Subject: + drivers-rtc-rtc-palmasc-support-for-backup-battery-charging.patch added to -mm tree To: ldewangan@xxxxxxxxxx,balbi@xxxxxx From: akpm@xxxxxxxxxxxxxxxxxxxx Date: Thu, 08 Aug 2013 15:01:49 -0700 The patch titled Subject: drivers/rtc/rtc-palmas.c: support for backup battery charging has been added to the -mm tree. Its filename is drivers-rtc-rtc-palmasc-support-for-backup-battery-charging.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/drivers-rtc-rtc-palmasc-support-for-backup-battery-charging.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/drivers-rtc-rtc-palmasc-support-for-backup-battery-charging.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Laxman Dewangan <ldewangan@xxxxxxxxxx> Subject: drivers/rtc/rtc-palmas.c: support for backup battery charging Palmas series device like TPS65913, TPS80036 supports the backup battery for powering the RTC when no other energy source is available. The backup battery is optional, connected to the VBACKUP pin, and can be nonrechargeable or rechargeable. The rechargeable battery can be charged from the system supply using the backup battery charger. Add support for enabling charging of this backup battery. Also add the DT binding document and the new properties to have this support. Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx> Reviewed-by: Felipe Balbi <balbi@xxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/devicetree/bindings/rtc/rtc-palmas.txt | 29 ++++++++ drivers/rtc/rtc-palmas.c | 35 ++++++++++ 2 files changed, 64 insertions(+) diff -puN /dev/null Documentation/devicetree/bindings/rtc/rtc-palmas.txt --- /dev/null +++ a/Documentation/devicetree/bindings/rtc/rtc-palmas.txt @@ -0,0 +1,29 @@ +Palmas RTC controller bindings + +Required properties: +- compatible: + - "ti,palmas-rtc" for palma series of the RTC controller +- interrupt-parent: Parent interrupt device, must be handle of palmas node. +- interrupts: Interrupt number of RTC submodule on device. + +Optional properties: +- ti,back-battery-charge-enable: The palmas series device like TPS65913 or + TPS80036 supports the battery backup for powering the RTC when main + battery is removed or in very low power state. This flag will enable + the backup battery charging. +- ti,back-battery-charge-low-current: Configure lower charging current. Device + supports the charging current as < 100mA or >100mA. Low current will + set as <100mA. + +Example: + palmas: tps65913@58 { + ... + palmas_rtc: rtc { + compatible = "ti,palmas-rtc"; + interrupt-parent = <&palmas>; + interrupts = <8 0>; + ti,back-battery-charge-enable; + ti,back-battery-charge-low-current; + }; + ... + }; diff -puN drivers/rtc/rtc-palmas.c~drivers-rtc-rtc-palmasc-support-for-backup-battery-charging drivers/rtc/rtc-palmas.c --- a/drivers/rtc/rtc-palmas.c~drivers-rtc-rtc-palmasc-support-for-backup-battery-charging +++ a/drivers/rtc/rtc-palmas.c @@ -238,6 +238,15 @@ static int palmas_rtc_probe(struct platf struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); struct palmas_rtc *palmas_rtc = NULL; int ret; + bool enable_bb_charging = false; + bool low_bb_charging; + + if (pdev->dev.of_node) { + enable_bb_charging = of_property_read_bool(pdev->dev.of_node, + "ti,back-battery-charge-enable"); + low_bb_charging = of_property_read_bool(pdev->dev.of_node, + "ti,back-battery-charge-low-current"); + } palmas_rtc = devm_kzalloc(&pdev->dev, sizeof(struct palmas_rtc), GFP_KERNEL); @@ -254,6 +263,32 @@ static int palmas_rtc_probe(struct platf palmas_rtc->dev = &pdev->dev; platform_set_drvdata(pdev, palmas_rtc); + if (enable_bb_charging) { + unsigned reg = 0; + + if (low_bb_charging) + reg |= PALMAS_BACKUP_BATTERY_CTRL_BBS_BBC_LOW_ICHRG; + + ret = palmas_update_bits(palmas, PALMAS_PMU_CONTROL_BASE, + PALMAS_BACKUP_BATTERY_CTRL, + PALMAS_BACKUP_BATTERY_CTRL_BBS_BBC_LOW_ICHRG, reg); + if (ret < 0) { + dev_err(&pdev->dev, + "BACKUP_BATTERY_CTRL update failed, %d\n", ret); + return ret; + } + + ret = palmas_update_bits(palmas, PALMAS_PMU_CONTROL_BASE, + PALMAS_BACKUP_BATTERY_CTRL, + PALMAS_BACKUP_BATTERY_CTRL_BB_CHG_EN, + PALMAS_BACKUP_BATTERY_CTRL_BB_CHG_EN); + if (ret < 0) { + dev_err(&pdev->dev, + "BACKUP_BATTERY_CTRL update failed, %d\n", ret); + return ret; + } + } + /* Start RTC */ ret = palmas_update_bits(palmas, PALMAS_RTC_BASE, PALMAS_RTC_CTRL_REG, PALMAS_RTC_CTRL_REG_STOP_RTC, _ Patches currently in -mm which might be from ldewangan@xxxxxxxxxx are drivers-rtc-rtc-palmasc-support-for-backup-battery-charging.patch linux-next.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html