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path: root/drivers/mtd/nand/raw/denali_dt.c
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Diffstat (limited to 'drivers/mtd/nand/raw/denali_dt.c')
-rw-r--r--drivers/mtd/nand/raw/denali_dt.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/denali_dt.c b/drivers/mtd/nand/raw/denali_dt.c
new file mode 100644
index 000000000000..cfd33e6ca77f
--- /dev/null
+++ b/drivers/mtd/nand/raw/denali_dt.c
@@ -0,0 +1,163 @@
+/*
+ * NAND Flash Controller Device Driver for DT
+ *
+ * Copyright © 2011, Picochip.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include "denali.h"
+
+struct denali_dt {
+ struct denali_nand_info denali;
+ struct clk *clk;
+};
+
+struct denali_dt_data {
+ unsigned int revision;
+ unsigned int caps;
+ const struct nand_ecc_caps *ecc_caps;
+};
+
+NAND_ECC_CAPS_SINGLE(denali_socfpga_ecc_caps, denali_calc_ecc_bytes,
+ 512, 8, 15);
+static const struct denali_dt_data denali_socfpga_data = {
+ .caps = DENALI_CAP_HW_ECC_FIXUP,
+ .ecc_caps = &denali_socfpga_ecc_caps,
+};
+
+NAND_ECC_CAPS_SINGLE(denali_uniphier_v5a_ecc_caps, denali_calc_ecc_bytes,
+ 1024, 8, 16, 24);
+static const struct denali_dt_data denali_uniphier_v5a_data = {
+ .caps = DENALI_CAP_HW_ECC_FIXUP |
+ DENALI_CAP_DMA_64BIT,
+ .ecc_caps = &denali_uniphier_v5a_ecc_caps,
+};
+
+NAND_ECC_CAPS_SINGLE(denali_uniphier_v5b_ecc_caps, denali_calc_ecc_bytes,
+ 1024, 8, 16);
+static const struct denali_dt_data denali_uniphier_v5b_data = {
+ .revision = 0x0501,
+ .caps = DENALI_CAP_HW_ECC_FIXUP |
+ DENALI_CAP_DMA_64BIT,
+ .ecc_caps = &denali_uniphier_v5b_ecc_caps,
+};
+
+static const struct of_device_id denali_nand_dt_ids[] = {
+ {
+ .compatible = "altr,socfpga-denali-nand",
+ .data = &denali_socfpga_data,
+ },
+ {
+ .compatible = "socionext,uniphier-denali-nand-v5a",
+ .data = &denali_uniphier_v5a_data,
+ },
+ {
+ .compatible = "socionext,uniphier-denali-nand-v5b",
+ .data = &denali_uniphier_v5b_data,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
+
+static int denali_dt_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct denali_dt *dt;
+ const struct denali_dt_data *data;
+ struct denali_nand_info *denali;
+ int ret;
+
+ dt = devm_kzalloc(&pdev->dev, sizeof(*dt), GFP_KERNEL);
+ if (!dt)
+ return -ENOMEM;
+ denali = &dt->denali;
+
+ data = of_device_get_match_data(&pdev->dev);
+ if (data) {
+ denali->revision = data->revision;
+ denali->caps = data->caps;
+ denali->ecc_caps = data->ecc_caps;
+ }
+
+ denali->dev = &pdev->dev;
+ denali->irq = platform_get_irq(pdev, 0);
+ if (denali->irq < 0) {
+ dev_err(&pdev->dev, "no irq defined\n");
+ return denali->irq;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "denali_reg");
+ denali->reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(denali->reg))
+ return PTR_ERR(denali->reg);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_data");
+ denali->host = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(denali->host))
+ return PTR_ERR(denali->host);
+
+ dt->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(dt->clk)) {
+ dev_err(&pdev->dev, "no clk available\n");
+ return PTR_ERR(dt->clk);
+ }
+ ret = clk_prepare_enable(dt->clk);
+ if (ret)
+ return ret;
+
+ denali->clk_x_rate = clk_get_rate(dt->clk);
+
+ ret = denali_init(denali);
+ if (ret)
+ goto out_disable_clk;
+
+ platform_set_drvdata(pdev, dt);
+ return 0;
+
+out_disable_clk:
+ clk_disable_unprepare(dt->clk);
+
+ return ret;
+}
+
+static int denali_dt_remove(struct platform_device *pdev)
+{
+ struct denali_dt *dt = platform_get_drvdata(pdev);
+
+ denali_remove(&dt->denali);
+ clk_disable_unprepare(dt->clk);
+
+ return 0;
+}
+
+static struct platform_driver denali_dt_driver = {
+ .probe = denali_dt_probe,
+ .remove = denali_dt_remove,
+ .driver = {
+ .name = "denali-nand-dt",
+ .of_match_table = denali_nand_dt_ids,
+ },
+};
+module_platform_driver(denali_dt_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jamie Iles");
+MODULE_DESCRIPTION("DT driver for Denali NAND controller");