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@ -46,6 +46,9 @@ static int has_ghosting(struct key_matrix *config, struct key_matrix_key *keys, |
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int key_in_same_col = 0, key_in_same_row = 0; |
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int i, j; |
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if (!config->ghost_filter || valid < 3) |
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return 0; |
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for (i = 0; i < valid; i++) { |
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/*
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* Find 2 keys such that one key is in the same row |
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@ -92,7 +95,7 @@ int key_matrix_decode(struct key_matrix *config, struct key_matrix_key keys[], |
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} |
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/* For a ghost key config, ignore the keypresses for this iteration. */ |
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if (valid >= 3 && has_ghosting(config, keys, valid)) { |
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if (has_ghosting(config, keys, valid)) { |
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valid = 0; |
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debug(" ghosting detected!\n"); |
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} |
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@ -200,12 +203,14 @@ int key_matrix_decode_fdt(struct key_matrix *config, const void *blob, |
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return 0; |
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} |
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int key_matrix_init(struct key_matrix *config, int rows, int cols) |
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int key_matrix_init(struct key_matrix *config, int rows, int cols, |
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int ghost_filter) |
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{ |
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memset(config, '\0', sizeof(*config)); |
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config->num_rows = rows; |
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config->num_cols = cols; |
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config->key_count = rows * cols; |
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config->ghost_filter = ghost_filter; |
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assert(config->key_count > 0); |
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return 0; |
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