mmc: Split mmc struct, rework mmc initialization (v2)

The way that struct mmc was implemented was a bit of a mess;
configuration and internal state all jumbled up in a single structure.

On top of that the way initialization is done with mmc_register leads
to a lot of duplicated code in drivers.

Typically the initialization got something like this in every driver.

	struct mmc *mmc = malloc(sizeof(struct mmc));
	memset(mmc, 0, sizeof(struct mmc);
	/* fill in fields of mmc struct */
	/* store private data pointer */
	mmc_register(mmc);

By using the new mmc_create call one just passes an mmc config struct
and an optional private data pointer like this:

	struct mmc = mmc_create(&cfg, priv);

All in tree drivers have been updated to the new form, and expect
mmc_register to go away before long.

Changes since v1:

* Use calloc instead of manually calling memset.
* Mark mmc_register as deprecated.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/dwmmc.h b/include/dwmmc.h
index b64155851d..c9bdf51a67 100644
--- a/include/dwmmc.h
+++ b/include/dwmmc.h
@@ -143,6 +143,8 @@ struct dwmci_host {
 	void (*clksel)(struct dwmci_host *host);
 	void (*board_init)(struct dwmci_host *host);
 	unsigned int (*get_mmc_clk)(struct dwmci_host *host);
+
+	struct mmc_config cfg;
 };
 
 struct dwmci_idmac {