Author: manu
Date: Sat Dec 1 20:31:49 2018
New Revision: 341386
URL: https://svnweb.freebsd.org/changeset/base/341386
Log:
Add Silergy SYR827 PMIC driver
SYR827 is a PMIC that can output a voltage from 0.7125V to 1.5V in 12.5mV
steps
It's controlled via I2C.
MFC after: 1 month
Added:
head/sys/dev/iicbus/syr827.c (contents, props changed)
Modified:
head/sys/arm64/conf/GENERIC
head/sys/conf/files
Modified: head/sys/arm64/conf/GENERIC
==============================================================================
--- head/sys/arm64/conf/GENERIC Sat Dec 1 20:31:05 2018 (r341385)
+++ head/sys/arm64/conf/GENERIC Sat Dec 1 20:31:49 2018 (r341386)
@@ -211,6 +211,7 @@ device iicbus
device iic
device twsi # Allwinner I2C controller
device rk_i2c # RockChip I2C controller
+device syr827 # Silergy SYR827 PMIC
# Clock and reset controllers
device aw_ccu # Allwinner clock controller
Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files Sat Dec 1 20:31:05 2018 (r341385)
+++ head/sys/conf/files Sat Dec 1 20:31:49 2018 (r341386)
@@ -1826,6 +1826,7 @@ dev/iicbus/ds13rtc.c optional ds13rtc |
ds133x | ds13
dev/iicbus/ds1672.c optional ds1672
dev/iicbus/ds3231.c optional ds3231
dev/iicbus/rtc8583.c optional rtc8583
+dev/iicbus/syr827.c optional ext_resources syr827
dev/iicbus/icee.c optional icee
dev/iicbus/if_ic.c optional ic
dev/iicbus/iic.c optional iic
Added: head/sys/dev/iicbus/syr827.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/iicbus/syr827.c Sat Dec 1 20:31:49 2018
(r341386)
@@ -0,0 +1,354 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2016 Jared McNeill <jmcne...@invisible.ca>
+ * Copyright (c) 2018 Emmanuel Vadot <m...@freebsd.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+#include <sys/kernel.h>
+#include <sys/reboot.h>
+#include <sys/module.h>
+
+#include <dev/iicbus/iicbus.h>
+#include <dev/iicbus/iiconf.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/extres/regulator/regulator.h>
+
+#include "iicbus_if.h"
+#include "regdev_if.h"
+
+#define VSEL0 0x00
+#define VSEL1 0x01
+
+#define VSEL_BUCK_EN (1 << 7)
+#define VSEL_NSEL_MASK 0x3F
+#define VSEL_VOLTAGE_BASE 712500 /* uV */
+#define VSEL_VOLTAGE_STEP 12500 /* uV */
+
+#define ID1 0x03
+#define ID1_VENDOR_MASK 0xE0
+#define ID1_VENDOR_SHIFT 5
+#define ID1_DIE_MASK 0xF
+
+#define ID2 0x4
+#define ID2_DIE_REV_MASK 0xF
+
+static struct ofw_compat_data compat_data[] = {
+ { "silergy,syr827", 1 },
+ { NULL, 0 }
+};
+
+struct syr827_reg_sc {
+ struct regnode *regnode;
+ device_t base_dev;
+ phandle_t xref;
+ struct regnode_std_param *param;
+
+ int volt_reg;
+ int suspend_reg;
+};
+
+struct syr827_softc {
+ uint16_t addr;
+ struct intr_config_hook intr_hook;
+
+ /* Regulator */
+ struct syr827_reg_sc *reg;
+};
+
+static int
+syr827_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size)
+{
+ struct syr827_softc *sc;
+ struct iic_msg msg[2];
