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path: root/include/drm

Age	Commit message (Expand)	Author
2020-01-27	drm/amdgpu: fix doc by clarifying sched_list definition	Nirmoy Das
2020-01-20	Backmerge v5.5-rc7 into drm-next	Dave Airlie
2020-01-18	Merge tag 'amd-drm-next-5.6-2020-01-17' of git://people.freedesktop.org/~agd5...	Dave Airlie
2020-01-16	drm/scheduler: fix documentation by replacing rq_list with sched_list	Nirmoy Das
2020-01-16	drm/scheduler: improve job distribution with multiple queues	Nirmoy Das
2020-01-15	drm/dp_mst: Have DP_Tx send one msg at a time	Wayne Lin
2020-01-15	Merge tag 'drm-intel-next-2020-01-14' of git://anongit.freedesktop.org/drm/dr...	Dave Airlie
2020-01-13	Merge tag 'amd-drm-next-5.6-2020-01-10-dp-mst-dsc' of git://people.freedeskto...	Dave Airlie
2020-01-13	Merge tag 'amd-drm-next-5.6-2020-01-09' of git://people.freedesktop.org/~agd5...	Dave Airlie
2020-01-13	Merge tag 'drm-misc-next-2020-01-10' of git://anongit.freedesktop.org/drm/drm...	Dave Airlie
2020-01-09	drm: add dp helper to initialize remote aux channel.	David (Dingchen) Zhang
2020-01-09	drm/dp_mst: Add helper to trigger modeset on affected DSC MST CRTCs	Mikita Lipski
2020-01-09	drm/dp_mst: Add branch bandwidth validation to MST atomic check	Mikita Lipski
2020-01-09	drm/dp_mst: Add DSC enablement helpers to DRM	Mikita Lipski
2020-01-09	drm/dp_mst: Manually overwrite PBN divider for calculating timeslots	Mikita Lipski
2020-01-09	drm/dp_mst: Add new quirk for Synaptics MST hubs	Mikita Lipski
2020-01-09	drm/dp_mst: Add helpers for MST DSC and virtual DPCD aux	David Francis
2020-01-09	drm/dp_mst: Parse FEC capability on MST ports	David Francis
2020-01-09	drm/dp_mst: Add PBN calculation for DSC modes	David Francis
2020-01-09	drm/fb-cma-helpers: Fix include issue	Benjamin Gaignard
2020-01-09	Merge drm/drm-next into drm-intel-next-queued	Jani Nikula
2020-01-09	Merge tag 'drm-misc-next-2020-01-07' of git://anongit.freedesktop.org/drm/drm...	Dave Airlie
2020-01-09	drm: of: Fix linking when CONFIG_OF is not set	Laurent Pinchart
2020-01-08	Revert "drm/bridge: Add a drm_bridge_state object"	Boris Brezillon
2020-01-08	Revert "drm/bridge: Patch atomic hooks to take a drm_bridge_state"	Boris Brezillon
2020-01-08	Revert "drm/bridge: Add an ->atomic_check() hook"	Boris Brezillon
2020-01-08	Revert "drm/bridge: Add the necessary bits to support bus format negotiation"	Boris Brezillon
2020-01-07	drm/fb: Extend format_info member arrays to handle four planes	Dhinakaran Pandiyan
2020-01-07	drm/vram-helper: Remove BO device from public interface	Thomas Zimmermann
2020-01-07	drm/vram-helper: Remove interruptible flag from public interface	Thomas Zimmermann
2020-01-07	drm/bridge: Add the necessary bits to support bus format negotiation	Boris Brezillon
2020-01-07	drm/bridge: Add an ->atomic_check() hook	Boris Brezillon
2020-01-07	drm/bridge: Patch atomic hooks to take a drm_bridge_state	Boris Brezillon
2020-01-07	drm/bridge: Add a drm_bridge_state object	Boris Brezillon
2020-01-06	drm/vram: Support scanline alignment for dumb buffers	Thomas Zimmermann
2020-01-03	Merge tag 'drm-misc-next-2020-01-02' of git://anongit.freedesktop.org/drm/drm...	Dave Airlie
2019-12-27	Merge tag 'drm-intel-next-2019-12-23' of git://anongit.freedesktop.org/drm/dr...	Dave Airlie
2019-12-22	drm/atomic: Spell CRTC consistently	Thierry Reding
2019-12-22	drm: Fix a couple of typos, punctation and whitespace issues	Thierry Reding
2019-12-18	drm: Add Reusable task barrier.	Andrey Grodzovsky
2019-12-18	drm/scheduler: rework entity creation	Nirmoy Das
2019-12-18	Merge tag 'du-next-20191218' of git://linuxtv.org/pinchartl/media into drm-next	Daniel Vetter
2019-12-18	drm: Add __drm_atomic_helper_crtc_state_reset() & co.	Ville Syrjälä
2019-12-18	drm: of: Add drm_of_lvds_get_dual_link_pixel_order	Fabrizio Castro
2019-12-17	drm/drm_panel: Fix EXPORT of drm_panel_of_backlight() one more time	Andy Shevchenko
2019-12-17	drm/print: introduce new struct drm_device based logging macros	Jani Nikula
2019-12-17	Merge tag 'drm-misc-next-2019-12-16' of git://anongit.freedesktop.org/drm/drm...	Daniel Vetter
2019-12-16	drm/modes: parse_cmdline: Add support for specifying panel_orientation (v2)	Hans de Goede
2019-12-16	drm/bridge/synopsys: dsi: driver-specific configuration of phy timings	Heiko Stuebner
2019-12-12	drm/i915/cml: Separate U series pci id from origianl list.	Lee Shawn C

