From 240073ffa049b38ee0810ae996436a2b34a051c1 Mon Sep 17 00:00:00 2001 From: LuluTHSu Date: Wed, 9 Dec 2020 16:40:54 +0800 Subject: platform/mowgli: Limit PHB0/(pec0) to gen3 speed [ Upstream commit 127a3ee2417a2a71b63cca5fd7055d9b64939bb1 ] Use the method provided by Frederic: Add the "ibm, maximum link speed" attribute to the PHB device tree at index 0. The phb4.c code will looks for it and set up the link correctly. Signed-off-by: LuluTHSu Reviewed-by: Frederic Barrat Signed-off-by: Vasant Hegde --- platforms/astbmc/mowgli.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/platforms/astbmc/mowgli.c b/platforms/astbmc/mowgli.c index 213d734..df83319 100644 --- a/platforms/astbmc/mowgli.c +++ b/platforms/astbmc/mowgli.c @@ -49,6 +49,21 @@ static void vpd_dt_fixup(void) } } +static void phb0_fixup(void) +{ + struct dt_node *stk; + u32 phb_index; + + /* Limit PHB0/(pec0) to gen3 speed */ + dt_for_each_compatible(dt_root, stk, "ibm,power9-phb-stack") { + phb_index = dt_prop_get_u32_def(stk, "ibm,phb-index", -1); + if (phb_index == 0) { + dt_check_del_prop(stk, "ibm,max-link-speed"); + dt_add_property_cells(stk, "ibm,max-link-speed", 3); + } + } +} + static bool mowgli_probe(void) { if (!dt_node_is_compatible(dt_root, "ibm,mowgli")) @@ -63,6 +78,7 @@ static bool mowgli_probe(void) vpd_dt_fixup(); slot_table_init(mowgli_phb_table); + phb0_fixup(); return true; } -- cgit v1.1