Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755038Ab0DNTX1 (ORCPT ); Wed, 14 Apr 2010 15:23:27 -0400 Received: from mail.perches.com ([173.55.12.10]:1480 "EHLO mail.perches.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751504Ab0DNTXY (ORCPT ); Wed, 14 Apr 2010 15:23:24 -0400 Subject: Re: cy8ctmg110 for review From: Joe Perches To: Alan Cox , Samuli Konttila Cc: linux-i2c@vger.kernel.org, khali@linux-fr.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20100414125234.23507.42816.stgit@localhost.localdomain> References: <20100414125234.23507.42816.stgit@localhost.localdomain> Content-Type: text/plain; charset="UTF-8" Date: Wed, 14 Apr 2010 12:23:19 -0700 Message-ID: <1271272999.1833.3.camel@Joe-Laptop.home> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 12687 Lines: 418 On Wed, 2010-04-14 at 13:54 +0100, Alan Cox wrote: > Subject: [FOR COMMENT] cy8ctmg110 for review > > From: Samuli Konttila > Add support for the cy8ctmg110 capacitive touchscreen used on some embedded > devices. > > (Some clean up by Alan Cox) Some more cleanups. Still not signed. Cleanup includes Cleanup typos Remove a few used-once #defines Cleanup logging drivers/input/touchscreen/cy8ctmg110_ts.c | 145 ++++++++++++---------------- 1 files changed, 62 insertions(+), 83 deletions(-) diff --git a/drivers/input/touchscreen/cy8ctmg110_ts.c b/drivers/input/touchscreen/cy8ctmg110_ts.c index 4adbe87..ea41f97 100644 --- a/drivers/input/touchscreen/cy8ctmg110_ts.c +++ b/drivers/input/touchscreen/cy8ctmg110_ts.c @@ -16,57 +16,48 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include #include #include #include #include -#include #include #include #include #include - -#include -#include -#include -#include -#include +#include #include -#include +#include #include #include #include -#include -#include -#include -#include -#include - +#include +#include +#include #define CY8CTMG110_DRIVER_NAME "cy8ctmg110" - -/*HW definations*/ +/* HW definitions */ #define CY8CTMG110_RESET_PIN_GPIO 43 #define CY8CTMG110_IRQ_PIN_GPIO 59 #define CY8CTMG110_I2C_ADDR 0x38 #define CY8CTMG110_I2C_ADDR_EXT 0x39 #define CY8CTMG110_I2C_ADDR_ 0x2 /*i2c address first sample */ -#define CY8CTMG110_I2C_ADDR__ 53 /*i2c address to FW where irq support missing */ +#define CY8CTMG110_I2C_ADDR__ 53 /*i2c address to FW where + irq support missing */ #define CY8CTMG110_TOUCH_IRQ 21 -#define CY8CTMG110_TOUCH_LENGHT 9787 -#define CY8CTMG110_SCREEN_LENGHT 8424 - +#define CY8CTMG110_TOUCH_LENGTH 9787 +#define CY8CTMG110_SCREEN_LENGTH 8424 -/*Touch coordinates*/ +/* Touch coordinates */ #define CY8CTMG110_X_MIN 0 #define CY8CTMG110_Y_MIN 0 #define CY8CTMG110_X_MAX 864 #define CY8CTMG110_Y_MAX 480 - -/*cy8ctmg110 registers defination*/ +/* cy8ctmg110 registers definition */ #define CY8CTMG110_TOUCH_WAKEUP_TIME 0 #define CY8CTMG110_TOUCH_SLEEP_TIME 2 #define CY8CTMG110_TOUCH_X1 3 @@ -77,21 +68,17 @@ #define CY8CTMG110_GESTURE 12 #define CY8CTMG110_REG_MAX 13 -#define CY8CTMG110_POLL_TIMER_DELAY 1000*1000*100 +#define CY8CTMG110_POLL_TIMER_DELAY (1000 * 1000 * 100) #define TOUCH_MAX_I2C_FAILS 50 -/* Scale factors for coordinates */ -#define X_SCALE_FACTOR 9387/8424 -#define Y_SCALE_FACTOR 97/100 - /* For tracing */ -static int g_y_trace_coord = 0; +static int g_y_trace_coord; module_param(g_y_trace_coord, int, 0600); /* Polling mode */ -static int polling = 0; +static int polling; module_param(polling, int, 0); -MODULE_PARM_DESC(polling, "Set to enabling polling of the touchscreen"); +MODULE_PARM_DESC(polling, "Set to enable polling of the touchscreen"); /* @@ -102,7 +89,7 @@ struct ts_event { int y1; int x2; int y2; - bool event_sended; + bool event_sent; }; /* @@ -122,8 +109,8 @@ struct cy8ctmg110 { }; /* - * cy8ctmg110_poweroff is the routine that is called when touch hardware - * will powered off + * cy8ctmg110_poweroff is the routine that is called + * when touch hardware will be powered off */ static void cy8ctmg110_power(bool poweron) { @@ -135,7 +122,6 @@ static void cy8ctmg110_power(bool