From 9e1b7498d79ab9076791807172d4603c7be63c1b Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Tue, 8 May 2012 11:34:27 -0600 Subject: ARM: OMAP2+: HDQ1W: add custom reset function Implement a custom reset function for the HDQ1W IP block. This is because the HDQ1W IP block, like I2C, has an internal clock gating bit that needs to be toggled after setting the SOFTRESET bit to allow the reset to propagate. Signed-off-by: Paul Walmsley Cc: NeilBrown Cc: Avinash.H.M Tested-by: NeilBrown --- arch/arm/plat-omap/include/plat/hdq1w.h | 36 +++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 arch/arm/plat-omap/include/plat/hdq1w.h (limited to 'arch/arm/plat-omap/include/plat/hdq1w.h') diff --git a/arch/arm/plat-omap/include/plat/hdq1w.h b/arch/arm/plat-omap/include/plat/hdq1w.h new file mode 100644 index 000000000000..0c1efc846d8d --- /dev/null +++ b/arch/arm/plat-omap/include/plat/hdq1w.h @@ -0,0 +1,36 @@ +/* + * Shared macros and function prototypes for the HDQ1W/1-wire IP block + * + * Copyright (C) 2012 Texas Instruments, Inc. + * Paul Walmsley + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ +#ifndef ARCH_ARM_MACH_OMAP2_HDQ1W_H +#define ARCH_ARM_MACH_OMAP2_HDQ1W_H + +#include + +/* + * XXX A future cleanup patch should modify + * drivers/w1/masters/omap_hdq.c to use these macros + */ +#define HDQ_CTRL_STATUS_OFFSET 0x0c +#define HDQ_CTRL_STATUS_CLOCKENABLE_SHIFT 5 + + +extern int omap_hdq1w_reset(struct omap_hwmod *oh); + +#endif -- cgit v1.2.1