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mfd: Add support for Maxim MAX96752F
The MAX96752F/MAX96754F deserializers convert a single- or dual-link GMSL2 serial input to single or dual OLDI. They also send and receive side-channel and peripheral control data, enabling full-duplex, single wire, bidirectional transmission of video and data over 15 meter cables. Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com> Change-Id: Ibac9f881bd832e96a8606b9f6492e80f8d2494c6
This commit is contained in:
Wyon Bi
Tao Huang
parent
b1244ddff6
commit
ad3d90b0ba
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@ -921,6 +921,15 @@ config MFD_MAX8998
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additional drivers must be enabled in order to use the functionality
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of the device.
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config MFD_MAX96752F
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tristate "Maxim Semiconductor MAX96752F GMSL2 Deserializer Support"
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depends on I2C
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select MFD_CORE
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select REGMAP_I2C
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select I2C_MUX
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help
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Say yes here to add support for Maxim Semiconductor MAX96752F.
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config MFD_MT6360
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tristate "Mediatek MT6360 SubPMIC"
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select MFD_CORE
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@ -170,6 +170,7 @@ max8925-objs := max8925-core.o max8925-i2c.o
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obj-$(CONFIG_MFD_MAX8925) += max8925.o
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obj-$(CONFIG_MFD_MAX8997) += max8997.o max8997-irq.o
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obj-$(CONFIG_MFD_MAX8998) += max8998.o max8998-irq.o
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obj-$(CONFIG_MFD_MAX96752F) += max96752f.o
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obj-$(CONFIG_MFD_MP2629) += mp2629.o
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194
drivers/mfd/max96752f.c
Normal file
194
drivers/mfd/max96752f.c
Normal file
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@ -0,0 +1,194 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Maxim MAX96752F MFD driver
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*
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* Copyright (C) 2022 Rockchip Electronics Co. Ltd.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/i2c-mux.h>
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#include <linux/gpio/consumer.h>
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#include <linux/regmap.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/max96752f.h>
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static const struct mfd_cell max96752f_devs[] = {
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{
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.name = "max96752f-pinctrl",
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.of_compatible = "maxim,max96752f-pinctrl",
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}, {
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.name = "max96752f-gpio",
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.of_compatible = "maxim,max96752f-gpio",
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}, {
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.name = "max96752f-bridge",
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.of_compatible = "maxim,max96752f-bridge",
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},
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};
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static int max96752f_select(struct i2c_mux_core *muxc, u32 chan)
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{
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return 0;
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}
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static bool max96752f_volatile_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case 0x0002:
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case 0x0140:
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case 0x01ce:
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case 0x0203 ... 0x022f:
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return false;
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default:
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return true;
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}
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}
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static const struct reg_default max96752f_reg_defaults[] = {
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{ 0x0002, 0x47 },
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{ 0x0140, 0x21 },
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{ 0x01ce, 0x06 },
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{ 0x0203, 0x84 }, { 0x0204, 0xa1 }, { 0x0205, 0x41 },
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{ 0x0206, 0x81 }, { 0x0207, 0xa2 }, { 0x0208, 0x42 },
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{ 0x0209, 0x81 }, { 0x020a, 0xa3 }, { 0x020b, 0x43 },
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{ 0x020c, 0x81 }, { 0x020d, 0xa4 }, { 0x020e, 0x44 },
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{ 0x020f, 0x81 }, { 0x0210, 0xa5 }, { 0x0211, 0x45 },
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{ 0x0212, 0x81 }, { 0x0213, 0xa6 }, { 0x0214, 0x46 },
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{ 0x0215, 0x81 }, { 0x0216, 0xa7 }, { 0x0217, 0x47 },
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{ 0x0218, 0x81 }, { 0x0219, 0xa8 }, { 0x021a, 0x48 },
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{ 0x021b, 0x80 }, { 0x021c, 0xa9 }, { 0x021d, 0x49 },
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{ 0x021e, 0x80 }, { 0x021f, 0xaa }, { 0x0220, 0x4a },
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{ 0x0221, 0x80 }, { 0x0222, 0x2b }, { 0x0223, 0x4b },
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{ 0x0224, 0x80 }, { 0x0225, 0x2c }, { 0x0226, 0x4c },
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{ 0x0227, 0x80 }, { 0x0228, 0x2d }, { 0x0229, 0x4d },
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{ 0x022a, 0x18 }, { 0x022b, 0x4e }, { 0x022c, 0x4e },
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{ 0x022d, 0x18 }, { 0x022e, 0x4f }, { 0x022f, 0x4f },
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};
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static const struct regmap_config max96752f_regmap_config = {
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.name = "max96752f",
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.reg_bits = 16,
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.val_bits = 8,
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.max_register = 0x25d,
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.volatile_reg = max96752f_volatile_reg,
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.reg_defaults = max96752f_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(max96752f_reg_defaults),
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.cache_type = REGCACHE_RBTREE,
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.use_single_write = true,
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};
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static const unsigned short addr_list[] = {
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0x48, 0x4a, 0x4c, 0x68, 0x6a, 0x6c, 0x28, 0x2a, I2C_CLIENT_END
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};
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void max96752f_regcache_sync(struct max96752f *max96752f)
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{
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struct i2c_client *client = max96752f->client;
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u16 addr = client->addr;
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u32 id;
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int i, ret;
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regcache_cache_only(max96752f->regmap, false);
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for (i = 0; addr_list[i] != I2C_CLIENT_END; i++) {
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client->addr = addr_list[i];
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ret = regmap_read(max96752f->regmap, 0x000d, &id);
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if (ret < 0)
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continue;
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if (id == 0x82) {
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regmap_write(max96752f->regmap, 0x0000, addr << 1);
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break;
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}
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}
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client->addr = addr;
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regcache_sync(max96752f->regmap);
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}
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EXPORT_SYMBOL(max96752f_regcache_sync);
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static int max96752f_i2c_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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struct device_node *child;
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struct max96752f *max96752f;
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unsigned int nr = 0;
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int ret;
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for_each_available_child_of_node(dev->of_node, child) {
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if (!of_find_property(child, "reg", NULL))
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continue;
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nr++;
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}
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max96752f = devm_kzalloc(dev, sizeof(*max96752f), GFP_KERNEL);
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if (!max96752f)
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return -ENOMEM;
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max96752f->muxc = i2c_mux_alloc(client->adapter, dev, nr, 0,
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I2C_MUX_LOCKED, max96752f_select, NULL);
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if (!max96752f->muxc)
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return -ENOMEM;
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max96752f->dev = dev;
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max96752f->client = client;
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i2c_set_clientdata(client, max96752f);
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max96752f->regmap = devm_regmap_init_i2c(client,
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&max96752f_regmap_config);
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if (IS_ERR(max96752f->regmap))
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return dev_err_probe(dev, PTR_ERR(max96752f->regmap),
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"failed to initialize regmap\n");
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regcache_cache_only(max96752f->regmap, true);
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ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, max96752f_devs,
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ARRAY_SIZE(max96752f_devs), NULL, 0, NULL);
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if (ret)
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return ret;
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for_each_available_child_of_node(dev->of_node, child) {
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if (of_property_read_u32(child, "reg", &nr))
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continue;
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ret = i2c_mux_add_adapter(max96752f->muxc, 0, nr, 0);
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if (ret) {
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i2c_mux_del_adapters(max96752f->muxc);
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return ret;
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}
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}
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return 0;
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}
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static void max96752f_i2c_shutdown(struct i2c_client *client)
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{
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struct max96752f *max96752f = i2c_get_clientdata(client);
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regmap_update_bits(max96752f->regmap, 0x0010, RESET_ALL,
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FIELD_PREP(RESET_ALL, 1));
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}
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static const struct of_device_id max96752f_of_match[] = {
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{ .compatible = "maxim,max96752f", },
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{}
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};
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MODULE_DEVICE_TABLE(of, max96752f_of_match);
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static struct i2c_driver max96752f_i2c_driver = {
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.driver = {
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.name = "max96752f",
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.of_match_table = of_match_ptr(max96752f_of_match),
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},
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.probe_new = max96752f_i2c_probe,
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.shutdown = max96752f_i2c_shutdown,
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};
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module_i2c_driver(max96752f_i2c_driver);
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MODULE_AUTHOR("Wyon Bi <bivvy.bi@rock-chips.com>");
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MODULE_DESCRIPTION("Maxim MAX96752F MFD driver");
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MODULE_LICENSE("GPL");
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106
include/linux/mfd/max96752f.h
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106
include/linux/mfd/max96752f.h
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@ -0,0 +1,106 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Defining registers address and its bit definitions of MAX96752F
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*
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* Copyright (c) 2022 Rockchip Electronics Co. Ltd.
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*/
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#ifndef _MFD_MAX96752F_H_
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#define _MFD_MAX96752F_H_
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#include <linux/bitfield.h>
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#define GPIO_A_REG(gpio) (0x0200 + ((gpio) * 3))
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#define GPIO_B_REG(gpio) (0x0201 + ((gpio) * 3))
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#define GPIO_C_REG(gpio) (0x0202 + ((gpio) * 3))
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#define OLDI_REG(x) (0x01cd + (x))
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/* 0000h */
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#define DEV_ADDR GENMASK(7, 1)
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#define CFG_BLOCK BIT(0)
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/* 0001h */
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#define LVDS_HALFSW BIT(7)
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#define IIC_2_EN BIT(5)
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#define IIC_1_EN BIT(4)
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#define TX_RATE GENMASK(3, 2)
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#define RX_RATE GENMASK(1, 0)
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/* 0002h */
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#define LOCK_CFG BIT(7)
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#define VID_EN BIT(6)
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#define DIS_LOCAL_CC BIT(5)
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#define DIS_REM_CC BIT(4)
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#define AUD_TX_EN BIT(2)
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/* 0003h */
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#define GMSL2 BIT(5)
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#define I2CSEL BIT(4)
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#define UART_2_EN BIT(3)
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#define UART_1_EN BIT(2)
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#define VIDEO_LOCK BIT(0)
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/* 000Dh */
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#define DEV_ID GENMASK(7, 0)
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/* 000Eh */
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#define DEV_REV GENMASK(3, 0)
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/* 0010h */
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#define RESET_ALL BIT(7)
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#define RESET_LINK BIT(6)
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#define RESET_ONESHOT BIT(5)
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#define AUTO_LINK BIT(4)
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#define SLEEP BIT(3)
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#define LINK_CFG GENMASK(1, 0)
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/* 0108h */
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#define VID_LOCK BIT(6)
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/* 0140h */
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#define AUD_RX_EN BIT(0)
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/* 01CEh */
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#define OLDI_OUTSEL BIT(7)
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#define OLDI_FORMAT BIT(6)
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#define OLDI_4TH_LANE BIT(5)
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#define OLDI_SWAP_AB BIT(4)
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#define OLDI_SPL_EN BIT(3)
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#define OLDI_SPL_MODE GENMASK(2, 1)
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#define OLDI_SPL_POL BIT(0)
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/* 01CFh */
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#define PD_LVDS_B BIT(7)
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#define PD_LVDS_A BIT(6)
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#define OLDI_DUP BIT(1)
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#define SSEN BIT(0)
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/* 0200h */
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#define RES_CFG BIT(7)
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#define TX_PRIO BIT(6)
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#define TX_COMP_EN BIT(5)
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#define GPIO_OUT BIT(4)
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#define GPIO_IN BIT(3)
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#define GPIO_RX_EN BIT(2)
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#define GPIO_TX_EN BIT(1)
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#define GPIO_OUT_DIS BIT(0)
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/* 0201h */
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#define PULL_UPDN_SEL GENMASK(7, 6)
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#define OUT_TYPE BIT(5)
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#define GPIO_TX_ID GENMASK(4, 0)
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/* 0202h */
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#define OVR_RES_CFG BIT(7)
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#define GPIO_RX_ID GENMASK(4, 0)
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struct max96752f {
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struct device *dev;
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struct regmap *regmap;
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struct i2c_client *client;
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struct i2c_mux_core *muxc;
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};
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void max96752f_regcache_sync(struct max96752f *max96752f);
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#endif /* _MFD_MAX96752F_H_ */
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