From patchwork Mon Jun 15 15:49:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vaibhav Hiremath X-Patchwork-Id: 6610331 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 [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id A18F2C0020 for ; Mon, 15 Jun 2015 16:02:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AB6BF2070E for ; Mon, 15 Jun 2015 16:02:07 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (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 9786320270 for ; Mon, 15 Jun 2015 16:02:06 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Z4Wmj-00048H-KS; Mon, 15 Jun 2015 15:58:53 +0000 Received: from mail-pa0-f42.google.com ([209.85.220.42]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Z4Wi8-00009v-Qz for linux-arm-kernel@lists.infradead.org; Mon, 15 Jun 2015 15:54:09 +0000 Received: by pabqy3 with SMTP id qy3so67907543pab.3 for ; Mon, 15 Jun 2015 08:53:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=xfzOZlvghfGXdz7tBadIrmo4G4fGnVOUgRkN0iFrGlI=; b=AmCUtrEVNXA9s+19jnDs5siIhwrlYX2DpKse5avjh8+o5zgI3GKs2b9oxxs9Jd44kW UEM7B6iuh/+e3eqqDynkiuVAEKI4b02BqkiDsXp3rfAmTesCUMVdFeknscWFRbqEBQEF IKkO0VJZzlLT19pFkjxtOyUsfHwuy0c1FX/IX6Ts750DSE3EPjRm1GVesERs41h75WG4 j8+61Gn4gsTx4SLc5fnkNAxwOsHzbKldJcqu5cFiX14lFMd3zE4tuYK6VmJFGz0lnwtM Zdd/F1en5LFRwtKO1ORZxgTih7T9XO7TlcNqVTiQ0r8tfn2lgXP7SNdaxpnkd4DdxpWY hqhg== X-Gm-Message-State: ALoCoQlPyJZ6iNb9IidIkwPIfOaREqkxZW6fpZg3HFULrEPBb1ALf5BWQLdvu4uFwlrkho64FA1s X-Received: by 10.68.135.136 with SMTP id ps8mr50278772pbb.78.1434383631124; Mon, 15 Jun 2015 08:53:51 -0700 (PDT) Received: from localhost.localdomain ([202.62.77.106]) by mx.google.com with ESMTPSA id fs16sm12662484pdb.12.2015.06.15.08.53.47 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 15 Jun 2015 08:53:49 -0700 (PDT) From: Vaibhav Hiremath To: linux-i2c@vger.kernel.org Subject: [PATCH-V2 10/12] i2c: pxa: Add support for pxa910/988 & new configuration features Date: Mon, 15 Jun 2015 21:19:57 +0530 Message-Id: <1434383399-2370-11-git-send-email-vaibhav.hiremath@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1434383399-2370-1-git-send-email-vaibhav.hiremath@linaro.org> References: <1434383399-2370-1-git-send-email-vaibhav.hiremath@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150615_085408_930735_6E02E2D6 X-CRM114-Status: GOOD ( 15.29 ) X-Spam-Score: -0.7 (/) Cc: wsa@the-dreams.de, Yi Zhang , Vaibhav Hiremath , "Jett.Zhou" , robert.jarzmik@free.fr, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 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=-4.7 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 PXA910 family of devices supports SCLK adjustment through TWSI_ILCR & TWSI_IWCR registers (for all supported modes). This patch also adds these two new register entries to "struct pxa_reg_layout" and "struct pxa_i2c". As discussed in the previous patch-series, the idea here is to add standard DT properties for ilcr and iwcr configuration fields. In case of Master ilcr is used for low/high time and in case of slave mode of operation iwcr is used for