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From: Michael Graichen <michael.graichen@hotmail.com>
To: "barebox@lists.infradead.org" <barebox@lists.infradead.org>
Subject: [PATCH 6/7] Zedboard turn on LED on startup
Date: Thu, 2 Apr 2020 08:22:55 +0000	[thread overview]
Message-ID: <DB7PR02MB433223DC2A79CECB7B3FBA35ABC60@DB7PR02MB4332.eurprd02.prod.outlook.com> (raw)

Turns on the LED on MIO7 on the Zedboard to have a signal

diff --git a/arch/arm/boards/avnet-zedboard/lowlevel.c b/arch/arm/boards/avnet-zedboard/lowlevel.c
index b8001fcf6..eb85df507 100644
--- a/arch/arm/boards/avnet-zedboard/lowlevel.c
+++ b/arch/arm/boards/avnet-zedboard/lowlevel.c
@@ -306,6 +306,16 @@ ENTRY_FUNCTION(start_avnet_zedboard, r0, r1, r2)
 
 	void *fdt = __dtb_zynq_zed_start + get_runtime_offset();
 
+	/* MIO_07 in GPIO Mode 3.3V VIO, can be uncomented because it is the default value */
+	writel(0x0000DF0D, ZYNQ_SLCR_UNLOCK);
+	writel(0x00000600, 0xF800071C );
+	writel(0x0000767B, ZYNQ_SLCR_LOCK);
+
+	/* turns on the LED MIO_07 */
+	writel((1<<7), 0xe000a204 );    // Direction
+	writel((1<<7), 0xe000a208 );    // Output enable
+	writel((1<<7), 0xe000a040 );    // DATA Register
+
 	arm_cpu_lowlevel_init();
 	zynq_cpu_lowlevel_init();
 
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                 reply	other threads:[~2020-04-02  8:23 UTC|newest]

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