linux/drivers/mfd/rtsx_gops.c
Micky Ching 5cb5d9616a mfd: rtsx: Fix PM suspend for 5227 & 5249
Fix rts5227&5249 failed send buffer cmd after suspend,
PM_CTRL3 should reset before send any buffer cmd after suspend.
Otherwise, buffer cmd will failed, this will lead resume fail.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-11-25 16:18:48 +00:00

38 lines
1.2 KiB
C

/* 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:
* Micky Ching <micky_ching@realsil.com.cn>
*/
#include <linux/mfd/rtsx_pci.h>
#include "rtsx_pcr.h"
int rtsx_gops_pm_reset(struct rtsx_pcr *pcr)
{
int err;
/* init aspm */
rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, 0xFF, 0x00);
err = rtsx_pci_update_cfg_byte(pcr, LCTLR, ~LCTLR_ASPM_CTL_MASK, 0x00);
if (err < 0)
return err;
/* reset PM_CTRL3 before send buffer cmd */
return rtsx_pci_write_register(pcr, PM_CTRL3, D3_DELINK_MODE_EN, 0x00);
}