setup/hold time. Signed-off-by: Jett.Zhou Signed-off-by: Yi Zhang Signed-off-by: Vaibhav Hiremath --- drivers/i2c/busses/i2c-pxa.c | 42 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index c753411..97f9c7c 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -46,12 +46,15 @@ struct pxa_reg_layout { u32 icr; u32 isr; u32 isar; + u32 ilcr; + u32 iwcr; }; enum pxa_i2c_types { REGS_PXA2XX, REGS_PXA3XX, REGS_CE4100, + REGS_PXA910, }; /* @@ -79,12 +82,22 @@ static struct pxa_reg_layout pxa_reg_layout[] = { .isr = 0x04, /* no isar register */ }, + [REGS_PXA910] = { + .ibmr = 0x00, + .idbr = 0x08, + .icr = 0x10, + .isr = 0x18, + .isar = 0x20, + .ilcr = 0x28, + .iwcr = 0x30, + }, }; static const struct platform_device_id i2c_pxa_id_table[] = { { "pxa2xx-i2c", REGS_PXA2XX }, { "pxa3xx-pwri2c", REGS_PXA3XX }, { "ce4100-i2c", REGS_CE4100 }, + { "pxa910-i2c", REGS_PXA910 }, { }, }; MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table); @@ -124,6 +137,24 @@ MODULE_DEVICE_TABLE(platform, i2c_pxa_id_table); #define ISR_SAD (1 << 9) /* slave address detected */ #define ISR_BED (1 << 10) /* bus error no ACK/NAK */ +/* bit field shift & mask */ +#define ILCR_SLV_SHIFT 0 +#define ILCR_SLV_MASK (0x1FF << ILCR_SLV_SHIFT) +#define ILCR_FLV_SHIFT 9 +#define ILCR_FLV_MASK (0x1FF << ILCR_FLV_SHIFT) +#define ILCR_HLVL_SHIFT 18 +#define ILCR_HLVL_MASK (0x1FF << ILCR_HLVL_SHIFT) +#define ILCR_HLVH_SHIFT 27 +#define ILCR_HLVH_MASK (0x1F << ILCR_HLVH_SHIFT) + +#define IWCR_CNT_SHIFT 0 +#define IWCR_CNT_MASK (0x1F << IWCR_CNT_SHIFT) +#define IWCR_HS_CNT1_SHIFT 5 +#define IWCR_HS_CNT1_MASK (0x1F << IWCR_HS_CNT1_SHIFT) +#define IWCR_HS_CNT2_SHIFT 10 +#define IWCR_HS_CNT2_MASK (0x1F << IWCR_HS_CNT2_SHIFT) + + struct pxa_i2c { spinlock_t lock; wait_queue_head_t wait; @@ -150,6 +181,8 @@ struct pxa_i2c { void __iomem *reg_icr; void __iomem *reg_isr; void __iomem *reg_isar; + void __iomem *reg_ilcr; + void __iomem *reg_iwcr; unsigned long iobase; unsigned long iosize; @@ -169,6 +202,8 @@ struct pxa_i2c { #define _ICR(i2c) ((i2c)->reg_icr) #define _ISR(i2c) ((i2c)->reg_isr) #define _ISAR(i2c) ((i2c)->reg_isar) +#define _ILCR(i2c) ((i2c)->reg_ilcr) +#define _IWCR(i2c) ((i2c)->reg_iwcr) /* * I2C Slave mode address @@ -1141,7 +1176,7 @@ static const struct i2c_algorithm i2c_pxa_pio_algorithm = { static const struct of_device_id i2c_pxa_dt_ids[] = { { .compatible = "mrvl,pxa-i2c", .data = (void *)REGS_PXA2XX }, { .compatible = "mrvl,pwri2c", .data = (void *)REGS_PXA3XX }, - { .compatible = "mrvl,mmp-twsi", .data = (void *)REGS_PXA2XX }, + { .compatible = "mrvl,mmp-twsi", .data = (void *)REGS_PXA910 }, {} }; MODULE_DEVICE_TABLE(of, i2c_pxa_dt_ids); @@ -1255,6 +1290,11 @@ static int i2c_pxa_probe(struct platform_device *dev) if (i2c_type != REGS_CE4100) i2c->reg_isar = i2c->reg_base + pxa_reg_layout[i2c_type].isar; + if (i2c_type == REGS_PXA910) { + i2c->reg_ilcr = i2c->reg_base + pxa_reg_layout[i2c_type].ilcr; + i2c->reg_iwcr = i2c->reg_base + pxa_reg_layout[i2c_type].iwcr; + } + i2c->iobase = res->start; i2c->iosize = resource_size(res);