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authorAndrey Yurovsky <yurovsky@gmail.com>2018-03-09 14:47:16 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-14 19:28:14 +0100
commit80b820cae421a424c2a1cd37bb714c47519086cd (patch)
treea29766a701fb9bac48fec2f32129d9241e0dd718 /drivers/nvmem
parentb7743a9944ed781e233cd63305bf5430d501061f (diff)
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nvmem: add i.MX7 support to snvs-lpgpr
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@gmail.com> Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
-rw-r--r--drivers/nvmem/Kconfig4
-rw-r--r--drivers/nvmem/snvs_lpgpr.c27
2 files changed, 23 insertions, 8 deletions
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 92e1e41d128e..c050a23a9f2b 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;
@@ -126,6 +140,7 @@ 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);
@@ -140,5 +155,5 @@ static struct platform_driver snvs_lpgpr_driver = {
module_platform_driver(snvs_lpgpr_driver);
MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");
-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");