From cad9e7a6ecf2db58ba30c49847851248d4712110 Mon Sep 17 00:00:00 2001 From: Yen Lin Date: Wed, 6 May 2015 13:56:50 -0700 Subject: t210: set CAR2PMC_CPU_ACK_WIDTH to 0 HW team has suggested to set CAR2PMC_CPU_ACK_WIDTH to 0. BUG=None BRANCH=None TEST=Tested on Smaug; still boot to kernel Change-Id: I4d13a4048b73455b16da7a40c408c912fa97e4e7 Signed-off-by: Patrick Georgi Original-Commit-Id: 8891a79e72af26d986af9e415149d4ca0aa6fedd Original-Change-Id: I850a6756d7743993802fb85aad403e4cbef7a661 Original-Signed-off-by: Yen Lin Original-Reviewed-on: https://chromium-review.googlesource.com/282416 Original-Reviewed-by: Furquan Shaikh Reviewed-on: http://review.coreboot.org/10841 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/soc/nvidia/tegra210/ccplex.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'src/soc/nvidia/tegra210/ccplex.c') diff --git a/src/soc/nvidia/tegra210/ccplex.c b/src/soc/nvidia/tegra210/ccplex.c index f3c61cbbe6..a3c67225c0 100644 --- a/src/soc/nvidia/tegra210/ccplex.c +++ b/src/soc/nvidia/tegra210/ccplex.c @@ -92,9 +92,26 @@ static void request_ram_repair(void) stopwatch_duration_usecs(&sw)); } +static void set_cpu_ack_width(uint32_t val) +{ + uint32_t reg; + + reg = read32(CLK_RST_REG(cpu_softrst_ctrl2)); + reg &= ~CAR2PMC_CPU_ACK_WIDTH_MASK; + reg |= val; + write32(CLK_RST_REG(cpu_softrst_ctrl2), reg); +} + void ccplex_cpu_prepare(void) { enable_cpu_clocks(); + + /* + * The POR value of CAR2PMC_CPU_ACK_WIDTH is 0x200. + * The recommended value is 0. + */ + set_cpu_ack_width(0); + enable_cpu_power_partitions(); mainboard_configure_pmc(); -- cgit v1.2.3