zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/opp.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/opp.c
new file mode 100644
index 0000000..d8f6dbf
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/opp.c
@@ -0,0 +1,92 @@
+/*
+ * OMAP SoC specific OPP wrapper function
+ *
+ * Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Nishanth Menon
+ * Kevin Hilman
+ * Copyright (C) 2010 Nokia Corporation.
+ * Eduardo Valentin
+ *
+ * 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 "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/module.h>
+#include <linux/opp.h>
+
+#include <plat/omap_device.h>
+
+#include "omap_opp_data.h"
+
+/* Temp variable to allow multiple calls */
+static u8 __initdata omap_table_init;
+
+/**
+ * omap_init_opp_table() - Initialize opp table as per the CPU type
+ * @opp_def: opp default list for this silicon
+ * @opp_def_size: number of opp entries for this silicon
+ *
+ * Register the initial OPP table with the OPP library based on the CPU
+ * type. This is meant to be used only by SoC specific registration.
+ */
+int __init omap_init_opp_table(struct omap_opp_def *opp_def,
+ u32 opp_def_size)
+{
+ int i, r;
+
+ if (!opp_def || !opp_def_size) {
+ pr_err("%s: invalid params!\n", __func__);
+ return -EINVAL;
+ }
+
+ /*
+ * Initialize only if not already initialized even if the previous
+ * call failed, because, no reason we'd succeed again.
+ */
+ if (omap_table_init)
+ return -EEXIST;
+ omap_table_init = 1;
+
+ /* Lets now register with OPP library */
+ for (i = 0; i < opp_def_size; i++, opp_def++) {
+ struct omap_hwmod *oh;
+ struct device *dev;
+
+ if (!opp_def->hwmod_name) {
+ pr_err("%s: NULL name of omap_hwmod, failing [%d].\n",
+ __func__, i);
+ return -EINVAL;
+ }
+ oh = omap_hwmod_lookup(opp_def->hwmod_name);
+ if (!oh || !oh->od) {
+ pr_debug("%s: no hwmod or odev for %s, [%d] "
+ "cannot add OPPs.\n", __func__,
+ opp_def->hwmod_name, i);
+ continue;
+ }
+ dev = &oh->od->pdev->dev;
+
+ r = opp_add(dev, opp_def->freq, opp_def->u_volt);
+ if (r) {
+ dev_err(dev, "%s: add OPP %ld failed for %s [%d] "
+ "result=%d\n",
+ __func__, opp_def->freq,
+ opp_def->hwmod_name, i, r);
+ } else {
+ if (!opp_def->default_available)
+ r = opp_disable(dev, opp_def->freq);
+ if (r)
+ dev_err(dev, "%s: disable %ld failed for %s "
+ "[%d] result=%d\n",
+ __func__, opp_def->freq,
+ opp_def->hwmod_name, i, r);
+ }
+ }
+
+ return 0;
+}