diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/plat-s3c24xx/neo1973_pm_gps.c | 90 |
1 files changed, 48 insertions, 42 deletions
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c index 1a5fdb24a5d..f5052e230fc 100644 --- a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c +++ b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c @@ -303,20 +303,24 @@ static void gps_pwron_set(int on) s3c2410_gpio_cfgpin(S3C2410_GPH4, S3C2410_GPH4_TXD1); /* remove pulldown now it won't be floating any more */ s3c2410_gpio_pullup(S3C2410_GPH5, 0); - } else { - /* - * take care not to power unpowered GPS from UART TX - * return them to GPIO and force low - */ - s3c2410_gpio_cfgpin(S3C2410_GPH4, S3C2410_GPH4_OUTP); - s3c2410_gpio_setpin(S3C2410_GPH4, 0); - /* don't let RX from unpowered GPS float */ - s3c2410_gpio_pullup(S3C2410_GPH5, 1); + + if (!neo1973_gps.power_was_on) + regulator_enable(neo1973_gps.regulator[ + GTA02_GPS_REG_RF_3V]); + return; } - if (on && !neo1973_gps.power_was_on) - regulator_enable(neo1973_gps.regulator[GTA02_GPS_REG_RF_3V]); - else if (!on && neo1973_gps.power_was_on) - regulator_disable(neo1973_gps.regulator[GTA02_GPS_REG_RF_3V]); + + /* + * take care not to power unpowered GPS from UART TX + * return them to GPIO and force low + */ + s3c2410_gpio_cfgpin(S3C2410_GPH4, S3C2410_GPH4_OUTP); + s3c2410_gpio_setpin(S3C2410_GPH4, 0); + /* don't let RX from unpowered GPS float */ + s3c2410_gpio_pullup(S3C2410_GPH5, 1); + if (neo1973_gps.power_was_on) + regulator_disable(neo1973_gps.regulator[ + GTA02_GPS_REG_RF_3V]); } } @@ -695,43 +699,45 @@ static int __init gta01_pm_gps_probe(struct platform_device *pdev) } if (machine_is_neo1973_gta02()) { - switch (system_rev) { - case GTA02v2_SYSTEM_REV: - case GTA02v3_SYSTEM_REV: - case GTA02v4_SYSTEM_REV: - case GTA02v5_SYSTEM_REV: - case GTA02v6_SYSTEM_REV: - neo1973_gps.regulator[GTA02_GPS_REG_RF_3V] = regulator_get( - &pdev->dev, "RF_3V"); - if (IS_ERR(neo1973_gps.regulator)) { - dev_err(&pdev->dev, "probe failed %ld\n", - PTR_ERR(neo1973_gps.regulator)); - return PTR_ERR(neo1973_gps.regulator); - } - - dev_info(&pdev->dev, "FIC Neo1973 GPS Power Managerment:" - "starting\n"); - break; - default: - dev_warn(&pdev->dev, "Unknown GTA02 Revision 0x%x, " - "AGPS PM features not available!!!\n", - system_rev); - return -1; + + neo1973_gps.regulator[GTA02_GPS_REG_RF_3V] = regulator_get( + &pdev->dev, "RF_3V"); + if (IS_ERR(neo1973_gps.regulator)) { + dev_err(&pdev->dev, "probe failed %ld\n", + PTR_ERR(neo1973_gps.regulator)); + + return PTR_ERR(neo1973_gps.regulator); } + dev_info(&pdev->dev, "starting\n"); + + /* + * Here we should call the code that handles the set GPS power + * off action. But, the regulator API does not allow us to + * reassert regulator state, and when we read the regulator API + * logical state, it can differ from the actual state, So + * a workaround for this is to just set the regulator off in the + * PMU directly. Because that's different from normal flow, we + * have to reproduce other things from the OFF action here too. + */ + /* * u-boot enables LDO5 (GPS), which doesn't make sense and * causes confusion. We therefore disable the regulator here. - * - * We don't do this through the regulator API because we'd have - * to second-guess some of its internal logic and make it do - * something that isn't really part of its design. */ - pcf50633_reg_write(gta02_pcf, - PCF50633_REG_LDO5ENA, 0); + pcf50633_reg_write(gta02_pcf, PCF50633_REG_LDO5ENA, 0); + + /* + * take care not to power unpowered GPS from UART TX + * return them to GPIO and force low + */ + s3c2410_gpio_cfgpin(S3C2410_GPH4, S3C2410_GPH4_OUTP); + s3c2410_gpio_setpin(S3C2410_GPH4, 0); + /* don't let RX from unpowered GPS float */ + s3c2410_gpio_pullup(S3C2410_GPH5, 1); return sysfs_create_group(&pdev->dev.kobj, - >a02_gps_attr_group); + >a02_gps_attr_group); } return -1; } |