diff options
| -rw-r--r-- | drivers/mfd/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mfd/atmel-hlcdc.c | 122 | ||||
| -rw-r--r-- | include/linux/mfd/atmel-hlcdc.h | 85 |
4 files changed, 214 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index fdbb40181834..bd4a155a9564 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -59,6 +59,12 @@ config MFD_AAT2870_CORE additional drivers must be enabled in order to use the functionality of the device. +config MFD_ATMEL_HLCDC + tristate + select MFD_CORE + select REGMAP_MMIO + depends on OF + config MFD_BCM590XX tristate "Broadcom BCM590xx PMUs" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 10bbd0b9096b..2cd7e743280c 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -157,6 +157,7 @@ obj-$(CONFIG_MFD_SPMI_PMIC) += qcom-spmi-pmic.o obj-$(CONFIG_TPS65911_COMPARATOR) += tps65911-comparator.o obj-$(CONFIG_MFD_TPS65090) += tps65090.o obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o +obj-$(CONFIG_MFD_ATMEL_HLCDC) += atmel-hlcdc.o obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o obj-$(CONFIG_MFD_PALMAS) += palmas.o obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o diff --git a/drivers/mfd/atmel-hlcdc.c b/drivers/mfd/atmel-hlcdc.c new file mode 100644 index 000000000000..cfd58f4cc5c3 --- /dev/null +++ b/drivers/mfd/atmel-hlcdc.c @@ -0,0 +1,122 @@ +/* + * Copyright (C) 2014 Free Electrons + * Copyright (C) 2014 Atmel + * + * Author: Boris BREZILLON <boris.brezillon@free-electrons.com> + * + * 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. + * + * 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/clk.h> +#include <linux/mfd/atmel-hlcdc.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#define ATMEL_HLCDC_REG_MAX (0x4000 - 0x4) + +static const struct mfd_cell atmel_hlcdc_cells[] = { + { + .name = "atmel-hlcdc-pwm", + .of_compatible = "atmel,hlcdc-pwm", + }, + { + .name = "atmel-hlcdc-dc", + .of_compatible = "atmel,hlcdc-display-controller", + }, +}; + +static const struct regmap_config atmel_hlcdc_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = ATMEL_HLCDC_REG_MAX, +}; + +static int atmel_hlcdc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct atmel_hlcdc *hlcdc; + struct resource *res; + void __iomem *regs; + + hlcdc = devm_kzalloc(dev, sizeof(*hlcdc), GFP_KERNEL); + if (!hlcdc) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + regs = devm_ioremap_resource(dev, res); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + hlcdc->irq = platform_get_irq(pdev, 0); + if (hlcdc->irq < 0) + return hlcdc->irq; + + hlcdc->periph_clk = devm_clk_get(dev, "periph_clk"); + if (IS_ERR(hlcdc->periph_clk)) { + dev_err(dev, "failed to get peripheral clock\n"); + return PTR_ERR(hlcdc->periph_clk); + } + + hlcdc->sys_clk = devm_clk_get(dev, "sys_clk"); + if (IS_ERR(hlcdc->sys_clk)) { + dev_err(dev, "failed to get system clock\n"); + return PTR_ERR(hlcdc->sys_clk); + } + + hlcdc->slow_clk = devm_clk_get(dev, "slow_clk"); + if (IS_ERR(hlcdc->slow_clk)) { + dev_err(dev, "failed to get slow clock\n"); + return PTR_ERR(hlcdc->slow_clk); + } + + hlcdc->regmap = devm_regmap_init_mmio(dev, regs, + &atmel_hlcdc_regmap_config); + if (IS_ERR(hlcdc->regmap)) + return