Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752005AbbFYHcL (ORCPT ); Thu, 25 Jun 2015 03:32:11 -0400 Received: from mail-pd0-f174.google.com ([209.85.192.174]:35959 "EHLO mail-pd0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751728AbbFYHb6 (ORCPT ); Thu, 25 Jun 2015 03:31:58 -0400 From: Vaibhav Hiremath To: linux-arm-kernel@lists.infradead.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, lee.jones@linaro.org, robh+dt@kernel.org, yizhang@marvell.com, Vaibhav Hiremath , Zhao Ye Subject: [PATCH-v4 2/3] mfd: 88pm800: Set default interrupt clear method Date: Thu, 25 Jun 2015 12:56:28 +0530 Message-Id: <1435217189-19578-3-git-send-email-vaibhav.hiremath@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1435217189-19578-1-git-send-email-vaibhav.hiremath@linaro.org> References: <1435217189-19578-1-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: 3637 Lines: 111 As per the spec, bit 1 (INT_CLEAR_MODE) of reg addr 0xe (page 0) controls the method of clearing interrupt status of 88pm800 family of devices; 0: clear on read 1: clear on write If pdata is not coming from board file, then set the default irq clear method to "irq clear on write" Also, as suggested by "Lee Jones" renaming variable field to appropriate name. Signed-off-by: Zhao Ye Signed-off-by: Vaibhav Hiremath --- drivers/mfd/88pm800.c | 15 ++++++++++----- include/linux/mfd/88pm80x.h | 6 ++++-- 2 files changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c index 40fd014..e0cd7ad 100644 --- a/drivers/mfd/88pm800.c +++ b/drivers/mfd/88pm800.c @@ -376,7 +376,7 @@ static int device_irq_init_800(struct pm80x_chip *chip) { struct regmap *map = chip->regmap; unsigned long flags = IRQF_ONESHOT; - int data, mask, ret = -EINVAL; + int irq_clr_mode, mask, ret = -EINVAL; if (!map || !chip->irq) { dev_err(chip->dev, "incorrect parameters\n"); @@ -384,15 +384,16 @@ static int device_irq_init_800(struct pm80x_chip *chip) } /* - * irq_mode defines the way of clearing interrupt. it's read-clear by - * default. + * irq_clr_on_wr defines the way of clearing interrupt by + * read/write(0/1). It's read-clear by default. */ mask = PM800_WAKEUP2_INV_INT | PM800_WAKEUP2_INT_CLEAR | PM800_WAKEUP2_INT_MASK; - data = PM800_WAKEUP2_INT_CLEAR; - ret = regmap_update_bits(map, PM800_WAKEUP2, mask, data); + irq_clr_mode = (chip->irq_clr_on_wr) ? + PM800_WAKEUP2_INT_WRITE_CLEAR : PM800_WAKEUP2_INT_READ_CLEAR; + ret = regmap_update_bits(map, PM800_WAKEUP2, mask, irq_clr_mode); if (ret < 0) goto out; @@ -514,6 +515,7 @@ static int device_800_init(struct pm80x_chip *chip, } chip->regmap_irq_chip = &pm800_irq_chip; + chip->irq_clr_on_wr = pdata->irq_clr_on_wr; ret = device_irq_init_800(chip); if (ret < 0) { @@ -566,6 +568,9 @@ static int pm800_probe(struct i2c_client *client, pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; + + /* by default, set irq clear method on write */ + pdata->irq_clr_on_wr = true; } ret = pm80x_init(client); diff --git a/include/linux/mfd/88pm80x.h b/include/linux/mfd/88pm80x.h index 97cb283..94b3dcd 100644 --- a/include/linux/mfd/88pm80x.h +++ b/include/linux/mfd/88pm80x.h @@ -77,6 +77,8 @@ enum { #define PM800_WAKEUP2 (0x0E) #define PM800_WAKEUP2_INV_INT (1 << 0) #define PM800_WAKEUP2_INT_CLEAR (1 << 1) +#define PM800_WAKEUP2_INT_READ_CLEAR (0 << 1) +#define PM800_WAKEUP2_INT_WRITE_CLEAR (1 << 1) #define PM800_WAKEUP2_INT_MASK (1 << 2) #define PM800_POWER_UP_LOG (0x10) @@ -300,7 +302,7 @@ struct pm80x_chip { struct regmap_irq_chip_data *irq_data; int type; int irq; - int irq_mode; + int irq_clr_on_wr; /* '1': Clear on write, '0': Clear on read*/ unsigned long wu_flag; spinlock_t lock; }; @@ -315,7 +317,7 @@ struct pm80x_platform_data { */ struct regulator_init_data *regulators[PM800_ID_RG_MAX]; unsigned int num_regulators; - int irq_mode; /* Clear interrupt by read/write(0/1) */ + int irq_clr_on_wr; /* Clear interrupt by read/write(0/1) */ int batt_det; /* enable/disable */ int (*plat_config)(struct pm80x_chip *chip, struct pm80x_platform_data *pdata); -- 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/