• [next]

generated by cgit v1.2.3 (git 2.25.1) at 2024-08-26 02:53:20 +0000

/*
 * max8973-regulator.c -- Maxim max8973
 *
 * Regulator driver for MAXIM 8973 DC-DC step-down switching regulator.
 *
 * Copyright (c) 2012, NVIDIA Corporation.
 *
 * Author: Laxman Dewangan <ldewangan@nvidia.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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
 * whether express or implied; 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
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/max8973-regulator.h>
#include <linux/regulator/of_regulator.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of_gpio.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/thermal.h>
#include <linux/irq.h>
#include <linux/interrupt.h>

/* Register definitions */
#define MAX8973_VOUT					0x0
#define MAX8973_VOUT_DVS				0x1
#define MAX8973_CONTROL1				0x2
#define MAX8973_CONTROL2				0x3
#define MAX8973_CHIPID1					0x4
#define MAX8973_CHIPID2					0x5

#define MAX8973_MAX_VOUT_REG				2

/* MAX8973_VOUT */
#define MAX8973_VOUT_ENABLE				BIT(7)
#define MAX8973_VOUT_MASK				0x7F

/* MAX8973_VOUT_DVS */
#define MAX8973_DVS_VOUT_MASK				0x7F

/* MAX8973_CONTROL1 */
#define MAX8973_SNS_ENABLE				BIT(7)
#define MAX8973_FPWM_EN_M				BIT(6)
#define MAX8973_NFSR_ENABLE				BIT(5)
#define MAX8973_AD_ENABLE				BIT(4)
#define MAX8973_BIAS_ENABLE				BIT(3)
#define MAX8973_FREQSHIFT_9PER				BIT(2)

#define MAX8973_RAMP_12mV_PER_US			0x0
#define MAX8973_RAMP_25mV_PER_US			0x1
#define MAX8973_RAMP_50mV_PER_US			0x2
#define MAX8973_RAMP_200mV_PER_US			0x3
#define MAX8973_RAMP_MASK				0x3

/* MAX8973_CONTROL2 */
#define MAX8973_WDTMR_ENABLE				BIT(6)
#define MAX8973_DISCH_ENBABLE				BIT(5)
#define MAX8973_FT_ENABLE				BIT(4)
#define MAX77621_T_JUNCTION_120				BIT(7)

#define MAX8973_CKKADV_TRIP_MASK			0xC
#define MAX8973_CKKADV_TRIP_DISABLE			0xC
#define MAX8973_CKKADV_TRIP_75mV_PER_US			0x0
#define MAX8973_CKKADV_TRIP_150mV_PER_US		0x4
#define MAX8973_CKKADV_TRIP_75mV_PER_US_HIST_DIS	0x8
#define MAX8973_CONTROL_CLKADV_TRIP_MASK		0x00030000

#define MAX8973_INDUCTOR_MIN_30_PER			0x0
#define MAX8973_INDUCTOR_NOMINAL			0x1
#define MAX8973_INDUCTOR_PLUS_30_PER			0x2
#define MAX8973_INDUCTOR_PLUS_60_PER			0x3
#define MAX8973_CONTROL_INDUCTOR_VALUE_MASK		0x00300000

#define MAX8973_MIN_VOLATGE				606250
#define MAX8973_MAX_VOLATGE				1400000
#define MAX8973_VOLATGE_STEP				6250
#define MAX8973_BUCK_N_VOLTAGE				0x80

