Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754267AbdFNFxW (ORCPT ); Wed, 14 Jun 2017 01:53:22 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:42762 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754072AbdFNFxS (ORCPT ); Wed, 14 Jun 2017 01:53:18 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 6E15660866 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=varada@codeaurora.org From: Varadarajan Narayanan To: broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, andy.gross@linaro.org, david.brown@linaro.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org Cc: Varadarajan Narayanan , Sham Muthayyan Subject: [PATCH 01/18] spi: qup: Enable chip select support Date: Wed, 14 Jun 2017 11:22:14 +0530 Message-Id: <1497419551-21834-2-git-send-email-varada@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1497419551-21834-1-git-send-email-varada@codeaurora.org> References: <1497419551-21834-1-git-send-email-varada@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1519 Lines: 49 Enable chip select support for QUP versions later than v1 Signed-off-by: Sham Muthayyan Signed-off-by: Varadarajan Narayanan --- drivers/spi/spi-qup.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 1bfa889..c0d4def 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -750,6 +750,24 @@ static int spi_qup_init_dma(struct spi_master *master, resource_size_t base) return ret; } +static void spi_qup_set_cs(struct spi_device *spi, bool val) +{ + struct spi_qup *controller; + u32 spi_ioc; + u32 spi_ioc_orig; + + controller = spi_master_get_devdata(spi->master); + spi_ioc = readl_relaxed(controller->base + SPI_IO_CONTROL); + spi_ioc_orig = spi_ioc; + if (!val) + spi_ioc |= SPI_IO_C_FORCE_CS; + else + spi_ioc &= ~SPI_IO_C_FORCE_CS; + + if (spi_ioc != spi_ioc_orig) + writel_relaxed(spi_ioc, controller->base + SPI_IO_CONTROL); +} + static int spi_qup_probe(struct platform_device *pdev) { struct spi_master *master; @@ -846,6 +864,9 @@ static int spi_qup_probe(struct platform_device *pdev) if (of_device_is_compatible(dev->of_node, "qcom,spi-qup-v1.1.1")) controller->qup_v1 = 1; + if (!controller->qup_v1) + master->set_cs = spi_qup_set_cs; + spin_lock_init(&controller->lock); init_completion(&controller->done); -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation