From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ch1outboundpool.messaging.microsoft.com (ch1ehsobe004.messaging.microsoft.com [216.32.181.184]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "Microsoft Secure Server Authority" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id C0BF2B72A2 for ; Thu, 22 Dec 2011 22:43:29 +1100 (EST) Received: from mail143-ch1 (localhost [127.0.0.1]) by mail143-ch1-R.bigfish.com (Postfix) with ESMTP id 46A711C02E8 for ; Thu, 22 Dec 2011 11:43:48 +0000 (UTC) Received: from CH1EHSMHS010.bigfish.com (snatpool1.int.messaging.microsoft.com [10.43.68.247]) by mail143-ch1.bigfish.com (Postfix) with ESMTP id 1BE8E680042 for ; Thu, 22 Dec 2011 11:43:48 +0000 (UTC) From: Zhao Chenhui To: Subject: [PATCH v3 3/4] fsl_pmc: Add API to enable device as wakeup event source Date: Thu, 22 Dec 2011 19:43:33 +0800 Message-ID: <1324554214-19502-3-git-send-email-chenhui.zhao@freescale.com> In-Reply-To: <1324554214-19502-1-git-send-email-chenhui.zhao@freescale.com> References: <1324554214-19502-1-git-send-email-chenhui.zhao@freescale.com> MIME-Version: 1.0 Content-Type: text/plain List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 | 70 ++++++++++++++++++++++++++++++++++++++++- arch/powerpc/sysdev/fsl_soc.h | 9 +++++ 2 files changed, 78 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/sysdev/fsl_pmc.c b/arch/powerpc/sysdev/fsl_pmc.c index 618a52c..0c99591 100644 --- a/arch/powerpc/sysdev/fsl_pmc.c +++ b/arch/powerpc/sysdev/fsl_pmc.c @@ -32,6 +32,7 @@ struct pmc_regs { __be32 powmgtcsr; #define POWMGTCSR_SLP_MASK 0x00020000 #define POWMGTCSR_DPSLP_MASK 0x00100000 +#define POWMGTCSR_LOSSLESS_MASK 0x00400000 __be32 res3[2]; __be32 pmcdr; }; @@ -41,6 +42,73 @@ 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 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, "clk-handle", 0); + if (!clk_np) + return -EINVAL; + + if (of_property_read_u32(clk_np, "fsl,pmcdr-mask", &pmcdr_mask)) { + ret = -EINVAL; + goto out; + } + + 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_MASK); + else + clrbits32(&pmc_regs->powmgtcsr, + POWMGTCSR_LOSSLESS_MASK); + } +} +EXPORT_SYMBOL_GPL(mpc85xx_pmc_set_lossless_ethernet); static int pmc_suspend_enter(suspend_state_t state) { @@ -117,7 +185,7 @@ 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 */ -- 1.6.4.1