From patchwork Wed Mar 5 17:35:33 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Belloni X-Patchwork-Id: 3778351 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id AD9429F383 for ; Wed, 5 Mar 2014 18:20:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C798C20225 for ; Wed, 5 Mar 2014 18:20:05 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A201A20203 for ; Wed, 5 Mar 2014 18:20:04 +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 1WLFmQ-0008RV-BX; Wed, 05 Mar 2014 17:38:56 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WLFlY-0001X2-KB; Wed, 05 Mar 2014 17:38:00 +0000 Received: from top.free-electrons.com ([176.31.233.9] helo=mail.free-electrons.com) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WLFk9-0001Il-BA for linux-arm-kernel@lists.infradead.org; Wed, 05 Mar 2014 17:36:43 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 7990AFB1; Wed, 5 Mar 2014 18:35:59 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Status: No, score=-1.2 required=5.0 tests=BAYES_00,KHOP_BIG_TO_CC, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=no version=3.3.1 Received: from localhost (128-79-216-6.hfc.dyn.abo.bbox.fr [128.79.216.6]) by mail.free-electrons.com (Postfix) with ESMTPSA id 27C4A8A0; Wed, 5 Mar 2014 18:35:59 +0100 (CET) From: Alexandre Belloni To: Nicolas Ferre , Jonathan Cameron , Dmitry Torokhov Subject: [PATCH 08/15] ARM: at91: sam9rl: add at91_adc to support adc and touchscreen Date: Wed, 5 Mar 2014 18:35:33 +0100 Message-Id: <1394040940-18246-9-git-send-email-alexandre.belloni@free-electrons.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1394040940-18246-1-git-send-email-alexandre.belloni@free-electrons.com> References: <1394040940-18246-1-git-send-email-alexandre.belloni@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140305_123634_417198_6B9751D8 X-CRM114-Status: GOOD ( 14.44 ) X-Spam-Score: 1.8 (+) Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Alexandre Belloni , linux-input@vger.kernel.org, Gregory Clement , Maxime Ripard , Jean-Christophe Plagniol-Villard , 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-Level: * X-Virus-Scanned: ClamAV using ClamSMTP The ADC clock needs to be defined to enable the at91_adc driver. It is defined to the same speed that is used for atmel_tsadcc. Signed-off-by: Alexandre Belloni --- arch/arm/mach-at91/at91sam9rl.c | 7 +++ arch/arm/mach-at91/at91sam9rl_devices.c | 85 +++++++++++++++++++++++++++++++++ 2 files changed, 92 insertions(+) diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c index 3651517abedf..753ba4893836 100644 --- a/arch/arm/mach-at91/at91sam9rl.c +++ b/arch/arm/mach-at91/at91sam9rl.c @@ -151,6 +151,11 @@ static struct clk ac97_clk = { .pmc_mask = 1 << AT91SAM9RL_ID_AC97C, .type = CLK_TYPE_PERIPHERAL, }; +static struct clk adc_op_clk = { + .name = "adc_op_clk", + .type = CLK_TYPE_PERIPHERAL, + .rate_hz = 1000000, +}; static struct clk *periph_clocks[] __initdata = { &pioA_clk, @@ -176,6 +181,7 @@ static struct clk *periph_clocks[] __initdata = { &udphs_clk, &lcdc_clk, &ac97_clk, + &adc_op_clk, // irq0 }; @@ -196,6 +202,7 @@ static struct clk_lookup periph_clocks_lookups[] = { CLKDEV_CON_ID("pioB", &pioB_clk), CLKDEV_CON_ID("pioC", &pioC_clk), CLKDEV_CON_ID("pioD", &pioD_clk), + CLKDEV_CON_ID("adc_clk", &tsc_clk), }; static struct clk_lookup usart_clocks_lookups[] = { diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c index a698bdab2cce..b836dada942c 100644 --- a/arch/arm/mach-at91/at91sam9rl_devices.c +++ b/arch/arm/mach-at91/at91sam9rl_devices.c @@ -22,6 +22,7 @@ #include #include #include +#include #include "board.h" #include "generic.h" @@ -656,6 +657,90 @@ void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data) void __init at91_add_device_tsadcc(struct at91_tsadcc_data *data) {} #endif +/* -------------------------------------------------------------------- + * ADC and Touchscreen + * -------------------------------------------------------------------- */ + +#if IS_ENABLED(CONFIG_AT91_ADC) +static struct at91_adc_data adc_data; + +static struct resource adc_resources[] = { + [0] = { + .start = AT91SAM9RL_BASE_TSC, + .end = AT91SAM9RL_BASE_TSC + SZ_16K - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = NR_IRQS_LEGACY + AT91SAM9RL_ID_TSC, + .end = NR_IRQS_LEGACY + AT91SAM9RL_ID_TSC, + .flags = IORESOURCE_IRQ, + } +}; + +static struct platform_device at91_adc_device = { + .name = "at91sam9rl-adc", + .id = -1, + .dev = { + .platform_data = &adc_data, + }, + .resource = adc_resources, + .num_resources = ARRAY_SIZE(adc_resources), +}; + +static struct at91_adc_trigger at91_adc_triggers[] = { + [0] = { + .name = "external-rising", + .value = 1, + .is_external = true, + }, + [1] = { + .name = "external-falling", + .value = 2, + .is_external = true, + }, + [2] = { + .name = "external-any", + .value = 3, + .is_external = true, + }, + [3] = { + .name = "continuous", + .value = 6, + .is_external = false, + }, +}; + +void __init at91_add_device_adc(struct at91_adc_data *data) +{ + if (!data) + return; + + if (test_bit(0, &data->channels_used)) + at91_set_A_periph(AT91_PIN_PA17, 0); + if (test_bit(1, &data->channels_used)) + at91_set_A_periph(AT91_PIN_PA18, 0); + if (test_bit(2, &data->channels_used)) + at91_set_A_periph(AT91_PIN_PA19, 0); + if (test_bit(3, &data->channels_used)) + at91_set_A_periph(AT91_PIN_PA20, 0); + if (test_bit(4, &data->channels_used)) + at91_set_A_periph(AT91_PIN_PD6, 0); + if (test_bit(5, &data->channels_used)) + at91_set_A_periph(AT91_PIN_PD7, 0); + + if (data->use_external_triggers) + at91_set_A_periph(AT91_PIN_PB15, 0); + + data->startup_time = 40; + data->trigger_number = 4; + data->trigger_list = at91_adc_triggers; + + adc_data = *data; + platform_device_register(&at91_adc_device); +} +#else +void __init at91_add_device_adc(struct at91_adc_data *data) {} +#endif /* -------------------------------------------------------------------- * RTC