diff options
Diffstat (limited to 'target/linux/at91/patches-5.10/229-ARM-dts-at91-sama7g5ek-add-suspend-voltage-for-ddr3l.patch')
| -rw-r--r-- | target/linux/at91/patches-5.10/229-ARM-dts-at91-sama7g5ek-add-suspend-voltage-for-ddr3l.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/at91/patches-5.10/229-ARM-dts-at91-sama7g5ek-add-suspend-voltage-for-ddr3l.patch b/target/linux/at91/patches-5.10/229-ARM-dts-at91-sama7g5ek-add-suspend-voltage-for-ddr3l.patch new file mode 100644 index 0000000000..ce412dde1c --- /dev/null +++ b/target/linux/at91/patches-5.10/229-ARM-dts-at91-sama7g5ek-add-suspend-voltage-for-ddr3l.patch @@ -0,0 +1,47 @@ +From e5f87471392b344b1261d1eaf93fd44710587ea9 Mon Sep 17 00:00:00 2001 +From: Claudiu Beznea <claudiu.beznea@microchip.com> +Date: Thu, 30 Sep 2021 18:42:17 +0300 +Subject: [PATCH 229/247] ARM: dts: at91: sama7g5ek: add suspend voltage for + ddr3l rail + +SAMA7G5-EK board has DDR3L type of memory soldered. This needs 1.35V. The +1.35V for DDR3L rail at run-time is selected by the proper configuration +on SELV2 pin (for 1.35V it needs to be in high-z state). When suspended +the MCP16502 PMIC soldered on SAMA7G5-EK will use different sets of +configuration registers to provide proper voltages on its rail. Run-time +configuration registers could be configured differently than suspend +configuration register for MCP16502 (VSEL2 affects only run-time +configuration). In suspend states the DDR3L memory soldered on SAMA7G5-EK +switches to self-refresh. Even on self-refresh it needs to be powered by +a 1.35V rail. Thus, make sure the PMIC is configured properly when system +is suspended. + +Fixes: 7540629e2fc7 (ARM: dts: at91: add sama7g5 SoC DT and sama7g5-ek") +Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> +Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> +Link: https://lore.kernel.org/r/20210930154219.2214051-2-claudiu.beznea@microchip.com +--- + arch/arm/boot/dts/at91-sama7g5ek.dts | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/arch/arm/boot/dts/at91-sama7g5ek.dts b/arch/arm/boot/dts/at91-sama7g5ek.dts +index 8b13b031a167..f0772fa01751 100644 +--- a/arch/arm/boot/dts/at91-sama7g5ek.dts ++++ b/arch/arm/boot/dts/at91-sama7g5ek.dts +@@ -196,11 +196,13 @@ vddioddr: VDD_DDR { + + regulator-state-standby { + regulator-on-in-suspend; ++ regulator-suspend-microvolt = <1350000>; + regulator-mode = <4>; + }; + + regulator-state-mem { + regulator-on-in-suspend; ++ regulator-suspend-microvolt = <1350000>; + regulator-mode = <4>; + }; + }; +-- +2.32.0 + |