mmc: dw_mmc: add common capabilities to replace caps

The caps field depends on the mshcN alias ID but for some devices this
is unnecessary as the capabilities are the same for all instances
sharing the same compatible.

Add a common_caps field for this case which updates the host's
capabilities without needing the mshcN alias ID.

Signed-off-by: John Keeping <john@metanate.com>
Tested-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/20211124184603.3897245-2-john@metanate.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 195f2b2434b0ee6fdb7cd1a805e760171359df77..f2a14a434bef103ae0c6d6329e44775cf65fc4c7 100644 (file)
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2856,6 +2856,9 @@ static int dw_mci_init_slot_caps(struct dw_mci_slot *slot)
        if (host->pdata->pm_caps)
                mmc->pm_caps = host->pdata->pm_caps;
 
+       if (drv_data)
+               mmc->caps |= drv_data->common_caps;
+
        if (host->dev->of_node) {
                ctrl_id = of_alias_get_id(host->dev->of_node, "mshc");
                if (ctrl_id < 0)

diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index ce05d81477d9cd9dbed1aa8086d204716583b4a3..771d5afa3136ac5587fd8aff9d8c74afa02e58bf 100644 (file)
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -550,6 +550,8 @@ struct dw_mci_slot {
  * dw_mci driver data - dw-mshc implementation specific driver data.
  * @caps: mmc subsystem specified capabilities of the controller(s).
  * @num_caps: number of capabilities specified by @caps.
+ * @common_caps: mmc subsystem specified capabilities applicable to all of
+ *     the controllers
  * @init: early implementation specific initialization.
  * @set_ios: handle bus specific extensions.
  * @parse_dt: parse implementation specific device tree properties.
@@ -562,6 +564,7 @@ struct dw_mci_slot {
 struct dw_mci_drv_data {
        unsigned long   *caps;
        u32             num_caps;
+       u32             common_caps;
        int             (*init)(struct dw_mci *host);
        void            (*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
        int             (*parse_dt)(struct dw_mci *host);