diff options
Diffstat (limited to 'drivers/input/keyboard/tegra-kbc.c')
| -rw-r--r-- | drivers/input/keyboard/tegra-kbc.c | 80 |
1 files changed, 62 insertions, 18 deletions
diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c index 68b2b65024d6..b46142f78ef2 100644 --- a/drivers/input/keyboard/tegra-kbc.c +++ b/drivers/input/keyboard/tegra-kbc.c @@ -27,18 +27,19 @@ #include <linux/io.h> #include <linux/interrupt.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/clk.h> #include <linux/slab.h> #include <linux/input/matrix_keypad.h> #include <linux/clk/tegra.h> #include <linux/err.h> -#define KBC_MAX_GPIO 24 #define KBC_MAX_KPENT 8 -#define KBC_MAX_ROW 16 -#define KBC_MAX_COL 8 -#define KBC_MAX_KEY (KBC_MAX_ROW * KBC_MAX_COL) +/* Maximum row/column supported by Tegra KBC yet is 16x8 */ +#define KBC_MAX_GPIO 24 +/* Maximum keys supported by Tegra KBC yet is 16 x 8*/ +#define KBC_MAX_KEY (16 * 8) #define KBC_MAX_DEBOUNCE_CNT 0x3ffu @@ -81,6 +82,12 @@ enum tegra_pin_type { PIN_CFG_ROW, }; +/* Tegra KBC hw support */ +struct tegra_kbc_hw_support { + int max_rows; + int max_columns; +}; + struct tegra_kbc_pin_cfg { enum tegra_pin_type type; unsigned char num; @@ -109,6 +116,9 @@ struct tegra_kbc { u32 wakeup_key; struct timer_list timer; struct clk *clk; + const struct tegra_kbc_hw_support *hw_support; + int max_keys; + int num_rows_and_columns; }; static void tegra_kbc_report_released_keys(struct input_dev *input, @@ -205,11 +215,11 @@ static void tegra_kbc_report_keys(struct tegra_kbc *kbc) /* * If the platform uses Fn keymaps, translate keys on a Fn keypress. - * Function keycodes are KBC_MAX_KEY apart from the plain keycodes. + * Function keycodes are max_keys apart from the plain keycodes. */ if (fn_keypress) { for (i = 0; i < num_down; i++) { - scancodes[i] += KBC_MAX_KEY; + scancodes[i] += kbc->max_keys; keycodes[i] = kbc->keycode[scancodes[i]]; } } @@ -316,7 +326,7 @@ static void tegra_kbc_setup_wakekeys(struct tegra_kbc *kbc, bool filter) /* Either mask all keys or none. */ rst_val = (filter && !kbc->wakeup) ? ~0 : 0; - for (i = 0; i < KBC_MAX_ROW; i++) + for (i = 0; i < kbc->hw_support->max_rows; i++) writel(rst_val, kbc->mmio + KBC_ROW0_MASK_0 + i * 4); } @@ -453,7 +463,7 @@ static bool tegra_kbc_check_pin_cfg(const struct tegra_kbc *kbc, switch (pin_cfg->type) { case PIN_CFG_ROW: - if (pin_cfg->num >= KBC_MAX_ROW) { + if (pin_cfg->num >= kbc->hw_support->max_rows) { dev_err(kbc->dev, "pin_cfg[%d]: invalid row number %d\n", i, pin_cfg->num); @@ -463,7 +473,7 @@ static bool tegra_kbc_check_pin_cfg(const struct tegra_kbc *kbc, break; case PIN_CFG_COL: - if (pin_cfg->num >= KBC_MAX_COL) { + if (pin_cfg->num >= kbc->hw_support->max_columns) { dev_err(kbc->dev, "pin_cfg[%d]: invalid column number %d\n", i, pin_cfg->num); @@ -521,6 +531,18 @@ static int tegra_kbc_parse_dt(struct tegra_kbc *kbc) } num_cols = proplen / sizeof(u32); + if (num_rows > kbc->hw_support->max_rows) { + dev_err(kbc->dev, + "Number