Microchip: MEC172x: watchdog driver
Update wdt driver to support MEC172x device Signed-off-by: Jay Vasanth <jay.vasanth@microchip.com>
This commit is contained in:
parent
5b16dd4326
commit
4120a889a4
4 changed files with 82 additions and 26 deletions
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@ -16,8 +16,14 @@ LOG_MODULE_REGISTER(wdt_mchp_xec);
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#include <soc.h>
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#include <errno.h>
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#define WDT_XEC_REG_BASE \
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((WDT_Type *)(DT_INST_REG_ADDR(0)))
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BUILD_ASSERT(DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) == 1,
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"add exactly one wdog node to the devicetree");
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struct wdt_xec_config {
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struct wdt_regs *regs;
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uint8_t girq;
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uint8_t girq_pos;
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};
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struct wdt_xec_data {
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wdt_callback_t cb;
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@ -26,10 +32,11 @@ struct wdt_xec_data {
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static int wdt_xec_setup(const struct device *dev, uint8_t options)
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{
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WDT_Type *wdt_regs = WDT_XEC_REG_BASE;
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struct wdt_xec_config const *cfg = dev->config;
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struct wdt_xec_data *data = dev->data;
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struct wdt_regs *regs = cfg->regs;
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if (wdt_regs->CTRL & MCHP_WDT_CTRL_EN) {
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if (regs->CTRL & MCHP_WDT_CTRL_EN) {
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return -EBUSY;
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}
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@ -44,12 +51,12 @@ static int wdt_xec_setup(const struct device *dev, uint8_t options)
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}
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if (options & WDT_OPT_PAUSE_HALTED_BY_DBG) {
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wdt_regs->CTRL |= MCHP_WDT_CTRL_JTAG_STALL_EN;
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regs->CTRL |= MCHP_WDT_CTRL_JTAG_STALL_EN;
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} else {
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wdt_regs->CTRL &= ~MCHP_WDT_CTRL_JTAG_STALL_EN;
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regs->CTRL &= ~MCHP_WDT_CTRL_JTAG_STALL_EN;
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}
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wdt_regs->CTRL |= MCHP_WDT_CTRL_EN;
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regs->CTRL |= MCHP_WDT_CTRL_EN;
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LOG_DBG("WDT Setup and enabled");
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@ -58,14 +65,15 @@ static int wdt_xec_setup(const struct device *dev, uint8_t options)
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static int wdt_xec_disable(const struct device *dev)
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{
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WDT_Type *wdt_regs = WDT_XEC_REG_BASE;
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struct wdt_xec_config const *cfg = dev->config;
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struct wdt_xec_data *data = dev->data;
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struct wdt_regs *regs = cfg->regs;
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if (!(wdt_regs->CTRL & MCHP_WDT_CTRL_EN)) {
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if (!(regs->CTRL & MCHP_WDT_CTRL_EN)) {
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return -EALREADY;
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}
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wdt_regs->CTRL &= ~MCHP_WDT_CTRL_EN;
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regs->CTRL &= ~MCHP_WDT_CTRL_EN;
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data->timeout_installed = false;
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LOG_DBG("WDT Disabled");
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@ -76,10 +84,11 @@ static int wdt_xec_disable(const struct device *dev)
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static int wdt_xec_install_timeout(const struct device *dev,
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const struct wdt_timeout_cfg *config)
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{
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WDT_Type *wdt_regs = WDT_XEC_REG_BASE;
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struct wdt_xec_config const *cfg = dev->config;
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struct wdt_xec_data *data = dev->data;
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struct wdt_regs *regs = cfg->regs;
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if (wdt_regs->CTRL & MCHP_WDT_CTRL_EN) {
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if (regs->CTRL & MCHP_WDT_CTRL_EN) {
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return -EBUSY;
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}
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@ -88,20 +97,20 @@ static int wdt_xec_install_timeout(const struct device *dev,
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return -EINVAL;
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}
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wdt_regs->LOAD = 0;
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regs->LOAD = 0;
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data->cb = config->callback;
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if (data->cb) {
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wdt_regs->CTRL |= MCHP_WDT_CTRL_MODE_IRQ;
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wdt_regs->IEN |= MCHP_WDT_IEN_EVENT_IRQ_EN;
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regs->CTRL |= MCHP_WDT_CTRL_MODE_IRQ;
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regs->IEN |= MCHP_WDT_IEN_EVENT_IRQ_EN;
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LOG_DBG("WDT callback enabled");
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} else {
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/* Setting WDT_FLAG_RESET_SOC or not will have no effect:
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* even after the cb, if anything is done, SoC will reset
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*/
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wdt_regs->CTRL &= ~MCHP_WDT_CTRL_MODE_IRQ;
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wdt_regs->IEN &= ~MCHP_WDT_IEN_EVENT_IRQ_EN;
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regs->CTRL &= ~MCHP_WDT_CTRL_MODE_IRQ;
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regs->IEN &= ~MCHP_WDT_IEN_EVENT_IRQ_EN;
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LOG_DBG("WDT Reset enabled");
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}
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@ -110,7 +119,7 @@ static int wdt_xec_install_timeout(const struct device *dev,
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* (See datasheet 18.6.1.4: 33/32.768 KHz = 1.007ms)
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* Let's use the given window directly.
