u-boot.git/drivers/rtc/goldfish_rtc.c, branch main

rtc: goldfish: Return error when device address is invalid

2026-06-23T18:38:01Z

goldfish_rtc_of_to_plat() currently returns success even when dev_read_addr() fails to find a valid address. This leaves plat->reg unset (or 0) and defers the failure to probe(). Return -EINVAL immediately when the address is FDT_ADDR_T_NONE so the failure is reported at the of_to_plat stage where it belongs. This aligns the driver with the recent fix introduced in the goldfish serial driver by Naveen Kumar Chaudhary. [1] Link: https://lore.kernel.org/u-boot/vgwnt6mnls3lf3zdm6mz5siztzkvppte4ykszbvifjzukvmksf@maaxe5agqpim/ [1] Signed-off-by: Kuan-Wei Chiu

rtc: goldfish: Use __raw_readl() and __raw_writel()

2026-05-22T22:47:54Z

In QEMU, the Goldfish RTC is explicitly instantiated as a big-endian device on the m68k virt machine (via the 'big-endian=true' property). Currently, this driver uses ioread32() and iowrite32(), which works by luck because the underlying readl() and writel() are currently broken on m68k. Use __raw_readl() and __raw_writel() instead to avoid breaking this driver when the endianness of readl() and writel() is fixed. Signed-off-by: Kuan-Wei Chiu Tested-by: Daniel Palmer Reviewed-by: Simon Glass Signed-off-by: Daniel Palmer

rtc: goldfish: Support platform data for non-DT probing

2026-02-02T20:24:40Z

Currently, the Goldfish RTC driver exclusively relies on device tree to retrieve the base address, failing immediately if dev_read_addr() returns FDT_ADDR_T_NONE. This restriction prevents the driver from being used on platforms that instantiate devices via U_BOOT_DRVINFO() instead of device tree, such as the QEMU m68k virt machine. Add support for platform data to address this limitation. Introduce a new .of_to_plat hook to handle device tree parsing and populate the platform data. Update the probe function to rely exclusively on this platform data, enabling support for both Device Tree and manual instantiation. Introduce a new header file include/goldfish_rtc.h to define the platform data structure. Signed-off-by: Kuan-Wei Chiu Reviewed-by: Heinrich Schuchardt

rtc: fix the description of the Goldfish RTC driver

2024-07-14T07:56:24Z

Replace the incorrect description that was copied from another driver. Signed-off-by: Heinrich Schuchardt

rtc: goldfish_rtc_probe should be static

2024-04-10T15:34:53Z

There is no need to export goldfish_rtc_probe(). Fixes: 2d6dc19fd25d ("rtc: driver for Goldfish RTC") Signed-off-by: Heinrich Schuchardt

rtc: driver for Goldfish RTC

2024-01-17T08:03:43Z

The Goldfish RTC is a virtual device which may be supplied by QEMU. It is enabled by default on QEMU's RISC-V virt machine. Signed-off-by: Heinrich Schuchardt