diff options
Diffstat (limited to 'drivers/input/keyboard')
| -rw-r--r-- | drivers/input/keyboard/samsung-keypad.c | 173 |
1 files changed, 161 insertions, 12 deletions
diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c index b746fce2d120..17ba7f9f80f3 100644 --- a/drivers/input/keyboard/samsung-keypad.c +++ b/drivers/input/keyboard/samsung-keypad.c @@ -23,6 +23,8 @@ #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_gpio.h> #include <linux/sched.h> #include <linux/input/samsung-keypad.h> @@ -72,31 +74,26 @@ struct samsung_keypad { bool stopped; bool wake_enabled; int irq; + enum samsung_keypad_type type; unsigned int row_shift; unsigned int rows; unsigned int cols; unsigned int row_state[SAMSUNG_MAX_COLS]; +#ifdef CONFIG_OF + int row_gpios[SAMSUNG_MAX_ROWS]; + int col_gpios[SAMSUNG_MAX_COLS]; +#endif unsigned short keycodes[]; }; -static int samsung_keypad_is_s5pv210(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - enum samsung_keypad_type type = - platform_get_device_id(pdev)->driver_data; - - return type == KEYPAD_TYPE_S5PV210; -} - static void samsung_keypad_scan(struct samsung_keypad *keypad, unsigned int *row_state) { - struct device *dev = keypad->input_dev->dev.parent; unsigned int col; unsigned int val; for (col = 0; col < keypad->cols; col++) { - if (samsung_keypad_is_s5pv210(dev)) { + if (keypad->type == KEYPAD_TYPE_S5PV210) { val = S5PV210_KEYIFCOLEN_MASK; val &= ~(1 << col) << 8; } else { @@ -251,6 +248,126 @@ static void samsung_keypad_close(struct input_dev *input_dev) samsung_keypad_stop(keypad); } +#ifdef CONFIG_OF +static struct samsung_keypad_platdata *samsung_keypad_parse_dt( + struct device *dev) +{ + struct samsung_keypad_platdata *pdata; + struct matrix_keymap_data *keymap_data; + uint32_t *keymap, num_rows = 0, num_cols = 0; + struct device_node *np = dev->of_node, *key_np; + unsigned int key_count = 0; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(dev, "could not allocate memory for platform data\n"); + return NULL; + } + + of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows); + of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols); + if (!num_rows || !num_cols) { + dev_err(dev, "number of keypad rows/columns not specified\n"); + return NULL; + } + pdata->rows = num_rows; + pdata->cols = num_cols; + + keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL); + if (!keymap_data) { + dev_err(dev, "could not allocate memory for keymap data\n"); + return NULL; + } + pdata->keymap_data = keymap_data; + + for_each_child_of_node(np, key_np) + key_count++; + + keymap_data->keymap_size = key_count; + keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL); + if (!keymap) { + dev_err(dev, "could not allocate memory for keymap\n"); + return NULL; + } + keymap_data->keymap = keymap; + + for_each_child_of_node(np, key_np) { + u32 row, col, key_code; + of_property_read_u32(key_np, "keypad,row", &row); + of_property_read_u32(key_np, "keypad,column", &col); + of_property_read_u32(key_np, "linux,code", &key_code); + *keymap++ = KEY(row, col, key_code); + } + + if (of_get_property(np, "linux,input-no-autorepeat", NULL)) + pdata->no_autorepeat = true; + if (of_get_property(np, "linux,input-wakeup", NULL)) + pdata->wakeup = true; + + return pdata; +} + +static void samsung_keypad_parse_dt_gpio(struct device *dev, + struct samsung_keypad *keypad) +{ + struct device_node *np = dev->of_node; + int gpio, ret, row, col; + + for (row = 0; row < keypad->rows; row++) { + gpio = of_get_named_gpio(np, "row-gpios", row); + keypad->row_gpios[row] = gpio; + if (!gpio_is_valid(gpio)) { + dev_err(dev, "keypad row[%d]: invalid gpio %d\n", + row, gpio); + continue; + } + + ret = gpio_request(gpio, "keypad-row"); + if (ret) + dev_err(dev, "keypad row[%d] gpio request failed\n", + row); + } + + for (col = 0; col < keypad->cols; col++) { + gpio = of_get_named_gpio(np, "col-gpios", col); + keypad->col_gpios[col] = gpio; + if (!gpio_is_valid(gpio)) { + dev_err(dev, "keypad column[%d]: invalid gpio %d\n", + col, gpio); + continue; + } + + ret = gpio_request(gpio, "keypad-col"); + if (ret) + dev_err(dev, "keypad column[%d] gpio request failed\n", + col); + } +} + +static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad) +{ + int cnt; + + for (cnt = 0; cnt < keypad->rows; cnt++) + if (gpio_is_valid(keypad->row_gpios[cnt])) + gpio_free(keypad->row_gpios[cnt]); + + for (cnt = 0; cnt < keypad->cols; cnt++) + if (gpio_is_valid(keypad->col_gpios[cnt])) + gpio_free(keypad->col_gpios[cnt]); +} +#else +static +struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev) +{ + return NULL; +} + +static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad) +{ +} +#endif + static int __devinit samsung_keypad_probe(struct platform_device *pdev) { const struct samsung_keypad_platdata *pdata; @@ -262,7 +379,10 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev) unsigned int keymap_size; int error; - pdata = pdev->dev.platform_data; + if (pdev->dev.of_node) + pdata = samsung_keypad_parse_dt(&pdev->dev); + else + pdata = pdev->dev.platform_data; if (!pdata) { dev_err(&pdev->dev, "no platform data defined\n"); return -EINVAL; @@ -321,6 +441,16 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev) keypad->stopped = true; init_waitqueue_head(&keypad->wait); + if (pdev->dev.of_node) { +#ifdef CONFIG_OF + samsung_keypad_parse_dt_gpio(&pdev->dev, keypad); + keypad->type = of_device_is_compatible(pdev->dev.of_node, + "samsung,s5pv210-keypad"); +#endif + } else { + keypad->type = platform_get_device_id(pdev)->driver_data; + } + input_dev->name = pdev->name; input_dev->id.bustype = BUS_HOST; input_dev->dev.parent = &pdev->dev; @@ -363,6 +493,11 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev) if (error) goto err_free_irq; + if (pdev->dev.of_node) { + devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap); + devm_kfree(&pdev->dev, (void *)pdata->keymap_data); + devm_kfree(&pdev->dev, (void *)pdata); + } return 0; err_free_irq: @@ -372,6 +507,7 @@ err_free_irq: platform_set_drvdata(pdev, NULL); err_put_clk: clk_put(keypad->clk); + samsung_keypad_dt_gpio_free(keypad); err_unmap_base: iounmap(keypad->base); err_free_mem: @@ -398,6 +534,7 @@ static int __devexit samsung_keypad_remove(struct platform_device *pdev) free_irq(keypad->irq, keypad); clk_put(keypad->clk); + samsung_keypad_dt_gpio_free(keypad); iounmap(keypad->base); kfree(keypad); @@ -518,6 +655,17 @@ static const struct dev_pm_ops samsung_keypad_pm_ops = { samsung_keypad_runtime_resume, NULL) }; +#ifdef CONFIG_OF +static const struct of_device_id samsung_keypad_dt_match[] = { + { .compatible = "samsung,s3c6410-keypad" }, + { .compatible = "samsung,s5pv210-keypad" }, + {}, +}; +MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match); +#else +#define samsung_keypad_dt_match NULL +#endif + static struct platform_device_id samsung_keypad_driver_ids[] = { { .name = "samsung-keypad", @@ -536,6 +684,7 @@ static struct platform_driver samsung_keypad_driver = { .driver = { .name = "samsung-keypad", .owner = THIS_MODULE, + .of_match_table = samsung_keypad_dt_match, .pm = &samsung_keypad_pm_ops, }, .id_table = samsung_keypad_driver_ids, |
