[PATCH 3/3] ti-tscadc-dt: Create ti-tscadc-dt DT adapter device

[Pantelis Antoniou <panto@antoniou-consulting.com>]

omap_device is going private.

Move the ti-tscadc-dt adapter device to arch/arm/mach-omap2.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
---
 arch/arm/mach-omap2/Makefile       |   1 +
 arch/arm/mach-omap2/ti-tscadc-dt.c | 155 +++++++++++++++++++++++++++++++++++++
 2 files changed, 156 insertions(+)
 create mode 100644 arch/arm/mach-omap2/ti-tscadc-dt.c

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 3a9a0ff..1eab37b 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -202,6 +202,7 @@ endif
 
 # AM3XX Device Tree adapters for legacy drivers
 obj-$(CONFIG_SOC_AM33XX)		+= da8xx-dt.o
+obj-$(CONFIG_SOC_AM33XX)		+= ti-tscadc-dt.o
 
 # Specific board support
 obj-$(CONFIG_MACH_OMAP_GENERIC)		+= board-generic.o
diff --git a/arch/arm/mach-omap2/ti-tscadc-dt.c b/arch/arm/mach-omap2/ti-tscadc-dt.c
new file mode 100644
index 0000000..0a1a17a
--- /dev/null
+++ b/arch/arm/mach-omap2/ti-tscadc-dt.c
@@ -0,0 +1,155 @@
+/*
+ * TI-TSCADC-DT: Device tree adapter using the legacy driver
+ *
+ * Copyright (C) 2012 Pantelis Antoniou <panto@antoniou-consulting.com>
+ * Copyright (C) 2012 Texas Instruments Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/clk.h>
+#include <linux/input/ti_am335x_tsc.h>
+#include <linux/platform_data/ti_am335x_adc.h>
+#include <linux/mfd/ti_am335x_tscadc.h>
+#include <plat/clock.h>
+#include <plat/omap_device.h>
+
+struct ti_tscadc_priv {
+	struct omap_hwmod *tsc_oh;
+	struct tsc_data tsc_data;
+	struct adc_data adc_data;
+	struct mfd_tscadc_board tscadc_data;
+	struct platform_device *tscadc_pdev;
+};
+
+static const struct of_device_id of_ti_tscadc_dt_match[] = {
+	{ .compatible = "ti-tscadc-dt", },
+	{},
+};
+
+static int __devinit ti_tscadc_dt_probe(struct platform_device *pdev)
+{
+	struct ti_tscadc_priv *priv;
+	struct pinctrl *pinctrl;
+	u32 val;
+	int ret;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (priv == NULL) {
+		dev_err(&pdev->dev, "Failed to allocate priv\n");
+		return -ENOMEM;
+	}
+
+	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+	if (IS_ERR(pinctrl))
+		dev_warn(&pdev->dev,
+			"pins are not configured from the driver\n");
+
+	ret = of_property_read_u32(pdev->dev.of_node, "tsc-wires", &val);
+	if (ret != 0) {
+		dev_info(&pdev->dev, "no tsc-wires property; disabling TSC\n");
+		val = 0;
+	}
+	priv->tsc_data.wires = val;
+
+	if (priv->tsc_data.wires > 0) {
+		ret = of_property_read_u32(pdev->dev.of_node,
+				"tsc-x-plate-resistance", &val);
+		if (ret != 0) {
+			dev_err(&pdev->dev, "Failed to read "
+					"tsc-x-plate-resistance property\n");
+			return ret;
+		}
+		priv->tsc_data.x_plate_resistance = val;
+
+		ret = of_property_read_u32(pdev->dev.of_node,
+				"tsc-steps", &val);
+		if (ret != 0) {
+			dev_err(&pdev->dev, "Failed to read "
+					"tsc-steps property\n");
+			return ret;
+		}
+		priv->tsc_data.steps_to_configure = val;
+	}
+
+	ret = of_property_read_u32(pdev->dev.of_node, "adc-channels", &val);
+	if (ret != 0) {
+		dev_info(&pdev->dev, "No adc-channels property; "
+				"disabling adc\n");
+		val = 0;
+	}
+	priv->adc_data.adc_channels = val;
+
+	priv->tscadc_data.tsc_init = &priv->tsc_data;
+	priv->tscadc_data.adc_init = &priv->adc_data;
+
+	priv->tsc_oh = omap_hwmod_lookup("adc_tsc");
+	if (priv->tsc_oh == NULL) {
+		dev_err(&pdev->dev, "Could not lookup HWMOD %s\n", "adc_tsc");
+		return -ENODEV;
+	}
+
+	priv->tscadc_pdev = omap_device_build("ti_tscadc", -1, priv->tsc_oh,
+			&priv->tscadc_data, sizeof(priv->tscadc_data),
+			NULL, 0, 0);
+	if (priv->tscadc_pdev == NULL) {
+		dev_err(&pdev->dev, "Could not create tsc_adc device\n");
+		return -ENODEV;
+	}
+
+	dev_info(&pdev->dev, "TI tscadc pdev created OK\n");
+
+	platform_set_drvdata(pdev, priv);
+
+	return 0;
+}
+
+static int __devexit ti_tscadc_dt_remove(struct platform_device *pdev)
+{
+	return -EINVAL;	/* not supporting removal yet */
+}
+
+static struct platform_driver ti_tscadc_dt_driver = {
+	.probe		= ti_tscadc_dt_probe,
+	.remove		= __devexit_p(ti_tscadc_dt_remove),
+	.driver		= {
+		.name	= "ti_tscadc-dt",
+		.owner	= THIS_MODULE,
+		.of_match_table = of_ti_tscadc_dt_match,
+	},
+};
+
+static __init int ti_tscadc_dt_init(void)
+{
+	return platform_driver_register(&ti_tscadc_dt_driver);
+}
+
+static __exit void ti_tscadc_dt_exit(void)
+{
+	platform_driver_unregister(&ti_tscadc_dt_driver);
+}
+
+postcore_initcall(ti_tscadc_dt_init);
+module_exit(ti_tscadc_dt_exit);
-- 
1.7.12