[E3-hacking] [PATCH] OMAP1: fix redundant UARTs pin muxing that can break other hardware support

Janusz Krzysztofik jkrzyszt at tis.icnet.pl
Wed Oct 21 17:27:53 BST 2009


Wednesday 21 October 2009 02:51:35 Tony Lindgren napisał(a):
>
> Let's just remove the omap_cfg_reg() calls from mach-omap1/serial.c, and
> add them to the board-*.c files like you suggest above. We should be able
> to find which ports to mux by looking at the enabled_uarts mask in the
> commit mentioned above.

Here you are (board-*.c changes limited to those OMAP1510 based).
Created against linux-2.6.32-rc5.
Tested on Amsdtrad Delta only.

Signed-off-by: Janusz Krzysztofik <jkrzyszt at tis.icnet.pl>

---
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-ams-delta.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-ams-delta.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-ams-delta.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-ams-delta.c	2009-10-21 17:41:29.000000000 +0200
@@ -219,6 +219,10 @@ static struct platform_device *ams_delta
 
 static void __init ams_delta_init(void)
 {
+	/* setup mux pins for uarts, removed from serial.c */
+	omap_cfg_reg(UART1_TX);
+	omap_cfg_reg(UART1_RTS);
+
 	iotable_init(ams_delta_io_desc, ARRAY_SIZE(ams_delta_io_desc));
 
 	omap_board_config = ams_delta_config;
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-generic.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-generic.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-generic.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-generic.c	2009-10-21 18:15:37.000000000 +0200
@@ -64,6 +64,14 @@ static void __init omap_generic_init(voi
 {
 #ifdef CONFIG_ARCH_OMAP15XX
 	if (cpu_is_omap15xx()) {
+		/* setup mux pins for uarts, removed from serial.c */
+		omap_cfg_reg(UART1_TX);
+		omap_cfg_reg(UART1_RTS);
+		omap_cfg_reg(UART2_TX);
+		omap_cfg_reg(UART2_RTS);
+		omap_cfg_reg(UART3_TX);
+		omap_cfg_reg(UART3_RX);
+
 		omap_usb_init(&generic1510_usb_config);
 	}
 #endif
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-innovator.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-innovator.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-innovator.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-innovator.c	2009-10-21 18:16:59.000000000 +0200
@@ -376,6 +376,24 @@ static void __init innovator_init(void)
 {
 #ifdef CONFIG_ARCH_OMAP15XX
 	if (cpu_is_omap1510()) {
+		/* setup mux pins for uarts, removed from serial.c */
+		omap_cfg_reg(UART1_TX);
+		omap_cfg_reg(UART1_RTS);
+		omap_cfg_reg(UART2_TX);
+		omap_cfg_reg(UART2_RTS);
+		omap_cfg_reg(UART3_TX);
+		omap_cfg_reg(UART3_RX);
+
+		reg = fpga_read(OMAP1510_FPGA_POWER);
+		reg |= OMAP1510_FPGA_PCR_COM1_EN;
+		fpga_write(reg, OMAP1510_FPGA_POWER);
+		udelay(10);
+
+		reg = fpga_read(OMAP1510_FPGA_POWER);
+		reg |= OMAP1510_FPGA_PCR_COM2_EN;
+		fpga_write(reg, OMAP1510_FPGA_POWER);
+		udelay(10);
+
 		platform_add_devices(innovator1510_devices, ARRAY_SIZE(innovator1510_devices));
 		spi_register_board_info(innovator1510_boardinfo,
 				ARRAY_SIZE(innovator1510_boardinfo));
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-palmte.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-palmte.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-palmte.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-palmte.c	2009-10-21 17:38:59.000000000 +0200
@@ -342,6 +342,14 @@ static void __init palmte_misc_gpio_setu
 
 static void __init omap_palmte_init(void)
 {
+	/* setup mux pins for uarts, removed from serial.c */
+	omap_cfg_reg(UART1_TX);
+	omap_cfg_reg(UART1_RTS);
+	omap_cfg_reg(UART2_TX);
+	omap_cfg_reg(UART2_RTS);
+	omap_cfg_reg(UART3_TX);
+	omap_cfg_reg(UART3_RX);
+
 	omap_board_config = palmte_config;
 	omap_board_config_size = ARRAY_SIZE(palmte_config);
 
