diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0137-rtc-ds1307-add-support-for-the-DT-property-wakeup-so.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0137-rtc-ds1307-add-support-for-the-DT-property-wakeup-so.patch | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0137-rtc-ds1307-add-support-for-the-DT-property-wakeup-so.patch b/target/linux/brcm2708/patches-4.4/0137-rtc-ds1307-add-support-for-the-DT-property-wakeup-so.patch deleted file mode 100644 index 1c6f35541e..0000000000 --- a/target/linux/brcm2708/patches-4.4/0137-rtc-ds1307-add-support-for-the-DT-property-wakeup-so.patch +++ /dev/null @@ -1,93 +0,0 @@ -From 52a2e460333eb84cf5afb3acff953b79487fd3ac Mon Sep 17 00:00:00 2001 -From: Michael Lange <linuxstuff@milaw.biz> -Date: Thu, 21 Jan 2016 18:10:16 +0100 -Subject: [PATCH] rtc: ds1307: add support for the DT property 'wakeup-source' - -For RTC chips with no IRQ directly connected to the SoC, the RTC chip -can be forced as a wakeup source by stating that explicitly in -the device's .dts file using the "wakeup-source" boolean property. -This will guarantee the 'wakealarm' sysfs entry is available on the -device, if supported by the RTC. - -With these changes to the driver rtc-ds1307 and the necessary entries -in the .dts file, I get an working ds1337 RTC on the Witty Pi extension -board by UUGear for the Raspberry Pi. - -An example for the entry in the .dts file: - - rtc: ds1337@68 { - compatible = "dallas,ds1337"; - reg = <0x68>; - wakeup-source; - -If the "wakeup-source" property is set, do not request an IRQ. -Set also UIE mode to unsupported, to get a working 'hwclock' binary. - -Signed-off-by: Michael Lange <linuxstuff@milaw.biz> -Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> ---- - drivers/rtc/rtc-ds1307.c | 29 +++++++++++++++++++++++++++-- - 1 file changed, 27 insertions(+), 2 deletions(-) - ---- a/drivers/rtc/rtc-ds1307.c -+++ b/drivers/rtc/rtc-ds1307.c -@@ -860,6 +860,7 @@ static int ds1307_probe(struct i2c_clien - struct chip_desc *chip = &chips[id->driver_data]; - struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); - bool want_irq = false; -+ bool ds1307_can_wakeup_device = false; - unsigned char *buf; - struct ds1307_platform_data *pdata = dev_get_platdata(&client->dev); - irq_handler_t irq_handler = ds1307_irq; -@@ -907,6 +908,20 @@ static int ds1307_probe(struct i2c_clien - ds1307->write_block_data = ds1307_write_block_data; - } - -+#ifdef CONFIG_OF -+/* -+ * For devices with no IRQ directly connected to the SoC, the RTC chip -+ * can be forced as a wakeup source by stating that explicitly in -+ * the device's .dts file using the "wakeup-source" boolean property. -+ * If the "wakeup-source" property is set, don't request an IRQ. -+ * This will guarantee the 'wakealarm' sysfs entry is available on the device, -+ * if supported by the RTC. -+ */ -+ if (of_property_read_bool(client->dev.of_node, "wakeup-source")) { -+ ds1307_can_wakeup_device = true; -+ } -+#endif -+ - switch (ds1307->type) { - case ds_1337: - case ds_1339: -@@ -925,11 +940,13 @@ static int ds1307_probe(struct i2c_clien - ds1307->regs[0] &= ~DS1337_BIT_nEOSC; - - /* -- * Using IRQ? Disable the square wave and both alarms. -+ * Using IRQ or defined as wakeup-source? -+ * Disable the square wave and both alarms. - * For some variants, be sure alarms can trigger when we're - * running on Vbackup (BBSQI/BBSQW) - */ -- if (ds1307->client->irq > 0 && chip->alarm) { -+ if (chip->alarm && (ds1307->client->irq > 0 || -+ ds1307_can_wakeup_device)) { - ds1307->regs[0] |= DS1337_BIT_INTCN - | bbsqi_bitpos[ds1307->type]; - ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE); -@@ -1144,6 +1161,14 @@ read_rtc: - return PTR_ERR(ds1307->rtc); - } - -+ if (ds1307_can_wakeup_device) { -+ /* Disable request for an IRQ */ -+ want_irq = false; -+ dev_info(&client->dev, "'wakeup-source' is set, request for an IRQ is disabled!\n"); -+ /* We cannot support UIE mode if we do not have an IRQ line */ -+ ds1307->rtc->uie_unsupported = 1; -+ } -+ - if (want_irq) { - err = devm_request_threaded_irq(&client->dev, - client->irq, NULL, irq_handler, |