Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755408AbbGFT2Y (ORCPT ); Mon, 6 Jul 2015 15:28:24 -0400 Received: from mail-pd0-f182.google.com ([209.85.192.182]:34432 "EHLO mail-pd0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755342AbbGFT2T (ORCPT ); Mon, 6 Jul 2015 15:28:19 -0400 From: Vaibhav Hiremath To: linux-i2c@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, wsa@the-dreams.de, robert.jarzmik@free.fr, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, Vaibhav Hiremath , "Jett.Zhou" , Yi Zhang Subject: [PATCH-v3 09/11] i2c: pxa: Add support for pxa910/988 & new configuration features Date: Tue, 7 Jul 2015 00:54:53 +0530 Message-Id: <1436210695-19159-10-git-send-email-vaibhav.hiremath@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1436210695-19159-1-git-send-email-vaibhav.hiremath@linaro.org> References: <1436210695-19159-1-git-send-email-vaibhav.hiremath@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4080 Lines: 131 TWSI_ILCR & TWSI_IWCR registers are used to adjust clock rate of standard & fast mode in pxa910/988; so this patch adds these two new 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 dfd1dd0..d5cf6f5 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 @@ -1135,7 +1170,7 @@ 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); @@ -1250,6 +1285,11 @@ 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); -- 1.9.1 -- 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/