diff options
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mfd/sun6i-prcm.c | 134 |
3 files changed, 143 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index c681741ce492..e56fb3749bca 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -732,6 +732,14 @@ config MFD_STA2X11 select MFD_CORE select REGMAP_MMIO +config MFD_SUN6I_PRCM + bool "Allwinner A31 PRCM controller" + depends on ARCH_SUNXI + select MFD_CORE + help + Support for the PRCM (Power/Reset/Clock Management) unit available + in A31 SoC. + config MFD_SYSCON bool "System Controller Register R/W Based on Regmap" select REGMAP_MMIO diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 1efecf2793ae..df7823cae5af 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_MFD_STA2X11) += sta2x11-mfd.o obj-$(CONFIG_MFD_STMPE) += stmpe.o obj-$(CONFIG_STMPE_I2C) += stmpe-i2c.o obj-$(CONFIG_STMPE_SPI) += stmpe-spi.o +obj-$(CONFIG_MFD_SUN6I_PRCM) += sun6i-prcm.o obj-$(CONFIG_MFD_TC3589X) += tc3589x.o obj-$(CONFIG_MFD_T7L66XB) += t7l66xb.o tmio_core.o obj-$(CONFIG_MFD_TC6387XB) += tc6387xb.o tmio_core.o diff --git a/drivers/mfd/sun6i-prcm.c b/drivers/mfd/sun6i-prcm.c new file mode 100644 index 000000000000..718fc4d2adc0 --- /dev/null +++ b/drivers/mfd/sun6i-prcm.c @@ -0,0 +1,134 @@ +/* + * Copyright (C) 2014 Free Electrons + * + * License Terms: GNU General Public License v2 + * Author: Boris BREZILLON <boris.brezillon@free-electrons.com> + * + * Allwinner PRCM (Power/Reset/Clock Management) driver + * + */ + +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/of.h> + +struct prcm_data { + int nsubdevs; + const struct mfd_cell *subdevs; +}; + +static const struct resource sun6i_a31_ar100_clk_res[] = { + { + .start = 0x0, + .end = 0x3, + .flags = IORESOURCE_MEM, + }, +}; + +static const struct resource sun6i_a31_apb0_clk_res[] = { + { + .start = 0xc, + .end = 0xf, + .flags = IORESOURCE_MEM, + }, +}; + +static const struct resource sun6i_a31_apb0_gates_clk_res[] = { + { + .start = 0x28, + .end = 0x2b, + .flags = IORESOURCE_MEM, + }, +}; + +static const struct resource sun6i_a31_apb0_rstc_res[] = { + { + .start = 0xb0, + .end = 0xb3, + .flags = IORESOURCE_MEM, + }, +}; + +static const struct mfd_cell sun6i_a31_prcm_subdevs[] = { + { + .name = "sun6i-a31-ar100-clk", + .of_compatible = "allwinner,sun6i-a31-ar100-clk", + .num_resources = ARRAY_SIZE(sun6i_a31_ar100_clk_res), + .resources = sun6i_a31_ar100_clk_res, + }, + { + .name = "sun6i-a31-apb0-clk", + .of_compatible = "allwinner,sun6i-a31-apb0-clk", + .num_resources = ARRAY_SIZE(sun6i_a31_apb0_clk_res), + .resources = sun6i_a31_apb0_clk_res, + }, + { + .name = "sun6i-a31-apb0-gates-clk", + .of_compatible = "allwinner,sun6i-a31-apb0-gates-clk", + .num_resources = ARRAY_SIZE(sun6i_a31_apb0_gates_clk_res), + .resources = sun6i_a31_apb0_gates_clk_res, + }, + { + .name = "sun6i-a31-apb0-clock-reset", + .of_compatible = "allwinner,sun6i-a31-clock-reset", + .num_resources = ARRAY_SIZE(sun6i_a31_apb0_rstc_res), + .resources = sun6i_a31_apb0_rstc_res, + }, +}; + +static const struct prcm_data sun6i_a31_prcm_data = { + .nsubdevs = ARRAY_SIZE(sun6i_a31_prcm_subdevs), + .subdevs = sun6i_a31_prcm_subdevs, +}; + +static const struct of_device_id sun6i_prcm_dt_ids[] = { + { + .compatible = "allwinner,sun6i-a31-prcm", + .data = &sun6i_a31_prcm_data, + }, + { /* sentinel */ }, +}; + +static int sun6i_prcm_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + const struct of_device_id *match; + const struct prcm_data *data; + struct resource *res; + int ret; + + match = of_match_node(sun6i_prcm_dt_ids, np); + if (!match) + return -EINVAL; + + data = match->data; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no prcm memory region provided\n"); + return -ENOENT; + } + + ret = mfd_add_devices(&pdev->dev, 0, data->subdevs, data->nsubdevs, + res, -1, NULL); + if (ret) { + dev_err(&pdev->dev, "failed to add subdevices\n"); + return ret; + } + + return 0; +} + +static struct platform_driver sun6i_prcm_driver = { + .driver = { + .name = "sun6i-prcm", + .owner = THIS_MODULE, + .of_match_table = sun6i_prcm_dt_ids, + }, + .probe = sun6i_prcm_probe, +}; +module_platform_driver(sun6i_prcm_driver); + +MODULE_AUTHOR("Boris BREZILLON <boris.brezillon@free-electrons.com>"); +MODULE_DESCRIPTION("Allwinner sun6i PRCM driver"); +MODULE_LICENSE("GPL v2"); |