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Commit e541454a authored by Olof Johansson's avatar Olof Johansson
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Merge tag 'arm-soc/for-4.19/drivers' of https://github.com/Broadcom/stblinux into next/drivers 

This pull request contains Broadcom ARM/ARM64/MIPS SoCs drivers changes
for 4.19, please pull the following:

- Doug updates the low-level suspend/resume code for ARM SoCs to support
  the latest rev B3.0 memory controllers found on newer chips with an
  appropriate match structure to perform the correct entry sequencing

- Florian updates the Device Tree binding document for these memory
  controllers to list all possible compatible strings that exist given
   the supported memory controllers.

- Stefan adds the GET_THROTTLED firmware property value that is required
  for the Rasperry Pi voltage monitoring driver and updates the
  Raspberry Pi firmware driver accordingly to register such a device
  using the HWMON subsystem. Finally he adds support for reporting under
  voltage conditions using a specialized HWMON driver.

* tag 'arm-soc/for-4.19/drivers' of https://github.com/Broadcom/stblinux

:
  firmware: raspberrypi: Remove VLA usage
  firmware: raspberrypi: Register hwmon driver
  hwmon: Add support for RPi voltage sensor
  soc: bcm: brcmstb: Add missing DDR MEMC compatible strings
  soc: bcm: brcmstb: pm: Add support for newer rev B3.0 controllers
  ARM: bcm2835: Add GET_THROTTLED firmware property

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parents 872d6d96 5773898b

Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt

+4 −0
Original line number Diff line number Diff line
@@ -189,7 +189,11 @@ Power-Down (SRPD), among other things. 


Required properties:

- compatible     : should contain one of these

	"brcm,brcmstb-memc-ddr-rev-b.2.1"

	"brcm,brcmstb-memc-ddr-rev-b.2.2"

	"brcm,brcmstb-memc-ddr-rev-b.2.3"

	"brcm,brcmstb-memc-ddr-rev-b.3.0"

	"brcm,brcmstb-memc-ddr-rev-b.3.1"

	"brcm,brcmstb-memc-ddr"

- reg            : the MEMC DDR register range

Documentation/hwmon/raspberrypi-hwmon

0 → 100644
+22 −0
Original line number Diff line number Diff line 
Kernel driver raspberrypi-hwmon

===============================



Supported boards:

  * Raspberry Pi A+ (via GPIO on SoC)

  * Raspberry Pi B+ (via GPIO on SoC)

  * Raspberry Pi 2 B (via GPIO on SoC)

  * Raspberry Pi 3 B (via GPIO on port expander)

  * Raspberry Pi 3 B+ (via PMIC)



Author: Stefan Wahren <stefan.wahren@i2se.com>



Description

-----------



This driver periodically polls a mailbox property of the VC4 firmware to detect

undervoltage conditions.



Sysfs entries

-------------



in0_lcrit_alarm		Undervoltage alarm

drivers/firmware/raspberrypi.c

+27 −2
Original line number Diff line number Diff line
@@ -21,6 +21,10 @@ 
#define MBOX_DATA28(msg)		((msg) & ~0xf)

#define MBOX_CHAN_PROPERTY		8



#define MAX_RPI_FW_PROP_BUF_SIZE	32



static struct platform_device *rpi_hwmon;



struct rpi_firmware {

	struct mbox_client cl;

	struct mbox_chan *chan; /* The property channel. */
@@ -143,18 +147,22 @@ int rpi_firmware_property(struct rpi_firmware *fw, 
	/* Single tags are very small (generally 8 bytes), so the

	 * stack should be safe.

	 */

	u8 data[buf_size + sizeof(struct rpi_firmware_property_tag_header)];

	u8 data[sizeof(struct rpi_firmware_property_tag_header) +

		MAX_RPI_FW_PROP_BUF_SIZE];

	struct rpi_firmware_property_tag_header *header =

		(struct rpi_firmware_property_tag_header *)data;

	int ret;



	if (WARN_ON(buf_size > sizeof(data) - sizeof(*header)))

		return -EINVAL;



	header->tag = tag;

	header->buf_size = buf_size;

	header->req_resp_size = 0;

	memcpy(data + sizeof(struct rpi_firmware_property_tag_header),

	       tag_data, buf_size);



	ret = rpi_firmware_property_list(fw, &data, sizeof(data));

	ret = rpi_firmware_property_list(fw, &data, buf_size + sizeof(*header));

	memcpy(tag_data,

	       data + sizeof(struct rpi_firmware_property_tag_header),

	       buf_size);
@@ -183,6 +191,20 @@ rpi_firmware_print_firmware_revision(struct rpi_firmware *fw) 
	}

}



static void

rpi_register_hwmon_driver(struct device *dev, struct rpi_firmware *fw)

{

	u32 packet;

	int ret = rpi_firmware_property(fw, RPI_FIRMWARE_GET_THROTTLED,

					&packet, sizeof(packet));



	if (ret)

		return;



	rpi_hwmon = platform_device_register_data(dev, "raspberrypi-hwmon",

						  -1, NULL, 0);

}



static int rpi_firmware_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;
@@ -209,6 +231,7 @@ static int rpi_firmware_probe(struct platform_device *pdev) 
	platform_set_drvdata(pdev, fw);



	rpi_firmware_print_firmware_revision(fw);

	rpi_register_hwmon_driver(dev, fw);



	return 0;

}
@@ -217,6 +240,8 @@ static int rpi_firmware_remove(struct platform_device *pdev) 
{

	struct rpi_firmware *fw = platform_get_drvdata(pdev);



	platform_device_unregister(rpi_hwmon);

	rpi_hwmon = NULL;

	mbox_free_channel(fw->chan);



	return 0;

drivers/hwmon/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -1298,6 +1298,16 @@ config SENSORS_PWM_FAN 
	  This driver can also be built as a module.  If so, the module

	  will be called pwm-fan.



config SENSORS_RASPBERRYPI_HWMON

	tristate "Raspberry Pi voltage monitor"

	depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)

	help

	  If you say yes here you get support for voltage sensor on the

	  Raspberry Pi.



	  This driver can also be built as a module. If so, the module

	  will be called raspberrypi-hwmon.



config SENSORS_SHT15

	tristate "Sensiron humidity and temperature sensors. SHT15 and compat."

	depends on GPIOLIB || COMPILE_TEST

drivers/hwmon/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -141,6 +141,7 @@ obj-$(CONFIG_SENSORS_PC87427) += pc87427.o 
obj-$(CONFIG_SENSORS_PCF8591)	+= pcf8591.o

obj-$(CONFIG_SENSORS_POWR1220)  += powr1220.o

obj-$(CONFIG_SENSORS_PWM_FAN)	+= pwm-fan.o

obj-$(CONFIG_SENSORS_RASPBERRYPI_HWMON)	+= raspberrypi-hwmon.o

obj-$(CONFIG_SENSORS_S3C)	+= s3c-hwmon.o

obj-$(CONFIG_SENSORS_SCH56XX_COMMON)+= sch56xx-common.o

obj-$(CONFIG_SENSORS_SCH5627)	+= sch5627.o