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The change is only hardware, and does not need driver change: Added hardware flow control during transmit packet with variable delay. The new id is then added to the ids list structure. Signed-off-by: Yann Gautier <yann.gautier@foss.st.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20211215141727.4901-2-yann.gautier@foss.st.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>