dm: exynos: cros_ec: Move cros_ec_spi to driver model

[karo-tx-uboot.git] / drivers / misc / cros_ec_spi.c

diff --git a/drivers/misc/cros_ec_spi.c b/drivers/misc/cros_ec_spi.c
index 015333f139a209fd686a4ac173aba02baeeb1b33..e403664bb561755184c60e9020e028b84169d40f 100644 (file)
--- a/drivers/misc/cros_ec_spi.c
+++ b/drivers/misc/cros_ec_spi.c
@@ -15,23 +15,34 @@
 
 #include <common.h>
 #include <cros_ec.h>
+#include <dm.h>
+#include <errno.h>
 #include <spi.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_DM_CROS_EC
+int cros_ec_spi_packet(struct udevice *udev, int out_bytes, int in_bytes)
+{
+       struct cros_ec_dev *dev = udev->uclass_priv;
+#else
 int cros_ec_spi_packet(struct cros_ec_dev *dev, int out_bytes, int in_bytes)
 {
+#endif
+       struct spi_slave *slave = dev_get_parentdata(dev->dev);
        int rv;
 
        /* Do the transfer */
-       if (spi_claim_bus(dev->spi)) {
+       if (spi_claim_bus(slave)) {
                debug("%s: Cannot claim SPI bus\n", __func__);
                return -1;
        }
 
-       rv = spi_xfer(dev->spi, max(out_bytes, in_bytes) * 8,
+       rv = spi_xfer(slave, max(out_bytes, in_bytes) * 8,
                      dev->dout, dev->din,
                      SPI_XFER_BEGIN | SPI_XFER_END);
 
-       spi_release_bus(dev->spi);
+       spi_release_bus(slave);
 
        if (rv) {
                debug("%s: Cannot complete SPI transfer\n", __func__);
@@ -56,10 +67,19 @@ int cros_ec_spi_packet(struct cros_ec_dev *dev, int out_bytes, int in_bytes)
  * @param din_len      Maximum size of response in bytes
  * @return number of bytes in response, or -1 on error
  */
+#ifdef CONFIG_DM_CROS_EC
+int cros_ec_spi_command(struct udevice *udev, uint8_t cmd, int cmd_version,
+                    const uint8_t *dout, int dout_len,
+                    uint8_t **dinp, int din_len)
+{
+       struct cros_ec_dev *dev = udev->uclass_priv;
+#else
 int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
                     const uint8_t *dout, int dout_len,
                     uint8_t **dinp, int din_len)
 {
+#endif
+       struct spi_slave *slave = dev_get_parentdata(dev->dev);
        int in_bytes = din_len + 4;     /* status, length, checksum, trailer */
        uint8_t *out;
        uint8_t *p;
@@ -92,7 +112,7 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
         */
        memset(dev->din, '\0', in_bytes);
 
-       if (spi_claim_bus(dev->spi)) {
+       if (spi_claim_bus(slave)) {
                debug("%s: Cannot claim SPI bus\n", __func__);
                return -1;
        }
@@ -113,10 +133,10 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
        p = dev->din + sizeof(int64_t) - 2;
        len = dout_len + 4;
        cros_ec_dump_data("out", cmd, out, len);
-       rv = spi_xfer(dev->spi, max(len, in_bytes) * 8, out, p,
+       rv = spi_xfer(slave, max(len, in_bytes) * 8, out, p,
                      SPI_XFER_BEGIN | SPI_XFER_END);
 
-       spi_release_bus(dev->spi);
+       spi_release_bus(slave);
 
        if (rv) {
                debug("%s: Cannot complete SPI transfer\n", __func__);
@@ -146,6 +166,7 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
        return len;
 }
 
+#ifndef CONFIG_DM_CROS_EC
 int cros_ec_spi_decode_fdt(struct cros_ec_dev *dev, const void *blob)
 {
        /* Decode interface-specific FDT params */
@@ -165,11 +186,59 @@ int cros_ec_spi_decode_fdt(struct cros_ec_dev *dev, const void *blob)
  */
 int cros_ec_spi_init(struct cros_ec_dev *dev, const void *blob)
 {
-       dev->spi = spi_setup_slave_fdt(blob, dev->node, dev->parent_node);
-       if (!dev->spi) {
+       int ret;
+
+       ret = spi_setup_slave_fdt(blob, dev->node, dev->parent_node,
+                                 &slave);
+       if (ret) {
                debug("%s: Could not setup SPI slave\n", __func__);
-               return -1;
+               return ret;
        }
 
        return 0;
 }
+#endif
+
+#ifdef CONFIG_DM_CROS_EC
+int cros_ec_probe(struct udevice *dev)
+{
+       struct spi_slave *slave = dev_get_parentdata(dev);
+       int ret;
+
+       /*
+        * TODO(sjg@chromium.org)
+        *
+        * This is really horrible at present. It is an artifact of removing
+        * the child_pre_probe() method for SPI. Everything here could go in
+        * an automatic function, except that spi_get_bus_and_cs() wants to
+        * set it up manually and call device_probe_child().
+        *
+        * The solution may be to re-enable the child_pre_probe() method for
+        * SPI and have it do nothing if the child is already passed in via
+        * device_probe_child().
+        */
+       slave->dev = dev;
+       ret = spi_ofdata_to_platdata(gd->fdt_blob, dev->of_offset, slave);
+       if (ret)
+               return ret;
+       return cros_ec_register(dev);
+}
+
+struct dm_cros_ec_ops cros_ec_ops = {
+       .packet = cros_ec_spi_packet,
+       .command = cros_ec_spi_command,
+};
+
+static const struct udevice_id cros_ec_ids[] = {
+       { .compatible = "google,cros-ec" },
+       { }
+};
+
+U_BOOT_DRIVER(cros_ec_spi) = {
+       .name           = "cros_ec",
+       .id             = UCLASS_CROS_EC,
+       .of_match       = cros_ec_ids,
+       .probe          = cros_ec_probe,
+       .ops            = &cros_ec_ops,
+};
+#endif