Re: [PATCHv3] mfd: cpcap: Add minimal support
From: Lee Jones
Date: Tue Jan 03 2017 - 11:51:13 EST
On Mon, 05 Dec 2016, Tony Lindgren wrote:
> Many Motorola phones like droid 4 are using a custom PMIC called CPCAP
> or 6556002. We can support it's core features quite easily with regmap_spi
> and regmap_irq.
>
> The children of cpcap, such as regulators, ADC and USB, can be just regular
> device drivers and defined in the dts file. They get probed as we call
> of_platform_populate() at the end of our probe, and then the children
> can just call dev_get_regmap(dev.parent, NULL) to get the regmap.
>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: Marcel Partap <mpartap@xxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Michael Scott <michael.scott@xxxxxxxxxx>
> Acked-by: Rob Herring <robh@xxxxxxxxxx>
> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
> ---
>
> Changes from v2:
>
> - Fix typos in binding documentation for #size-cells and spi-cs-high
> - Add ack from Rob
>
> ---
> .../devicetree/bindings/mfd/motorola-cpcap.txt | 31 +++
> drivers/mfd/Kconfig | 11 +
> drivers/mfd/Makefile | 1 +
> drivers/mfd/motorola-cpcap.c | 244 +++++++++++++++++
> include/linux/mfd/motorola-cpcap.h | 289 +++++++++++++++++++++
> 5 files changed, 576 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/motorola-cpcap.txt
> create mode 100644 drivers/mfd/motorola-cpcap.c
> create mode 100644 include/linux/mfd/motorola-cpcap.h
>
> diff --git a/Documentation/devicetree/bindings/mfd/motorola-cpcap.txt b/Documentation/devicetree/bindings/mfd/motorola-cpcap.txt
> new file mode 100644
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/motorola-cpcap.txt
> @@ -0,0 +1,31 @@
> +Motorola CPCAP PMIC device tree binding
> +
> +Required properties:
> +- compatible : One or both of "motorola,cpcap" or "ste,6556002"
> +- reg : SPI chip select
> +- interrupt-parent : The parent interrupt controller
> +- interrupts : The interrupt line the device is connected to
> +- interrupt-controller : Marks the device node as an interrupt controller
> +- #interrupt-cells : The number of cells to describe an IRQ, should be 2
> +- #address-cells : Child device offset number of cells, should be 1
> +- #size-cells : Child device size number of cells, should be 0
> +- spi-max-frequency : Typically set to 3000000
> +- spi-cs-high : SPI chip select direction
> +
> +Example:
> +
> +&mcspi1 {
> + cpcap: pmic@0 {
> + compatible = "motorola,cpcap", "ste,6556002";
> + reg = <0>; /* cs0 */
> + interrupt-parent = <&gpio1>;
> + interrupts = <7 IRQ_TYPE_EDGE_RISING>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + spi-max-frequency = <3000000>;
> + spi-cs-high;
> + };
> +};
> +
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -714,6 +714,17 @@ config EZX_PCAP
> This enables the PCAP ASIC present on EZX Phones. This is
> needed for MMC, TouchScreen, Sound, USB, etc..
>
> +config MFD_CPCAP
> + tristate "Support for Motorola CPCAP"
> + depends on SPI
> + depends on OF || COMPILE_TEST
> + select REGMAP_SPI
> + select REGMAP_IRQ
> + help
> + Say yes here if you want to include driver for CPCAP.
> + It is used on many Motorola phones and tablets as a PMIC.
> + At least Motorola Droid 4 is known to use CPCAP.
