diff options
author | Micky Ching <micky_ching@realsil.com.cn> | 2013-11-12 09:16:08 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-25 20:44:37 (GMT) |
commit | fa590c222fbaa428edb2ce2194638906cea1400a (patch) | |
tree | 885a784831cc44c798a5150ea00b4d9218e5dff4 /drivers/staging/rts5208/general.c | |
parent | 8a76714dd3755536a28f0d0b9c5fc378c492da40 (diff) | |
download | linux-fa590c222fbaa428edb2ce2194638906cea1400a.tar.xz |
staging: rts5208: add support for rts5208 and rts5288
There are still many rts5208/5288 card readers being used, but no
drivers are supported them in kernel now. This driver can make a
great convenience for people who use them.
Many other rts-series card reader are supported by mfd driver, but due
to much difference with others, rts5208/5288 can not add into mfd driver
pretty now, so we provide a separated driver here to support the device.
Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/rts5208/general.c')
-rw-r--r-- | drivers/staging/rts5208/general.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/staging/rts5208/general.c b/drivers/staging/rts5208/general.c new file mode 100644 index 0000000..eada934 --- /dev/null +++ b/drivers/staging/rts5208/general.c @@ -0,0 +1,35 @@ +/* Driver for Realtek PCI-Express card reader + * + * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + * + * Author: + * Wei WANG (wei_wang@realsil.com.cn) + * Micky Ching (micky_ching@realsil.com.cn) + */ + +#include "general.h" + +int bit1cnt_long(u32 data) +{ + int i, cnt = 0; + for (i = 0; i < 32; i++) { + if (data & 0x01) + cnt++; + data >>= 1; + } + return cnt; +} + |