of rows is more than supported by hardware\n"); + return -EINVAL; + } + + if (num_cols > kbc->hw_support->max_columns) { + dev_err(kbc->dev, + "Number of cols is more than supported by hardware\n"); + return -EINVAL; + } + if (!of_get_property(np, "linux,keymap", &proplen)) { dev_err(kbc->dev, "property linux,keymap not found\n"); return -ENOENT; @@ -533,7 +555,7 @@ static int tegra_kbc_parse_dt(struct tegra_kbc *kbc) } /* Set all pins as non-configured */ - for (i = 0; i < KBC_MAX_GPIO; i++) + for (i = 0; i < kbc->num_rows_and_columns; i++) kbc->pin_cfg[i].type = PIN_CFG_IGNORE; ret = of_property_read_u32_array(np, "nvidia,kbc-row-pins", @@ -563,6 +585,24 @@ static int tegra_kbc_parse_dt(struct tegra_kbc *kbc) return 0; } +static const struct tegra_kbc_hw_support tegra20_kbc_hw_support = { + .max_rows = 16, + .max_columns = 8, +}; + +static const struct tegra_kbc_hw_support tegra11_kbc_hw_support = { + .max_rows = 11, + .max_columns = 8, +}; + +static const struct of_device_id tegra_kbc_of_match[] = { + { .compatible = "nvidia,tegra114-kbc", .data = &tegra11_kbc_hw_support}, + { .compatible = "nvidia,tegra30-kbc", .data = &tegra20_kbc_hw_support}, + { .compatible = "nvidia,tegra20-kbc", .data = &tegra20_kbc_hw_support}, + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_kbc_of_match); + static int tegra_kbc_probe(struct platform_device *pdev) { struct tegra_kbc *kbc; @@ -571,7 +611,10 @@ static int tegra_kbc_probe(struct platform_device *pdev) int num_rows = 0; unsigned int debounce_cnt; unsigned int scan_time_rows; - unsigned int keymap_rows = KBC_MAX_KEY; + unsigned int keymap_rows; + const struct of_device_id *match; + + match = of_match_device(of_match_ptr(tegra_kbc_of_match), &pdev->dev); kbc = devm_kzalloc(&pdev->dev, sizeof(*kbc), GFP_KERNEL); if (!kbc) { @@ -580,6 +623,12 @@ static int tegra_kbc_probe(struct platform_device *pdev) } kbc->dev = &pdev->dev; + kbc->hw_support = match->data; + kbc->max_keys = kbc->hw_support->max_rows * + kbc->hw_support->max_columns; + kbc->num_rows_and_columns = kbc->hw_support->max_rows + + kbc->hw_support->max_columns; + keymap_rows = kbc->max_keys; spin_lock_init(&kbc->lock); err = tegra_kbc_parse_dt(kbc); @@ -640,7 +689,8 @@ static int tegra_kbc_probe(struct platform_device *pdev) keymap_rows *= 2; err = matrix_keypad_build_keymap(kbc->keymap_data, NULL, - keymap_rows, KBC_MAX_COL, + keymap_rows, + kbc->hw_support->max_columns, kbc->keycode, kbc->idev); if (err) { dev_err(&pdev->dev, "failed to setup keymap\n"); @@ -766,12 +816,6 @@ static int tegra_kbc_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(tegra_kbc_pm_ops, tegra_kbc_suspend, tegra_kbc_resume); -static const struct of_device_id tegra_kbc_of_match[] = { - { .compatible = "nvidia,tegra20-kbc", }, - { }, -}; -MODULE_DEVICE_TABLE(of, tegra_kbc_of_match); - static struct platform_driver tegra_kbc_driver = { .probe = tegra_kbc_probe, .driver = { |