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


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