aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/input
diff options
context:
space:
mode:
authorAbraham Arce <x0066660@ti.com>2011-02-23 01:25:59 -0500
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-02-24 00:05:35 -0500
commit5ad567ffbaf208bd35bff4341906346c1a1d4574 (patch)
treec2a41ca83eb92ac7af9cc5aa5f7cd19806b80330 /drivers/input
parent163d27706bb91a648cc292151fc072e1e8cd4b4d (diff)
Input: omap4-keypad - wire up runtime PM handling
Enable Runtime PM functionality in OMAP4 driver based on the following assumptions: - keyboard controller in wakeup domain so it is always on and power impact is minimal; - in OMAP4 the device control is at module/device level and ick/fclk level control is difficult so cutting of clocks will prevent interrupts. Signed-off-by: Abraham Arce <x0066660@ti.com> Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/keyboard/omap4-keypad.c74
1 files changed, 55 insertions, 19 deletions
diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
index 45bd0977d006..c51a3c4a7feb 100644
--- a/drivers/input/keyboard/omap4-keypad.c
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -29,6 +29,7 @@
29#include <linux/io.h> 29#include <linux/io.h>
30#include <linux/input.h> 30#include <linux/input.h>
31#include <linux/slab.h> 31#include <linux/slab.h>
32#include <linux/pm_runtime.h>
32 33
33#include <plat/omap4-keypad.h> 34#include <plat/omap4-keypad.h>
34 35
@@ -80,20 +81,6 @@ struct omap4_keypad {
80 unsigned short keymap[]; 81 unsigned short keymap[];
81}; 82};
82 83
83static void __devinit omap4_keypad_config(struct omap4_keypad *keypad_data)
84{
85 __raw_writel(OMAP4_VAL_FUNCTIONALCFG,
86 keypad_data->base + OMAP4_KBD_CTRL);
87 __raw_writel(OMAP4_VAL_DEBOUNCINGTIME,
88 keypad_data->base + OMAP4_KBD_DEBOUNCINGTIME);
89 __raw_writel(OMAP4_VAL_IRQDISABLE,
90 keypad_data->base + OMAP4_KBD_IRQSTATUS);
91 __raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN | OMAP4_DEF_IRQENABLE_LONGKEY,
92 keypad_data->base + OMAP4_KBD_IRQENABLE);
93 __raw_writel(OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA,
94 keypad_data->base + OMAP4_KBD_WAKEUPENABLE);
95}
96
97/* Interrupt handler */ 84/* Interrupt handler */
98static irqreturn_t omap4_keypad_interrupt(int irq, void *dev_id) 85static irqreturn_t omap4_keypad_interrupt(int irq, void *dev_id)
99{ 86{
@@ -144,6 +131,49 @@ static irqreturn_t omap4_keypad_interrupt(int irq, void *dev_id)
144 return IRQ_HANDLED; 131 return IRQ_HANDLED;
145} 132}
146 133
134static int omap4_keypad_open(struct input_dev *input)
135{
136 struct omap4_keypad *keypad_data = input_get_drvdata(input);
137
138 pm_runtime_get_sync(input->dev.parent);
139
140 disable_irq(keypad_data->irq);
141
142 __raw_writel(OMAP4_VAL_FUNCTIONALCFG,
143 keypad_data->base + OMAP4_KBD_CTRL);
144 __raw_writel(OMAP4_VAL_DEBOUNCINGTIME,
145 keypad_data->base + OMAP4_KBD_DEBOUNCINGTIME);
146 __raw_writel(OMAP4_VAL_IRQDISABLE,
147 keypad_data->base + OMAP4_KBD_IRQSTATUS);
148 __raw_writel(OMAP4_DEF_IRQENABLE_EVENTEN | OMAP4_DEF_IRQENABLE_LONGKEY,
149 keypad_data->base + OMAP4_KBD_IRQENABLE);
150 __raw_writel(OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA,
151 keypad_data->base + OMAP4_KBD_WAKEUPENABLE);
152
153 enable_irq(keypad_data->irq);
154
155 return 0;
156}
157
158static void omap4_keypad_close(struct input_dev *input)
159{
