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609e71e68e
Add dedicated getter and setter for SCLK_UART0_PMU. This allows the driver to correctly handle UART0 clocks, and thus it fixes the issues with UART0 not working in case DEBUG_UART is disabled. Unlike other Rockchip SoCs, i.e. rk3399, in the PX30 the default clock source for UART is GPLL, instead of external oscillator. If the DEBUG_UART is enabled, the clock source is changed in board_debug_uart_init function to 24Mhz oscillator, which also matches the fallback value obtained from DT node. In case the DEBUG_UART is disabled, the UART clock source remains default, and the DM serial driver wrongly configures the baud rate, resulting in broken communication. By implementing the UART clock getter/setter, the serial driver can probe the actual configuration and corectly configure itself. The DEBUG_UART settings now should not affect it. The driver supports GPLL and 24M oscillator. NPLL and USBPHY480M sources, that are managed by CRU, are not yet handled, as likely they won't be used in real scenarios. Signed-off-by: Lukasz Czechowski <lukasz.czechowski@thaumatec.com> Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>