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SubjectApplied "spi: atmel: add deepest PM support to SAMA5D2" to the spi tree
The patch

spi: atmel: add deepest PM support to SAMA5D2

has been applied to the spi tree at


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From e53800787a251d67e532fadf72886be0661aba12 Mon Sep 17 00:00:00 2001
From: Quentin Schulz <>
Date: Fri, 14 Apr 2017 10:22:43 +0200
Subject: [PATCH] spi: atmel: add deepest PM support to SAMA5D2

This adds deepest (Backup+Self-Refresh) PM support to the ATMEL SAMA5D2
SoC's SPI controller.

When resuming from deepest state, it is required to restore MR register
as the registers are lost since VDD core has been shut down when
entering deepest state on the SAMA5D2.

Signed-off-by: Quentin Schulz <>
Acked-by: Alexandre Belloni <>
Acked-by: Nicolas Ferre <>
Signed-off-by: Mark Brown <>
drivers/spi/spi-atmel.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 247d920a512f..1eb83c9613d5 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1702,8 +1702,17 @@ static int atmel_spi_suspend(struct device *dev)
static int atmel_spi_resume(struct device *dev)
struct spi_master *master = dev_get_drvdata(dev);
+ struct atmel_spi *as = spi_master_get_devdata(master);
int ret;

+ ret = clk_prepare_enable(as->clk);
+ if (ret)
+ return ret;
+ atmel_spi_init(as);
+ clk_disable_unprepare(as->clk);
if (!pm_runtime_suspended(dev)) {
ret = atmel_spi_runtime_resume(dev);
if (ret)
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