From patchwork Tue Aug 27 11:28:49 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Wu X-Patchwork-Id: 2850140 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D851EBF546 for ; Tue, 27 Aug 2013 11:30:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9B0F3201B9 for ; Tue, 27 Aug 2013 11:30:44 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BD8EB20189 for ; Tue, 27 Aug 2013 11:30:39 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VEHTa-000580-HP; Tue, 27 Aug 2013 11:30:22 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VEHTV-0000YF-3z; Tue, 27 Aug 2013 11:30:17 +0000 Received: from newsmtp5.atmel.com ([204.2.163.5] helo=sjogate2.atmel.com) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VEHSz-0000To-Ob for linux-arm-kernel@lists.infradead.org; Tue, 27 Aug 2013 11:29:52 +0000 Received: from localhost.localdomain ([10.217.11.52]) by sjogate2.atmel.com (8.13.6/8.13.6) with ESMTP id r7RBMrBF021976; Tue, 27 Aug 2013 04:23:11 -0700 (PDT) From: Josh Wu To: jic23@cam.ac.uk Subject: [PATCH v3 3/6] iio: at91: Use different prescal, startup mask in MR for different IP Date: Tue, 27 Aug 2013 19:28:49 +0800 Message-Id: <1377602932-1899-4-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1377602932-1899-1-git-send-email-josh.wu@atmel.com> References: <1377602932-1899-1-git-send-email-josh.wu@atmel.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130827_072946_261281_CFEEEB84 X-CRM114-Status: GOOD ( 11.90 ) X-Spam-Score: -4.4 (----) Cc: thomas.petazzoni@free-electrons.com, mark.rutland@arm.com, linux-iio@vger.kernel.org, nicolas.ferre@atmel.com, b.brezillon@overkiz.com, Josh Wu , maxime.ripard@free-electrons.com, plagnioj@jcrosoft.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP For at91 boards, there are different IPs for adc. Different IPs has different STARTUP & PRESCAL mask in ADC_MR. Signed-off-by: Josh Wu Acked-by: Maxime Ripard --- arch/arm/mach-at91/include/mach/at91_adc.h | 7 +++++-- drivers/iio/adc/at91_adc.c | 11 +++++++++-- include/linux/platform_data/at91_adc.h | 4 ++++ 3 files changed, 18 insertions(+), 4 deletions(-) diff --git a/arch/arm/mach-at91/include/mach/at91_adc.h b/arch/arm/mach-at91/include/mach/at91_adc.h index bea1a20..048a57f 100644 --- a/arch/arm/mach-at91/include/mach/at91_adc.h +++ b/arch/arm/mach-at91/include/mach/at91_adc.h @@ -28,9 +28,12 @@ #define AT91_ADC_TRGSEL_EXTERNAL (6 << 1) #define AT91_ADC_LOWRES (1 << 4) /* Low Resolution */ #define AT91_ADC_SLEEP (1 << 5) /* Sleep Mode */ -#define AT91_ADC_PRESCAL (0x3f << 8) /* Prescalar Rate Selection */ +#define AT91_ADC_PRESCAL_9260 (0x3f << 8) /* Prescalar Rate Selection */ +#define AT91_ADC_PRESCAL_9G45 (0xff << 8) #define AT91_ADC_PRESCAL_(x) ((x) << 8) -#define AT91_ADC_STARTUP (0x1f << 16) /* Startup Up Time */ +#define AT91_ADC_STARTUP_9260 (0x1f << 16) /* Startup Up Time */ +#define AT91_ADC_STARTUP_9G45 (0x7f << 16) +#define AT91_ADC_STARTUP_9X5 (0xf << 16) #define AT91_ADC_STARTUP_(x) ((x) << 16) #define AT91_ADC_SHTIM (0xf << 24) /* Sample & Hold Time */ #define AT91_ADC_SHTIM_(x) ((x) << 24) diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c index 49dd751..bccc407 100644 --- a/drivers/iio/adc/at91_adc.c +++ b/drivers/iio/adc/at91_adc.c @@ -678,8 +678,8 @@ static int at91_adc_probe(struct platform_device *pdev) shtim = round_up((st->sample_hold_time * adc_clk_khz / 1000) - 1, 1); - reg = AT91_ADC_PRESCAL_(prsc) & AT91_ADC_PRESCAL; - reg |= AT91_ADC_STARTUP_(ticks) & AT91_ADC_STARTUP; + reg = AT91_ADC_PRESCAL_(prsc) & st->registers->mr_prescal_mask; + reg |= AT91_ADC_STARTUP_(ticks) & st->registers->mr_startup_mask; if (st->low_res) reg |= AT91_ADC_LOWRES; if (st->sleep_mode) @@ -756,6 +756,8 @@ static struct at91_adc_caps at91sam9260_caps = { .drdy_mask = AT91_ADC_DRDY, .status_register = AT91_ADC_SR, .trigger_register = AT91_ADC_TRGR_9260, + .mr_prescal_mask = AT91_ADC_PRESCAL_9260, + .mr_startup_mask = AT91_ADC_STARTUP_9260, }, }; @@ -765,6 +767,8 @@ static struct at91_adc_caps at91sam9g45_caps = { .drdy_mask = AT91_ADC_DRDY, .status_register = AT91_ADC_SR, .trigger_register = AT91_ADC_TRGR_9G45, + .mr_prescal_mask = AT91_ADC_PRESCAL_9G45, + .mr_startup_mask = AT91_ADC_STARTUP_9G45, }, }; @@ -774,6 +778,9 @@ static struct at91_adc_caps at91sam9x5_caps = { .drdy_mask = AT91_ADC_SR_DRDY_9X5, .status_register = AT91_ADC_SR_9X5, .trigger_register = AT91_ADC_TRGR_9X5, + /* prescal mask is same as 9G45 */ + .mr_prescal_mask = AT91_ADC_PRESCAL_9G45, + .mr_startup_mask = AT91_ADC_STARTUP_9X5, }, }; diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h index e15745b..b3ca1e9 100644 --- a/include/linux/platform_data/at91_adc.h +++ b/include/linux/platform_data/at91_adc.h @@ -14,12 +14,16 @@ (Interruptions registers mostly) * @status_register: Offset of the Interrupt Status Register * @trigger_register: Offset of the Trigger setup register + * @mr_prescal_mask: Mask of the PRESCAL field in the adc MR register + * @mr_startup_mask: Mask of the STARTUP field in the adc MR register */ struct at91_adc_reg_desc { u8 channel_base; u32 drdy_mask; u8 status_register; u8 trigger_register; + u32 mr_prescal_mask; + u32 mr_startup_mask; }; /**