diff options
Diffstat (limited to 'drivers/gpio/gpio-mscc-bitbang-spi.c')
-rw-r--r-- | drivers/gpio/gpio-mscc-bitbang-spi.c | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/drivers/gpio/gpio-mscc-bitbang-spi.c b/drivers/gpio/gpio-mscc-bitbang-spi.c deleted file mode 100644 index b675f9052c..0000000000 --- a/drivers/gpio/gpio-mscc-bitbang-spi.c +++ /dev/null @@ -1,122 +0,0 @@ -// SPDX-License-Identifier: (GPL-2.0 OR MIT) -/* - * Microsemi SoCs pinctrl driver - * - * Author: <gregory.clement@bootlin.com> - * License: Dual MIT/GPL - * Copyright (c) 2018 Microsemi Corporation - */ - -#include <common.h> -#include <asm-generic/gpio.h> -#include <asm/io.h> -#include <dm.h> -#include <errno.h> - -enum { - SDI, - CS0, - CS1, - CS2, - CS3, - SDO, - SCK -}; - -static const int pinmap[] = { 0, 5, 6, 7, 8, 10, 12 }; - -#define SW_SPI_CSn_OE 0x1E /* bits 1 to 4 */ -#define SW_SPI_CS0_OE BIT(1) -#define SW_SPI_SDO_OE BIT(9) -#define SW_SPI_SCK_OE BIT(11) -#define SW_PIN_CTRL_MODE BIT(13) - -struct mscc_bb_spi_gpio { - void __iomem *regs; - u32 cache_val; -}; - -static int mscc_bb_spi_gpio_set(struct udevice *dev, unsigned oft, int val) -{ - struct mscc_bb_spi_gpio *gpio = dev_get_priv(dev); - - if (val) - gpio->cache_val |= BIT(pinmap[oft]); - else - gpio->cache_val &= ~BIT(pinmap[oft]); - - writel(gpio->cache_val, gpio->regs); - - return 0; -} - -static int mscc_bb_spi_gpio_direction_output(struct udevice *dev, unsigned oft, - int val) -{ - if (oft == 0) { - pr_err("SW_SPI_DSI can't be used as output\n"); - return -ENOTSUPP; - } - - mscc_bb_spi_gpio_set(dev, oft, val); - - return 0; -} - -static int mscc_bb_spi_gpio_direction_input(struct udevice *dev, unsigned oft) -{ - return 0; -} - -static int mscc_bb_spi_gpio_get(struct udevice *dev, unsigned int oft) -{ - struct mscc_bb_spi_gpio *gpio = dev_get_priv(dev); - u32 val = readl(gpio->regs); - - return !!(val & BIT(pinmap[oft])); -} - -static const struct dm_gpio_ops mscc_bb_spi_gpio_ops = { - .direction_output = mscc_bb_spi_gpio_direction_output, - .direction_input = mscc_bb_spi_gpio_direction_input, - .set_value = mscc_bb_spi_gpio_set, - .get_value = mscc_bb_spi_gpio_get, -}; - -static int mscc_bb_spi_gpio_probe(struct udevice *dev) -{ - struct mscc_bb_spi_gpio *gpio = dev_get_priv(dev); - struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); - - gpio->regs = dev_remap_addr(dev); - if (!gpio->regs) - return -EINVAL; - - uc_priv->bank_name = dev->name; - uc_priv->gpio_count = ARRAY_SIZE(pinmap); - /* - * Enable software mode to control the SPI pin, enables the - * output mode for most of the pin and initialize the cache - * value in the same time - */ - - gpio->cache_val = SW_PIN_CTRL_MODE | SW_SPI_SCK_OE | SW_SPI_SDO_OE | - SW_SPI_CS0_OE; - writel(gpio->cache_val, gpio->regs); - - return 0; -} - -static const struct udevice_id mscc_bb_spi_gpio_ids[] = { - {.compatible = "mscc,spi-bitbang-gpio"}, - {} -}; - -U_BOOT_DRIVER(gpio_mscc_bb_spi) = { - .name = "gpio-mscc-spi-bitbang", - .id = UCLASS_GPIO, - .ops = &mscc_bb_spi_gpio_ops, - .probe = mscc_bb_spi_gpio_probe, - .of_match = of_match_ptr(mscc_bb_spi_gpio_ids), - .priv_auto_alloc_size = sizeof(struct mscc_bb_spi_gpio), -}; |