drm: msm: dsi-staging: add support for DSI clock manager
Add support for DSI clock manager driver. This includes
refactor of the DSI power module, ULPS, PHY clamping,
DSI controller/PHY re-initialisation, and adds support
for enable/disable of DSI clocks during static screen.
The DSI clock manager maintains three state of the DSI
clocks namely ON/OFF/ECG.
CRs-Fixed: 2008002
Change-Id: I15bcf8531be6596c4a9dc52690c4971de46f387d
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>
diff --git a/drivers/gpu/drm/msm/dsi-staging/dsi_pwr.h b/drivers/gpu/drm/msm/dsi-staging/dsi_pwr.h
new file mode 100644
index 0000000..4d85244
--- /dev/null
+++ b/drivers/gpu/drm/msm/dsi-staging/dsi_pwr.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+#ifndef _DSI_PWR_H_
+#define _DSI_PWR_H_
+
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/regulator/consumer.h>
+
+/**
+ * struct dsi_vreg - regulator information for DSI regulators
+ * @vreg: Handle to the regulator.
+ * @vreg_name: Regulator name.
+ * @min_voltage: Minimum voltage in uV.
+ * @max_voltage: Maximum voltage in uV.
+ * @enable_load: Load, in uA, when enabled.
+ * @disable_load: Load, in uA, when disabled.
+ * @pre_on_sleep: Sleep, in ms, before enabling the regulator.
+ * @post_on_sleep: Sleep, in ms, after enabling the regulator.
+ * @pre_off_sleep: Sleep, in ms, before disabling the regulator.
+ * @post_off_sleep: Sleep, in ms, after disabling the regulator.
+ */
+struct dsi_vreg {
+ struct regulator *vreg;
+ char vreg_name[32];
+ u32 min_voltage;
+ u32 max_voltage;
+ u32 enable_load;
+ u32 disable_load;
+ u32 pre_on_sleep;
+ u32 post_on_sleep;
+ u32 pre_off_sleep;
+ u32 post_off_sleep;
+};
+
+/**
+ * struct dsi_regulator_info - set of vregs that are turned on/off together.
+ * @vregs: Array of dsi_vreg structures.
+ * @count: Number of vregs.
+ * @refcount: Reference counting for enabling.
+ */
+struct dsi_regulator_info {
+ struct dsi_vreg *vregs;
+ u32 count;
+ u32 refcount;
+};
+
+/**
+ * dsi_pwr_of_get_vreg_data - parse regulator supply information
+ * @of_node: Device of node to parse for supply information.
+ * @regs: Pointer where regulator information will be copied to.
+ * @supply_name: Name of the supply node.
+ *
+ * return: error code in case of failure or 0 for success.
+ */
+int dsi_pwr_of_get_vreg_data(struct device_node *of_node,
+ struct dsi_regulator_info *regs,
+ char *supply_name);
+
+/**
+ * dsi_pwr_get_dt_vreg_data - parse regulator supply information
+ * @dev: Device whose of_node needs to be parsed.
+ * @regs: Pointer where regulator information will be copied to.
+ * @supply_name: Name of the supply node.
+ *
+ * return: error code in case of failure or 0 for success.
+ */
+int dsi_pwr_get_dt_vreg_data(struct device *dev,
+ struct dsi_regulator_info *regs,
+ char *supply_name);
+
+/**
+ * dsi_pwr_enable_regulator() - enable a set of regulators
+ * @regs: Pointer to set of regulators to enable or disable.
+ * @enable: Enable/Disable regulators.
+ *
+ * return: error code in case of failure or 0 for success.
+ */
+int dsi_pwr_enable_regulator(struct dsi_regulator_info *regs, bool enable);
+#endif /* _DSI_PWR_H_ */