PTR_ERR(hlcdc->regmap); + + dev_set_drvdata(dev, hlcdc); + + return mfd_add_devices(dev, -1, atmel_hlcdc_cells, + ARRAY_SIZE(atmel_hlcdc_cells), + NULL, 0, NULL); +} + +static int atmel_hlcdc_remove(struct platform_device *pdev) +{ + mfd_remove_devices(&pdev->dev); + + return 0; +} + +static const struct of_device_id atmel_hlcdc_match[] = { + { .compatible = "atmel,sama5d3-hlcdc" }, + { /* sentinel */ }, +}; + +static struct platform_driver atmel_hlcdc_driver = { + .probe = atmel_hlcdc_probe, + .remove = atmel_hlcdc_remove, + .driver = { + .name = "atmel-hlcdc", + .of_match_table = atmel_hlcdc_match, + }, +}; +module_platform_driver(atmel_hlcdc_driver); + +MODULE_ALIAS("platform:atmel-hlcdc"); +MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>"); +MODULE_DESCRIPTION("Atmel HLCDC driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/atmel-hlcdc.h b/include/linux/mfd/atmel-hlcdc.h new file mode 100644 index 000000000000..1279ab1644b5 --- /dev/null +++ b/include/linux/mfd/atmel-hlcdc.h @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2014 Free Electrons + * Copyright (C) 2014 Atmel + * + * Author: Boris BREZILLON <boris.brezillon@free-electrons.com> + * + * 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. + * + * 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __LINUX_MFD_HLCDC_H +#define __LINUX_MFD_HLCDC_H + +#include <linux/clk.h> +#include <linux/regmap.h> + +#define ATMEL_HLCDC_CFG(i) ((i) * 0x4) +#define ATMEL_HLCDC_SIG_CFG LCDCFG(5) +#define ATMEL_HLCDC_HSPOL BIT(0) +#define ATMEL_HLCDC_VSPOL BIT(1) +#define ATMEL_HLCDC_VSPDLYS BIT(2) +#define ATMEL_HLCDC_VSPDLYE BIT(3) +#define ATMEL_HLCDC_DISPPOL BIT(4) +#define ATMEL_HLCDC_DITHER BIT(6) +#define ATMEL_HLCDC_DISPDLY BIT(7) +#define ATMEL_HLCDC_MODE_MASK GENMASK(9, 8) +#define ATMEL_HLCDC_PP BIT(10) +#define ATMEL_HLCDC_VSPSU BIT(12) +#define ATMEL_HLCDC_VSPHO BIT(13) +#define ATMEL_HLCDC_GUARDTIME_MASK GENMASK(20, 16) + +#define ATMEL_HLCDC_EN 0x20 +#define ATMEL_HLCDC_DIS 0x24 +#define ATMEL_HLCDC_SR 0x28 +#define ATMEL_HLCDC_IER 0x2c +#define ATMEL_HLCDC_IDR 0x30 +#define ATMEL_HLCDC_IMR 0x34 +#define ATMEL_HLCDC_ISR 0x38 + +#define ATMEL_HLCDC_CLKPOL BIT(0) +#define ATMEL_HLCDC_CLKSEL BIT(2) +#define ATMEL_HLCDC_CLKPWMSEL BIT(3) +#define ATMEL_HLCDC_CGDIS(i) BIT(8 + (i)) +#define ATMEL_HLCDC_CLKDIV_SHFT 16 +#define ATMEL_HLCDC_CLKDIV_MASK GENMASK(23, 16) +#define ATMEL_HLCDC_CLKDIV(div) ((div - 2) << ATMEL_HLCDC_CLKDIV_SHFT) + +#define ATMEL_HLCDC_PIXEL_CLK BIT(0) +#define ATMEL_HLCDC_SYNC BIT(1) +#define ATMEL_HLCDC_DISP BIT(2) +#define ATMEL_HLCDC_PWM BIT(3) +#define ATMEL_HLCDC_SIP BIT(4) + +#define ATMEL_HLCDC_SOF BIT(0) +#define ATMEL_HLCDC_SYNCDIS BIT(1) +#define ATMEL_HLCDC_FIFOERR BIT(4) +#define ATMEL_HLCDC_LAYER_STATUS(x) BIT((x) + 8) + +/** + * Structure shared by the MFD device and its subdevices. + * + * @regmap: register map used to access HLCDC IP registers + * @periph_clk: the hlcdc peripheral clock + * @sys_clk: the hlcdc system clock + * @slow_clk: the system slow clk + * @irq: the hlcdc irq + */ +struct atmel_hlcdc { + struct regmap *regmap; + struct clk *periph_clk; + struct clk *sys_clk; + struct clk *slow_clk; + int irq; +}; + +#endif /* __LINUX_MFD_HLCDC_H */ |