[coreboot-gerrit] Patch set updated for coreboot: 4a0d57d asrock/e350m1/mainboard.c: Disable GPP CLK0 through SLT_GFX_CLK

[Paul Menzel (paulepanter@users.sourceforge.net)]

Paul Menzel (paulepanter at users.sourceforge.net) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5397

-gerrit

commit 4a0d57d74d3e887c8c0adc310520c601c809bb53
Author: Paul Menzel <paulepanter at users.sourceforge.net>
Date:   Sat Mar 22 23:22:29 2014 +0100

    asrock/e350m1/mainboard.c: Disable GPP CLK0 through SLT_GFX_CLK
    
    According to Edward this might fix the problems with the Ethernet device
    not showing up sometimes, when the PSU is not turned off during restarts
    or shut down and start.
    
    According to the SB800 Register Reference Guide [1] the clock pins are
    powered on (0xFF) by default. Powering off the clock pins for GPP4 to
    GPP8 and the Gfx PCIe device, hopefully sets the Ethernet device up
    correctly, so it is always detected during start up.
    
    [1] AMD SB800-Series Southbridges Register Reference Guide
        Publication: #45482
        Revision: 3.04
    
    Change-Id: Ibd839bb469f06cbbb8a50d6a0bc58ad967a1a5e1
    Signed-off-by: Paul Menzel <paulepanter at users.sourceforge.net>
---
 src/mainboard/asrock/e350m1/mainboard.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/mainboard/asrock/e350m1/mainboard.c b/src/mainboard/asrock/e350m1/mainboard.c
index a98a179..e04bb92 100644
--- a/src/mainboard/asrock/e350m1/mainboard.c
+++ b/src/mainboard/asrock/e350m1/mainboard.c
@@ -54,6 +54,15 @@ static void mainboard_enable(device_t dev)
 {
 	printk(BIOS_INFO, "Mainboard " CONFIG_MAINBOARD_PART_NUMBER " Enable.\n");
 
+	/* enable GPP CLK0 thru CLK3 (interleaved) */
+	/* disable GPP CLK4 thru SLT_GFX_CLK */
+	u8 *misc_mem_clk_cntrl = (u8 *)(ACPI_MMIO_BASE + MISC_BASE);
+	*(misc_mem_clk_cntrl + 0) = 0xFF;
+	*(misc_mem_clk_cntrl + 1) = 0xFF;
+	*(misc_mem_clk_cntrl + 2) = 0x00;
+	*(misc_mem_clk_cntrl + 3) = 0x00;
+	*(misc_mem_clk_cntrl + 4) = 0x00;
+
 	/*
 	 * Initialize ASF registers to an arbitrary address because someone
 	 * long ago set things up this way inside the SPD read code.  The