This is a note to let you know that I've just added the patch titled
[PATCH] nvmem: add i.MX7 support to snvs-lpgpr
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nvmem-add-i.mx7-support-to-snvs-lpgpr.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From yurovsky@xxxxxxxxx Thu Jan 11 07:36:10 2018
From: Andrey Yurovsky <yurovsky@xxxxxxxxx>
Date: Wed, 10 Jan 2018 15:47:34 -0800
Subject: [PATCH] nvmem: add i.MX7 support to snvs-lpgpr
To: srinivas.kandagatla@xxxxxxxxxx
Cc: Andrey Yurovsky <yurovsky@xxxxxxxxx>, o.rempel@xxxxxxxxxxxxxx, gregkh@xxxxxxxxxxxxxxxxxxx
Message-ID: <20180110234734.26213-1-yurovsky@xxxxxxxxx>
The i.MX7 family has similar SNVS hardware so make the snvs-lpgpr
support it along with the i.MX6 family. The register interface is the
same except for the number and offset of the general purpose registers.
Signed-off-by: Andrey Yurovsky <yurovsky@xxxxxxxxx>
---
.../devicetree/bindings/nvmem/snvs-lpgpr.txt | 3 ++-
drivers/nvmem/Kconfig | 4 ++--
drivers/nvmem/snvs_lpgpr.c | 27 +++++++++++++++++-----
3 files changed, 25 insertions(+), 9 deletions(-)
diff --git a/Documentation/devicetree/bindings/nvmem/snvs-lpgpr.txt b/Documentation/devicetree/bindings/nvmem/snvs-lpgpr.txt
index 20bc49b49799..3cb170896658 100644
--- a/Documentation/devicetree/bindings/nvmem/snvs-lpgpr.txt
+++ b/Documentation/devicetree/bindings/nvmem/snvs-lpgpr.txt
@@ -1,5 +1,5 @@
Device tree bindings for Low Power General Purpose Register found in i.MX6Q/D
-Secure Non-Volatile Storage.
+and i.MX7 Secure Non-Volatile Storage.
This DT node should be represented as a sub-node of a "syscon",
"simple-mfd" node.
@@ -8,6 +8,7 @@ Required properties:
- compatible: should be one of the fallowing variants:
"fsl,imx6q-snvs-lpgpr" for Freescale i.MX6Q/D/DL/S
"fsl,imx6ul-snvs-lpgpr" for Freescale i.MX6UL
+ "fsl,imx7d-snvs-lpgpr" for Freescale i.MX7D/S
Example:
snvs: snvs@020cc000 {
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig
index ff505af064ba..5f9bc787d634 100644
--- a/drivers/nvmem/Kconfig
+++ b/drivers/nvmem/Kconfig
@@ -167,10 +167,10 @@ config MESON_MX_EFUSE
config NVMEM_SNVS_LPGPR
tristate "Support for Low Power General Purpose Register"
- depends on SOC_IMX6 || COMPILE_TEST
+ depends on SOC_IMX6 || SOC_IMX7D || COMPILE_TEST
help
This is a driver for Low Power General Purpose Register (LPGPR) available on
- i.MX6 SoCs in Secure Non-Volatile Storage (SNVS) of this chip.
+ i.MX6 and i.MX7 SoCs in Secure Non-Volatile Storage (SNVS) of this chip.
This driver can also be built as a module. If so, the module
will be called nvmem-snvs-lpgpr.
diff --git a/drivers/nvmem/snvs_lpgpr.c b/drivers/nvmem/snvs_lpgpr.c
index e5c2a4a17f03..3ed617a16db0 100644
--- a/drivers/nvmem/snvs_lpgpr.c
+++ b/drivers/nvmem/snvs_lpgpr.c
@@ -14,15 +14,21 @@
#include <linux/regmap.h>
#define IMX6Q_SNVS_HPLR 0x00
-#define IMX6Q_GPR_SL BIT(5)
#define IMX6Q_SNVS_LPLR 0x34
-#define IMX6Q_GPR_HL BIT(5)
#define IMX6Q_SNVS_LPGPR 0x68
+#define IMX7D_SNVS_HPLR 0x00
+#define IMX7D_SNVS_LPLR 0x34
+#define IMX7D_SNVS_LPGPR 0x90
+
+#define IMX_GPR_SL BIT(5)
+#define IMX_GPR_HL BIT(5)
+
struct snvs_lpgpr_cfg {
int offset;
int offset_hplr;
int offset_lplr;
+ int size;
};
struct snvs_lpgpr_priv {
@@ -36,6 +42,14 @@ static const struct snvs_lpgpr_cfg snvs_lpgpr_cfg_imx6q = {
.offset = IMX6Q_SNVS_LPGPR,
.offset_hplr = IMX6Q_SNVS_HPLR,
.offset_lplr = IMX6Q_SNVS_LPLR,
+ .size = 4,
+};
+
+static const struct snvs_lpgpr_cfg snvs_lpgpr_cfg_imx7d = {
+ .offset = IMX7D_SNVS_LPGPR,
+ .offset_hplr = IMX7D_SNVS_HPLR,
+ .offset_lplr = IMX7D_SNVS_LPLR,
+ .size = 16,
};
static int snvs_lpgpr_write(void *context, unsigned int offset, void *val,
@@ -50,14 +64,14 @@ static int snvs_lpgpr_write(void *context, unsigned int offset, void *val,
if (ret < 0)
return ret;
- if (lock_reg & IMX6Q_GPR_SL)
+ if (lock_reg & IMX_GPR_SL)
return -EPERM;
ret = regmap_read(priv->regmap, dcfg->offset_lplr, &lock_reg);
if (ret < 0)
return ret;
- if (lock_reg & IMX6Q_GPR_HL)
+ if (lock_reg & IMX_GPR_HL)
return -EPERM;
return regmap_bulk_write(priv->regmap, dcfg->offset + offset, val,
@@ -112,7 +126,7 @@ static int snvs_lpgpr_probe(struct platform_device *pdev)
cfg->dev = dev;
cfg->stride = 4,
cfg->word_size = 4,
- cfg->size = 4,
+ cfg->size = dcfg->size,
cfg->owner = THIS_MODULE,
cfg->reg_read = snvs_lpgpr_read,
cfg->reg_write = snvs_lpgpr_write,
@@ -137,6 +151,7 @@ static const struct of_device_id snvs_lpgpr_dt_ids[] = {
{ .compatible = "fsl,imx6q-snvs-lpgpr", .data = &snvs_lpgpr_cfg_imx6q },
{ .compatible = "fsl,imx6ul-snvs-lpgpr",
.data = &snvs_lpgpr_cfg_imx6q },
+ { .compatible = "fsl,imx7d-snvs-lpgpr", .data = &snvs_lpgpr_cfg_imx7d },
{ },
};
MODULE_DEVICE_TABLE(of, snvs_lpgpr_dt_ids);
@@ -152,5 +167,5 @@ static struct platform_driver snvs_lpgpr_driver = {
module_platform_driver(snvs_lpgpr_driver);
MODULE_AUTHOR("Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>");
-MODULE_DESCRIPTION("Low Power General Purpose Register in i.MX6 Secure Non-Volatile Storage");
+MODULE_DESCRIPTION("Low Power General Purpose Register in i.MX6 and i.MX7 Secure Non-Volatile Storage");
MODULE_LICENSE("GPL v2");
--
2.14.3
Patches currently in stable-queue which might be from yurovsky@xxxxxxxxx are
queue-4.4/nvmem-add-i.mx7-support-to-snvs-lpgpr.patch