From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754191Ab1LISK5 (ORCPT ); Fri, 9 Dec 2011 13:10:57 -0500 Received: from mail-yx0-f174.google.com ([209.85.213.174]:48025 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753466Ab1LISKz (ORCPT ); Fri, 9 Dec 2011 13:10:55 -0500 From: dirk.brandewie@gmail.com To: linux-kernel@vger.kernel.org Cc: cbouatmailru@gmail.com, dg77.kim@samsung.com, kyungmin.park@samsung.com, myungjoo.ham@samsung.com, Jason.Wortham@maxim-ic.com, Dirk Brandewie Subject: [PATCH v2 4/6] max17042: Add SOC support for signalling change in SOC Date: Fri, 9 Dec 2011 10:08:46 -0800 Message-Id: <1323454129-7444-5-git-send-email-dirk.brandewie@gmail.com> X-Mailer: git-send-email 1.7.7.3 In-Reply-To: <1323454129-7444-1-git-send-email-dirk.brandewie@gmail.com> References: <1323454129-7444-1-git-send-email-dirk.brandewie@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dirk Brandewie If platform has the alert pin attached to an interrupt source have the driver signal a change in the SOC every 1 percent. Signed-off-by: Dirk Brandewie --- drivers/power/max17042_battery.c | 57 +++++++++++++++++++++++++++++++++++++- 1 files changed, 56 insertions(+), 1 deletions(-) diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c index 87fef8a..001eca1 100644 --- a/drivers/power/max17042_battery.c +++ b/drivers/power/max17042_battery.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -43,6 +44,11 @@ #define STATUS_SMX_BIT (1 << 14) #define STATUS_BR_BIT (1 << 15) +/* Interrupt mask bits */ +#define CONFIG_ALRT_BIT_ENBL (1 << 2) +#define STATUS_INTR_SOC_BIT (1 << 14) +#define STATUS_INTR_LOW_SOC_BIT (1 << 10) + #define VFSOC0_LOCK 0x0000 #define VFSOC0_UNLOCK 0x0080 #define MODEL_UNLOCK1 0X0059 @@ -528,6 +534,40 @@ static int max17042_init_chip(struct max17042_chip *chip) return 0; } +static void max17042_set_soc_threshold(struct max17042_chip *chip, u16 off) +{ + u16 soc, soc_tr; + + /* program interrupt thesholds such that we should + * get interrupt for every 'off' perc change in the soc + */ + soc = max17042_read_reg(chip->client, MAX17042_RepSOC) >> 8; + soc_tr = (soc + off) << 8; + soc_tr |= (soc - off); + max17042_write_reg(chip->client, MAX17042_SALRT_Th, soc_tr); +} + +static irqreturn_t max17042_intr_handler(int id, void *dev) +{ + return IRQ_WAKE_THREAD; +} + +static irqreturn_t max17042_thread_handler(int id, void *dev) +{ + struct max17042_chip *chip = dev; + u16 val; + + val = max17042_read_reg(chip->client, MAX17042_STATUS); + if ((val & STATUS_INTR_SOC_BIT) || + (val & STATUS_INTR_LOW_SOC_BIT)) { + printk(KERN_ERR "SOC threshold INTR\n"); + dev_info(&chip->client->dev, "SOC threshold INTR\n"); + max17042_set_soc_threshold(chip, 1); + } + + power_supply_changed(&chip->battery); + return IRQ_HANDLED; +} static void max17042_init_worker(struct work_struct *work) { @@ -535,7 +575,7 @@ static void max17042_init_worker(struct work_struct *work) struct max17042_chip, work); struct i2c_client *client = chip->client; int ret; - + u16 reg; /* Initialize registers according to values from the platform data */ if (chip->pdata->init_data) @@ -557,6 +597,21 @@ static void max17042_init_worker(struct work_struct *work) chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR; } + if (client->irq) { + ret = request_threaded_irq(client->irq, max17042_intr_handler, + max17042_thread_handler, + 0, chip->battery.name, chip); + if (!ret) { + reg = max17042_read_reg(client, MAX17042_CONFIG); + reg |= CONFIG_ALRT_BIT_ENBL; + max17042_write_reg(client, MAX17042_CONFIG, reg); + max17042_set_soc_threshold(chip, 1); + } else + dev_err(&client->dev, "%s(): cannot get IRQ\n", + __func__); + + } + chip->init_complete = 1; } -- 1.7.7.3