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ARM: OMAP2+: UART: cleanup + remove uart pm specific API 

In preparation to UART runtime conversion remove uart specific calls
from pm24xx/34xx files and their definition from serial.c
These func calls will no more be used with upcoming uart runtime design.

1.) omap_uart_prepare_suspend :- can be taken care with driver suspend hooks.
2.) omap_uart_enable_irqs :- Used to enable/disable uart irq's in suspend
    path from PM code, this is removed as same is handled by
    uart_suspend_port/uart_resume_port in omap-serial driver which will
    do an port_shutdown on suspend freeing irq and port_startup on resume
    enabling back irq.
3.) Remove prepare_idle/resume_idle calls used to gate uart clocks.
    UART clocks can be gated within driver using runtime funcs
    and be woken up using irq_chaining from omap_prm driver.
4.) Remove console_locking from idle path as clock gating is done withing
    driver itself with runtime API. Remove is_suspending check used to acquire
    console_lock.

Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Govindraj.R 2011-11-09 17:22:30 +05:30 committed by Kevin Hilman
parent 4390f5b2cb
commit 8384c9749f
4 changed files with 0 additions and 119 deletions
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18
arch/arm/mach-omap2/pm24xx.c
View File

@ -30,7 +30,6 @@
#include <linux/irq.h>
#include <linux/time.h>
#include <linux/gpio.h>
#include <linux/console.h>
#include <asm/mach/time.h>
#include <asm/mach/irq.h>
@ -127,27 +126,11 @@ static void omap2_enter_full_retention(void)
if (omap_irq_pending())
goto no_sleep;
/* Block console output in case it is on one of the OMAP UARTs */
if (!is_suspending())
if (!console_trylock())
goto no_sleep;
omap_uart_prepare_idle(0);
omap_uart_prepare_idle(1);
omap_uart_prepare_idle(2);
/* Jump to SRAM suspend code */
omap2_sram_suspend(sdrc_read_reg(SDRC_DLLA_CTRL),
OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL),
OMAP_SDRC_REGADDR(SDRC_POWER));
omap_uart_resume_idle(2);
omap_uart_resume_idle(1);
omap_uart_resume_idle(0);
if (!is_suspending())
console_unlock();
no_sleep:
omap2_gpio_resume_after_idle();
@ -291,7 +274,6 @@ static int omap2_pm_suspend(void)
mir1 = omap_readl(0x480fe0a4);
omap_writel(1 << 5, 0x480fe0ac);
omap_uart_prepare_suspend();
omap2_enter_full_retention();
omap_writel(mir1, 0x480fe0a4);

32
arch/arm/mach-omap2/pm34xx.c
View File

@ -28,7 +28,6 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/console.h>
#include <trace/events/power.h>
#include <asm/suspend.h>
@ -54,15 +53,6 @@
#ifdef CONFIG_SUSPEND
static suspend_state_t suspend_state = PM_SUSPEND_ON;
static inline bool is_suspending(void)
{
return (suspend_state != PM_SUSPEND_ON) && console_suspend_enabled;
}
#else
static inline bool is_suspending(void)
{
return false;
}
#endif
/* pm34xx errata defined in pm.h */
@ -376,20 +366,11 @@ void omap_sram_idle(void)
omap3_enable_io_chain();
}
/* Block console output in case it is on one of the OMAP UARTs */
if (!is_suspending())
if (per_next_state < PWRDM_POWER_ON ||
core_next_state < PWRDM_POWER_ON)
if (!console_trylock())
goto console_still_active;
pwrdm_pre_transition();
/* PER */
if (per_next_state < PWRDM_POWER_ON) {
per_going_off = (per_next_state == PWRDM_POWER_OFF) ? 1 : 0;
omap_uart_prepare_idle(2);
omap_uart_prepare_idle(3);
omap2_gpio_prepare_for_idle(per_going_off);
if (per_next_state == PWRDM_POWER_OFF)
omap3_per_save_context();
@ -397,8 +378,6 @@ void omap_sram_idle(void)
/* CORE */
if (core_next_state < PWRDM_POWER_ON) {
omap_uart_prepare_idle(0);
omap_uart_prepare_idle(1);
if (core_next_state == PWRDM_POWER_OFF) {
omap3_core_save_context();
omap3_cm_save_context();
@ -447,8 +426,6 @@ void omap_sram_idle(void)
omap3_sram_restore_context();
omap2_sms_restore_context();
}
omap_uart_resume_idle(0);
omap_uart_resume_idle(1);
if (core_next_state == PWRDM_POWER_OFF)
omap2_prm_clear_mod_reg_bits(OMAP3430_AUTO_OFF_MASK,
OMAP3430_GR_MOD,
@ -464,14 +441,8 @@ void omap_sram_idle(void)
omap2_gpio_resume_after_idle();
if (per_prev_state == PWRDM_POWER_OFF)
omap3_per_restore_context();
omap_uart_resume_idle(2);
omap_uart_resume_idle(3);
}
if (!is_suspending())
console_unlock();
console_still_active:
/* Disable IO-PAD and IO-CHAIN wakeup */
if (omap3_has_io_wakeup() &&
(per_next_state < PWRDM_POWER_ON ||
@ -533,7 +504,6 @@ static int omap3_pm_suspend(void)
goto restore;
}
omap_uart_prepare_suspend();
omap3_intc_suspend();
omap_sram_idle();
@ -580,14 +550,12 @@ static int omap3_pm_begin(suspend_state_t state)
{
disable_hlt();
suspend_state = state;
omap_uart_enable_irqs(0);
return 0;
}
static void omap3_pm_end(void)
{
suspend_state = PM_SUSPEND_ON;
omap_uart_enable_irqs(1);
enable_hlt();
return;
}