> +
> config MFD_VIPERBOARD
> tristate "Nano River Technologies Viperboard"
> select MFD_CORE
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -97,6 +97,7 @@ obj-$(CONFIG_MFD_MC13XXX_I2C) += mc13xxx-i2c.o
> obj-$(CONFIG_MFD_CORE) += mfd-core.o
>
> obj-$(CONFIG_EZX_PCAP) += ezx-pcap.o
> +obj-$(CONFIG_MFD_CPCAP) += motorola-cpcap.o
>
> obj-$(CONFIG_MCP) += mcp-core.o
> obj-$(CONFIG_MCP_SA11X0) += mcp-sa11x0.o
> diff --git a/drivers/mfd/motorola-cpcap.c b/drivers/mfd/motorola-cpcap.c
> new file mode 100644
> --- /dev/null
> +++ b/drivers/mfd/motorola-cpcap.c
> @@ -0,0 +1,244 @@
> +/*
> + * Motorola CPCAP PMIC core driver
> + *
> + * Copyright (C) 2016 Tony Lindgren <tony@xxxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/device.h>
> +#include <linux/err.h>
> +#include <linux/interrupt.h>
> +#include <linux/irq.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +#include <linux/sysfs.h>
> +
> +#include <linux/mfd/motorola-cpcap.h>
> +#include <linux/spi/spi.h>
> +
> +#define CPCAP_NR_IRQ_REG_BANKS 6
> +#define CPCAP_NR_IRQ_CHIPS 3
> +
> +struct cpcap_ddata {
> + struct spi_device *spi;
> + struct regmap_irq *irqs;
> + struct regmap_irq_chip_data *irqdata[CPCAP_NR_IRQ_CHIPS];
> + const struct regmap_config *regmap_conf;
> + struct regmap *regmap;
> +};
> +
> +static int cpcap_check_revision(struct cpcap_ddata *cpcap)
> +{
> + u16 vendor, rev;
> + int ret;
> +
> + ret = cpcap_get_vendor(&cpcap->spi->dev, cpcap->regmap, &vendor);
> + if (ret)
> + return ret;
> +
> + ret = cpcap_get_revision(&cpcap->spi->dev, cpcap->regmap, &rev);
> + if (ret)
> + return ret;
> +
> + dev_info(&cpcap->spi->dev, "CPCAP vendor: %s rev: %i.%i (%x)\n",
> + vendor == CPCAP_VENDOR_ST ? "ST" : "TI",
> + CPCAP_REVISION_MAJOR(rev), CPCAP_REVISION_MINOR(rev),
> + rev);
> +
> + if (rev < CPCAP_REVISION_2_1) {
> + dev_info(&cpcap->spi->dev,
> + "Please add old CPCAP revision support as needed\n");
> + return -ENODEV;
> + }
> +
> + return 0;
> +}
> +
> +/*
> + * First two irq chips are the two private macro interrupt chips, the third
> + * irq chip is for register banks 1 - 4 and is available for drivers to use.
> + */
> +static struct regmap_irq_chip cpcap_irq_chip[CPCAP_NR_IRQ_CHIPS] = {
> + {
> + .name = "cpcap-m2",
> + .num_regs = 1,
> + .status_base = CPCAP_REG_MI1,
> + .ack_base = CPCAP_REG_MI1,
> + .mask_base = CPCAP_REG_MIM1,
> + .use_ack = true,
> + },
> + {
> + .name = "cpcap-m2",
> + .num_regs = 1,
> + .status_base = CPCAP_REG_MI2,
> + .ack_base = CPCAP_REG_MI2,
> + .mask_base = CPCAP_REG_MIM2,
> + .use_ack = true,
> + },
> + {
> + .name = "cpcap1-4",
> + .num_regs = 4,
> + .status_base = CPCAP_REG_INT1,
> + .ack_base = CPCAP_REG_INT1,
> + .mask_base = CPCAP_REG_INTM1,
> + .type_base = CPCAP_REG_INTS1,
> + .use_ack = true,
> + },
> +};
> +
> +static int cpcap_init_irq_chip(struct cpcap_ddata *cpcap, int irq_chip,
> + int irq_start, int nr_irqs)
> +{
> + struct regmap_irq_chip *chip = &cpcap_irq_chip[irq_chip];
> + int i, ret;
> +
> + for (i = irq_start; i < irq_start + nr_irqs; i++) {
> + struct regmap_irq *cpcap_irq = &cpcap->irqs[i];
> +
> + cpcap_irq->reg_offset =
> + ((i - irq_start) / cpcap->regmap_conf->val_bits) *
> + cpcap->regmap_conf->reg_stride;
> + cpcap_irq->mask = BIT(i % cpcap->regmap_conf->val_bits);
If a code segment takes more than a few seconds to work out, it's
either too cluttered (break it down), too complex (simplify it) or if
neither of the first two approaches are possible, then a comment is
required.
