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This patch adds support for the Realtek RTS5264 Version B card reader controller. To support this chip revision, the driver introduces specific initialization logic to handle the hardware requirements of Version B. The probe flow is updated to detect this version and apply the necessary register configurations. Additionally, the initialization sequence for Version B has been optimized to improve robustness and ensure proper device setup during power-on. These changes ensure correct operation and compatibility with systems using RTS5264 Version B. Signed-off-by: Ricky Wu <ricky_wu@realtek.com> Link: https://lore.kernel.org/r/20250620071325.1887017-1-ricky_wu@realtek.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>