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| author | Andrey Yurovsky <yurovsky@gmail.com> | 2018-03-09 14:47:16 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-14 19:28:14 +0100 |
| commit | 80b820cae421a424c2a1cd37bb714c47519086cd (patch) | |
| tree | a29766a701fb9bac48fec2f32129d9241e0dd718 /drivers/nvmem | |
| parent | b7743a9944ed781e233cd63305bf5430d501061f (diff) | |
| download | linux-stable-80b820cae421a424c2a1cd37bb714c47519086cd.tar.gz linux-stable-80b820cae421a424c2a1cd37bb714c47519086cd.tar.bz2 linux-stable-80b820cae421a424c2a1cd37bb714c47519086cd.zip | |
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/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/nvmem/snvs_lpgpr.c | 27 |
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"); |