> + }
> + chip->irqs = &cpcap->irqs[irq_start];
> + chip->num_irqs = nr_irqs;
> + chip->irq_drv_data = cpcap;
> +
> + ret = devm_regmap_add_irq_chip(&cpcap->spi->dev, cpcap->regmap,
> + cpcap->spi->irq,
> + IRQF_TRIGGER_RISING |
> + IRQF_SHARED, -1,
> + chip, &cpcap->irqdata[irq_chip]);
> + if (ret) {
> + dev_err(&cpcap->spi->dev, "could not add irq chip %i: %i\n",
> + irq_chip, ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int cpcap_init_irq(struct cpcap_ddata *cpcap)
> +{
> + int ret;
> +
> + cpcap->irqs = devm_kzalloc(&cpcap->spi->dev,
> + sizeof(*cpcap->irqs) *
> + CPCAP_NR_IRQ_REG_BANKS *
> + cpcap->regmap_conf->val_bits,
> + GFP_KERNEL);
> + if (!cpcap->irqs)
> + return -ENOMEM;
> +
> + ret = cpcap_init_irq_chip(cpcap, 0, 0, 16);
> + if (ret)
> + return ret;
> +
> + ret = cpcap_init_irq_chip(cpcap, 1, 16, 16);
> + if (ret)
> + return ret;
> +
> + ret = cpcap_init_irq_chip(cpcap, 2, 32, 64);
> + if (ret)
> + return ret;
> +
> + enable_irq_wake(cpcap->spi->irq);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id cpcap_of_match[] = {
> + { .compatible = "motorola,cpcap", },
> + { .compatible = "st,6556002", },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, cpcap_of_match);
> +
> +static const struct regmap_config cpcap_regmap_config = {
> + .reg_bits = 16,
> + .reg_stride = 4,
> + .pad_bits = 0,
> + .val_bits = 16,
> + .write_flag_mask = 0x8000,
> + .max_register = CPCAP_REG_ST_TEST2,
> + .cache_type = REGCACHE_NONE,
> + .reg_format_endian = REGMAP_ENDIAN_LITTLE,
> + .val_format_endian = REGMAP_ENDIAN_LITTLE,
> +};
> +
> +static int cpcap_probe(struct spi_device *spi)
> +{
> + const struct of_device_id *match;
> + int ret = -EINVAL;
What is the purpose of initialising ret?
> + struct cpcap_ddata *cpcap;
> +
> + match = of_match_device(of_match_ptr(cpcap_of_match), &spi->dev);
> + if (!match)
> + return -ENODEV;
> +
> + cpcap = devm_kzalloc(&spi->dev, sizeof(*cpcap), GFP_KERNEL);
> + if (!cpcap)
> + return -ENOMEM;
> +
> + cpcap->spi = spi;
> + spi_set_drvdata(spi, cpcap);
> +
> + spi->bits_per_word = 16;
> + spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
> +
> + ret = spi_setup(spi);
> + if (ret < 0)
> + return ret;
Is it possible for spi_setup() to return >0?
If not, then "if (!ret)" will do.
> + cpcap->regmap_conf = &cpcap_regmap_config;
> + cpcap->regmap = devm_regmap_init_spi(spi, &cpcap_regmap_config);
> + if (IS_ERR(cpcap->regmap)) {
> + ret = PTR_ERR(cpcap->regmap);
> + dev_err(&cpcap->spi->dev, "Failed to initialize regmap: %d\n",
> + ret);
> +
> + return ret;
> + }
> +
> + ret = cpcap_check_revision(cpcap);
> + if (ret) {
> + dev_err(&cpcap->spi->dev, "Failed to detect CPCAP: %i\n", ret);
> + return ret;
> + }
> +
> + ret = cpcap_init_irq(cpcap);
> + if (ret)
> + return ret;
> +
> + return of_platform_populate(spi->dev.of_node, NULL, NULL,
> + &cpcap->spi->dev);
> +}
> +
> +static int cpcap_remove(struct spi_device *pdev)
> +{
> + struct cpcap_ddata *cpcap = spi_get_drvdata(pdev);
> +
> + of_platform_depopulate(&cpcap->spi->dev);
> +
> + return 0;
> +}
> +
> +static struct spi_driver cpcap_driver = {
> + .driver = {
> + .name = "cpcap-core",
> + .of_match_table = cpcap_of_match,
of_match_ptr() ?
