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git://projects.qi-hardware.com/openwrt-xburst.git
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fc54b9bf15
(stable-branch of Openmoko) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13613 3c298f89-4303-0410-b956-a3cf2f4a3e73
327 lines
10 KiB
Diff
327 lines
10 KiB
Diff
From 8aefbe43a7864e611dca9821daec3e10009e7171 Mon Sep 17 00:00:00 2001
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From: Mike Westerhof <mwester@dls.net>
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Date: Thu, 13 Nov 2008 20:50:55 +0000
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Subject: [PATCH] gta01-battery-driver.patch
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Adds a simple pass-through battery driver module for the GTA01.
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This will simplify user-space by providing the same sysfs API
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on both GTA01 and GTA02, and is a first step towards eliminating
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the need for APM emulation.
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Signed-off-by: Mike Westerhof <mwester@dls.net>
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---
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arch/arm/configs/gta02-moredrivers-defconfig | 1 +
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defconfig-gta01 | 1 +
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defconfig-gta02 | 1 +
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drivers/i2c/chips/pcf50606.c | 96 +++++++++++++++++++++++++
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drivers/power/Kconfig | 6 ++
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drivers/power/Makefile | 1 +
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drivers/power/gta01_battery.c | 97 ++++++++++++++++++++++++++
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7 files changed, 203 insertions(+), 0 deletions(-)
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create mode 100644 drivers/power/gta01_battery.c
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diff --git a/arch/arm/configs/gta02-moredrivers-defconfig b/arch/arm/configs/gta02-moredrivers-defconfig
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index 113eaec..5e1547e 100644
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--- a/arch/arm/configs/gta02-moredrivers-defconfig
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+++ b/arch/arm/configs/gta02-moredrivers-defconfig
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@@ -1060,6 +1060,7 @@ CONFIG_POWER_SUPPLY_DEBUG=y
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CONFIG_PDA_POWER=y
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CONFIG_APM_POWER=y
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# CONFIG_BATTERY_DS2760 is not set
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+# CONFIG_BATTERY_GTA01 is not set
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CONFIG_BATTERY_BQ27000_HDQ=y
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CONFIG_GTA02_HDQ=y
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CONFIG_HWMON=y
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diff --git a/defconfig-gta01 b/defconfig-gta01
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index cecb57f..e2e4330 100644
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--- a/defconfig-gta01
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+++ b/defconfig-gta01
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@@ -1021,6 +1021,7 @@ CONFIG_POWER_SUPPLY=y
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# CONFIG_PDA_POWER is not set
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# CONFIG_APM_POWER is not set
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# CONFIG_BATTERY_DS2760 is not set
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+CONFIG_BATTERY_GTA01=y
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CONFIG_BATTERY_BQ27000_HDQ=y
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CONFIG_GTA02_HDQ=y
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# CONFIG_HWMON is not set
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diff --git a/defconfig-gta02 b/defconfig-gta02
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index 619f7f2..2a6e398 100644
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--- a/defconfig-gta02
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+++ b/defconfig-gta02
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@@ -1021,6 +1021,7 @@ CONFIG_POWER_SUPPLY=y
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# CONFIG_PDA_POWER is not set
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CONFIG_APM_POWER=y
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# CONFIG_BATTERY_DS2760 is not set
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+# CONFIG_BATTERY_GTA01 is not set
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CONFIG_BATTERY_BQ27000_HDQ=y
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CONFIG_GTA02_HDQ=y
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# CONFIG_HWMON is not set
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diff --git a/drivers/i2c/chips/pcf50606.c b/drivers/i2c/chips/pcf50606.c
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index 706ce6d..f585013 100644
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--- a/drivers/i2c/chips/pcf50606.c
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+++ b/drivers/i2c/chips/pcf50606.c
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@@ -50,6 +50,7 @@
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#include <linux/platform_device.h>
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#include <linux/pcf50606.h>
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#include <linux/apm-emulation.h>
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+#include <linux/power_supply.h>
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#include <asm/mach-types.h>
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#include <asm/arch/gta01.h>
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@@ -141,6 +142,12 @@ struct pcf50606_data {
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static struct i2c_driver pcf50606_driver;
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+/* This global is set by the pcf50606 driver to the correct callback
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+ * for the gta01 battery driver. */
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+int (*pmu_bat_get_property)(struct power_supply *, enum power_supply_property,
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+ union power_supply_propval *);
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+EXPORT_SYMBOL(pmu_bat_get_property);
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+
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/* This is an ugly construct on how to access the (currently single/global)
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* pcf50606 handle from other code in the kernel. I didn't really come up with
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* a more decent method of dynamically resolving this */
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@@ -1270,6 +1277,92 @@ static void pcf50606_get_power_status(struct apm_power_info *info)
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}
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/***********************************************************************
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+ * Battery driver interface
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+ ***********************************************************************/
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+static int pcf50606_bat_get_property(struct power_supply *psy,
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+ enum power_supply_property psp,
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+ union power_supply_propval *val)
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+{
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+ u_int16_t adc, adc_adcin1;
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+ u_int8_t mbcc1, chgmod;
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+ struct pcf50606_data *pcf = pcf50606_global;
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+ int ret = 0;
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+
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+ switch (psp) {
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+
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+ case POWER_SUPPLY_PROP_STATUS:
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+ if (!(reg_read(pcf, PCF50606_REG_OOCS) & PCF50606_OOCS_EXTON)) {
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+ /* No charger, clearly we're discharging then */
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+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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+ } else {
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+
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+ /* We have a charger present, get charge mode */
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+ mbcc1 = reg_read(pcf, PCF50606_REG_MBCC1);
