The dw i3c core can be integrated into various SoC devices. Platforms
that use this core may need a little configuration that is specific to
that platform.
Add a little infrastructure to allow platform-specific behaviour: a bit
of data on struct dw_i3c_master, and two hooks to the probe and init
calls to enable this.
A future change will add new platform support that uses these hooks.
Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxxxxxxxxxxxx>
---
drivers/i3c/master/dw-i3c-master.c | 42 +++++++++++++++++++++++++-----
1 file changed, 36 insertions(+), 6 deletions(-)
diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index d73d57362b3b..49b891449222 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -241,6 +241,17 @@ struct dw_i3c_master {
char version[5];
char type[5];
u8 addrs[MAX_DEVS];
+
+ /* platform-specific data */
+ const struct dw_i3c_platform_ops *platform_ops;
+ union {
+ } pdata;
+
+};
+
+struct dw_i3c_platform_ops {
+ int (*probe)(struct dw_i3c_master *i3c, struct platform_device *pdev);
+ int (*init)(struct dw_i3c_master *i3c);
};
struct dw_i3c_i2c_dev_data {
@@ -612,6 +623,12 @@ static int dw_i3c_master_bus_init(struct i3c_master_controller *m)
u32 thld_ctrl;
int ret;
+ if (master->platform_ops && master->platform_ops->init) {
+ ret = master->platform_ops->init(master);
+ if (ret)
+ return ret;
+ }
+
switch (bus->mode) {
case I3C_BUS_MODE_MIXED_FAST:
case I3C_BUS_MODE_MIXED_LIMITED:
@@ -1128,8 +1145,15 @@ static const struct i3c_master_controller_ops dw_mipi_i3c_ops = {
.i2c_xfers = dw_i3c_master_i2c_xfers,
};
+static const struct of_device_id dw_i3c_master_of_match[] = {
+ { .compatible = "snps,dw-i3c-master-1.00a", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, dw_i3c_master_of_match);
+
static int dw_i3c_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
struct dw_i3c_master *master;
int ret, irq;
@@ -1181,6 +1205,18 @@ static int dw_i3c_probe(struct platform_device *pdev)
master->maxdevs = ret >> 16;
master->free_pos = GENMASK(master->maxdevs - 1, 0);
+ /* match any platform-specific ops */
+ match = of_match_node(dw_i3c_master_of_match, pdev->dev.of_node);
+ if (match && match->data)
+ master->platform_ops = match->data;
+
+ /* platform-specific probe */
+ if (master->platform_ops && master->platform_ops->probe) {
+ ret = master->platform_ops->probe(master, pdev);
+ if (ret)
+ goto err_assert_rst;
+ }
+
ret = i3c_master_register(&master->base, &pdev->dev,
&dw_mipi_i3c_ops, false);
if (ret)
@@ -1213,12 +1249,6 @@ static int dw_i3c_remove(struct platform_device *pdev)
return 0;
}
-static const struct of_device_id dw_i3c_master_of_match[] = {
- { .compatible = "snps,dw-i3c-master-1.00a", },
- {},
-};
-MODULE_DEVICE_TABLE(of, dw_i3c_master_of_match);
-
static struct platform_driver dw_i3c_driver = {
.probe = dw_i3c_probe,
.remove = dw_i3c_remove,
--
2.39.1