poweron) /* * cy8ctmg110_write_req write regs to the i2c devices - * */ static int cy8ctmg110_write_req(struct cy8ctmg110 *tsc, unsigned char reg, unsigned char len, unsigned char *value) @@ -152,7 +138,7 @@ static int cy8ctmg110_write_req(struct cy8ctmg110 *tsc, unsigned char reg, ret = i2c_transfer(client->adapter, msg, 1); if (ret != 1) { - printk("cy8ctmg110 touch : i2c write data cmd failed \n"); + pr_err("i2c write data cmd failed\n"); return ret; } return 0; @@ -160,9 +146,7 @@ static int cy8ctmg110_write_req(struct cy8ctmg110 *tsc, unsigned char reg, /* * cy8ctmg110_read_req read regs from i2c devise - * */ - static int cy8ctmg110_read_req(struct cy8ctmg110 *tsc, unsigned char *i2c_data, unsigned char len, unsigned char cmd) { @@ -208,23 +192,23 @@ static void cy8ctmg110_send_event(void *tsc) x = ts->tc.x1; y = ts->tc.y1; - if (ts->tc.event_sended == false) { + if (!ts->tc.event_sent) { input_report_key(input, BTN_TOUCH, 1); ts->pending = true; - x2 = (u16) (y * X_SCALE_FACTOR); - y2 = (u16) (x * Y_SCALE_FACTOR); + x2 = (u16)(y * 9387 / 8424); + y2 = (u16)(x * 97 / 100); input_report_abs(input, ABS_X, x2); input_report_abs(input, ABS_Y, y2); input_sync(input); if (g_y_trace_coord) - printk("cy8ctmg110 touch position X:%d (was = %d) Y:%d (was = %d)\n", x2, y, y2, x); + pr_info("position X:%d (was = %d) Y:%d (was = %d)\n", + x2, y, y2, x); } } /* * cy8ctmg110_touch_pos check touch position from i2c devices - * */ static int cy8ctmg110_touch_pos(struct cy8ctmg110 *tsc) { @@ -236,30 +220,29 @@ static int cy8ctmg110_touch_pos(struct cy8ctmg110 *tsc) /*Reading coordinates */ if (cy8ctmg110_read_req(tsc, reg_p, 9, CY8CTMG110_TOUCH_X1) != 0) return -EIO; - + y = reg_p[2] << 8 | reg_p[3]; x = reg_p[0] << 8 | reg_p[1]; /*number of touch */ if (reg_p[8] == 0) { - if (tsc->pending == true) { + if (tsc->pending) { struct input_dev *input = tsc->input; input_report_key(input, BTN_TOUCH, 0); - tsc->tc.event_sended = true; + tsc->tc.event_sent = true; tsc->pending = false; } } else if (tsc->tc.x1 != x || tsc->tc.y1 != y) { tsc->tc.y1 = y; tsc->tc.x1 = x; - tsc->tc.event_sended = false; + tsc->tc.event_sent = false; cy8ctmg110_send_event(tsc); } return 0; } /* - * if interrupt isn't in use the touch positions can reads by polling - * + * if interrupt isn't in use the touch positions can be read by polling */ static enum hrtimer_restart cy8ctmg110_timer(struct hrtimer *handle) { @@ -270,7 +253,9 @@ static enum hrtimer_restart cy8ctmg110_timer(struct hrtimer *handle) cy8ctmg110_touch_pos(ts); if (ts->i2c_fail_count < TOUCH_MAX_I2C_FAILS) - hrtimer_start(&ts->timer, ktime_set(0, CY8CTMG110_POLL_TIMER_DELAY), HRTIMER_MODE_REL); + hrtimer_start(&ts->timer, + ktime_set(0, CY8CTMG110_POLL_TIMER_DELAY), + HRTIMER_MODE_REL); spin_unlock_irqrestore(&ts->lock, flags); return HRTIMER_NORESTART; @@ -278,13 +263,12 @@ static enum hrtimer_restart cy8ctmg110_timer(struct hrtimer *handle) /* * cy8ctmg110_init_controller set init value to touchcontroller - * */ static bool cy8ctmg110_set_sleepmode(struct cy8ctmg110 *ts) { unsigned char reg_p[3]; - if (ts->sleepmode == true) { + if (ts->sleepmode) { reg_p[0] = 0x00; reg_p[1] = 0xff; reg_p[2] = 5; @@ -303,15 +287,13 @@ static bool cy8ctmg110_set_sleepmode(struct cy8ctmg110 *ts) /* * cy8ctmg110_irq_handler irq handling function - * */ - static irqreturn_t cy8ctmg110_irq_handler(int irq, void *dev_id) { struct cy8ctmg110 *tsc = (struct cy8ctmg110 *) dev_id; - if (tsc->initController == false) { - if (cy8ctmg110_set_sleepmode(tsc) == true) + if (!tsc->initController) { + if (cy8ctmg110_set_sleepmode(tsc)) tsc->initController = true; } else cy8ctmg110_touch_pos(tsc); @@ -322,8 +304,8 @@ static irqreturn_t cy8ctmg110_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } - -static int cy8ctmg110_probe(struct i2c_client *client, const struct i2c_device_id *id) +static int cy8ctmg110_probe(struct i2c_client *client, + const struct i2c_device_id *id) { struct cy8ctmg110 *ts; struct input_dev *input_dev; @@ -350,7 +332,7 @@ static int cy8ctmg110_probe(struct