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-rw-r--r--arch/arm/mach-omap2/sr_device.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c
new file mode 100644
index 000000000000..786d685c09a9
--- /dev/null
+++ b/arch/arm/mach-omap2/sr_device.c
@@ -0,0 +1,146 @@
+/*
+ * OMAP3/OMAP4 smartreflex device file
+ *
+ * Author: Thara Gopinath <thara@ti.com>
+ *
+ * Based originally on code from smartreflex.c
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Thara Gopinath <thara@ti.com>
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Kalle Jokiniemi
+ *
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ * Lesly A M <x0080970@ti.com>
+ *
+ * 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.
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+
+#include <plat/omap_device.h>
+#include <plat/smartreflex.h>
+#include <plat/voltage.h>
+
+#include "control.h"
+
+static bool sr_enable_on_init;
+
+static struct omap_device_pm_latency omap_sr_latency[] = {
+ {
+ .deactivate_func = omap_device_idle_hwmods,
+ .activate_func = omap_device_enable_hwmods,
+ .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST
+ },
+};
+
+/* Read EFUSE values from control registers for OMAP3430 */
+static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
+ struct omap_sr_data *sr_data)
+{
+ struct omap_sr_nvalue_table *nvalue_table;
+ int i, count = 0;
+
+ while (volt_data[count].volt_nominal)
+ count++;
+
+ nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count,
+ GFP_KERNEL);
+
+ for (i = 0; i < count; i++) {
+ u32 v;
+ /*
+ * In OMAP4 the efuse registers are 24 bit aligned.
+ * A __raw_readl will fail for non-32 bit aligned address
+ * and hence the 8-bit read and shift.
+ */
+ if (cpu_is_omap44xx()) {
+ u16 offset = volt_data[i].sr_efuse_offs;
+
+ v = omap_ctrl_readb(offset) |
+ omap_ctrl_readb(offset + 1) << 8 |
+ omap_ctrl_readb(offset + 2) << 16;
+ } else {
+ v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);
+ }
+
+ nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs;
+ nvalue_table[i].nvalue = v;
+ }
+
+ sr_data->nvalue_table = nvalue_table;
+ sr_data->nvalue_count = count;
+}
+
+static int sr_dev_init(struct omap_hwmod *oh, void *user)
+{
+ struct omap_sr_data *sr_data;
+ struct omap_device *od;
+ struct omap_volt_data *volt_data;
+ char *name = "smartreflex";
+ static int i;
+
+ sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL);
+ if (!sr_data) {
+ pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n",
+ __func__, oh->name);
+ return -ENOMEM;
+ }
+
+ if (!oh->vdd_name) {
+ pr_err("%s: No voltage domain specified for %s."
+ "Cannot initialize\n", __func__, oh->name);
+ goto exit;
+ }
+
+ sr_data->ip_type = oh->class->rev;
+ sr_data->senn_mod = 0x1;
+ sr_data->senp_mod = 0x1;
+
+ sr_data->voltdm = omap_voltage_domain_lookup(oh->vdd_name);
+ if (IS_ERR(sr_data->voltdm)) {
+ pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
+ __func__, oh->vdd_name);
+ goto exit;
+ }
+
+ omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
+ if (!volt_data) {
+ pr_warning("%s: No Voltage table registerd fo VDD%d."
+ "Something really wrong\n\n", __func__, i + 1);
+ goto exit;
+ }
+
+ sr_set_nvalues(volt_data, sr_data);
+
+ sr_data->enable_on_init = sr_enable_on_init;
+
+ od = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data),
+ omap_sr_latency,
+ ARRAY_SIZE(omap_sr_latency), 0);
+ if (IS_ERR(od))
+ pr_warning("%s: Could not build omap_device for %s: %s.\n\n",
+ __func__, name, oh->name);
+exit:
+ i++;
+ kfree(sr_data);
+ return 0;
+}
+
+/*
+ * API to be called from board files to enable smartreflex
+ * autocompensation at init.
+ */
+void __init omap_enable_smartreflex_on_init(void)
+{
+ sr_enable_on_init = true;
+}
+
+int __init omap_devinit_smartreflex(void)
+{
+ return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
+}