Hi guys,
Wonder any comments for this patch? Thanks
Chin Liang
On Wed, 2013-12-18 at 16:23 -0600, Chin Liang See wrote:
To add the DesignWare watchdog driver support. It required information such as register base address and clock info from configuration header file within include/configs folder.
Signed-off-by: Chin Liang See clsee@altera.com Cc: Anatolij Gustschin agust@denx.de Cc: Albert Aribaud albert.u.boot@aribaud.net Cc: Heiko Schocher hs@denx.de Cc: Tom Rini trini@ti.com
drivers/watchdog/Makefile | 1 + drivers/watchdog/designware_wdt.c | 75 +++++++++++++++++++++++++++++++++++++ 2 files changed, 76 insertions(+) create mode 100644 drivers/watchdog/designware_wdt.c
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 06ced10..0276a10 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -15,3 +15,4 @@ obj-$(CONFIG_S5P) += s5p_wdt.o obj-$(CONFIG_XILINX_TB_WATCHDOG) += xilinx_tb_wdt.o obj-$(CONFIG_BFIN_WATCHDOG) += bfin_wdt.o obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o +obj-$(CONFIG_DESIGNWARE_WATCHDOG) += designware_wdt.o diff --git a/drivers/watchdog/designware_wdt.c b/drivers/watchdog/designware_wdt.c new file mode 100644 index 0000000..c3b14f5 --- /dev/null +++ b/drivers/watchdog/designware_wdt.c @@ -0,0 +1,75 @@ +/*
- Copyright (C) 2013 Altera Corporation <www.altera.com>
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <watchdog.h> +#include <asm/io.h> +#include <asm/utils.h>
+#define DW_WDT_CR 0x00 +#define DW_WDT_TORR 0x04 +#define DW_WDT_CRR 0x0C
+#define DW_WDT_CR_EN_OFFSET 0x00 +#define DW_WDT_CR_RMOD_OFFSET 0x01 +#define DW_WDT_CR_RMOD_VAL 0x00 +#define DW_WDT_CRR_RESTART_VAL 0x76
+/*
- Set the watchdog time interval.
- Counter is 32 bit.
- */
+int designware_wdt_settimeout(unsigned int timeout) +{
- signed int i;
- /* calculate the timeout range value */
- i = (log_2_n_round_up(timeout * CONFIG_DW_WDT_CLOCK_KHZ))\
- 16;- if (i > 15)
i = 15;- if (i < 0)
i = 0;- writel((i | (i<<4)),
(CONFIG_DW_WDT_BASE + DW_WDT_TORR));- return 0;
+}
+void designware_wdt_enable(void) +{
- writel(((DW_WDT_CR_RMOD_VAL << DW_WDT_CR_RMOD_OFFSET) | \
(0x1 << DW_WDT_CR_EN_OFFSET)),(CONFIG_DW_WDT_BASE + DW_WDT_CR));+}
+unsigned int designware_wdt_is_enabled(void) +{
- unsigned long val;
- val = readl((CONFIG_DW_WDT_BASE + DW_WDT_CR));
- return val & 0x1;
+}
+#if defined(CONFIG_HW_WATCHDOG) +void hw_watchdog_reset(void) +{
- if (designware_wdt_is_enabled())
/* restart the watchdog counter */writel(DW_WDT_CRR_RESTART_VAL,(CONFIG_DW_WDT_BASE + DW_WDT_CRR));+}
+void hw_watchdog_init(void) +{
- /* reset to disable the watchdog */
- hw_watchdog_reset();
- /* set timer in miliseconds */
- designware_wdt_settimeout(CONFIG_HW_WATCHDOG_TIMEOUT_MS);
- /* enable the watchdog */
- designware_wdt_enable();
- /* reset the watchdog */
- hw_watchdog_reset();
+} +#endif