#define MAX77621_CHIPID_TJINT_S				BIT(0)

#define MAX77621_NORMAL_OPERATING_TEMP			100000
#define MAX77621_TJINT_WARNING_TEMP_120			120000
#define MAX77621_TJINT_WARNING_TEMP_140			140000

enum device_id {
	MAX8973,
	MAX77621
};

/* Maxim 8973 chip information */
struct max8973_chip {
	struct device *dev;
	struct regulator_desc desc;
	struct regmap *regmap;
	bool enable_external_control;
	int dvs_gpio;
	int lru_index[MAX8973_MAX_VOUT_REG];
	int curr_vout_val[MAX8973_MAX_VOUT_REG];
	int curr_vout_reg;
	int curr_gpio_val;
	struct regulator_ops ops;
	enum device_id id;
	int junction_temp_warning;
	int irq;
	struct thermal_zone_device *tz_device;
};

/*
 * find_voltage_set_register: Find new voltage configuration register (VOUT).
 * The finding of the new VOUT register will be based on the LRU mechanism.
 * Each VOUT register will have different voltage configured . This
 * Function will look if any of the VOUT register have requested voltage set
 * or not.
 *     - If it is already there then it will make that register as most
 *       recently used and return as found so that caller need not to set
 *       the VOUT register but need to set the proper gpios to select this
 *       VOUT register.
 *     - If requested voltage is not found then it will use the least
 *       recently mechanism to get new VOUT register for new configuration
 *       and will return not_found so that caller need to set new VOUT
 *       register and then gpios (both).
 */
static bool find_voltage_set_register(struct max8973_chip *tps,
		int req_vsel, int *vout_reg, int *gpio_val)
{
	int i;
	bool found = false;
	int new_vout_reg = tps->lru_index[MAX8973_MAX_VOUT_REG - 1];
	int found_index = MAX8973_MAX_VOUT_REG - 1;

	for (i = 0; i < MAX8973_MAX_VOUT_REG; ++i) {
		if (tps->curr_vout_val[tps->lru_index[i]] == req_vsel) {
			new_vout_reg = tps->lru_index[i];
			found_index = i;
			found = true;
			goto update_lru_index;
		}
	}

update_lru_index:
	for (i = found_index; i > 0; i--)
		tps->lru_index[i] = tps->lru_index[i - 1];

	tps->lru_index[0] = new_vout_reg;
	*gpio_val = new_vout_reg;
	*vout_reg = MAX8973_VOUT + new_vout_reg;
	return found;
}

static int max8973_dcdc_get_voltage_sel(struct regulator_dev *rdev)
{
	struct max8973_chip *max = rdev_get_drvdata(rdev);
	unsigned int data;
	int ret;

	ret = regmap_read(max->regmap, max->curr_vout_reg, &data);
	if (ret < 0) {
		dev_err(max->dev, "register %d read failed, err = %d\n",
			max->curr_vout_reg, ret);
		return ret;
	}
	return data & MAX8973_VOUT_MASK;
}

static int max8973_dcdc_set_voltage_sel(struct regulator_dev *rdev,
	     unsigned vsel)
{
	struct max8973_chip *max = rdev_get_drvdata(rdev);
	int ret;
	bool found = false;
	int vout_reg = max->curr_vout_reg;
	int gpio_val = max->curr_gpio_val;

	/*
	 * If gpios are available to select the VOUT register then least
	 * recently used register for new configuration.
	 */
	if (gpio_is_valid(max->dvs_gpio))
		found = find_voltage_set_register(max, vsel,
					&vout_reg, &gpio_val);

	if (!found) {
		ret = regmap_update_bits(max->regmap, vout_reg,
					MAX8973_VOUT_MASK, vsel);
		if (ret < 0) {
			dev_err(max->dev, "register %d update failed, err %d\n",
				 vout_reg, ret);
			return ret;
		}
		max->curr_vout_reg = vout_reg;
		max->curr_vout_val[gpio_val] = vsel;
	}

	/* Select proper VOUT register vio gpios */
	if (gpio_is_valid(max->dvs_gpio)) {
		gpio_set_value_cansleep(max->dvs_gpio, gpio_val & 0x1);
		max->curr_gpio_val = gpio_val;
	}
	return 0;
}

static int max8973_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
	struct max8973_chip *max = rdev_get_drvdata(rdev);
	int ret;
	int pwm;

	/* Enable force PWM mode in FAST mode only. */
	switch