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    SubjectRe: [PATCH v7 4/8] Loongson: YeeLoong: add battery driver
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    Hi, Pavel

    Seems you have reviewed this patch, can I get your Acked-by:?

    Thanks!
    Wu Zhangjin

    On Fri, 2009-12-04 at 21:34 +0800, Wu Zhangjin wrote:
    > From: Wu Zhangjin <wuzhangjin@gmail.com>
    >
    > This patch adds APM emulated Battery Driver, it provides standard
    > interface(/proc/apm) for user-space applications(e.g. kpowersave,
    > gnome-power-manager) to manage the battery.
    >
    > Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
    > ---
    > drivers/platform/mips/Kconfig | 2 +
    > drivers/platform/mips/yeeloong_laptop.c | 104 +++++++++++++++++++++++++++++++
    > 2 files changed, 106 insertions(+), 0 deletions(-)
    >
    > diff --git a/drivers/platform/mips/Kconfig b/drivers/platform/mips/Kconfig
    > index f7a3705..0c6b5ad 100644
    > --- a/drivers/platform/mips/Kconfig
    > +++ b/drivers/platform/mips/Kconfig
    > @@ -18,6 +18,8 @@ config LEMOTE_YEELOONG2F
    > tristate "Lemote YeeLoong Laptop"
    > depends on LEMOTE_MACH2F
    > select BACKLIGHT_CLASS_DEVICE
    > + select SYS_SUPPORTS_APM_EMULATION
    > + select APM_EMULATION
    > default m
    > help
    > YeeLoong netbook is a mini laptop made by Lemote, which is basically
    > diff --git a/drivers/platform/mips/yeeloong_laptop.c b/drivers/platform/mips/yeeloong_laptop.c
    > index fbc4ebb..729e368 100644
    > --- a/drivers/platform/mips/yeeloong_laptop.c
    > +++ b/drivers/platform/mips/yeeloong_laptop.c
    > @@ -13,6 +13,7 @@
    > #include <linux/platform_device.h>
    > #include <linux/backlight.h> /* for backlight subdriver */
    > #include <linux/fb.h>
    > +#include <linux/apm-emulation.h>/* for battery subdriver */
    >
    > #include <ec_kb3310b.h>
    >
    > @@ -83,6 +84,106 @@ static void yeeloong_backlight_exit(void)
    > }
    > }
    >
    > +/* battery subdriver */
    > +
    > +static void get_fixed_battery_info(void)
    > +{
    > + int design_cap, full_charged_cap, design_vol, vendor, cell_count;
    > +
    > + design_cap = (ec_read(REG_BAT_DESIGN_CAP_HIGH) << 8)
    > + | ec_read(REG_BAT_DESIGN_CAP_LOW);
    > + full_charged_cap = (ec_read(REG_BAT_FULLCHG_CAP_HIGH) << 8)
    > + | ec_read(REG_BAT_FULLCHG_CAP_LOW);
    > + design_vol = (ec_read(REG_BAT_DESIGN_VOL_HIGH) << 8)
    > + | ec_read(REG_BAT_DESIGN_VOL_LOW);
    > + vendor = ec_read(REG_BAT_VENDOR);
    > + cell_count = ec_read(REG_BAT_CELL_COUNT);
    > +
    > + if (vendor != 0) {
    > + pr_info("battery vendor(%s), cells count(%d), "
    > + "with designed capacity(%d),designed voltage(%d),"
    > + " full charged capacity(%d)\n",
    > + (vendor ==
    > + FLAG_BAT_VENDOR_SANYO) ? "SANYO" : "SIMPLO",
    > + (cell_count == FLAG_BAT_CELL_3S1P) ? 3 : 6,
    > + design_cap, design_vol,
    > + full_charged_cap);
    > + }
    > +}
    > +
    > +#define APM_CRITICAL 5
    > +
    > +static void get_power_status(struct apm_power_info *info)
    > +{
    > + unsigned char bat_status;
    > +
    > + info->battery_status = APM_BATTERY_STATUS_UNKNOWN;
    > + info->battery_flag = APM_BATTERY_FLAG_UNKNOWN;
    > + info->units = APM_UNITS_MINS;
    > +
    > + info->battery_life = (ec_read(REG_BAT_RELATIVE_CAP_HIGH) << 8) |
    > + (ec_read(REG_BAT_RELATIVE_CAP_LOW));
    > +
    > + info->ac_line_status = (ec_read(REG_BAT_POWER) & BIT_BAT_POWER_ACIN) ?
    > + APM_AC_ONLINE : APM_AC_OFFLINE;
    > +
    > + bat_status = ec_read(REG_BAT_STATUS);
    > +
    > + if (!(bat_status & BIT_BAT_STATUS_IN)) {
    > + /* no battery inserted */
    > + info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
    > + info->battery_flag = APM_BATTERY_FLAG_NOT_PRESENT;
    > + info->time = 0x00;
    > + return;
    > + }
    > +
    > + /* adapter inserted */
    > + if (info->ac_line_status == APM_AC_ONLINE) {
    > + if (!(bat_status & BIT_BAT_STATUS_FULL)) {
    > + /* battery is not fully charged */
    > + info->battery_status = APM_BATTERY_STATUS_CHARGING;
    > + info->battery_flag = APM_BATTERY_FLAG_CHARGING;
    > + } else {
    > + /* battery is fully charged */
    > + info->battery_status = APM_BATTERY_STATUS_HIGH;
    > + info->battery_flag = APM_BATTERY_FLAG_HIGH;
    > + info->battery_life = 100;
    > + }
    > + } else {
    > + /* battery is too low */
    > + if (bat_status & BIT_BAT_STATUS_LOW) {
    > + info->battery_status = APM_BATTERY_STATUS_LOW;
    > + info->battery_flag = APM_BATTERY_FLAG_LOW;
    > + if (info->battery_life <= APM_CRITICAL) {
    > + /* we should power off the system now */
    > + info->battery_status =
    > + APM_BATTERY_STATUS_CRITICAL;
    > + info->battery_flag = APM_BATTERY_FLAG_CRITICAL;
    > + }
    > + } else {
    > + /* assume the battery is high enough. */
    > + info->battery_status = APM_BATTERY_STATUS_HIGH;
    > + info->battery_flag = APM_BATTERY_FLAG_HIGH;
    > + }
    > + }
    > + info->time = ((info->battery_life - 3) * 54 + 142) / 60;
    > +}
    > +
    > +static int yeeloong_battery_init(void)
    > +{
    > + get_fixed_battery_info();
    > +
    > + apm_get_power_status = get_power_status;
    > +
    > + return 0;
    > +}
    > +
    > +static void yeeloong_battery_exit(void)
    > +{
    > + if (apm_get_power_status == get_power_status)
    > + apm_get_power_status = NULL;
    > +}
    > +
    > static struct platform_device_id platform_device_ids[] = {
    > {
    > .name = "yeeloong_laptop",
    > @@ -120,11 +221,14 @@ static int __init yeeloong_init(void)
    > return ret;
    > }
    >
    > + yeeloong_battery_init();
    > +
    > return 0;
    > }
    >
    > static void __exit yeeloong_exit(void)
    > {
    > + yeeloong_battery_exit();
    > yeeloong_backlight_exit();
    > platform_driver_unregister(&platform_driver);
    >




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