From 081f3a19912174018f55c854c7b258cb2d511ce1 Mon Sep 17 00:00:00 2001 From: Lukas Funke Date: Fri, 7 Jun 2024 11:26:08 +0200 Subject: xilinx: zynqmp: Enable reset_cpu() in SPL This commit enables SPL to reset the CPU via PMU-firmware. The usual reset mechanism requires bl31 to be loaded which may not be the case in SPL. Signed-off-by: Lukas Funke Link: https://lore.kernel.org/r/20240607092608.712996-2-lukas.funke-oss@weidmueller.com Signed-off-by: Michal Simek --- board/xilinx/zynqmp/zynqmp.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'board/xilinx/zynqmp') diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c index 63cc6b862e9..b4c15b041cc 100644 --- a/board/xilinx/zynqmp/zynqmp.c +++ b/board/xilinx/zynqmp/zynqmp.c @@ -285,6 +285,18 @@ int dram_init(void) #if !CONFIG_IS_ENABLED(SYSRESET) void reset_cpu(void) { + if (!IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) { + log_warning("reset failed: ZYNQMP_FIRMWARE disabled"); + return; + } + + /* In case of !CONFIG_ZYNQMP_FIRMWARE the call to 'xilinx_pm_request()' + * will be removed by the compiler due to the early return. + * If CONFIG_ZYNQMP_FIRMWARE is defined in SPL 'xilinx_pm_request()' + * will send command over IPI and requires pmufw to be present. + */ + xilinx_pm_request(PM_RESET_ASSERT, ZYNQMP_PM_RESET_SOFT, + PM_RESET_ACTION_ASSERT, 0, 0, NULL); } #endif -- cgit v1.2.3