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+ chgmod = (mbcc1 & PCF50606_MBCC1_CHGMOD_MASK);
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+ switch (chgmod) {
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+
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+ /* TODO: How to determine POWER_SUPPLY_STATUS_FULL? */
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+
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+ case PCF50606_MBCC1_CHGMOD_QUAL:
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+ case PCF50606_MBCC1_CHGMOD_PRE:
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+ case PCF50606_MBCC1_CHGMOD_IDLE:
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+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
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+ break;
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+
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+ case PCF50606_MBCC1_CHGMOD_TRICKLE:
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+ case PCF50606_MBCC1_CHGMOD_FAST_CCCV:
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+ case PCF50606_MBCC1_CHGMOD_FAST_NOCC:
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+ case PCF50606_MBCC1_CHGMOD_FAST_NOCV:
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+ case PCF50606_MBCC1_CHGMOD_FAST_SW:
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+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
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+ break;
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+
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+ default:
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+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
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+ break;
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+
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+ }
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+ }
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+
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+ case POWER_SUPPLY_PROP_PRESENT:
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+ val->intval = 1; /* Must be, or the magic smoke comes out */
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+ break;
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+
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+ case POWER_SUPPLY_PROP_ONLINE:
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+ val->intval = !!(reg_read(pcf, PCF50606_REG_OOCS) &
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+ PCF50606_OOCS_EXTON);
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+ break;
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+
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+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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+ adc = adc_read(pcf, PCF50606_ADCMUX_BATVOLT_RES, NULL);
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+ /* (adc * 6000000) / 1024 == (adc * 46875) / 8 */
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+ val->intval = (adc * 46875) / 8;
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+ break;
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+
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+ case POWER_SUPPLY_PROP_CURRENT_NOW:
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+ adc = adc_read(pcf, PCF50606_ADCMUX_BATVOLT_ADCIN1,
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+ &adc_adcin1);
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+ val->intval = adc_to_chg_milliamps(pcf, adc_adcin1, adc) * 1000;
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+ break;
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+
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+ case POWER_SUPPLY_PROP_TEMP:
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+ adc = adc_read(pcf, PCF50606_ADCMUX_BATTEMP, NULL);
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+ val->intval = rntc_to_temp(adc_to_rntc(pcf, adc)) * 10;
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+ break;
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+
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+ case POWER_SUPPLY_PROP_CAPACITY:
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+ val->intval = battvolt_scale(pcf50606_battvolt(pcf));
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+ break;
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+
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+ default:
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+ ret = -EINVAL;
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+ break;
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+ }
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+
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+ return ret;
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+}
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+
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+/***********************************************************************
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* RTC
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***********************************************************************/
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@@ -1900,6 +1993,7 @@ static int pcf50606_detect(struct i2c_adapter *adapter, int address, int kind)
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}
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apm_get_power_status = pcf50606_get_power_status;
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+ pmu_bat_get_property = pcf50606_bat_get_property;
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#ifdef CONFIG_MACH_NEO1973_GTA01
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if (machine_is_neo1973_gta01()) {
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@@ -1962,6 +2056,8 @@ static int pcf50606_detach_client(struct i2c_client *client)
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struct pcf50606_data *pcf = i2c_get_clientdata(client);
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apm_get_power_status = NULL;
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+ pmu_bat_get_property = NULL;
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+
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input_unregister_device(pcf->input_dev);
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if (pcf->pdata->used_features & PCF50606_FEAT_PWM_BL)
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diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
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index 8c50ecb..470e08c 100644
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--- a/drivers/power/Kconfig
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+++ b/drivers/power/Kconfig
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@@ -62,5 +62,11 @@ config GTA02_HDQ
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on the Neo Freerunner. You probably want to select
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at least BATTERY_BQ27000_HDQ as well
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+config BATTERY_GTA01
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+ tristate "Neo GTA01 battery"
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+ depends on MACH_NEO1973_GTA01
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+ help
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+ Say Y to enable support for the battery on the Neo GTA01
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+
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endif # POWER_SUPPLY
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diff --git a/drivers/power/Makefile b/drivers/power/Makefile
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index d7e87ad..2013e89 100644
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--- a/drivers/power/Makefile
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+++ b/drivers/power/Makefile
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@@ -21,5 +21,6 @@ obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
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obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
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obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
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obj-$(CONFIG_BATTERY_BQ27000_HDQ) += bq27000_battery.o
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+obj-$(CONFIG_BATTERY_GTA01) += gta01_battery.o
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obj-$(CONFIG_GTA02_HDQ) += gta02_hdq.o
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diff --git a/drivers/power/gta01_battery.c b/drivers/power/gta01_battery.c
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new file mode 100644
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index 0000000..5acb45c
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--- /dev/null
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+++ b/drivers/power/gta01_battery.c
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@@ -0,0 +1,97 @@
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+/*
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+ * Battery driver for the Openmoko GTA01 device, using the pcf50606 chip.
