diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/hsdk-creg-gpio.c | 110 |
3 files changed, 118 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 6240c39539..2acb33bb51 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -80,6 +80,13 @@ config IMX_RGPIO2P help This driver supports i.MX7ULP Rapid GPIO2P controller. +config HSDK_CREG_GPIO + bool "HSDK CREG GPIO griver" + depends on DM + default n + help + This driver supports CREG GPIOs on Synopsys HSDK SOC. + config LPC32XX_GPIO bool "LPC32XX GPIO driver" depends on DM diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 81f55a576b..201d7bfff9 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_GPIO_UNIPHIER) += gpio-uniphier.o obj-$(CONFIG_ZYNQ_GPIO) += zynq_gpio.o obj-$(CONFIG_VYBRID_GPIO) += vybrid_gpio.o obj-$(CONFIG_HIKEY_GPIO) += hi6220_gpio.o +obj-$(CONFIG_HSDK_CREG_GPIO) += hsdk-creg-gpio.o obj-$(CONFIG_IMX_RGPIO2P) += imx_rgpio2p.o obj-$(CONFIG_PIC32_GPIO) += pic32_gpio.o obj-$(CONFIG_MVEBU_GPIO) += mvebu_gpio.o diff --git a/drivers/gpio/hsdk-creg-gpio.c b/drivers/gpio/hsdk-creg-gpio.c new file mode 100644 index 0000000000..8ca807a18f --- /dev/null +++ b/drivers/gpio/hsdk-creg-gpio.c @@ -0,0 +1,110 @@ +/* + * Synopsys HSDK SDP Generic PLL clock driver + * + * Copyright (C) 2017 Synopsys + * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <asm-generic/gpio.h> +#include <asm/io.h> +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <linux/printk.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define HSDK_CREG_MAX_GPIO 8 + +#define GPIO_ACTIVATE 0x2 +#define GPIO_DEACTIVATE 0x3 +#define GPIO_PIN_MASK 0x3 +#define BIT_PER_GPIO 2 + +struct hsdk_creg_gpio { + uint32_t *regs; +}; + +static int hsdk_creg_gpio_set_value(struct udevice *dev, unsigned oft, int val) +{ + struct hsdk_creg_gpio *hcg = dev_get_priv(dev); + uint32_t reg = readl(hcg->regs); + uint32_t cmd = val ? GPIO_DEACTIVATE : GPIO_ACTIVATE; + + reg &= ~(GPIO_PIN_MASK << (oft * BIT_PER_GPIO)); + reg |= (cmd << (oft * BIT_PER_GPIO)); + + writel(reg, hcg->regs); + + return 0; +} + +static int hsdk_creg_gpio_direction_output(struct udevice *dev, unsigned oft, + int val) +{ + hsdk_creg_gpio_set_value(dev, oft, val); + + return 0; +} + +static int hsdk_creg_gpio_direction_input(struct udevice *dev, unsigned oft) +{ + pr_err("hsdk-creg-gpio can't be used as input!\n"); + + return -ENOTSUPP; +} + +static int hsdk_creg_gpio_get_value(struct udevice *dev, unsigned int oft) +{ + struct hsdk_creg_gpio *hcg = dev_get_priv(dev); + uint32_t val = readl(hcg->regs); + + val = (val >> (oft * BIT_PER_GPIO)) & GPIO_PIN_MASK; + return (val == GPIO_DEACTIVATE) ? 1 : 0; +} + +static const struct dm_gpio_ops hsdk_creg_gpio_ops = { + .direction_output = hsdk_creg_gpio_direction_output, + .direction_input = hsdk_creg_gpio_direction_input, + .set_value = hsdk_creg_gpio_set_value, + .get_value = hsdk_creg_gpio_get_value, +}; + +static int hsdk_creg_gpio_probe(struct udevice *dev) +{ + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + struct hsdk_creg_gpio *hcg = dev_get_priv(dev); + + hcg->regs = (uint32_t *)devfdt_get_addr_ptr(dev); + + uc_priv->gpio_count = dev_read_u32_default(dev, "gpio-count", 1); + if (uc_priv->gpio_count > HSDK_CREG_MAX_GPIO) + uc_priv->gpio_count = HSDK_CREG_MAX_GPIO; + + uc_priv->bank_name = dev_read_string(dev, "gpio-bank-name"); + if (!uc_priv->bank_name) + uc_priv->bank_name = dev_read_name(dev); + + pr_debug("%s GPIO [0x%p] controller with %d gpios probed\n", + uc_priv->bank_name, hcg->regs, uc_priv->gpio_count); + + return 0; +} + +static const struct udevice_id hsdk_creg_gpio_ids[] = { + { .compatible = "snps,hsdk-creg-gpio" }, + { } +}; + +U_BOOT_DRIVER(gpio_hsdk_creg) = { + .name = "gpio_hsdk_creg", + .id = UCLASS_GPIO, + .ops = &hsdk_creg_gpio_ops, + .probe = hsdk_creg_gpio_probe, + .of_match = hsdk_creg_gpio_ids, + .platdata_auto_alloc_size = sizeof(struct hsdk_creg_gpio), +}; |