Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752990Ab2HGImA (ORCPT ); Tue, 7 Aug 2012 04:42:00 -0400 Received: from db3ehsobe003.messaging.microsoft.com ([213.199.154.141]:6199 "EHLO db3outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752051Ab2HGIlp (ORCPT ); Tue, 7 Aug 2012 04:41:45 -0400 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(zzzz1202hzz8275bhz2dh2a8h668h839hd24he5bhf0ah107ah) From: Zhao Chenhui To: , CC: , Subject: [PATCH 2/4] fsl_pmc: Add API to enable device as wakeup event source Date: Tue, 7 Aug 2012 16:43:24 +0800 Message-ID: <1344329006-10645-2-git-send-email-chenhui.zhao@freescale.com> X-Mailer: git-send-email 1.6.4.1 In-Reply-To: <1344329006-10645-1-git-send-email-chenhui.zhao@freescale.com> References: <1344329006-10645-1-git-send-email-chenhui.zhao@freescale.com> MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: freescale.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4464 Lines: 153 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 | 77 ++++++++++++++++++++++++++++++++++++++++- arch/powerpc/sysdev/fsl_soc.h | 12 ++++++ 2 files changed, 88 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/sysdev/fsl_pmc.c b/arch/powerpc/sysdev/fsl_pmc.c index 45718c5..b6c8c8f 100644 --- a/arch/powerpc/sysdev/fsl_pmc.c +++ b/arch/powerpc/sysdev/fsl_pmc.c @@ -38,6 +38,7 @@ struct pmc_regs { __be32 powmgtcsr; #define POWMGTCSR_SLP 0x00020000 #define POWMGTCSR_DPSLP 0x00100000 +#define POWMGTCSR_LOSSLESS 0x00400000 __be32 res3[2]; /* 0xe008c: Power management clock disable register */ __be32 pmcdr; @@ -48,6 +49,77 @@ static unsigned int pmc_flag; #define PMC_SLEEP 0x1 #define PMC_DEEP_SLEEP 0x2 +#define PMC_LOSSLESS 0x4 + +#define PMCDR_MASK_INIT 0x00e008e0 + +/** + * mpc85xx_pmc_set_wake - enable devices as wakeup event source + * @dev: a 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. + * -ENODEV is returned if PMC is unavailable. + * 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 device *dev, bool enable) +{ + int ret = 0; + struct device_node *clk_np; + const u32 *prop; + u32 pmcdr_mask; + + if (!pmc_regs) { + pr_err("%s: PMC is unavailable\n", __func__); + return -ENODEV; + } + + if (enable && !device_may_wakeup(dev)) + return -EINVAL; + + clk_np = of_parse_phandle(dev->of_node, "fsl,pmc-handle", 0); + if (!clk_np) + return -EINVAL; + + prop = 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) { @@ -123,7 +195,10 @@ 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; + + /* Init the Power Management Clock Disable Register. */ + setbits32(&pmc_regs->pmcdr, PMCDR_MASK_INIT); suspend_set_ops(&pmc_suspend_ops); diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h index 11d9f94..b1510ef 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 +22,17 @@ struct device_node; extern void fsl_rstcr_restart(char *cmd); +#ifdef CONFIG_FSL_PMC +extern int mpc85xx_pmc_set_wake(struct device *dev, bool enable); +extern void mpc85xx_pmc_set_lossless_ethernet(int enable); +#else +static inline int mpc85xx_pmc_set_wake(struct device *dev, bool enable) +{ + return -ENODEV; +} +#define mpc85xx_pmc_set_lossless_ethernet(enable) do { } while (0) +#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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/