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-palmtt.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-palmtt.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-palmtt.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-palmtt.c	2009-10-21 17:39:19.000000000 +0200
@@ -289,6 +289,14 @@ static void __init omap_mpu_wdt_mode(int
 
 static void __init omap_palmtt_init(void)
 {
+	/* setup mux pins for uarts, removed from serial.c */
+	omap_cfg_reg(UART1_TX);
+	omap_cfg_reg(UART1_RTS);
+	omap_cfg_reg(UART2_TX);
+	omap_cfg_reg(UART2_RTS);
+	omap_cfg_reg(UART3_TX);
+	omap_cfg_reg(UART3_RX);
+
 	omap_mpu_wdt_mode(0);
 
 	omap_board_config = palmtt_config;
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-palmz71.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-palmz71.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-palmz71.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-palmz71.c	2009-10-21 17:39:34.000000000 +0200
@@ -307,6 +307,14 @@ palmz71_gpio_setup(int early)
 static void __init
 omap_palmz71_init(void)
 {
+	/* setup mux pins for uarts, removed from serial.c */
+	omap_cfg_reg(UART1_TX);
+	omap_cfg_reg(UART1_RTS);
+	omap_cfg_reg(UART2_TX);
+	omap_cfg_reg(UART2_RTS);
+	omap_cfg_reg(UART3_TX);
+	omap_cfg_reg(UART3_RX);
+
 	palmz71_gpio_setup(1);
 	omap_mpu_wdt_mode(0);
 
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-sx1.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-sx1.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-sx1.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-sx1.c	2009-10-21 17:40:20.000000000 +0200
@@ -377,6 +377,14 @@ static struct omap_board_config_kernel s
 
 static void __init omap_sx1_init(void)
 {
+	/* setup mux pins for uarts, removed from serial.c */
+	omap_cfg_reg(UART1_TX);
+	omap_cfg_reg(UART1_RTS);
+	omap_cfg_reg(UART2_TX);
+	omap_cfg_reg(UART2_RTS);
+	omap_cfg_reg(UART3_TX);
+	omap_cfg_reg(UART3_RX);
+
 	platform_add_devices(sx1_devices, ARRAY_SIZE(sx1_devices));
 
 	omap_board_config = sx1_config;
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-voiceblue.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-voiceblue.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/board-voiceblue.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/board-voiceblue.c	2009-10-21 17:40:57.000000000 +0200
@@ -152,6 +152,14 @@ static void __init voiceblue_init_irq(vo
 
 static void __init voiceblue_init(void)
 {
+	/* setup mux pins for uarts, removed from serial.c */
+	omap_cfg_reg(UART1_TX);
+	omap_cfg_reg(UART1_RTS);
+	omap_cfg_reg(UART2_TX);
+	omap_cfg_reg(UART2_RTS);
+	omap_cfg_reg(UART3_TX);
+	omap_cfg_reg(UART3_RX);
+
 	/* Watchdog */
 	gpio_request(0, "Watchdog");
 	/* smc91x reset */
diff -upr linux-2.6.32-rc5.orig/arch/arm/mach-omap1/serial.c linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/serial.c
--- linux-2.6.32-rc5.orig/arch/arm/mach-omap1/serial.c	2009-10-16 02:41:50.000000000 +0200
+++ linux-2.6.32-rc5.fixed/arch/arm/mach-omap1/serial.c	2009-10-21 17:53:49.000000000 +0200
@@ -143,16 +143,6 @@ void __init omap_serial_init(void)
 				if (cpu_is_omap15xx())
 					clk_set_rate(uart1_ck, 12000000);
 			}
-			if (cpu_is_omap15xx()) {
-				omap_cfg_reg(UART1_TX);
-				omap_cfg_reg(UART1_RTS);
-				if (machine_is_omap_innovator()) {
-					reg = fpga_read(OMAP1510_FPGA_POWER);
-					reg |= OMAP1510_FPGA_PCR_COM1_EN;
-					fpga_write(reg, OMAP1510_FPGA_POWER);
-					udelay(10);
-				}
-			}
 			break;
 		case 1:
 			uart2_ck = clk_get(NULL, "uart2_ck");
@@ -165,16 +155,6 @@ void __init omap_serial_init(void)
 				else
 					clk_set_rate(uart2_ck, 48000000);
 			}
-			if (cpu_is_omap15xx()) {
-				omap_cfg_reg(UART2_TX);
-				omap_cfg_reg(UART2_RTS);
-				if (machine_is_omap_innovator()) {
-					reg = fpga_read(OMAP1510_FPGA_POWER);
-					reg |= OMAP1510_FPGA_PCR_COM2_EN;
-					fpga_write(reg, OMAP1510_FPGA_POWER);
-					udelay(10);
-				}
-			}
 			break;
 		case 2:
 			uart3_ck = clk_get(NULL, "uart3_ck");
@@ -185,10 +165,6 @@ void __init omap_serial_init(void)
 				if (cpu_is_omap15xx())
 					clk_set_rate(uart3_ck, 12000000);
 			}
-			if (cpu_is_omap15xx()) {
-				omap_cfg_reg(UART3_TX);
-				omap_cfg_reg(UART3_RX);
-			}
 			break;
 		}
 		omap_serial_reset(&serial_platform_data[i]);



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