[ARM] msm: vreg interface to msm7k pmic
The baseband cpu owns the pmic, so voltage regulator control is only
available via a relatively limited interface through the proc_comm
transport.
Signed-off-by: Brian Swetland <swetland@google.com>
diff --git a/arch/arm/mach-msm/vreg.c b/arch/arm/mach-msm/vreg.c
new file mode 100644
index 0000000..fcb0b9f
--- /dev/null
+++ b/arch/arm/mach-msm/vreg.c
@@ -0,0 +1,143 @@
+/* arch/arm/mach-msm/vreg.c
+ *
+ * Copyright (C) 2008 Google, Inc.
+ * Author: Brian Swetland <swetland@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/debugfs.h>
+#include <mach/vreg.h>
+
+#include "proc_comm.h"
+
+struct vreg {
+ const char *name;
+ unsigned id;
+};
+
+#define VREG(_name, _id) { .name = _name, .id = _id, }
+
+static struct vreg vregs[] = {
+ VREG("msma", 0),
+ VREG("msmp", 1),
+ VREG("msme1", 2),
+ VREG("msmc1", 3),
+ VREG("msmc2", 4),
+ VREG("gp3", 5),
+ VREG("msme2", 6),
+ VREG("gp4", 7),
+ VREG("gp1", 8),
+ VREG("tcxo", 9),
+ VREG("pa", 10),
+ VREG("rftx", 11),
+ VREG("rfrx1", 12),
+ VREG("rfrx2", 13),
+ VREG("synt", 14),
+ VREG("wlan", 15),
+ VREG("usb", 16),
+ VREG("boost", 17),
+ VREG("mmc", 18),
+ VREG("ruim", 19),
+ VREG("msmc0", 20),
+ VREG("gp2", 21),
+ VREG("gp5", 22),
+ VREG("gp6", 23),
+ VREG("rf", 24),
+ VREG("rf_vco", 26),
+ VREG("mpll", 27),
+ VREG("s2", 28),
+ VREG("s3", 29),
+ VREG("rfubm", 30),
+ VREG("ncp", 31),
+};
+
+struct vreg *vreg_get(struct device *dev, const char *id)
+{
+ int n;
+ for (n = 0; n < ARRAY_SIZE(vregs); n++) {
+ if (!strcmp(vregs[n].name, id))
+ return vregs + n;
+ }
+ return 0;
+}
+
+void vreg_put(struct vreg *vreg)
+{
+}
+
+int vreg_enable(struct vreg *vreg)
+{
+ unsigned id = vreg->id;
+ unsigned enable = 1;
+ return msm_proc_comm(PCOM_VREG_SWITCH, &id, &enable);
+}
+
+void vreg_disable(struct vreg *vreg)
+{
+ unsigned id = vreg->id;
+ unsigned enable = 0;
+ msm_proc_comm(PCOM_VREG_SWITCH, &id, &enable);
+}
+
+int vreg_set_level(struct vreg *vreg, unsigned mv)
+{
+ unsigned id = vreg->id;
+ return msm_proc_comm(PCOM_VREG_SET_LEVEL, &id, &mv);
+}
+
+#if defined(CONFIG_DEBUG_FS)
+
+static int vreg_debug_set(void *data, u64 val)
+{
+ struct vreg *vreg = data;
+ switch (val) {
+ case 0:
+ vreg_disable(vreg);
+ break;
+ case 1:
+ vreg_enable(vreg);
+ break;
+ default:
+ vreg_set_level(vreg, val);
+ break;
+ }
+ return 0;
+}
+
+static int vreg_debug_get(void *data, u64 *val)
+{
+ return -ENOSYS;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(vreg_fops, vreg_debug_get, vreg_debug_set, "%llu\n");
+
+static int __init vreg_debug_init(void)
+{
+ struct dentry *dent;
+ int n;
+
+ dent = debugfs_create_dir("vreg", 0);
+ if (IS_ERR(dent))
+ return 0;
+
+ for (n = 0; n < ARRAY_SIZE(vregs); n++)
+ (void) debugfs_create_file(vregs[n].name, 0644,
+ dent, vregs + n, &vreg_fops);
+
+ return 0;
+}
+
+device_initcall(vreg_debug_init);
+#endif