> + },
> + .probe = cpcap_probe,
> + .remove = cpcap_remove,
> +};
> +module_spi_driver(cpcap_driver);
> +
> +MODULE_ALIAS("platform:cpcap");
> +MODULE_DESCRIPTION("CPCAP driver");
> +MODULE_AUTHOR("Tony Lindgren <tony@xxxxxxxxxxx>");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/mfd/motorola-cpcap.h b/include/linux/mfd/motorola-cpcap.h
> new file mode 100644
> --- /dev/null
> +++ b/include/linux/mfd/motorola-cpcap.h
> @@ -0,0 +1,289 @@
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * Note that the register defines are based on earlier cpcap.h in
> + * Motorola Linux kernel tree Copyright (C) 2007-2009 Motorola, Inc.
> + *
> + * Rewritten for the real register offsets instead of enumeration
> + * to make the defines usable with Linux kernel regmap support
'\n'
> + * Copyright (C) 2016 Tony Lindgren <tony@xxxxxxxxxxx>.
Actually, it's more traditional to place the CR at the top.
> + */
> +
> +#define CPCAP_VENDOR_ST 0
> +#define CPCAP_VENDOR_TI 1
> +
> +#define CPCAP_REVISION_MAJOR(r) (((r) >> 4) + 1)
> +#define CPCAP_REVISION_MINOR(r) ((r) & 0xf)
> +
> +#define CPCAP_REVISION_1_0 0x08
> +#define CPCAP_REVISION_1_1 0x09
> +#define CPCAP_REVISION_2_0 0x10
> +#define CPCAP_REVISION_2_1 0x11
> +
> +/* CPCAP registers */
> +#define CPCAP_REG_INT1 0x0000 /* Interrupt 1 */
> +#define CPCAP_REG_INT2 0x0004 /* Interrupt 2 */
> +#define CPCAP_REG_INT3 0x0008 /* Interrupt 3 */
> +#define CPCAP_REG_INT4 0x000c /* Interrupt 4 */
> +#define CPCAP_REG_INTM1 0x0010 /* Interrupt Mask 1 */
> +#define CPCAP_REG_INTM2 0x0014 /* Interrupt Mask 2 */
> +#define CPCAP_REG_INTM3 0x0018 /* Interrupt Mask 3 */
> +#define CPCAP_REG_INTM4 0x001c /* Interrupt Mask 4 */
> +#define CPCAP_REG_INTS1 0x0020 /* Interrupt Sense 1 */
> +#define CPCAP_REG_INTS2 0x0024 /* Interrupt Sense 2 */
> +#define CPCAP_REG_INTS3 0x0028 /* Interrupt Sense 3 */
> +#define CPCAP_REG_INTS4 0x002c /* Interrupt Sense 4 */
> +#define CPCAP_REG_ASSIGN1 0x0030 /* Resource Assignment 1 */
> +#define CPCAP_REG_ASSIGN2 0x0034 /* Resource Assignment 2 */
> +#define CPCAP_REG_ASSIGN3 0x0038 /* Resource Assignment 3 */
> +#define CPCAP_REG_ASSIGN4 0x003c /* Resource Assignment 4 */
> +#define CPCAP_REG_ASSIGN5 0x0040 /* Resource Assignment 5 */
> +#define CPCAP_REG_ASSIGN6 0x0044 /* Resource Assignment 6 */
> +#define CPCAP_REG_VERSC1 0x0048 /* Version Control 1 */
> +#define CPCAP_REG_VERSC2 0x004c /* Version Control 2 */
> +
> +#define CPCAP_REG_MI1 0x0200 /* Macro Interrupt 1 */
> +#define CPCAP_REG_MIM1 0x0204 /* Macro Interrupt Mask 1 */
> +#define CPCAP_REG_MI2 0x0208 /* Macro Interrupt 2 */
> +#define CPCAP_REG_MIM2 0x020c /* Macro Interrupt Mask 2 */
> +#define CPCAP_REG_UCC1 0x0210 /* UC Control 1 */
> +#define CPCAP_REG_UCC2 0x0214 /* UC Control 2 */
> +
> +#define CPCAP_REG_PC1 0x021c /* Power Cut 1 */
> +#define CPCAP_REG_PC2 0x0220 /* Power Cut 2 */
> +#define CPCAP_REG_BPEOL 0x0224 /* BP and EOL */
> +#define CPCAP_REG_PGC 0x0228 /* Power Gate and Control */
> +#define CPCAP_REG_MT1 0x022c /* Memory Transfer 1 */
> +#define CPCAP_REG_MT2 0x0230 /* Memory Transfer 2 */
> +#define CPCAP_REG_MT3 0x0234 /* Memory Transfer 3 */
> +#define CPCAP_REG_PF 0x0238 /* Print Format */
> +
> +#define CPCAP_REG_SCC 0x0400 /* System Clock Control */
> +#define CPCAP_REG_SW1 0x0404 /* Stop Watch 1 */
> +#define CPCAP_REG_SW2 0x0408 /* Stop Watch 2 */
> +#define CPCAP_REG_UCTM 0x040c /* UC Turbo Mode */
> +#define CPCAP_REG_TOD1 0x0410 /* Time of Day 1 */
> +#define CPCAP_REG_TOD2 0x0414 /* Time of Day 2 */
> +#define CPCAP_REG_TODA1 0x0418 /* Time of Day Alarm 1 */
> +#define CPCAP_REG_TODA2 0x041c /* Time of Day Alarm 2 */
> +#define CPCAP_REG_DAY 0x0420 /* Day */
> +#define CPCAP_REG_DAYA 0x0424 /* Day Alarm */
> +#define CPCAP_REG_VAL1 0x0428 /* Validity 1 */
> +#define CPCAP_REG_VAL2 0x042c /* Validity 2 */
> +
> +#define CPCAP_REG_SDVSPLL 0x0600 /* Switcher DVS and PLL */
> +#define CPCAP_REG_SI2CC1 0x0604 /* Switcher I2C Control 1 */
> +#define CPCAP_REG_Si2CC2 0x0608 /* Switcher I2C Control 2 */
> +#define CPCAP_REG_S1C1 0x060c /* Switcher 1 Control 1 */
> +#define CPCAP_REG_S1C2 0x0610 /* Switcher 1 Control 2 */
> +#define CPCAP_REG_S2C1 0x0614 /* Switcher 2 Control 1 */
> +#define CPCAP_REG_S2C2 0x0618 /* Switcher 2 Control 2 */
> +#define CPCAP_REG_S3C 0x061c /* Switcher 3 Control */
> +#define CPCAP_REG_S4C1 0x0620 /* Switcher 4 Control 1 */
> +#define CPCAP_REG_S4C2 0x0624 /* Switcher 4 Control 2 */
> +#define CPCAP_REG_S5C 0x0628 /* Switcher 5 Control */
> +#define CPCAP_REG_S6C 0x062c /* Switcher 6 Control */
> +#define CPCAP_REG_VCAMC 0x0630 /* VCAM Control */
> +#define CPCAP_REG_VCSIC 0x0634 /* VCSI Control */
> +#define CPCAP_REG_VDACC 0x0638 /* VDAC Control */
> +#define CPCAP_REG_VDIGC 0x063c /* VDIG Control */
> +#define CPCAP_REG_VFUSEC 0x0640 /* VFUSE Control */
> +#define CPCAP_REG_VHVIOC 0x0644 /* VHVIO Control */
> +#define CPCAP_REG_VSDIOC 0x0648 /* VSDIO Control */
> +#define CPCAP_REG_VPLLC 0x064c /* VPLL Control */
> +#define CPCAP_REG_VRF1C 0x0650 /* VRF1 Control */
> +#define CPCAP_REG_VRF2C 0x0654 /* VRF2 Control */
> +#define CPCAP_REG_VRFREFC 0x0658 /* VRFREF Control */
> +#define CPCAP_REG_VWLAN1C 0x065c /* VWLAN1 Control */
> +#define CPCAP_REG_VWLAN2C 0x0660 /* VWLAN2 Control */
> +#define CPCAP_REG_VSIMC 0x0664 /* VSIM Control */
> +#define CPCAP_REG_VVIBC 0x0668 /* VVIB Control */
> +#define CPCAP_REG_VUSBC 0x066c /* VUSB Control */
> +#define CPCAP_REG_VUSBINT1C 0x0670 /* VUSBINT1 Control */
> +#define CPCAP_REG_VUSBINT2C 0x0674 /* VUSBINT2 Control */
> +#define CPCAP_REG_URT 0x0678 /* Useroff Regulator Trigger */
> +#define CPCAP_REG_URM1 0x067c /* Useroff Regulator Mask 1 */
> +#define CPCAP_REG_URM2 0x0680 /* Useroff Regulator Mask 2 */
> +
> +#define CPCAP_REG_VAUDIOC 0x0800 /* VAUDIO Control */
> +#define CPCAP_REG_CC 0x0804 /* Codec Control */
> +#define CPCAP_REG_CDI 0x0808 /* Codec Digital Interface */
> +#define CPCAP_REG_SDAC 0x080c /* Stereo DAC */
> +#define CPCAP_REG_SDACDI 0x0810 /* Stereo DAC Digital Interface */
> +#define CPCAP_REG_TXI 0x0814 /* TX Inputs */
> +#define CPCAP_REG_TXMP 0x0818 /* TX MIC PGA's */
> +#define CPCAP_REG_RXOA 0x081c /* RX Output Amplifiers */
> +#define CPCAP_REG_RXVC 0x0820 /* RX Volume Control */
> +#define CPCAP_REG_RXCOA 0x0824 /* RX Codec to Output Amps */
> +#define CPCAP_REG_RXSDOA 0x0828 /* RX Stereo DAC to Output Amps */
> +#define CPCAP_REG_RXEPOA 0x082c /* RX External PGA to Output Amps */
> +#define CPCAP_REG_RXLL 0x0830 /* RX Low Latency */
> +#define CPCAP_REG_A2LA 0x0834 /* A2 Loudspeaker Amplifier */
> +#define CPCAP_REG_MIPIS1 0x0838 /* MIPI Slimbus 1 */
> +#define CPCAP_REG_MIPIS2 0x083c /* MIPI Slimbus 2 */
> +#define CPCAP_REG_MIPIS3 0x0840 /* MIPI Slimbus 3. */
> +#define CPCAP_REG_LVAB 0x0844 /* LMR Volume and A4 Balanced. */
> +
> +#define CPCAP_REG_CCC1 0x0a00 /* Coulomb Counter Control 1 */
> +#define CPCAP_REG_CRM 0x0a04 /* Charger and Reverse Mode */
> +#define CPCAP_REG_CCCC2 0x0a08 /* Coincell and Coulomb Ctr Ctrl 2 */
> +#define CPCAP_REG_CCS1 0x0a0c /* Coulomb Counter Sample 1 */
> +#define CPCAP_REG_CCS2 0x0a10 /* Coulomb Counter Sample 2 */
> +#define CPCAP_REG_CCA1 0x0a14 /* Coulomb Counter Accumulator 1 */
> +#define CPCAP_REG_CCA2 0x0a18 /* Coulomb Counter Accumulator 2 */
> +#define CPCAP_REG_CCM 0x0a1c /* Coulomb Counter Mode */
> +#define CPCAP_REG_CCO 0x0a20 /* Coulomb Counter Offset */
> +#define CPCAP_REG_CCI 0x0a24 /* Coulomb Counter Integrator */
> +
> +#define CPCAP_REG_ADCC1 0x0c00 /* A/D Converter Configuration 1 */
> +#define CPCAP_REG_ADCC2 0x0c04 /* A/D Converter Configuration 2 */
> +#define CPCAP_REG_ADCD0 0x0c08 /* A/D Converter Data 0 */
> +#define CPCAP_REG_ADCD1 0x0c0c /* A/D Converter Data 1 */
> +#define CPCAP_REG_ADCD2 0x0c10 /* A/D Converter Data 2 */
> +#define CPCAP_REG_ADCD3 0x0c14 /* A/D Converter Data 3 */
> +#define CPCAP_REG_ADCD4 0x0c18 /* A/D Converter Data 4 */
> +#define CPCAP_REG_ADCD5 0x0c1c /* A/D Converter Data 5 */
> +#define CPCAP_REG_ADCD6 0x0c20 /* A/D Converter Data 6 */
> +#define CPCAP_REG_ADCD7 0x0c24 /* A/D Converter Data 7 */
> +#define CPCAP_REG_ADCAL1 0x0c28 /* A/D Converter Calibration 1 */
> +#define CPCAP_REG_ADCAL2 0x0c2c /* A/D Converter Calibration 2 */
> +
> +#define CPCAP_REG_USBC1 0x0e00 /* USB Control 1 */
> +#define CPCAP_REG_USBC2 0x0e04 /* USB Control 2 */
> +#define CPCAP_REG_USBC3 0x0e08 /* USB Control 3 */
> +#define CPCAP_REG_UVIDL 0x0e0c /* ULPI Vendor ID Low */
> +#define CPCAP_REG_UVIDH 0x0e10 /* ULPI Vendor ID High */
> +#define CPCAP_REG_UPIDL 0x0e14 /* ULPI Product ID Low */
> +#define CPCAP_REG_UPIDH 0x0e18 /* ULPI Product ID High */
> +#define CPCAP_REG_UFC1 0x0e1c /* ULPI Function Control 1 */
> +#define CPCAP_REG_UFC2 0x0e20 /* ULPI Function Control 2 */
> +#define CPCAP_REG_UFC3 0x0e24 /* ULPI Function Control 3 */
> +#define CPCAP_REG_UIC1 0x0e28 /* ULPI Interface Control 1 */
> +#define CPCAP_REG_UIC2 0x0e2c /* ULPI Interface Control 2 */
> +#define CPCAP_REG_UIC3 0x0e30 /* ULPI Interface Control 3 */
> +#define CPCAP_REG_USBOTG1 0x0e34 /* USB OTG Control 1 */
> +#define CPCAP_REG_USBOTG2 0x0e38 /* USB OTG Control 2 */
> +#define CPCAP_REG_USBOTG3 0x0e3c /* USB OTG Control 3 */
> +#define CPCAP_REG_UIER1 0x0e40 /* USB Interrupt Enable Rising 1 */
> +#define CPCAP_REG_UIER2 0x0e44 /* USB Interrupt Enable Rising 2 */
> +#define CPCAP_REG_UIER3 0x0e48 /* USB Interrupt Enable Rising 3 */
> +#define CPCAP_REG_UIEF1 0x0e4c /* USB Interrupt Enable Falling 1 */
> +#define CPCAP_REG_UIEF2 0x0e50 /* USB Interrupt Enable Falling 1 */
> +#define CPCAP_REG_UIEF3 0x0e54 /* USB Interrupt Enable Falling 1 */
> +#define CPCAP_REG_UIS 0x0e58 /* USB Interrupt Status */
> +#define CPCAP_REG_UIL 0x0e5c /* USB Interrupt Latch */
> +#define CPCAP_REG_USBD 0x0e60 /* USB Debug */
> +#define CPCAP_REG_SCR1 0x0e64 /* Scratch 1 */
> +#define CPCAP_REG_SCR2 0x0e68 /* Scratch 2 */
> +#define CPCAP_REG_SCR3 0x0e6c /* Scratch 3 */
> +
> +#define CPCAP_REG_VMC 0x0eac /* Video Mux Control */
> +#define CPCAP_REG_OWDC 0x0eb0 /* One Wire Device Control */
> +#define CPCAP_REG_GPIO0 0x0eb4 /* GPIO 0 Control */
> +
> +#define CPCAP_REG_GPIO1 0x0ebc /* GPIO 1 Control */
> +
> +#define CPCAP_REG_GPIO2 0x0ec4 /* GPIO 2 Control */
> +
> +#define CPCAP_REG_GPIO3 0x0ecc /* GPIO 3 Control */
> +
> +#define CPCAP_REG_GPIO4 0x0ed4 /* GPIO 4 Control */
> +
> +#define CPCAP_REG_GPIO5 0x0edc /* GPIO 5 Control */
> +
> +#define CPCAP_REG_GPIO6 0x0ee4 /* GPIO 6 Control */
> +
> +#define CPCAP_REG_MDLC 0x1000 /* Main Display Lighting Control */
> +#define CPCAP_REG_KLC 0x1004 /* Keypad Lighting Control */
> +#define CPCAP_REG_ADLC 0x1008 /* Aux Display Lighting Control */
> +#define CPCAP_REG_REDC 0x100c /* Red Triode Control */
> +#define CPCAP_REG_GREENC 0x1010 /* Green Triode Control */
> +#define CPCAP_REG_BLUEC 0x1014 /* Blue Triode Control */
> +#define CPCAP_REG_CFC 0x1018 /* Camera Flash Control */
> +#define CPCAP_REG_ABC 0x101c /* Adaptive Boost Control */
> +#define CPCAP_REG_BLEDC 0x1020 /* Bluetooth LED Control */
