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Subject[PATCH 04/10] omap1: Fix redundant UARTs pin muxing that can break other hardware support
From
Date
From: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>

Commit 15ac408ee5a509053a765b816e9179515329369f removed enabled_uart
and OMAP_TAG_UART. This works for mach-omap2, but causes issues on
mach-omap1 for some boards as the mach-omap1 serial.c was muxing
pins based on the enabled_uart flag for 15xx.

Fix this by muxing pins in board-*.c files for the 15xx boards for
the uart ports that had enabled_uart flag set before the commit
above.

Tested on Amsdtrad Delta only.

Note that in the future we should add support for powering down
the uarts with a timer like mach-omap2/serial.c does. Otherwise
the enabled uarts will be blocking retention-while-idle.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
arch/arm/mach-omap1/board-ams-delta.c | 4 ++++
arch/arm/mach-omap1/board-generic.c | 8 ++++++++
arch/arm/mach-omap1/board-innovator.c | 20 ++++++++++++++++++++
arch/arm/mach-omap1/board-palmte.c | 8 ++++++++
arch/arm/mach-omap1/board-palmtt.c | 8 ++++++++
arch/arm/mach-omap1/board-palmz71.c | 8 ++++++++
arch/arm/mach-omap1/board-sx1.c | 8 ++++++++
arch/arm/mach-omap1/board-voiceblue.c | 8 ++++++++
arch/arm/mach-omap1/serial.c | 26 --------------------------
9 files changed, 72 insertions(+), 26 deletions(-)
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 42920f9..972499e 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -219,6 +219,10 @@ static struct platform_device *ams_delta_devices[] __initdata = {

static void __init ams_delta_init(void)
{
+ /* mux pins for uarts */
+ 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 --git a/arch/arm/mach-omap1/board-generic.c b/arch/arm/mach-omap1/board-generic.c
index fb47239..6c8a41f 100644
--- a/arch/arm/mach-omap1/board-generic.c
+++ b/arch/arm/mach-omap1/board-generic.c
@@ -64,6 +64,14 @@ static void __init omap_generic_init(void)
{
#ifdef CONFIG_ARCH_OMAP15XX
if (cpu_is_omap15xx()) {
+ /* mux pins for uarts */
+ 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 --git a/arch/arm/mach-omap1/board-innovator.c b/arch/arm/mach-omap1/board-innovator.c
index cc2abbb..cd6c395 100644
--- a/arch/arm/mach-omap1/board-innovator.c
+++ b/arch/arm/mach-omap1/board-innovator.c
@@ -376,6 +376,26 @@ static void __init innovator_init(void)
{
#ifdef CONFIG_ARCH_OMAP15XX
if (cpu_is_omap1510()) {
+ unsigned char reg;
+
+ /* mux pins for uarts */
+ 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 --git a/arch/arm/mach-omap1/board-palmte.c b/arch/arm/mach-omap1/board-palmte.c
index 90dd043..4de2584 100644
--- a/arch/arm/mach-omap1/board-palmte.c
+++ b/arch/arm/mach-omap1/board-palmte.c
@@ -342,6 +342,14 @@ static void __init palmte_misc_gpio_setup(void)

static void __init omap_palmte_init(void)
{
+ /* mux pins for uarts */
+ 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 --git a/arch/arm/mach-omap1/board-palmtt.c b/arch/arm/mach-omap1/board-palmtt.c
index 8256139..d972cf9 100644
--- a/arch/arm/mach-omap1/board-palmtt.c
+++ b/arch/arm/mach-omap1/board-palmtt.c
@@ -289,6 +289,14 @@ static void __init omap_mpu_wdt_mode(int mode) {

static void __init omap_palmtt_init(void)
{
+ /* mux pins for uarts */
+ 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 --git a/arch/arm/mach-omap1/board-palmz71.c b/arch/arm/mach-omap1/board-palmz71.c
index 81b6bde..986bd4d 100644
--- a/arch/arm/mach-omap1/board-palmz71.c
+++ b/arch/arm/mach-omap1/board-palmz71.c
@@ -307,6 +307,14 @@ palmz71_gpio_setup(int early)
static void __init
omap_palmz71_init(void)
{
+ /* mux pins for uarts */
+ 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 --git a/arch/arm/mach-omap1/board-sx1.c b/arch/arm/mach-omap1/board-sx1.c
index 02c85ca..056ae64 100644
--- a/arch/arm/mach-omap1/board-sx1.c
+++ b/arch/arm/mach-omap1/board-sx1.c
@@ -377,6 +377,14 @@ static struct omap_board_config_kernel sx1_config[] __initdata = {

static void __init omap_sx1_init(void)
{
+ /* mux pins for uarts */
+ 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 --git a/arch/arm/mach-omap1/board-voiceblue.c b/arch/arm/mach-omap1/board-voiceblue.c
index c06e7a5..07b0752 100644
--- a/arch/arm/mach-omap1/board-voiceblue.c
+++ b/arch/arm/mach-omap1/board-voiceblue.c
@@ -152,6 +152,14 @@ static void __init voiceblue_init_irq(void)

static void __init voiceblue_init(void)
{
+ /* mux pins for uarts */
+ 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 --git a/arch/arm/mach-omap1/serial.c b/arch/arm/mach-omap1/serial.c
index d496e50..d23979b 100644
--- a/arch/arm/mach-omap1/serial.c
+++ b/arch/arm/mach-omap1/serial.c
@@ -131,8 +131,6 @@ void __init omap_serial_init(void)
}

for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
- unsigned char reg;
-
switch (i) {
case 0:
uart1_ck = clk_get(NULL, "uart1_ck");
@@ -143,16 +141,6 @@ 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 +153,6 @@ 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 +163,6 @@ 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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