+
+ sc = device_get_softc(dev);
+
+ msg[0].slave = sc->addr;
+ msg[0].flags = IIC_M_WR;
+ msg[0].len = 1;
+ msg[0].buf = ®
+
+ msg[1].slave = sc->addr;
+ msg[1].flags = IIC_M_RD;
+ msg[1].len = size;
+ msg[1].buf = data;
+
+ return (iicbus_transfer(dev, msg, 2));
+}
+
+static int
+syr827_write(device_t dev, uint8_t reg, uint8_t val)
+{
+ struct syr827_softc *sc;
+ struct iic_msg msg;
+ uint8_t buffer[2];
+
+ sc = device_get_softc(dev);
+
+ buffer[0] = reg;
+ buffer[1] = val;
+
+ msg.slave = sc->addr;
+ msg.flags = IIC_M_WR;
+ msg.len = 2;
+ msg.buf = buffer;
+
+ return (iicbus_transfer(dev, &msg, 1));
+}
+
+static int
+syr827_regnode_init(struct regnode *regnode)
+{
+ return (0);
+}
+
+static int
+syr827_regnode_enable(struct regnode *regnode, bool enable, int *udelay)
+{
+ struct syr827_reg_sc *sc;
+ uint8_t val;
+
+ sc = regnode_get_softc(regnode);
+
+ syr827_read(sc->base_dev, sc->volt_reg, &val, 1);
+ if (enable)
+ val &= ~VSEL_BUCK_EN;
+ else
+ val |= VSEL_BUCK_EN;
+ syr827_write(sc->base_dev, sc->volt_reg, val);
+
+ *udelay = sc->param->ramp_delay;
+
+ return (0);
+}
+
+static int
+syr827_regnode_set_voltage(struct regnode *regnode, int min_uvolt,
+ int max_uvolt, int *udelay)
+{
+ struct syr827_reg_sc *sc;
+ int cur_uvolt;
+ uint8_t val;
+
+ sc = regnode_get_softc(regnode);
+
+ /* Get current voltage */
+ syr827_read(sc->base_dev, sc->volt_reg, &val, 1);
+ cur_uvolt = (val & VSEL_NSEL_MASK) * VSEL_VOLTAGE_STEP +
+ VSEL_VOLTAGE_BASE;
+
+ /* Set new voltage */
+ val &= ~VSEL_NSEL_MASK;
+ val |= ((min_uvolt - VSEL_VOLTAGE_BASE) / VSEL_VOLTAGE_STEP);
+ syr827_write(sc->base_dev, sc->volt_reg, val);
+
+ /* Time to delay is based on the number of voltage steps */
+ *udelay = sc->param->ramp_delay *
+ (abs(cur_uvolt - min_uvolt) / VSEL_VOLTAGE_STEP);
+
+ return (0);
+}
+
+static int
+syr827_regnode_get_voltage(struct regnode *regnode, int *uvolt)
+{
+ struct syr827_reg_sc *sc;
+ uint8_t val;
+
+ sc = regnode_get_softc(regnode);
+
+ syr827_read(sc->base_dev, sc->volt_reg, &val, 1);
+ *uvolt = (val & VSEL_NSEL_MASK) * VSEL_VOLTAGE_STEP +
+ VSEL_VOLTAGE_BASE;
+
+ return (0);
+}
+
+static regnode_method_t syr827_regnode_methods[] = {
+ /* Regulator interface */
+ REGNODEMETHOD(regnode_init, syr827_regnode_init),
+ REGNODEMETHOD(regnode_enable, syr827_regnode_enable),
+ REGNODEMETHOD(regnode_set_voltage, syr827_regnode_set_voltage),
+ REGNODEMETHOD(regnode_get_voltage, syr827_regnode_get_voltage),
+ REGNODEMETHOD_END
+};
+DEFINE_CLASS_1(syr827_regnode, syr827_regnode_class, syr827_regnode_methods,
+ sizeof(struct syr827_reg_sc), regnode_class);
+
+static struct syr827_reg_sc *
+syr827_reg_attach(device_t dev, phandle_t node)
+{
+ struct syr827_reg_sc *reg_sc;
+ struct regnode_init_def initdef;
+ struct regnode *regnode;
+ int suspend_reg;
+
+ memset(&initdef, 0, sizeof(initdef));
