dm: sf: Add a uclass for SPI flash
Add a driver model uclass for SPI flash which supports the common
operations (read, write, erase). Since we must keep support for the
non-dm interface, some modification of the spi_flash header is required.
CONFIG_DM_SPI_FLASH is used to enable driver model for SPI flash.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index 9e18fb4..15789a0 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -5,13 +5,18 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-$(CONFIG_DM_SPI_FLASH) += sf-uclass.o
+
ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_SPL_SPI_LOAD) += spi_spl_load.o
obj-$(CONFIG_SPL_SPI_BOOT) += fsl_espi_spl.o
endif
+#ifndef CONFIG_DM_SPI
+obj-$(CONFIG_SPI_FLASH) += sf_probe.o
+#endif
obj-$(CONFIG_CMD_SF) += sf.o
-obj-$(CONFIG_SPI_FLASH) += sf_params.o sf_probe.o sf_ops.o
+obj-$(CONFIG_SPI_FLASH) += sf_ops.o sf_params.o
obj-$(CONFIG_SPI_FRAM_RAMTRON) += ramtron.o
obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o
obj-$(CONFIG_SPI_M95XXX) += eeprom_m95xxx.o
diff --git a/drivers/mtd/spi/sf-uclass.c b/drivers/mtd/spi/sf-uclass.c
new file mode 100644
index 0000000..376d815
--- /dev/null
+++ b/drivers/mtd/spi/sf-uclass.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <spi.h>
+#include <spi_flash.h>
+#include <dm/device-internal.h>
+#include "sf_internal.h"
+
+/*
+ * TODO(sjg@chromium.org): This is an old-style function. We should remove
+ * it when all SPI flash drivers use dm
+ */
+struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int spi_mode)
+{
+ struct udevice *dev;
+
+ if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
+ return NULL;
+
+ return dev->uclass_priv;
+}
+
+void spi_flash_free(struct spi_flash *flash)
+{
+ spi_flash_remove(flash->spi->dev);
+}
+
+int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
+ unsigned int max_hz, unsigned int spi_mode,
+ struct udevice **devp)
+{
+ struct spi_slave *slave;
+ struct udevice *bus;
+ char name[20], *str;
+ int ret;
+
+ snprintf(name, sizeof(name), "%d:%d", busnum, cs);
+ str = strdup(name);
+ ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
+ "spi_flash_std", str, &bus, &slave);
+ if (ret)
+ return ret;
+
+ *devp = slave->dev;
+ return 0;
+}
+
+int spi_flash_remove(struct udevice *dev)
+{
+ return device_remove(dev);
+}
+
+UCLASS_DRIVER(spi_flash) = {
+ .id = UCLASS_SPI_FLASH,
+ .name = "spi_flash",
+ .per_device_auto_alloc_size = sizeof(struct spi_flash),
+};