Commit 47e3501a authored by Siarhei Siamashka's avatar Siarhei Siamashka Committed by Hans de Goede
Browse files

sunxi: dram: Support more sun[457]i dram parameters in Kconfig



This patch allows to configure all the important DRAM parameters in Kconfig.
Signed-off-by: default avatarSiarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent d133647a
......@@ -41,6 +41,15 @@ config DRAM_CLK
Set the dram clock speed, valid range 240 - 480, must be a multiple
of 24.
if MACH_SUN5I || MACH_SUN7I
config DRAM_MBUS_CLK
int "sunxi mbus clock speed"
default 300
---help---
Set the mbus clock speed. The maximum on sun5i hardware is 300MHz.
endif
config DRAM_ZQ
int "sunxi dram zq value"
default 123 if MACH_SUN4I || MACH_SUN5I || MACH_SUN6I || MACH_SUN8I
......@@ -56,6 +65,40 @@ config DRAM_EMR1
---help---
Set the dram controller emr1 value.
config DRAM_ODT_EN
int "sunxi dram odt_en value"
default 0
---help---
Set the dram controller odt_en parameter. This can be used to
enable/disable the ODT feature.
config DRAM_TPR3
hex "sunxi dram tpr3 value"
default 0
---help---
Set the dram controller tpr3 parameter. This parameter configures
the delay on the command lane and also phase shifts, which are
applied for sampling incoming read data. The default value 0
means that no phase/delay adjustments are necessary. Properly
configuring this parameter increases reliability at high DRAM
clock speeds.
config DRAM_DQS_GATING_DELAY
hex "sunxi dram dqs_gating_delay value"
default 0
---help---
Set the dram controller dqs_gating_delay parmeter. Each byte
encodes the DQS gating delay for each byte lane. The delay
granularity is 1/4 cycle. For example, the value 0x05060606
means that the delay is 5 quarter-cycles for one lane (1.25
cycles) and 6 quarter-cycles (1.5 cycles) for 3 other lanes.
The default value 0 means autodetection. The results of hardware
autodetection are not very reliable and depend on the chip
temperature (sometimes producing different results on cold start
and warm reboot). But the accuracy of hardware autodetection
is usually good enough, unless running at really high DRAM
clocks speeds (up to 600MHz). If unsure, keep as 0.
choice
prompt "sunxi dram timings"
default DRAM_TIMINGS_VENDOR_MAGIC
......
......@@ -9,7 +9,7 @@ static struct dram_para dram_para = {
.io_width = 0,
.bus_width = 0,
.zq = CONFIG_DRAM_ZQ,
.odt_en = 0,
.odt_en = CONFIG_DRAM_ODT_EN,
.size = 0,
#ifdef CONFIG_DRAM_TIMINGS_VENDOR_MAGIC
.cas = 6,
......@@ -19,12 +19,14 @@ static struct dram_para dram_para = {
.emr2 = 0,
#else
# include "dram_timings_sun4i.h"
.active_windowing = 1,
#endif
.tpr3 = 0,
.tpr3 = CONFIG_DRAM_TPR3,
.tpr4 = 0,
.tpr5 = 0,
.emr1 = CONFIG_DRAM_EMR1,
.emr3 = 0,
.dqs_gating_delay = CONFIG_DRAM_DQS_GATING_DELAY,
};
unsigned long sunxi_dram_init(void)
......
......@@ -5,13 +5,14 @@
static struct dram_para dram_para = {
.clock = CONFIG_DRAM_CLK,
.mbus_clock = CONFIG_DRAM_MBUS_CLK,
.type = 3,
.rank_num = 1,
.density = 0,
.io_width = 0,
.bus_width = 0,
.zq = CONFIG_DRAM_ZQ,
.odt_en = 0,
.odt_en = CONFIG_DRAM_ODT_EN,
.size = 0,
#ifdef CONFIG_DRAM_TIMINGS_VENDOR_MAGIC
.cas = 9,
......@@ -21,12 +22,14 @@ static struct dram_para dram_para = {
.emr2 = 0x10,
#else
# include "dram_timings_sun4i.h"
.active_windowing = 1,
#endif
.tpr3 = 0,
.tpr4 = 0,
.tpr5 = 0,
.emr1 = CONFIG_DRAM_EMR1,
.emr3 = 0,
.dqs_gating_delay = CONFIG_DRAM_DQS_GATING_DELAY,
};
unsigned long sunxi_dram_init(void)
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment