ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/arm/mach-omap2/hdq1w.c b/marvell/linux/arch/arm/mach-omap2/hdq1w.c
new file mode 100644
index 0000000..c0127f2
--- /dev/null
+++ b/marvell/linux/arch/arm/mach-omap2/hdq1w.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IP block integration code for the HDQ1W/1-wire IP block
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ * Paul Walmsley
+ *
+ * Based on the I2C reset code in arch/arm/mach-omap2/i2c.c by
+ * Avinash.H.M <avinashhm@ti.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+
+#include "soc.h"
+#include "omap_hwmod.h"
+#include "omap_device.h"
+#include "hdq1w.h"
+
+#include "prm.h"
+#include "common.h"
+
+/**
+ * omap_hdq1w_reset - reset the OMAP HDQ1W module
+ * @oh: struct omap_hwmod *
+ *
+ * OCP soft reset the HDQ1W IP block. Section 20.6.1.4 "HDQ1W/1-Wire
+ * Software Reset" of the OMAP34xx Technical Reference Manual Revision
+ * ZR (SWPU223R) does not include the rather important fact that, for
+ * the reset to succeed, the HDQ1W module's internal clock gate must be
+ * programmed to allow the clock to propagate to the rest of the
+ * module. In this sense, it's rather similar to the I2C custom reset
+ * function. Returns 0.
+ */
+int omap_hdq1w_reset(struct omap_hwmod *oh)
+{
+ u32 v;
+ int c = 0;
+
+ /* Write to the SOFTRESET bit */
+ omap_hwmod_softreset(oh);
+
+ /* Enable the module's internal clocks */
+ v = omap_hwmod_read(oh, HDQ_CTRL_STATUS_OFFSET);
+ v |= 1 << HDQ_CTRL_STATUS_CLOCKENABLE_SHIFT;
+ omap_hwmod_write(v, oh, HDQ_CTRL_STATUS_OFFSET);
+
+ /* Poll on RESETDONE bit */
+ omap_test_timeout((omap_hwmod_read(oh,
+ oh->class->sysc->syss_offs)
+ & SYSS_RESETDONE_MASK),
+ MAX_MODULE_SOFTRESET_WAIT, c);
+
+ if (c == MAX_MODULE_SOFTRESET_WAIT)
+ pr_warn("%s: %s: softreset failed (waited %d usec)\n",
+ __func__, oh->name, MAX_MODULE_SOFTRESET_WAIT);
+ else
+ pr_debug("%s: %s: softreset in %d usec\n", __func__,
+ oh->name, c);
+
+ return 0;
+}