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Commit 9d4e5bb3 authored by Juuso Oikarinen's avatar Juuso Oikarinen Committed by John W. Linville
Browse files

wl1271: Configure clock-request drive mode to open-drain 



This patch configures the wl1271 chipset clock-request line to be
driver in open-drain mode instead of push-pull.

Signed-off-by: default avatarJuuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: default avatarLuciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: default avatarLuciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 9cea461f

drivers/net/wireless/wl12xx/wl1271_boot.c

+6 −2
Original line number Diff line number Diff line
@@ -451,11 +451,15 @@ int wl1271_boot(struct wl1271 *wl) 


	if (REF_CLOCK != 0) {

		u16 val;

		/* Set clock type */

		/* Set clock type (open drain) */

		val = wl1271_top_reg_read(wl, OCP_REG_CLK_TYPE);

		val &= FREF_CLK_TYPE_BITS;

		val |= CLK_REQ_PRCM;

		wl1271_top_reg_write(wl, OCP_REG_CLK_TYPE, val);



		/* Set clock pull mode (no pull) */

		val = wl1271_top_reg_read(wl, OCP_REG_CLK_PULL);

		val |= NO_PULL;

		wl1271_top_reg_write(wl, OCP_REG_CLK_PULL, val);

	} else {

		u16 val;

		/* Set clock polarity */

drivers/net/wireless/wl12xx/wl1271_boot.h

+5 −2
Original line number Diff line number Diff line
@@ -53,10 +53,13 @@ struct wl1271_static_data { 
#define OCP_REG_POLARITY     0x0064

#define OCP_REG_CLK_TYPE     0x0448

#define OCP_REG_CLK_POLARITY 0x0cb2

#define OCP_REG_CLK_PULL     0x0cb4





#define CMD_MBOX_ADDRESS     0x407B4



#define POLARITY_LOW         BIT(1)

#define NO_PULL              (BIT(14) | BIT(15))



#define FREF_CLK_TYPE_BITS     0xfffffe7f

#define CLK_REQ_PRCM           0x100