Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752127AbaBZFJb (ORCPT ); Wed, 26 Feb 2014 00:09:31 -0500 Received: from [216.32.180.30] ([216.32.180.30]:10580 "EHLO va3outboundpool.messaging.microsoft.com" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752064AbaBZFJ2 (ORCPT ); Wed, 26 Feb 2014 00:09:28 -0500 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(zzzz1f42h2148h208ch1ee6h1de0h1fdah2073h2146h1202h1e76h2189h1d1ah1d2ah21bch1fc6hzz1de098h8275bh1de097hz2dh2a8h839he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1b2fh2222h224fh1fb3h1d0ch1d2eh1d3fh1dfeh1dffh1e23h1fe8h1ff5h2218h2216h226dh22d0h24afh2327h2336h2438h2461h2487h24d7h2516h2545h255eh25cch1155h) From: Xiubo Li To: , CC: , , , , , , , , , , , , , Xiubo Li Subject: [PATCH 02/10] ASoC: fsl-utils: Add fsl_asoc_of_xlate_tdm_slot_mask() support. Date: Wed, 26 Feb 2014 11:59:27 +0800 Message-ID: <1393387175-15539-3-git-send-email-Li.Xiubo@freescale.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1393387175-15539-1-git-send-email-Li.Xiubo@freescale.com> References: <1393387175-15539-1-git-send-email-Li.Xiubo@freescale.com> MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: freescale.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% X-FOPE-CONNECTOR: Id%0$Dn%FREESCALE.MAIL.ONMICROSOFT.COM$RO%1$TLS%0$FQDN%$TlsDn% Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch add fsl_asoc_of_xlate_tdm_slot_mask() support for utils. For the some spcified DAI driver, this will be used to generate the TDM slot TX/RX mask. And the TX/RX mask will use a 0 bit for an active slot as default, and the default active bits are at the LSB of the masks. Signed-off-by: Xiubo Li --- sound/soc/fsl/fsl_utils.c | 27 +++++++++++++++++++++++++++ sound/soc/fsl/fsl_utils.h | 4 +++- 2 files changed, 30 insertions(+), 1 deletion(-) diff --git a/sound/soc/fsl/fsl_utils.c b/sound/soc/fsl/fsl_utils.c index b9e42b5..b536eb1 100644 --- a/sound/soc/fsl/fsl_utils.c +++ b/sound/soc/fsl/fsl_utils.c @@ -86,6 +86,33 @@ int fsl_asoc_get_dma_channel(struct device_node *ssi_np, } EXPORT_SYMBOL(fsl_asoc_get_dma_channel); +/** + * fsl_asoc_of_xlate_tdm_slot_mask - generate TDM slot TX/RX mask. + * + * @slots: Number of slots in use. + * @tx_mask: bitmask representing active TX slots. + * @rx_mask: bitmask representing active RX slots. + * + * This function used to generate the TDM slot TX/RX mask. And the TX/RX + * mask will use a 0 bit for an active slot as default, and the default + * active bits are at the LSB of the mask value. + */ +int fsl_asoc_of_xlate_tdm_slot_mask(unsigned int slots, + unsigned int *tx_mask, + unsigned int *rx_mask) +{ + if (!slots) + return -EINVAL; + + if (tx_mask) + *tx_mask = ~((1 << slots) - 1); + if (rx_mask) + *rx_mask = ~((1 << slots) - 1); + + return 0; +} +EXPORT_SYMBOL_GPL(fsl_asoc_of_xlate_tdm_slot_mask); + MODULE_AUTHOR("Timur Tabi "); MODULE_DESCRIPTION("Freescale ASoC utility code"); MODULE_LICENSE("GPL v2"); diff --git a/sound/soc/fsl/fsl_utils.h b/sound/soc/fsl/fsl_utils.h index b295112..01b01f9 100644 --- a/sound/soc/fsl/fsl_utils.h +++ b/sound/soc/fsl/fsl_utils.h @@ -22,5 +22,7 @@ int fsl_asoc_get_dma_channel(struct device_node *ssi_np, const char *name, struct snd_soc_dai_link *dai, unsigned int *dma_channel_id, unsigned int *dma_id); - +int fsl_asoc_of_xlate_tdm_slot_mask(unsigned int slots, + unsigned int *tx_mask, + unsigned int *rx_mask); #endif /* _FSL_UTILS_H */ -- 1.8.4 -- 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/