10  * SPDX-License-Identifier:	GPL-2.0+
19 #include <asm/gpio.h>
26 	struct gpio_desc mosi;  member
44 	dm_gpio_set_value(&plat->sclk, bit);  in soft_spi_scl()
54 	dm_gpio_set_value(&plat->mosi, bit);  in soft_spi_sda()
64 	dm_gpio_set_value(&plat->cs, 0);  in soft_spi_cs_activate()
65 	dm_gpio_set_value(&plat->sclk, 0);  in soft_spi_cs_activate()
66 	dm_gpio_set_value(&plat->cs, 1);  in soft_spi_cs_activate()
76 	dm_gpio_set_value(&plat->cs, 0);  in soft_spi_cs_deactivate()
96 /*-----------------------------------------------------------------------
99  * This writes "bitlen" bits out the SPI MOSI port and simultaneously clocks
118 	int		cpha = priv->mode & SPI_CPHA;  in soft_spi_xfer()
122 	      dev->parent->name, dev->name, *(uint *)txd, *(uint *)rxd,  in soft_spi_xfer()
146 		if ((plat->flags & SPI_MASTER_NO_TX) == 0)  in soft_spi_xfer()
148 		udelay(plat->spi_delay_us);  in soft_spi_xfer()
154 		if ((plat->flags & SPI_MASTER_NO_RX) == 0)  in soft_spi_xfer()
155 			tmpdin	|= dm_gpio_get_value(&plat->miso);  in soft_spi_xfer()
157 		udelay(plat->spi_delay_us);  in soft_spi_xfer()
163 	 * bits over to left-justify them.  Then store the last byte  in soft_spi_xfer()
168 			tmpdin <<= 8 - (bitlen % 8);  in soft_spi_xfer()
188 	priv->mode = mode;  in soft_spi_set_mode()
203 	struct soft_spi_platdata *plat = dev->platdata;  in soft_spi_ofdata_to_platdata()
205 	plat->spi_delay_us = dev_read_u32_default(dev, "spi-delay-us", 0);  in soft_spi_ofdata_to_platdata()
213 	struct soft_spi_platdata *plat = dev->platdata;  in soft_spi_probe()
218 		cs_flags = (slave->mode & SPI_CS_HIGH) ? 0 : GPIOD_ACTIVE_LOW;  in soft_spi_probe()
219 		clk_flags = (slave->mode & SPI_CPOL) ? GPIOD_ACTIVE_LOW : 0;  in soft_spi_probe()
225 	if (gpio_request_by_name(dev, "cs-gpios", 0, &plat->cs, GPIOD_IS_OUT | cs_flags) ||  in soft_spi_probe()
226 	    (gpio_request_by_name(dev, "gpio-sck", 0, &plat->sclk, GPIOD_IS_OUT | clk_flags) &&  in soft_spi_probe()
227 	     gpio_request_by_name(dev, "sck-gpios", 0, &plat->sclk, GPIOD_IS_OUT | clk_flags)))  in soft_spi_probe()
228 		return -EINVAL;  in soft_spi_probe()
230 	ret = gpio_request_by_name(dev, "gpio-mosi", 0, &plat->mosi,  in soft_spi_probe()
233 		if (gpio_request_by_name(dev, "mosi-gpios", 0, &plat->mosi,  in soft_spi_probe()
235 			plat->flags |= SPI_MASTER_NO_TX;  in soft_spi_probe()
238 	ret = gpio_request_by_name(dev, "gpio-miso", 0, &plat->miso,  in soft_spi_probe()
241 		if (gpio_request_by_name(dev, "miso-gpios", 0, &plat->miso,  in soft_spi_probe()
243 			plat->flags |= SPI_MASTER_NO_RX;  in soft_spi_probe()
246 	if ((plat->flags & (SPI_MASTER_NO_RX | SPI_MASTER_NO_TX)) ==  in soft_spi_probe()
248 		return -EINVAL;  in soft_spi_probe()
254 	{ .compatible = "spi-gpio" },