160 struct omap4_keypad *keypad_data = input_get_drvdata(input);
161
162 disable_irq(keypad_data->irq);
163
164 /* Disable interrupts */
165 __raw_writel(OMAP4_VAL_IRQDISABLE,
166 keypad_data->base + OMAP4_KBD_IRQENABLE);
167
168 /* clear pending interrupts */
169 __raw_writel(__raw_readl(keypad_data->base + OMAP4_KBD_IRQSTATUS),
170 keypad_data->base + OMAP4_KBD_IRQSTATUS);
171
172 enable_irq(keypad_data->irq);
173
174 pm_runtime_put_sync(input->dev.parent);
175}
176
147static int __devinit omap4_keypad_probe(struct platform_device *pdev) 177static int __devinit omap4_keypad_probe(struct platform_device *pdev)
148{ 178{
149 const struct omap4_keypad_platform_data *pdata; 179 const struct omap4_keypad_platform_data *pdata;
@@ -225,6 +255,9 @@ static int __devinit omap4_keypad_probe(struct platform_device *pdev)
225 input_dev->id.product = 0x0001; 255 input_dev->id.product = 0x0001;
226 input_dev->id.version = 0x0001; 256 input_dev->id.version = 0x0001;
227 257
258 input_dev->open = omap4_keypad_open;
259 input_dev->close = omap4_keypad_close;
260
228 input_dev->keycode = keypad_data->keymap; 261 input_dev->keycode = keypad_data->keymap;
229 input_dev->keycodesize = sizeof(keypad_data->keymap[0]); 262 input_dev->keycodesize = sizeof(keypad_data->keymap[0]);
230 input_dev->keycodemax = max_keys; 263 input_dev->keycodemax = max_keys;
@@ -239,8 +272,6 @@ static int __devinit omap4_keypad_probe(struct platform_device *pdev)
239 matrix_keypad_build_keymap(pdata->keymap_data, row_shift, 272 matrix_keypad_build_keymap(pdata->keymap_data, row_shift,
240 input_dev->keycode, input_dev->keybit); 273 input_dev->keycode, input_dev->keybit);
241 274
242 omap4_keypad_config(keypad_data);
243
244 error = request_irq(keypad_data->irq, omap4_keypad_interrupt, 275 error = request_irq(keypad_data->irq, omap4_keypad_interrupt,
245 IRQF_TRIGGER_RISING, 276 IRQF_TRIGGER_RISING,
246 "omap4-keypad", keypad_data); 277 "omap4-keypad", keypad_data);
@@ -249,17 +280,19 @@ static int __devinit omap4_keypad_probe(struct platform_device *pdev)
249 goto err_free_input; 280 goto err_free_input;
250 } 281 }
251 282
283 pm_runtime_enable(&pdev->dev);
284
252 error = input_register_device(keypad_data->input); 285 error = input_register_device(keypad_data->input);
253 if (error < 0) { 286 if (error < 0) {
254 dev_err(&pdev->dev, "failed to register input device\n"); 287 dev_err(&pdev->dev, "failed to register input device\n");
255 goto err_free_irq; 288 goto err_pm_disable;
256 } 289 }
257 290
258
259 platform_set_drvdata(pdev, keypad_data); 291 platform_set_drvdata(pdev, keypad_data);
260 return 0; 292 return 0;
261 293
262err_free_irq: 294err_pm_disable:
295 pm_runtime_disable(&pdev->dev);
263 free_irq(keypad_data->irq, keypad_data); 296 free_irq(keypad_data->irq, keypad_data);
264err_free_input: 297err_free_input:
265 input_free_device(input_dev); 298 input_free_device(input_dev);
@@ -278,6 +311,9 @@ static int __devexit omap4_keypad_remove(struct platform_device *pdev)
278 struct resource *res; 311 struct resource *res;
279 312
280 free_irq(keypad_data->irq, keypad_data); 313 free_irq(keypad_data->irq, keypad_data);
314
315 pm_runtime_disable(&pdev->dev);
316
281 input_unregister_device(keypad_data->input); 317 input_unregister_device(keypad_data->input);
282 318
283 iounmap(keypad_data->base); 319 iounmap(keypad_data->base);