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 00000000000..786d685c09a
--- /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);
+}