From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lukasz Majewski Subject: [PATCH v3 3/3] input: touchscreen mc13xxx: Add mc34708 support Date: Wed, 17 Jul 2019 00:19:29 +0200 Message-ID: <20190716221929.3782-4-lukma@denx.de> References: <20190716221929.3782-1-lukma@denx.de> Return-path: In-Reply-To: <20190716221929.3782-1-lukma@denx.de> Sender: linux-kernel-owner@vger.kernel.org To: Lee Jones Cc: linux-kernel@vger.kernel.org, Dmitry Torokhov , Sascha Hauer , Enrico Weigelt , Thomas Gleixner , Kate Stewart , linux-input@vger.kernel.org, Lukasz Majewski List-Id: linux-input@vger.kernel.org From: Sascha Hauer The mc34708 has a different bit to enable pen detection. This adds the driver data and devtype necessary to probe the device and to distinguish between the mc13783 and the mc34708. Signed-off-by: Sascha Hauer Signed-off-by: Lukasz Majewski --- Changes for v3: - Replace forward declaration of mc13xxx_driver_data with structure definition - Rename mc13xxx_driver_data with mc13xxx_chip - Move static struct mc13xxx_chip mc13783_chip and mc34708_chip closer to ID table - Do not check mc13xxx device type Changes for v2: - Change nested if statements to a single one (with cr0 > ...) - Replace hardcoded max resistance value (4080) with a generic driver data value. - Introduce new include/linux/mfd/mc34708.h header file for mc34708 specific defines - Define as driver data mask and value for accessing mc13xxx registers Changes from the original patch: - Simplify the mcXXXXX_set_pen_detection functions - Fix checkpatch warnings --- drivers/input/touchscreen/mc13783_ts.c | 56 +++++++++++++++++++++++++++++++--- 1 file changed, 52 insertions(+), 4 deletions(-) diff --git a/drivers/input/touchscreen/mc13783_ts.c b/drivers/input/touchscreen/mc13783_ts.c index edd49e44e0c9..857c11235141 100644 --- a/drivers/input/touchscreen/mc13783_ts.c +++ b/drivers/input/touchscreen/mc13783_ts.c @@ -10,6 +10,7 @@ */ #include #include +#include #include #include #include @@ -30,6 +31,18 @@ MODULE_PARM_DESC(sample_tolerance, "is supposed to be wrong and is discarded. Set to 0 to " "disable this check."); +enum mc13xxx_type { + MC13XXX_TYPE_MC13783, + MC13XXX_TYPE_MC34708, +}; + +struct mc13xxx_chip { + enum mc13xxx_type type; + int max_resistance; + u32 reg_mask; + u32 reg_value; +}; + struct mc13783_ts_priv { struct input_dev *idev; struct mc13xxx *mc13xxx; @@ -37,6 +50,7 @@ struct mc13783_ts_priv { unsigned int sample[4]; u8 ato; bool atox; + const struct mc13xxx_chip *chip; }; static irqreturn_t mc13783_ts_handler(int irq, void *data) @@ -93,6 +107,9 @@ static void mc13783_ts_report_sample(struct mc13783_ts_priv *priv) cr0 = (cr0 + cr1) / 2; + if (cr0 > priv->chip->max_resistance) + cr0 = 0; + if (!cr0 || !sample_tolerance || (x2 - x0 < sample_tolerance && y2 - y0 < sample_tolerance)) { @@ -102,14 +119,14 @@ static void mc13783_ts_report_sample(struct mc13783_ts_priv *priv) input_report_abs(idev, ABS_Y, y1); dev_dbg(&idev->dev, "report (%d, %d, %d)\n", - x1, y1, 0x1000 - cr0); + x1, y1, priv->chip->max_resistance - cr0); schedule_delayed_work(&priv->work, HZ / 50); } else { dev_dbg(&idev->dev, "report release\n"); } input_report_abs(idev, ABS_PRESSURE, - cr0 ? 0x1000 - cr0 : cr0); + cr0 ? priv->chip->max_resistance - cr0 : 0); input_report_key(idev, BTN_TOUCH, cr0); input_sync(idev); } else { @@ -146,7 +163,8 @@ static int mc13783_ts_open(struct input_dev *dev) goto out; ret = mc13xxx_reg_rmw(priv->mc13xxx, MC13XXX_ADC0, - MC13XXX_ADC0_TSMOD_MASK, MC13XXX_ADC0_TSMOD0); + priv->chip->reg_mask, + priv->chip->reg_value); if (ret) mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TS, priv); out: @@ -160,7 +178,7 @@ static void mc13783_ts_close(struct input_dev *dev) mc13xxx_lock(priv->mc13xxx); mc13xxx_reg_rmw(priv->mc13xxx, MC13XXX_ADC0, - MC13XXX_ADC0_TSMOD_MASK, 0); + priv->chip->reg_mask, 0); mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TS, priv); mc13xxx_unlock(priv->mc13xxx); @@ -172,6 +190,7 @@ static int __init mc13783_ts_probe(struct platform_device *pdev) struct mc13783_ts_priv *priv; struct mc13xxx_ts_platform_data *pdata = dev_get_platdata(&pdev->dev); struct input_dev *idev; + const struct platform_device_id *id = platform_get_device_id(pdev); int ret = -ENOMEM; priv = kzalloc(sizeof(*priv), GFP_KERNEL); @@ -182,6 +201,7 @@ static int __init mc13783_ts_probe(struct platform_device *pdev) INIT_DELAYED_WORK(&priv->work, mc13783_ts_work); priv->mc13xxx = dev_get_drvdata(pdev->dev.parent); priv->idev = idev; + priv->chip = (void *)id->driver_data; if (pdata) { priv->atox = pdata->atox; @@ -228,7 +248,35 @@ static int mc13783_ts_remove(struct platform_device *pdev) return 0; } +static struct mc13xxx_chip mc13783_chip = { + .type = MC13XXX_TYPE_MC13783, + .max_resistance = 4096, + .reg_mask = MC13XXX_ADC0_TSMOD_MASK, + .reg_value = MC13XXX_ADC0_TSMOD0, +}; + +static struct mc13xxx_chip mc34708_chip = { + .type = MC13XXX_TYPE_MC34708, + .max_resistance = 4080, + .reg_mask = MC34708_ADC0_TSMASK, + .reg_value = MC34708_ADC0_TSPENDETEN, +}; + +static const struct platform_device_id mc13xxx_ts_idtable[] = { + { + .name = "mc13783-ts", + .driver_data = (kernel_ulong_t)&mc13783_chip, + }, { + .name = "mc34708-ts", + .driver_data = (kernel_ulong_t)&mc34708_chip, + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(platform, mc13xxx_ts_idtable); + static struct platform_driver mc13783_ts_driver = { + .id_table = mc13xxx_ts_idtable, .remove = mc13783_ts_remove, .driver = { .name = MC13783_TS_NAME, -- 2.11.0