[PATCH 1/2] arm: lpc32xx: restart: add support for soft reset
From: slemieux.tyco at gmail.com <hidden>
Date: 2016-02-18 21:35:23
Subsystem:
arm port, arm/lpc32xx soc support, the rest · Maintainers:
Russell King, Vladimir Zapolskiy, Piotr Wojtaszczyk, Linus Torvalds
From: Sylvain Lemieux <redacted> Add support for explicit soft reset using the reboot mode. The default reboot mode behavior is unchanged; you can specified the default reboot type in the board specific file "DT_MACHINE_START" definition using the "reboot_mode" parameter. Signed-off-by: Sylvain Lemieux <redacted> --- arch/arm/mach-lpc32xx/common.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-lpc32xx/common.c b/arch/arm/mach-lpc32xx/common.c
index 716e83e..9eb9f22 100644
--- a/arch/arm/mach-lpc32xx/common.c
+++ b/arch/arm/mach-lpc32xx/common.c@@ -200,9 +200,16 @@ void lpc23xx_restart(enum reboot_mode mode, const char *cmd) __raw_writel(LPC32XX_CLKPWR_PWMCLK_WDOG_EN, LPC32XX_CLKPWR_TIMER_CLK_CTRL); - /* Instant assert of RESETOUT_N with pulse length 1mS */ - __raw_writel(13000, io_p2v(LPC32XX_WDTIM_BASE + 0x18)); - __raw_writel(0x70, io_p2v(LPC32XX_WDTIM_BASE + 0xC)); + if (mode == REBOOT_SOFT) { + /* Force match output active */ + __raw_writel(0x01, io_p2v(LPC32XX_WDTIM_BASE + 0x14)); + /* Enable internal reset on match output (RESOUT_N not asserted) */ + __raw_writel(0x08, io_p2v(LPC32XX_WDTIM_BASE + 0xC)); + } else { + /* Instant assert of RESETOUT_N with pulse length 1mS */ + __raw_writel(13000, io_p2v(LPC32XX_WDTIM_BASE + 0x18)); + __raw_writel(0x70, io_p2v(LPC32XX_WDTIM_BASE + 0xC)); + } /* Wait for watchdog to reset system */ while (1)
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1.8.3.1