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[U-Boot,v4,22/35] ARM: i.MX6: sabresd: Add imx6_pcie_toggle_reset

Message ID 1491720776-7445-23-git-send-email-jagan@openedev.com
State Superseded
Delegated to: Stefano Babic
Headers show

Commit Message

Jagan Teki April 9, 2017, 6:52 a.m. UTC 
From: Jagan Teki <jagan@amarulasolutions.com>

Add imx6_pcie_toggle_reset on board file using dm_gpio_*
calls for OF_CONTROL configs.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
Changes for v4, v3, v2:
- none

 board/freescale/mx6sabresd/mx6sabresd.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
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Patch

diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index f4e14be..67fc192 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -561,6 +561,37 @@  int imx6_pcie_toggle_power(void)
 #endif
 	return 0;
 }
+
+int imx6_pcie_toggle_reset(void)
+{
+#ifdef CONFIG_PCIE_IMX_PERST_GPIO
+	struct gpio_desc reset;
+	int ret;
+
+	ret = dm_gpio_lookup_name("GPIO7_12", &reset);
+	if (ret) {
+		printf("Cannot get GPIO7_12\n");
+		return ret;
+	}
+
+	ret = dm_gpio_request(&reset, "reset");
+	if (ret) {
+		printf("Cannot request GPIO7_12\n");
+		return ret;
+	}
+
+	dm_gpio_set_dir_flags(&reset, GPIOD_IS_OUT);
+
+	dm_gpio_set_value(&reset, 0);
+	mdelay(20);
+	dm_gpio_set_value(&reset, 1);
+	mdelay(20);
+
+#else
+	puts("WARNING: Make sure the PCIe #PERST line is connected!\n");
+#endif
+	return 0;
+}
 #endif
 
 #ifndef CONFIG_OF_CONTROL