 +342,25 @@ static int aspeed_kcs_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct kcs_bmc *kcs_bmc; - struct device_node *np; + struct device_node *kcs_np; + struct device_node *lpc_np; int rc; - np = pdev->dev.of_node; - if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc") || - of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc")) + kcs_np = dev->of_node; + lpc_np = kcs_np->parent; + + if (!of_device_is_compatible(lpc_np, "aspeed,ast2400-lpc-v2") && + !of_device_is_compatible(lpc_np, "aspeed,ast2500-lpc-v2") && + !of_device_is_compatible(lpc_np, "aspeed,ast2600-lpc-v2")) { + dev_err(dev, "unsupported LPC device binding\n"); + return -ENODEV; + } + + if (of_device_is_compatible(kcs_np, "aspeed,ast2400-kcs-bmc") || + of_device_is_compatible(kcs_np, "aspeed,ast2500-kcs-bmc")) kcs_bmc = aspeed_kcs_probe_of_v1(pdev); - else if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc-v2") || - of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc-v2")) + else if (of_device_is_compatible(kcs_np, "aspeed,ast2400-kcs-bmc-v2") || + of_device_is_compatible(kcs_np, "aspeed,ast2500-kcs-bmc-v2")) kcs_bmc = aspeed_kcs_probe_of_v2(pdev); else return -EINVAL;