hwspinlock: add STM32 hwspinlock device
This patch adds support of hardware semaphores for stm32mp1 SoC. The hardware block provides 32 semaphores. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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