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Message-Id: <1351783082-11411-4-git-send-email-panto@antoniou-consulting.com>
Date: Thu, 1 Nov 2012 17:18:02 +0200
From: Pantelis Antoniou <panto@...oniou-consulting.com>
To: Tony Lindgren <tony@...mide.com>
Cc: Pantelis Antoniou <panto@...oniou-consulting.com>,
linux-kernel@...r.kernel.org,
Koen Kooi <koen@...inion.thruhere.net>,
Matt Porter <mporter@...com>, Russ Dill <Russ.Dill@...com>,
linux-omap@...r.kernel.org
Subject: [PATCH 3/3] ti-tscadc-dt: Create ti-tscadc-dt DT adapter device
omap_device is going private.
Move the ti-tscadc-dt adapter device to arch/arm/mach-omap2.
Signed-off-by: Pantelis Antoniou <panto@...oniou-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@...oniou-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
--
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