i2c_client *client, const struct i2c_device_i ts->sleepmode = false; snprintf(ts->phys, sizeof(ts->phys), "%s/input0", - dev_name(&client->dev)); + dev_name(&client->dev)); input_dev->name = CY8CTMG110_DRIVER_NAME " Touchscreen"; input_dev->phys = ts->phys; @@ -358,20 +340,22 @@ static int cy8ctmg110_probe(struct i2c_client *client, const struct i2c_device_i spin_lock_init(&ts->lock); - input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | - BIT_MASK(EV_REL) | BIT_MASK(EV_ABS); + input_dev->evbit[0] = (BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | + BIT_MASK(EV_REL) | BIT_MASK(EV_ABS)); input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); input_set_capability(input_dev, EV_KEY, KEY_F); - input_set_abs_params(input_dev, ABS_X, CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 0, 0); - input_set_abs_params(input_dev, ABS_Y, CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 0, 0); + input_set_abs_params(input_dev, ABS_X, + CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 0, 0); + input_set_abs_params(input_dev, ABS_Y, + CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 0, 0); err = gpio_request(CY8CTMG110_RESET_PIN_GPIO, NULL); if (err) { - dev_err(&client->dev, "cy8ctmg110_ts: Unable to request GPIO pin %d.\n", - CY8CTMG110_RESET_PIN_GPIO); + dev_err(&client->dev, "Unable to request GPIO pin %d\n", + CY8CTMG110_RESET_PIN_GPIO); goto err_free_irq; } cy8ctmg110_power(true); @@ -385,14 +369,14 @@ static int cy8ctmg110_probe(struct i2c_client *client, const struct i2c_device_i if (polling) hrtimer_start(&ts->timer, ktime_set(10, 0), HRTIMER_MODE_REL); - /* Can we fall back to polling if these bits fail - something to look - at for robustness */ + /* Can we fall back to polling if these bits fail? + - something to look at for robustness */ err = gpio_request(CY8CTMG110_IRQ_PIN_GPIO, "touch_irq_key"); if (err < 0) { dev_err(&client->dev, - "cy8ctmg110_ts: failed to request GPIO %d, error %d\n", - CY8CTMG110_IRQ_PIN_GPIO, err); + "failed to request GPIO %d, error %d\n", + CY8CTMG110_IRQ_PIN_GPIO, err); goto err_free_timer; } @@ -400,8 +384,8 @@ static int cy8ctmg110_probe(struct i2c_client *client, const struct i2c_device_i if (err < 0) { dev_err(&client->dev, - "cy8ctmg110_ts: failed to configure input direction for GPIO %d, error %d\n", - CY8CTMG110_IRQ_PIN_GPIO, err); + "failed to configure input direction for GPIO %d, error %d\n", + CY8CTMG110_IRQ_PIN_GPIO, err); goto err_free_gpio; } client->irq = gpio_to_irq(CY8CTMG110_IRQ_PIN_GPIO); @@ -409,15 +393,16 @@ static int cy8ctmg110_probe(struct i2c_client *client, const struct i2c_device_i if (client->irq < 0) { err = client->irq; dev_err(&client->dev, - "cy8ctmg110_ts: Unable to get irq number" " for GPIO %d, error %d\n", - CY8CTMG110_IRQ_PIN_GPIO, err); + "Unable to get irq number for GPIO %d, error %d\n", + CY8CTMG110_IRQ_PIN_GPIO, err); goto err_free_gpio; } - err = request_irq(client->irq, cy8ctmg110_irq_handler, IRQF_TRIGGER_RISING | IRQF_SHARED, "touch_reset_key", ts); + err = request_irq(client->irq, cy8ctmg110_irq_handler, + IRQF_TRIGGER_RISING | IRQF_SHARED, + "touch_reset_key", ts); if (err < 0) { dev_err(&client->dev, - "cy8ctmg110 irq %d busy? error %d\n", - client->irq, err); + "cy8ctmg110 irq %d busy? error %d\n", client->irq, err); goto err_free_gpio; } @@ -439,9 +424,7 @@ err_free_mem: /* * cy8ctmg110_suspend - * */ - static int cy8ctmg110_suspend(struct i2c_client *client, pm_message_t mesg) { if (device_may_wakeup(&client->dev)) @@ -451,10 +434,8 @@ static int cy8ctmg110_suspend(struct i2c_client *client, pm_message_t mesg) } /* - * cy8ctmg110_resume - * + * cy8ctmg110_resume */ - static int cy8ctmg110_resume(struct i2c_client *client) { if (device_may_wakeup(&client->dev)) @@ -465,9 +446,7 @@ static int cy8ctmg110_resume(struct i2c_client *client) /* * cy8ctmg110_remove - * */ - static int cy8ctmg110_remove(struct i2c_client *client) { struct cy8ctmg110 *ts = i2c_get_clientdata(client); 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