From patchwork Wed Apr 3 13:09:13 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: chenhui zhao X-Patchwork-Id: 233448 X-Patchwork-Delegate: galak@kernel.crashing.org Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id DCC762C0BF4 for ; Thu, 4 Apr 2013 00:11:22 +1100 (EST) Received: from co9outboundpool.messaging.microsoft.com (co9ehsobe001.messaging.microsoft.com [207.46.163.24]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "Microsoft Secure Server Authority" (not verified)) by ozlabs.org (Postfix) with ESMTPS id B03502C0118 for ; Thu, 4 Apr 2013 00:08:26 +1100 (EST) Received: from mail102-co9-R.bigfish.com (10.236.132.227) by CO9EHSOBE030.bigfish.com (10.236.130.93) with Microsoft SMTP Server id 14.1.225.23; Wed, 3 Apr 2013 13:08:22 +0000 Received: from mail102-co9 (localhost [127.0.0.1]) by mail102-co9-R.bigfish.com (Postfix) with ESMTP id 6285334009F for ; Wed, 3 Apr 2013 13:08:22 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1f42h1fc6h1ee6h1de0h1202h1e76h1d1ah1d2ahzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h1354h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1155h) Received: from mail102-co9 (localhost.localdomain [127.0.0.1]) by mail102-co9 (MessageSwitch) id 1364994499939058_23356; Wed, 3 Apr 2013 13:08:19 +0000 (UTC) Received: from CO9EHSMHS029.bigfish.com (unknown [10.236.132.247]) by mail102-co9.bigfish.com (Postfix) with ESMTP id E0F263C0069 for ; Wed, 3 Apr 2013 13:08:19 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CO9EHSMHS029.bigfish.com (10.236.130.39) with Microsoft SMTP Server (TLS) id 14.1.225.23; Wed, 3 Apr 2013 13:08:18 +0000 Received: from tx30smr01.am.freescale.net (10.81.153.31) by 039-SN1MMR1-004.039d.mgd.msft.net (10.84.1.14) with Microsoft SMTP Server (TLS) id 14.2.328.11; Wed, 3 Apr 2013 13:08:18 +0000 Received: from localhost.localdomain ([10.193.20.174]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id r33D87lZ019893; Wed, 3 Apr 2013 06:08:16 -0700 From: Zhao Chenhui To: Subject: [PATCH 05/17] fsl_pmc: Add API to enable device as wakeup event source Date: Wed, 3 Apr 2013 21:09:13 +0800 Message-ID: <1364994565-16010-5-git-send-email-chenhui.zhao@freescale.com> X-Mailer: git-send-email 1.7.3 In-Reply-To: <1364994565-16010-1-git-send-email-chenhui.zhao@freescale.com> References: <1364994565-16010-1-git-send-email-chenhui.zhao@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: chenhui zhao Add APIs for setting wakeup source and lossless Ethernet in low power modes. These APIs can be used by wake-on-packet feature. Signed-off-by: Dave Liu Signed-off-by: Li Yang Signed-off-by: Jin Qing Signed-off-by: Zhao Chenhui --- arch/powerpc/sysdev/fsl_pmc.c | 71 ++++++++++++++++++++++++++++++++++++++++- arch/powerpc/sysdev/fsl_soc.h | 9 +++++ 2 files changed, 79 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/sysdev/fsl_pmc.c b/arch/powerpc/sysdev/fsl_pmc.c index feede7d..ac0250c 100644 --- a/arch/powerpc/sysdev/fsl_pmc.c +++ b/arch/powerpc/sysdev/fsl_pmc.c @@ -34,6 +34,7 @@ struct pmc_regs { __be32 powmgtcsr; #define POWMGTCSR_SLP 0x00020000 #define POWMGTCSR_DPSLP 0x00100000 +#define POWMGTCSR_LOSSLESS 0x00400000 __be32 res3[2]; __be32 pmcdr; }; @@ -43,6 +44,74 @@ static unsigned int pmc_flag; #define PMC_SLEEP 0x1 #define PMC_DEEP_SLEEP 0x2 +#define PMC_LOSSLESS 0x4 + +/** + * mpc85xx_pmc_set_wake - enable devices as wakeup event source + * @pdev: platform device affected + * @enable: True to enable event generation; false to disable + * + * This enables the device as a wakeup event source, or disables it. + * + * RETURN VALUE: + * 0 is returned on success + * -EINVAL is returned if device is not supposed to wake up the system + * Error code depending on the platform is returned if both the platform and + * the native mechanism fail to enable the generation of wake-up events + */ +int mpc85xx_pmc_set_wake(struct platform_device *pdev, bool enable) +{ + int ret = 0; + struct device_node *clk_np; + u32 *prop; + u32 pmcdr_mask; + + if (!pmc_regs) { + pr_err("%s: PMC is unavailable\n", __func__); + return -ENODEV; + } + + if (enable && !device_may_wakeup(&pdev->dev)) + return -EINVAL; + + clk_np = of_parse_phandle(pdev->dev.of_node, "fsl,pmc-handle", 0); + if (!clk_np) + return -EINVAL; + + prop = (u32 *)of_get_property(clk_np, "fsl,pmcdr-mask", NULL); + if (!prop) { + ret = -EINVAL; + goto out; + } + pmcdr_mask = be32_to_cpup(prop); + + if (enable) + /* clear to enable clock in low power mode */ + clrbits32(&pmc_regs->pmcdr, pmcdr_mask); + else + setbits32(&pmc_regs->pmcdr, pmcdr_mask); + +out: + of_node_put(clk_np); + return ret; +} +EXPORT_SYMBOL_GPL(mpc85xx_pmc_set_wake); + +/** + * mpc85xx_pmc_set_lossless_ethernet - enable lossless ethernet + * in (deep) sleep mode + * @enable: True to enable event generation; false to disable + */ +void mpc85xx_pmc_set_lossless_ethernet(int enable) +{ + if (pmc_flag & PMC_LOSSLESS) { + if (enable) + setbits32(&pmc_regs->powmgtcsr, POWMGTCSR_LOSSLESS); + else + clrbits32(&pmc_regs->powmgtcsr, POWMGTCSR_LOSSLESS); + } +} +EXPORT_SYMBOL_GPL(mpc85xx_pmc_set_lossless_ethernet); static int pmc_suspend_enter(suspend_state_t state) { @@ -117,7 +186,7 @@ static int pmc_probe(struct platform_device *pdev) pmc_flag |= PMC_DEEP_SLEEP; if (of_device_is_compatible(np, "fsl,p1022-pmc")) - pmc_flag |= PMC_DEEP_SLEEP; + pmc_flag |= PMC_DEEP_SLEEP | PMC_LOSSLESS; suspend_set_ops(&pmc_suspend_ops); diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h index 949377d..29a87ee 100644 --- a/arch/powerpc/sysdev/fsl_soc.h +++ b/arch/powerpc/sysdev/fsl_soc.h @@ -3,6 +3,7 @@ #ifdef __KERNEL__ #include +#include struct spi_device; @@ -21,6 +22,14 @@ struct device_node; extern void fsl_rstcr_restart(char *cmd); +#ifdef CONFIG_FSL_PMC +int mpc85xx_pmc_set_wake(struct platform_device *pdev, bool enable); +void mpc85xx_pmc_set_lossless_ethernet(int enable); +#else +#define mpc85xx_pmc_set_wake(pdev, enable) +#define mpc85xx_pmc_set_lossless_ethernet(enable) +#endif + #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE) /* The different ports that the DIU can be connected to */