v4.19.13 snapshot.
diff --git a/arch/arm/mach-omap2/sr_device.c b/arch/arm/mach-omap2/sr_device.c
new file mode 100644
index 0000000..0854ed9
--- /dev/null
+++ b/arch/arm/mach-omap2/sr_device.c
@@ -0,0 +1,175 @@
+/*
+ * 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/power/smartreflex.h>
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+
+#include "soc.h"
+#include "omap_device.h"
+#include "voltage.h"
+#include "control.h"
+#include "pm.h"
+
+static bool sr_enable_on_init;
+
+/* 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, j, count = 0;
+
+ sr_data->nvalue_count = 0;
+ sr_data->nvalue_table = NULL;
+
+ while (volt_data[count].volt_nominal)
+ count++;
+
+ nvalue_table = kcalloc(count, sizeof(*nvalue_table), GFP_KERNEL);
+ if (!nvalue_table)
+ return;
+
+ for (i = 0, j = 0; i < count; i++) {
+ u32 v;
+
+ /*
+ * In OMAP4 the efuse registers are 24 bit aligned.
+ * A readl_relaxed 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);
+ }
+
+ /*
+ * Many OMAP SoCs don't have the eFuse values set.
+ * For example, pretty much all OMAP3xxx before
+ * ES3.something.
+ *
+ * XXX There needs to be some way for board files or
+ * userspace to add these in.
+ */
+ if (v == 0)
+ continue;
+
+ nvalue_table[j].nvalue = v;
+ nvalue_table[j].efuse_offs = volt_data[i].sr_efuse_offs;
+ nvalue_table[j].errminlimit = volt_data[i].sr_errminlimit;
+ nvalue_table[j].volt_nominal = volt_data[i].volt_nominal;
+
+ j++;
+ }
+
+ sr_data->nvalue_table = nvalue_table;
+ sr_data->nvalue_count = j;
+}
+
+extern struct omap_sr_data omap_sr_pdata[];
+
+static int __init sr_dev_init(struct omap_hwmod *oh, void *user)
+{
+ struct omap_sr_data *sr_data = NULL;
+ struct omap_volt_data *volt_data;
+ struct omap_smartreflex_dev_attr *sr_dev_attr;
+ static int i;
+
+ if (!strncmp(oh->name, "smartreflex_mpu_iva", 20) ||
+ !strncmp(oh->name, "smartreflex_mpu", 16))
+ sr_data = &omap_sr_pdata[OMAP_SR_MPU];
+ else if (!strncmp(oh->name, "smartreflex_core", 17))
+ sr_data = &omap_sr_pdata[OMAP_SR_CORE];
+ else if (!strncmp(oh->name, "smartreflex_iva", 16))
+ sr_data = &omap_sr_pdata[OMAP_SR_IVA];
+
+ if (!sr_data) {
+ pr_err("%s: Unknown instance %s\n", __func__, oh->name);
+ return -EINVAL;
+ }
+
+ sr_dev_attr = (struct omap_smartreflex_dev_attr *)oh->dev_attr;
+ if (!sr_dev_attr || !sr_dev_attr->sensor_voltdm_name) {
+ pr_err("%s: No voltage domain specified for %s. Cannot initialize\n",
+ __func__, oh->name);
+ goto exit;
+ }
+
+ sr_data->name = oh->name;
+ sr_data->ip_type = oh->class->rev;
+ sr_data->senn_mod = 0x1;
+ sr_data->senp_mod = 0x1;
+
+ if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
+ sr_data->err_weight = OMAP3430_SR_ERRWEIGHT;
+ sr_data->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
+ sr_data->accum_data = OMAP3430_SR_ACCUMDATA;
+ if (!(strcmp(sr_data->name, "smartreflex_mpu"))) {
+ sr_data->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT;
+ sr_data->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT;
+ } else {
+ sr_data->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT;
+ sr_data->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT;
+ }
+ }
+
+ sr_data->voltdm = voltdm_lookup(sr_dev_attr->sensor_voltdm_name);
+ if (!sr_data->voltdm) {
+ pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
+ __func__, sr_dev_attr->sensor_voltdm_name);
+ goto exit;
+ }
+
+ omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
+ if (!volt_data) {
+ pr_err("%s: No Voltage table registered for VDD%d\n",
+ __func__, i + 1);
+ goto exit;
+ }
+
+ sr_set_nvalues(volt_data, sr_data);
+
+ sr_data->enable_on_init = sr_enable_on_init;
+
+exit:
+ i++;
+
+ 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);
+}