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authorMyungJoo Ham <myungjoo.ham@samsung.com>2010-08-20 14:43:56 +0900
committerLiam Girdwood <lrg@slimlogic.co.uk>2010-10-28 22:40:31 +0100
commit202f4f53e503ae09b431459131b5b3a99fa6d839 (patch)
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parent2d3b07c07b39c4b7d9b6641052a02d996cd5d87c (diff)
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MAX8952 PMIC Driver Initial Release
MAX8952 PMIC is used to provide voltage output between 770mV - 1400mV with DVS support. In this initial release, users can set voltages for four DVS modes, RAMP delay values, and SYNC frequency. Controlling FPWM/SYNC_MODE/Pull-Down/Ramp Modes and reading CHIP_ID is not supported in this release. If GPIO of EN is not valid in platform data, the driver assumes that it is always-on. If GPIO of VID0 or VID1 is invalid, the driver pulls down VID0 and VID1 to fix DVS mode as 0 and disables DVS support. We assume that V_OUT is capable to provide every voltage from 770mV to 1.40V in 10mV steps although the data sheet has some ambiguity on it. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> -- v2: - Style correction - Can accept platform_data with invalid GPIOs - Removed unnecessary features - Improved error handling Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'include/linux/regulator')
-rw-r--r--include/linux/regulator/max8952.h135
1 files changed, 135 insertions, 0 deletions
diff --git a/include/linux/regulator/max8952.h b/include/linux/regulator/max8952.h
new file mode 100644
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+++ b/include/linux/regulator/max8952.h
@@ -0,0 +1,135 @@
+/*
+ * max8952.h - Voltage regulation for the Maxim 8952
+ *
+ * Copyright (C) 2010 Samsung Electrnoics
+ * MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef REGULATOR_MAX8952
+#define REGULATOR_MAX8952
+
+#include <linux/regulator/machine.h>
+
+enum {
+ MAX8952_DVS_MODE0,
+ MAX8952_DVS_MODE1,
+ MAX8952_DVS_MODE2,
+ MAX8952_DVS_MODE3,
+};
+
+enum {
+ MAX8952_DVS_770mV = 0,
+ MAX8952_DVS_780mV,
+ MAX8952_DVS_790mV,
+ MAX8952_DVS_800mV,
+ MAX8952_DVS_810mV,
+ MAX8952_DVS_820mV,
+ MAX8952_DVS_830mV,
+ MAX8952_DVS_840mV,
+ MAX8952_DVS_850mV,
+ MAX8952_DVS_860mV,
+ MAX8952_DVS_870mV,
+ MAX8952_DVS_880mV,
+ MAX8952_DVS_890mV,
+ MAX8952_DVS_900mV,
+ MAX8952_DVS_910mV,
+ MAX8952_DVS_920mV,
+ MAX8952_DVS_930mV,
+ MAX8952_DVS_940mV,
+ MAX8952_DVS_950mV,
+ MAX8952_DVS_960mV,
+ MAX8952_DVS_970mV,
+ MAX8952_DVS_980mV,
+ MAX8952_DVS_990mV,
+ MAX8952_DVS_1000mV,
+ MAX8952_DVS_1010mV,
+ MAX8952_DVS_1020mV,
+ MAX8952_DVS_1030mV,
+ MAX8952_DVS_1040mV,
+ MAX8952_DVS_1050mV,
+ MAX8952_DVS_1060mV,
+ MAX8952_DVS_1070mV,
+ MAX8952_DVS_1080mV,
+ MAX8952_DVS_1090mV,
+ MAX8952_DVS_1100mV,
+ MAX8952_DVS_1110mV,
+ MAX8952_DVS_1120mV,
+ MAX8952_DVS_1130mV,
+ MAX8952_DVS_1140mV,
+ MAX8952_DVS_1150mV,
+ MAX8952_DVS_1160mV,
+ MAX8952_DVS_1170mV,
+ MAX8952_DVS_1180mV,
+ MAX8952_DVS_1190mV,
+ MAX8952_DVS_1200mV,
+ MAX8952_DVS_1210mV,
+ MAX8952_DVS_1220mV,
+ MAX8952_DVS_1230mV,
+ MAX8952_DVS_1240mV,
+ MAX8952_DVS_1250mV,
+ MAX8952_DVS_1260mV,
+ MAX8952_DVS_1270mV,
+ MAX8952_DVS_1280mV,
+ MAX8952_DVS_1290mV,
+ MAX8952_DVS_1300mV,
+ MAX8952_DVS_1310mV,
+ MAX8952_DVS_1320mV,
+ MAX8952_DVS_1330mV,
+ MAX8952_DVS_1340mV,
+ MAX8952_DVS_1350mV,
+ MAX8952_DVS_1360mV,
+ MAX8952_DVS_1370mV,
+ MAX8952_DVS_1380mV,
+ MAX8952_DVS_1390mV,
+ MAX8952_DVS_1400mV,
+};
+
+enum {
+ MAX8952_SYNC_FREQ_26MHZ, /* Default */
+ MAX8952_SYNC_FREQ_13MHZ,
+ MAX8952_SYNC_FREQ_19_2MHZ,
+};
+
+enum {
+ MAX8952_RAMP_32mV_us = 0, /* Default */
+ MAX8952_RAMP_16mV_us,
+ MAX8952_RAMP_8mV_us,
+ MAX8952_RAMP_4mV_us,
+ MAX8952_RAMP_2mV_us,
+ MAX8952_RAMP_1mV_us,
+ MAX8952_RAMP_0_5mV_us,
+ MAX8952_RAMP_0_25mV_us,
+};
+
+#define MAX8952_NUM_DVS_MODE 4
+
+struct max8952_platform_data {
+ int gpio_vid0;
+ int gpio_vid1;
+ int gpio_en;
+
+ u8 default_mode;
+ u8 dvs_mode[MAX8952_NUM_DVS_MODE]; /* MAX8952_DVS_MODEx_XXXXmV */
+
+ u8 sync_freq;
+ u8 ramp_speed;
+
+ struct regulator_init_data reg_data;
+};
+
+
+#endif /* REGULATOR_MAX8952 */