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Commit 6d1514aa authored by Bhalchandra Gajare's avatar Bhalchandra Gajare Committed by Gerrit - the friendly Code Review server
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mfd: wcd9xxx-core: Add API to support slimbus clock bandwidth request 



Slimbus clock can be scaled for high bandwidth requirements, add API to
support voting for slimbus clock so that individual codec drivers can
use this API.

CRs-fixed: 735296
Change-Id: I5be78b9ce5d0e2b241cecdba5f7ee672d8211461
Signed-off-by: default avatarBhalchandra Gajare <gajare@codeaurora.org>
parent 686f7d86

drivers/mfd/wcd9xxx-core.c

+21 −0
Original line number Diff line number Diff line
@@ -373,6 +373,27 @@ int wcd9xxx_slim_write_repeat(struct wcd9xxx *wcd9xxx, unsigned short reg, 
}

EXPORT_SYMBOL(wcd9xxx_slim_write_repeat);



/*

 * wcd9xxx_slim_reserve_bw: API to reserve the slimbus bandwidth

 * @wcd9xxx: Handle to the wcd9xxx core

 * @bw_ops: value of the bandwidth that is requested

 * @commit: Flag to indicate if bandwidth change is to be commited

 *	    right away

 */

int wcd9xxx_slim_reserve_bw(struct wcd9xxx *wcd9xxx,

		u32 bw_ops, bool commit)

{

	if (!wcd9xxx || !wcd9xxx->slim) {

		pr_err("%s: Invalid handle to %s\n",

			__func__,

			(!wcd9xxx) ? "wcd9xxx" : "slim_device");

		return -EINVAL;

	}



	return slim_reservemsg_bw(wcd9xxx->slim, bw_ops, commit);

}

EXPORT_SYMBOL(wcd9xxx_slim_reserve_bw);



/* Interface specifies whether the write is to the interface or general

 * registers.

 */

include/linux/mfd/wcd9xxx/core.h

+2 −0
Original line number Diff line number Diff line
@@ -224,6 +224,8 @@ int wcd9xxx_interface_reg_write(struct wcd9xxx *wcd9xxx, unsigned short reg, 
int wcd9xxx_get_logical_addresses(u8 *pgd_la, u8 *inf_la);

int wcd9xxx_slim_write_repeat(struct wcd9xxx *wcd9xxx, unsigned short reg,

			     int bytes, void *src);

int wcd9xxx_slim_reserve_bw(struct wcd9xxx *wcd9xxx,

			    u32 bw_ops, bool commit);



#if defined(CONFIG_WCD9310_CODEC) || \

	defined(CONFIG_WCD9304_CODEC) || \