1 files changed, 88 insertions, 0 deletions
diff --git a/examples/imx7d_sdb_m4/demo_apps/low_power_imx7d/rand_wfi/hardware_init.c b/examples/imx7d_sdb_m4/demo_apps/low_power_imx7d/rand_wfi/hardware_init.c
new file mode 100644
index 0000000..d36d4f8
--- /dev/null
+++ b/examples/imx7d_sdb_m4/demo_apps/low_power_imx7d/rand_wfi/hardware_init.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2015, Freescale Semiconductor, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * o Redistributions of source code must retain the above copyright notice, this list
+ *   of conditions and the following disclaimer.
+ *
+ * o Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ * o Neither the name of Freescale Semiconductor, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived from this
+ *   software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "board.h"
+#include "gpio_pins.h"
+
+void hardware_init(void)
+{
+    uint32_t i;
+    /*
+     * Set GPC_LPCR_M4 to run. In Low Power Demo, when M4 enters STOP, the
+     * whole system may enter DSM. A7 will rekick A7 after exit DSM. GPC
+     * register status will not auto reset so a manual reset is performed
+     * here
+     * GPC RDC is default set by U-Boot to be shared by A7 and M4
+     */
+    GPC_LPCR_M4 = GPC_LPCR_M4 & (~GPC_LPCR_M4_LPM0_MASK);
+
+    /* Board specific RDC settings */
+    BOARD_RdcInit();
+
+    /* Board specific clock settings */
+    BOARD_ClockInit();
+
+    /*
+     * In order to wakeup M4 from LPM, all PLLCTRLs need to be set to "NeededRun"
+     */
+    for (i=0; i!=33; i++) {
+        CCM_BASE_PTR->PLL_CTRL[i].PLL_CTRL = ccmClockNeededRun;
+    }
+
+    /* initialize debug uart */
+    dbg_uart_init();
+
+    /* In this demo, we need to grasp board GPT exclusively */
+    RDC_SetPdapAccess(RDC, BOARD_GPTA_RDC_PDAP, 3 << (BOARD_DOMAIN_ID * 2), false, false);
+
+    /* Select GPTA clock derived from OSC24M */
+    CCM_UpdateRoot(CCM, BOARD_GPTA_CCM_ROOT, ccmRootmuxGptOsc24m, 0, 0);
+
+    /* Enable clock used by GPTA */
+    CCM_EnableRoot(CCM, BOARD_GPTA_CCM_ROOT);
+    CCM_ControlGate(CCM, BOARD_GPTA_CCM_CCGR, ccmClockNeededAll);
+
+    /* In this demo, we need GPT4 to work as a patch to fix GPC sync issue */
+    RDC_SetPdapAccess(RDC, BOARD_GPTB_RDC_PDAP, 3 << (BOARD_DOMAIN_ID * 2), false, false);
+
+    /* Select GPTB clock derived from OSC24M */
+    CCM_UpdateRoot(CCM, BOARD_GPTB_CCM_ROOT, ccmRootmuxGptOsc24m, 0, 0);
+
+    /* Enable clock used by GPTB */
+    CCM_EnableRoot(CCM, BOARD_GPTB_CCM_ROOT);
+    CCM_ControlGate(CCM, BOARD_GPTB_CCM_CCGR, ccmClockNeededAll);
+
+    /* Enable MU clock*/
+    CCM_ControlGate(CCM, BOARD_MU_CCM_CCGR, ccmClockNeededAll);
+}
+
+/*******************************************************************************
+ * EOF
+ ******************************************************************************/