From 5ac4b013a31197b001d07590a79064747959bbd9 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Wed, 13 Jan 2016 11:44:57 +0100 Subject: input: Add device tree parsing support for matrix keymap Add support for parsing the "linux,keymap" property. Signed-off-by: Sascha Hauer --- drivers/input/imx_keypad.c | 4 +++- drivers/input/matrix-keymap.c | 49 ++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 51 insertions(+), 2 deletions(-) (limited to 'drivers/input') diff --git a/drivers/input/imx_keypad.c b/drivers/input/imx_keypad.c index bc74d7dee6..d3b5a8509e 100644 --- a/drivers/input/imx_keypad.c +++ b/drivers/input/imx_keypad.c @@ -396,8 +396,10 @@ static int __init imx_keypad_probe(struct device_d *dev) dev_dbg(dev, "enabled rows mask: %x\n", keypad->rows_en_mask); dev_dbg(dev, "enabled cols mask: %x\n", keypad->cols_en_mask); - matrix_keypad_build_keymap(keymap_data, MATRIX_ROW_SHIFT, + ret = matrix_keypad_build_keymap(dev, keymap_data, MATRIX_ROW_SHIFT, keypad->keycodes); + if (ret) + return ret; imx_keypad_config(keypad); diff --git a/drivers/input/matrix-keymap.c b/drivers/input/matrix-keymap.c index d56eccc29e..288b6a4b53 100644 --- a/drivers/input/matrix-keymap.c +++ b/drivers/input/matrix-keymap.c @@ -12,6 +12,47 @@ #include #include +static int matrix_keypad_parse_of_keymap(struct device_d *dev, + unsigned int row_shift, + unsigned short *keymap) +{ + unsigned int proplen, i, size; + const __be32 *prop; + struct device_node *np = dev->device_node; + const char *propname = "linux,keymap"; + + prop = of_get_property(np, propname, &proplen); + if (!prop) { + dev_err(dev, "OF: %s property not defined in %s\n", + propname, np->full_name); + return -ENOENT; + } + + if (proplen % sizeof(u32)) { + dev_err(dev, "OF: Malformed keycode property %s in %s\n", + propname, np->full_name); + return -EINVAL; + } + + size = proplen / sizeof(u32); + + for (i = 0; i < size; i++) { + unsigned int key = be32_to_cpup(prop + i); + + unsigned int row = KEY_ROW(key); + unsigned int col = KEY_COL(key); + unsigned short code = KEY_VAL(key); + + if (row >= MATRIX_MAX_ROWS || col >= MATRIX_MAX_COLS) { + dev_err(dev, "rows/cols out of range\n"); + continue; + } + + keymap[MATRIX_SCAN_CODE(row, col, row_shift)] = code; + } + + return 0; +} /** * matrix_keypad_build_keymap - convert platform keymap into matrix keymap * @keymap_data: keymap supplied by the platform code @@ -23,12 +64,18 @@ * an array of keycodes that is suitable for using in a standard matrix * keyboard driver that uses row and col as indices. */ -int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data, +int matrix_keypad_build_keymap(struct device_d *dev, const struct matrix_keymap_data *keymap_data, unsigned int row_shift, unsigned short *keymap) { int i; + if (IS_ENABLED(CONFIG_OFDEVICE) && dev->device_node) + return matrix_keypad_parse_of_keymap(dev, row_shift, keymap); + + if (!keymap_data) + return -EINVAL; + for (i = 0; i < keymap_data->keymap_size; i++) { unsigned int key = keymap_data->keymap[i]; unsigned int row = KEY_ROW(key); -- cgit v1.2.3