drivers/input/tegra-kbc.c

12 #include <keyboard.h>
41 	KBC_CLOCK_KHZ		= 32,	/* Keyboard uses a 32KHz clock */
44 /* keyboard controller config and state */
49 	struct kbc_tegra *kbc;		/* tegra keyboard controller */
50 	unsigned char inited;		/* 1 if keyboard has been inited */
54 	 * After init we must wait a short time before polling the keyboard.
55 	 * This gives the tegra keyboard controller time to react after reset
58 	unsigned int init_dly_ms;	/* Delay before we can read keyboard */
65  * reads the keyboard fifo for current keypresses
67  * @param priv		Keyboard private data
110  * @param priv		Keyboard private data
111  * @param fifo_cnt	Number of entries in the keyboard fifo
128  * Check the keyboard controller and emit ASCII characters for any keys that
131  * @param priv		Keyboard private data
144 	 * Once we get here we know the keyboard has been scanned. So if there  in check_for_keys()
157  * @param priv		Keyboard private data
177  * Check the tegra keyboard, and send any keys that are pressed.
195 /* configures keyboard GPIO registers to use the rows and columns */
228  * Start up the keyboard device
237 	 * We will scan at twice the keyboard repeat rate, so that there is  in tegra_kbc_open()
244 	 * Before reading from the keyboard we must wait for the init_dly  in tegra_kbc_open()
270 	debug("%s: Tegra keyboard ready\n", __func__);  in tegra_kbd_start()
276  * Set up the tegra keyboard. This is called by the stdio device handler
278  * We want to do this init when the keyboard is actually used rather than
279  * at start-up, since keyboard input may not currently be selected.
281  * Once the keyboard starts there will be a period during which we must
282  * wait for the keyboard to init. We do this only when a key is first
297 		debug("%s: No keyboard register found\n", __func__);  in tegra_kbd_probe()
302 	/* Decode the keyboard matrix information (16 rows, 8 columns) */  in tegra_kbd_probe()