From f8a68c9668a63249d0105444101a99d9eccd7cc2 Mon Sep 17 00:00:00 2001
From: Steve deRosier <derosier@gmail.com>
Date: Tue, 26 Apr 2016 14:41:37 +0300
Subject: ath6kl: add ability to set debug uart baud rate

It's useful to permit the customization of the debug uart baud rate. Enable
this and send down the value to the chip if we're enabling debug.

Signed-off-by: Steve deRosier <steve.derosier@lairdtech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath6kl/core.c b/drivers/net/wireless/ath/ath6kl/core.c
index 4ec02ce..ebb9f16 100644
--- a/drivers/net/wireless/ath/ath6kl/core.c
+++ b/drivers/net/wireless/ath/ath6kl/core.c
@@ -31,6 +31,7 @@ unsigned int debug_mask;
 static unsigned int suspend_mode;
 static unsigned int wow_mode;
 static unsigned int uart_debug;
+static unsigned int uart_rate = 115200;
 static unsigned int ath6kl_p2p;
 static unsigned int testmode;
 static unsigned int recovery_enable;
@@ -40,6 +41,7 @@ module_param(debug_mask, uint, 0644);
 module_param(suspend_mode, uint, 0644);
 module_param(wow_mode, uint, 0644);
 module_param(uart_debug, uint, 0644);
+module_param(uart_rate, uint, 0644);
 module_param(ath6kl_p2p, uint, 0644);
 module_param(testmode, uint, 0644);
 module_param(recovery_enable, uint, 0644);
@@ -180,6 +182,7 @@ int ath6kl_core_init(struct ath6kl *ar, enum ath6kl_htc_type htc_type)
 
 	if (uart_debug)
 		ar->conf_flags |= ATH6KL_CONF_UART_DEBUG;
+	ar->hw.uarttx_rate = uart_rate;
 
 	set_bit(FIRST_BOOT, &ar->flag);
 
diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index 713a571..7a1970e 100644
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -781,6 +781,7 @@ struct ath6kl {
 		u32 board_addr;
 		u32 refclk_hz;
 		u32 uarttx_pin;
+		u32 uarttx_rate;
 		u32 testscript_addr;
 		u8 tx_ant;
 		u8 rx_ant;
diff --git a/drivers/net/wireless/ath/ath6kl/init.c b/drivers/net/wireless/ath/ath6kl/init.c
index 3daeb27..58fb227 100644
--- a/drivers/net/wireless/ath/ath6kl/init.c
+++ b/drivers/net/wireless/ath/ath6kl/init.c
@@ -651,6 +651,14 @@ int ath6kl_configure_target(struct ath6kl *ar)
 	if (status)
 		return status;
 
+	/* Only set the baud rate if we're actually doing debug */
+	if (ar->conf_flags & ATH6KL_CONF_UART_DEBUG) {
+		status = ath6kl_bmi_write_hi32(ar, hi_desired_baud_rate,
+					       ar->hw.uarttx_rate);
+		if (status)
+			return status;
+	}
+
 	/* Configure target refclk_hz */
 	if (ar->hw.refclk_hz != 0) {
 		status = ath6kl_bmi_write_hi32(ar, hi_refclk_hz,
-- 
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