+ regulator_parse_ofw_stdparam(dev, node, &initdef);
+ initdef.id = 0;
+ initdef.ofw_node = node;
+ regnode = regnode_create(dev, &syr827_regnode_class, &initdef);
+ if (regnode == NULL) {
+ device_printf(dev, "cannot create regulator\n");
+ return (NULL);
+ }
+
+ reg_sc = regnode_get_softc(regnode);
+ reg_sc->regnode = regnode;
+ reg_sc->base_dev = dev;
+ reg_sc->xref = OF_xref_from_node(node);
+ reg_sc->param = regnode_get_stdparam(regnode);
+
+ if (OF_getencprop(node, "fcs,suspend-voltage-selector", &suspend_reg,
+ sizeof(uint32_t)) <= 0)
+ suspend_reg = 0;
+
+ switch (suspend_reg) {
+ case 0:
+ reg_sc->suspend_reg = VSEL0;
+ reg_sc->volt_reg = VSEL1;
+ break;
+ case 1:
+ reg_sc->suspend_reg = VSEL1;
+ reg_sc->volt_reg = VSEL0;
+ break;
+ }
+
+ regnode_register(regnode);
+
+ return (reg_sc);
+}
+
+static int
+syr827_regdev_map(device_t dev, phandle_t xref, int ncells, pcell_t *cells,
+ intptr_t *num)
+{
+ struct syr827_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (sc->reg->xref != xref)
+ return (ENXIO);
+
+ *num = 0;
+
+ return (0);
+}
+
+static int
+syr827_probe(device_t dev)
+{
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
+ return (ENXIO);
+
+ device_set_desc(dev, "Silergy SYR827 regulator");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static void
+syr827_start(void *pdev)
+{
+ struct syr827_softc *sc;
+ device_t dev;
+ uint8_t val;
+
+ dev = pdev;
+ sc = device_get_softc(dev);
+
+ if (bootverbose) {
+ syr827_read(dev, ID1, &val, 1);
+ device_printf(dev, "Vendor ID: %x, DIE ID: %x\n",
+ (val & ID1_VENDOR_MASK) >> ID1_VENDOR_SHIFT,
+ val & ID1_DIE_MASK);
+ syr827_read(dev, ID2, &val, 1);
+ device_printf(dev, "DIE Rev: %x\n", val & ID2_DIE_REV_MASK);
+ }
+
+ config_intrhook_disestablish(&sc->intr_hook);
+}
+
+static int
+syr827_attach(device_t dev)
+{
+ struct syr827_softc *sc;
+ phandle_t node;
+
+ sc = device_get_softc(dev);
+ node = ofw_bus_get_node(dev);
+
+ sc->addr = iicbus_get_addr(dev);
+
+ sc->intr_hook.ich_func = syr827_start;
+ sc->intr_hook.ich_arg = dev;
+
+ if (config_intrhook_establish(&sc->intr_hook) != 0)
+ return (ENOMEM);
+
+ sc->reg = syr827_reg_attach(dev, node);
+ if (sc->reg == NULL) {
+ device_printf(dev, "cannot attach regulator\n");
+ return (ENXIO);
+ }
+
+ return (0);
+}
+
+static device_method_t syr827_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, syr827_probe),
+ DEVMETHOD(device_attach, syr827_attach),
+
+ /* Regdev interface */
+ DEVMETHOD(regdev_map, syr827_regdev_map),
+
+ DEVMETHOD_END
+};
+
+static driver_t syr827_driver = {
+ "syr827",
+ syr827_methods,
+ sizeof(struct syr827_softc),
+};
+
+static devclass_t syr827_devclass;
+
+EARLY_DRIVER_MODULE(syr827, iicbus, syr827_driver, syr827_devclass, 0, 0,
+ BUS_PASS_RESOURCE);
+MODULE_VERSION(syr827, 1);
+MODULE_DEPEND(syr827, iicbus, 1, 1, 1);
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