[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/nvmem/snvs_lpgpr.c b/src/kernel/linux/v4.19/drivers/nvmem/snvs_lpgpr.c
new file mode 100644
index 0000000..c050a23
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/nvmem/snvs_lpgpr.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2015 Pengutronix, Steffen Trumtrar <kernel@pengutronix.de>
+ * Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/nvmem-provider.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#define IMX6Q_SNVS_HPLR 0x00
+#define IMX6Q_SNVS_LPLR 0x34
+#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 {
+ struct device_d *dev;
+ struct regmap *regmap;
+ struct nvmem_config cfg;
+ const struct snvs_lpgpr_cfg *dcfg;
+};
+
+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,
+ size_t bytes)
+{
+ struct snvs_lpgpr_priv *priv = context;
+ const struct snvs_lpgpr_cfg *dcfg = priv->dcfg;
+ unsigned int lock_reg;
+ int ret;
+
+ ret = regmap_read(priv->regmap, dcfg->offset_hplr, &lock_reg);
+ if (ret < 0)
+ return ret;
+
+ 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 & IMX_GPR_HL)
+ return -EPERM;
+
+ return regmap_bulk_write(priv->regmap, dcfg->offset + offset, val,
+ bytes / 4);
+}
+
+static int snvs_lpgpr_read(void *context, unsigned int offset, void *val,
+ size_t bytes)
+{
+ struct snvs_lpgpr_priv *priv = context;
+ const struct snvs_lpgpr_cfg *dcfg = priv->dcfg;
+
+ return regmap_bulk_read(priv->regmap, dcfg->offset + offset,
+ val, bytes / 4);
+}
+
+static int snvs_lpgpr_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ struct device_node *syscon_node;
+ struct snvs_lpgpr_priv *priv;
+ struct nvmem_config *cfg;
+ struct nvmem_device *nvmem;
+ const struct snvs_lpgpr_cfg *dcfg;
+
+ if (!node)
+ return -ENOENT;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dcfg = of_device_get_match_data(dev);
+ if (!dcfg)
+ return -EINVAL;
+
+ syscon_node = of_get_parent(node);
+ if (!syscon_node)
+ return -ENODEV;
+
+ priv->regmap = syscon_node_to_regmap(syscon_node);
+ of_node_put(syscon_node);
+ if (IS_ERR(priv->regmap))
+ return PTR_ERR(priv->regmap);
+
+ priv->dcfg = dcfg;
+
+ cfg = &priv->cfg;
+ cfg->priv = priv;
+ cfg->name = dev_name(dev);
+ cfg->dev = dev;
+ cfg->stride = 4;
+ cfg->word_size = 4;
+ cfg->size = dcfg->size,
+ cfg->owner = THIS_MODULE;
+ cfg->reg_read = snvs_lpgpr_read;
+ cfg->reg_write = snvs_lpgpr_write;
+
+ nvmem = devm_nvmem_register(dev, cfg);
+
+ return PTR_ERR_OR_ZERO(nvmem);
+}
+
+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);
+
+static struct platform_driver snvs_lpgpr_driver = {
+ .probe = snvs_lpgpr_probe,
+ .driver = {
+ .name = "snvs_lpgpr",
+ .of_match_table = snvs_lpgpr_dt_ids,
+ },
+};
+module_platform_driver(snvs_lpgpr_driver);
+
+MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");
+MODULE_DESCRIPTION("Low Power General Purpose Register in i.MX6 and i.MX7 Secure Non-Volatile Storage");
+MODULE_LICENSE("GPL v2");