drivers/nvmem/snvs_lpgpr.c

1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/nvmem-provider.h>
56 	const struct snvs_lpgpr_cfg *dcfg = priv->dcfg;  in snvs_lpgpr_write()
60 	ret = regmap_read(priv->regmap, dcfg->offset_hplr, &lock_reg);  in snvs_lpgpr_write()
65 		return -EPERM;  in snvs_lpgpr_write()
67 	ret = regmap_read(priv->regmap, dcfg->offset_lplr, &lock_reg);  in snvs_lpgpr_write()
72 		return -EPERM;  in snvs_lpgpr_write()
74 	return regmap_bulk_write(priv->regmap, dcfg->offset + offset, val,  in snvs_lpgpr_write()
82 	const struct snvs_lpgpr_cfg *dcfg = priv->dcfg;  in snvs_lpgpr_read()
84 	return regmap_bulk_read(priv->regmap, dcfg->offset + offset,  in snvs_lpgpr_read()
90 	struct device *dev = &pdev->dev;  in snvs_lpgpr_probe()
91 	struct device_node *node = dev->of_node;  in snvs_lpgpr_probe()
99 		return -ENOENT;  in snvs_lpgpr_probe()
103 		return -ENOMEM;  in snvs_lpgpr_probe()
107 		return -EINVAL;  in snvs_lpgpr_probe()
111 		return -ENODEV;  in snvs_lpgpr_probe()
113 	priv->regmap = syscon_node_to_regmap(syscon_node);  in snvs_lpgpr_probe()
115 	if (IS_ERR(priv->regmap))  in snvs_lpgpr_probe()
116 		return PTR_ERR(priv->regmap);  in snvs_lpgpr_probe()
118 	priv->dcfg = dcfg;  in snvs_lpgpr_probe()
120 	cfg = &priv->cfg;  in snvs_lpgpr_probe()
121 	cfg->priv = priv;  in snvs_lpgpr_probe()
122 	cfg->name = dev_name(dev);  in snvs_lpgpr_probe()
123 	cfg->dev = dev;  in snvs_lpgpr_probe()
124 	cfg->stride = 4;  in snvs_lpgpr_probe()
125 	cfg->word_size = 4;  in snvs_lpgpr_probe()
126 	cfg->size = dcfg->size,  in snvs_lpgpr_probe()
127 	cfg->owner = THIS_MODULE;  in snvs_lpgpr_probe()
128 	cfg->reg_read  = snvs_lpgpr_read;  in snvs_lpgpr_probe()
129 	cfg->reg_write = snvs_lpgpr_write;  in snvs_lpgpr_probe()
137 	{ .compatible = "fsl,imx6q-snvs-lpgpr", .data = &snvs_lpgpr_cfg_imx6q },
138 	{ .compatible = "fsl,imx6ul-snvs-lpgpr",
140 	{ .compatible = "fsl,imx7d-snvs-lpgpr",	.data = &snvs_lpgpr_cfg_imx7d },
155 MODULE_DESCRIPTION("Low Power General Purpose Register in i.MX6 and i.MX7 Secure Non-Volatile Stora…