> +#define CPCAP_REG_CLEDC 0x1024 /* Camera Privacy LED Control */
> +
> +#define CPCAP_REG_OW1C 0x1200 /* One Wire 1 Command */
> +#define CPCAP_REG_OW1D 0x1204 /* One Wire 1 Data */
> +#define CPCAP_REG_OW1I 0x1208 /* One Wire 1 Interrupt */
> +#define CPCAP_REG_OW1IE 0x120c /* One Wire 1 Interrupt Enable */
> +
> +#define CPCAP_REG_OW1 0x1214 /* One Wire 1 Control */
> +
> +#define CPCAP_REG_OW2C 0x1220 /* One Wire 2 Command */
> +#define CPCAP_REG_OW2D 0x1224 /* One Wire 2 Data */
> +#define CPCAP_REG_OW2I 0x1228 /* One Wire 2 Interrupt */
> +#define CPCAP_REG_OW2IE 0x122c /* One Wire 2 Interrupt Enable */
> +
> +#define CPCAP_REG_OW2 0x1234 /* One Wire 2 Control */
> +
> +#define CPCAP_REG_OW3C 0x1240 /* One Wire 3 Command */
> +#define CPCAP_REG_OW3D 0x1244 /* One Wire 3 Data */
> +#define CPCAP_REG_OW3I 0x1248 /* One Wire 3 Interrupt */
> +#define CPCAP_REG_OW3IE 0x124c /* One Wire 3 Interrupt Enable */
> +
> +#define CPCAP_REG_OW3 0x1254 /* One Wire 3 Control */
> +#define CPCAP_REG_GCAIC 0x1258 /* GCAI Clock Control */
> +#define CPCAP_REG_GCAIM 0x125c /* GCAI GPIO Mode */
> +#define CPCAP_REG_LGDIR 0x1260 /* LMR GCAI GPIO Direction */
> +#define CPCAP_REG_LGPU 0x1264 /* LMR GCAI GPIO Pull-up */
> +#define CPCAP_REG_LGPIN 0x1268 /* LMR GCAI GPIO Pin */
> +#define CPCAP_REG_LGMASK 0x126c /* LMR GCAI GPIO Mask */
> +#define CPCAP_REG_LDEB 0x1270 /* LMR Debounce Settings */
> +#define CPCAP_REG_LGDET 0x1274 /* LMR GCAI Detach Detect */
> +#define CPCAP_REG_LMISC 0x1278 /* LMR Misc Bits */
> +#define CPCAP_REG_LMACE 0x127c /* LMR Mace IC Support */
> +
> +#define CPCAP_REG_TEST 0x7c00 /* Test */
> +
> +#define CPCAP_REG_ST_TEST1 0x7d08 /* ST Test1 */
> +
> +#define CPCAP_REG_ST_TEST2 0x7d18 /* ST Test2 */
> +
> +/*
> + * Helpers for child devices to check the revision and vendor.
> + *
> + * REVISIT: No documentation for the bits below, please update
> + * to use proper names for defines when available.
> + */
> +
> +static inline int cpcap_get_revision(struct device *dev,
> + struct regmap *regmap,
> + u16 *revision)
> +{
> + unsigned int val;
> + int ret;
> +
> + ret = regmap_read(regmap, CPCAP_REG_VERSC1, &val);
> + if (ret) {
> + dev_err(dev, "Could not read revision\n");
> +
> + return ret;
> + }
> +
> + *revision = ((val >> 3) & 0x7) | ((val << 3) & 0x38);
> +
> + return 0;
> +}
> +
> +static inline int cpcap_get_vendor(struct device *dev,
> + struct regmap *regmap,
> + u16 *vendor)
> +{
> + unsigned int val;
> + int ret;
> +
> + ret = regmap_read(regmap, CPCAP_REG_VERSC1, &val);
> + if (ret) {
> + dev_err(dev, "Could not read vendor\n");
> +
> + return ret;
> + }
> +
> + *vendor = (val >> 6) & 0x7;
> +
> + return 0;
> +}
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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