kernel/linux.git/drivers/firmware/raspberrypi.c, branch linux-4.20.y

firmware: raspberrypi: Remove VLA usage

2018-07-09T17:47:29+00:00

In the quest to remove all stack VLA usage from the kernel[1], this removes the VLA in favor of a maximum size and adds a sanity check. Existing callers of the firmware interface never need more than 24 bytes (struct gpio_set_config). This chooses 32 just to stay ahead of future growth. v2: Fix the length passed to rpi_firmware_property_list (by anholt, acked by Kees). [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Signed-off-by: Kees Cook Signed-off-by: Eric Anholt Reviewed-by: Eric Anholt

firmware: raspberrypi: Register hwmon driver

2018-07-09T17:47:28+00:00

Since the raspberrypi-hwmon driver is tied to the VC4 firmware instead of particular hardware its registration should be in the firmware driver. Signed-off-by: Stefan Wahren Signed-off-by: Eric Anholt

firmware: raspberrypi: print time using time64_t

2017-11-29T00:24:33+00:00

The firmware timestamp is an unsigned 32-bit value, but we copy it into a signed 32-bit variable, so we can theoretically get an overflow in the calculation when the timestamp is between 2038 and 2106. This changes the temporary variable to time64_t and changes the deprecated time_to_tm() over to time64_to_tm() accordingly. There is still an overflow in y2106, but that is a limitation of the firmware interface, not a kernel problem. Signed-off-by: Arnd Bergmann Signed-off-by: Eric Anholt Reviewed-by: Eric Anholt

ARM: bcm2835: Add the Raspberry Pi firmware driver

2015-10-14T22:30:06+00:00

This gives us a function for making mailbox property channel requests of the firmware, which is most notable in that it will let us get and set clock rates. Signed-off-by: Eric Anholt Acked-by: Stephen Warren