65
arch/arm/mach-omap2/serial.c
View File

@ -367,51 +367,6 @@ static void omap_uart_idle_timer(unsigned long data)
omap_uart_allow_sleep(uart);
}
void omap_uart_prepare_idle(int num)
{
struct omap_uart_state *uart;
list_for_each_entry(uart, &uart_list, node) {
if (num == uart->num && uart->can_sleep) {
omap_uart_disable_clocks(uart);
return;
}
}
}
void omap_uart_resume_idle(int num)
{
struct omap_uart_state *uart;
list_for_each_entry(uart, &uart_list, node) {
if (num == uart->num && uart->can_sleep) {
omap_uart_enable_clocks(uart);
/* Check for IO pad wakeup */
if (cpu_is_omap34xx() && uart->padconf) {
u16 p = omap_ctrl_readw(uart->padconf);
if (p & OMAP3_PADCONF_WAKEUPEVENT0)
omap_uart_block_sleep(uart);
}
/* Check for normal UART wakeup */
if (__raw_readl(uart->wk_st) & uart->wk_mask)
omap_uart_block_sleep(uart);
return;
}
}
}
void omap_uart_prepare_suspend(void)
{
struct omap_uart_state *uart;
list_for_each_entry(uart, &uart_list, node) {
omap_uart_allow_sleep(uart);
}
}
int omap_uart_can_sleep(void)
{
struct omap_uart_state *uart;
@ -530,26 +485,6 @@ static void omap_uart_idle_init(struct omap_uart_state *uart)
WARN_ON(ret);
}
void omap_uart_enable_irqs(int enable)
{
int ret;
struct omap_uart_state *uart;
list_for_each_entry(uart, &uart_list, node) {
if (enable) {
pm_runtime_put_sync(&uart->pdev->dev);
ret = request_threaded_irq(uart->irq, NULL,
omap_uart_interrupt,
IRQF_SHARED,
"serial idle",
(void *)uart);
} else {
pm_runtime_get_noresume(&uart->pdev->dev);
free_irq(uart->irq, (void *)uart);
}
}
}
static ssize_t sleep_timeout_show(struct device *dev,
struct device_attribute *attr,
char *buf)

4
arch/arm/plat-omap/include/plat/serial.h
View File

@ -111,10 +111,6 @@ extern void omap_serial_init(void);
extern void omap_serial_init_port(struct omap_board_data *bdata);
extern int omap_uart_can_sleep(void);
extern void omap_uart_check_wakeup(void);
extern void omap_uart_prepare_suspend(void);
extern void omap_uart_prepare_idle(int num);
extern void omap_uart_resume_idle(int num);
extern void omap_uart_enable_irqs(int enable);
#endif
#endif