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+ *
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+ * This is nothing more than a write-thru interface to the real logic,
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+ * which is part of the pcf50606.c multifunction chip driver.
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+ * Copyright © 2008 Mike Westerhof <mwester@dls.net>
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+ *
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+ *
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+ * Portions liberally borrowed from olpc_battery.c, copyright below:
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+ * Copyright © 2006 David Woodhouse <dwmw2@infradead.org>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/err.h>
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+#include <linux/platform_device.h>
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+#include <linux/power_supply.h>
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+#include <linux/jiffies.h>
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+#include <linux/sched.h>
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+
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+/*********************************************************************
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+ * This global is set by the pcf50606 driver to the correct callback
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+ *********************************************************************/
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+
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+extern int (*pmu_bat_get_property)(struct power_supply *,
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+ enum power_supply_property,
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+ union power_supply_propval *);
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+
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+
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+/*********************************************************************
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+ * Battery properties
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+ *********************************************************************/
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+static int gta01_bat_get_property(struct power_supply *psy,
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+ enum power_supply_property psp,
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+ union power_supply_propval *val)
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+{
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+ if (pmu_bat_get_property)
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+ return (pmu_bat_get_property)(psy, psp, val);
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+ else
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+ return -ENODEV;
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+}
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+
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+static enum power_supply_property gta01_bat_props[] = {
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+ POWER_SUPPLY_PROP_STATUS,
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+ POWER_SUPPLY_PROP_PRESENT,
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+ POWER_SUPPLY_PROP_ONLINE,
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+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
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+ POWER_SUPPLY_PROP_CURRENT_NOW,
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+ POWER_SUPPLY_PROP_TEMP,
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+ POWER_SUPPLY_PROP_CAPACITY,
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+};
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+
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+/*********************************************************************
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+ * Initialisation
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+ *********************************************************************/
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+
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+static struct platform_device *bat_pdev;
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+
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+static struct power_supply gta01_bat = {
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+ .properties = gta01_bat_props,
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+ .num_properties = ARRAY_SIZE(gta01_bat_props),
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+ .get_property = gta01_bat_get_property,
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+ .use_for_apm = 0, /* pcf50606 driver has its own apm driver */
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+};
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+
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+static int __init gta01_bat_init(void)
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+{
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+ int ret;
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+
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+ bat_pdev = platform_device_register_simple("gta01-battery", 0, NULL, 0);
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+ if (IS_ERR(bat_pdev))
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+ return PTR_ERR(bat_pdev);
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+
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+ gta01_bat.name = bat_pdev->name;
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+
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+ ret = power_supply_register(&bat_pdev->dev, >a01_bat);
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+ if (ret)
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+ platform_device_unregister(bat_pdev);
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+
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+ return ret;
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+}
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+
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+static void __exit gta01_bat_exit(void)
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+{
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+ power_supply_unregister(>a01_bat);
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+ platform_device_unregister(bat_pdev);
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+}
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+
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+module_init(gta01_bat_init);
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+module_exit(gta01_bat_exit);
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+
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+MODULE_AUTHOR("Mike Westerhof <mwester@dls.net>");
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+MODULE_LICENSE("GPL");
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+MODULE_DESCRIPTION("Battery driver for GTA01");
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--
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1.5.6.5
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