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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: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Juuso Oikarinen 2010-03-26 12:53:15 +02:00 committed by John W. Linville
parent 9cea461fb0
commit 9d4e5bb3de
2 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/wl12xx/wl1271_boot.c
View File

@ -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 */

7
drivers/net/wireless/wl12xx/wl1271_boot.h
View File

@ -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 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