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*/
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wdt_regs->LOAD = config->window.max;
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regs->LOAD = config->window.max;
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data->timeout_installed = true;
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@ -119,26 +128,28 @@ static int wdt_xec_install_timeout(const struct device *dev,
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static int wdt_xec_feed(const struct device *dev, int channel_id)
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{
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WDT_Type *wdt_regs = WDT_XEC_REG_BASE;
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struct wdt_xec_config const *cfg = dev->config;
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struct wdt_regs *regs = cfg->regs;
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ARG_UNUSED(dev);
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ARG_UNUSED(channel_id);
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if (!(wdt_regs->CTRL & MCHP_WDT_CTRL_EN)) {
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if (!(regs->CTRL & MCHP_WDT_CTRL_EN)) {
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return -EINVAL;
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}
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LOG_DBG("WDT Kicking");
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wdt_regs->KICK = 1;
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regs->KICK = 1;
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return 0;
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}
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static void wdt_xec_isr(const struct device *dev)
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{
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WDT_Type *wdt_regs = WDT_XEC_REG_BASE;
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struct wdt_xec_config const *cfg = dev->config;
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struct wdt_xec_data *data = dev->data;
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struct wdt_regs *regs = cfg->regs;
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LOG_DBG("WDT ISR");
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@ -146,8 +157,12 @@ static void wdt_xec_isr(const struct device *dev)
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data->cb(dev, 0);
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}
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MCHP_GIRQ_SRC(MCHP_WDT_GIRQ) = MCHP_WDT_GIRQ_VAL;
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wdt_regs->IEN &= ~MCHP_WDT_IEN_EVENT_IRQ_EN;
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#ifdef CONFIG_SOC_SERIES_MEC172X
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mchp_soc_ecia_girq_src_clr(cfg->girq, cfg->girq_pos);
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#else
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MCHP_GIRQ_SRC(MCHP_WDT_GIRQ) = BIT(cfg->girq_pos);
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#endif
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regs->IEN &= ~MCHP_WDT_IEN_EVENT_IRQ_EN;
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}
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static const struct wdt_driver_api wdt_xec_api = {
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@ -159,11 +174,17 @@ static const struct wdt_driver_api wdt_xec_api = {
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static int wdt_xec_init(const struct device *dev)
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{
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struct wdt_xec_config const *cfg = dev->config;
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if (IS_ENABLED(CONFIG_WDT_DISABLE_AT_BOOT)) {
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wdt_xec_disable(dev);
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}
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MCHP_GIRQ_ENSET(MCHP_WDT_GIRQ) = MCHP_WDT_GIRQ_VAL;
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#ifdef CONFIG_SOC_SERIES_MEC172X
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mchp_soc_ecia_girq_src_en(cfg->girq, cfg->girq_pos);
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#else
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MCHP_GIRQ_ENSET(MCHP_WDT_GIRQ) = BIT(cfg->girq_pos);
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#endif
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IRQ_CONNECT(DT_INST_IRQN(0),
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DT_INST_IRQ(0, priority),
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@ -173,9 +194,15 @@ static int wdt_xec_init(const struct device *dev)
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return 0;
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}
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static const struct wdt_xec_config wdt_xec_config_0 = {
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.regs = (struct wdt_regs *)(DT_INST_REG_ADDR(0)),
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.girq = DT_INST_PROP_BY_IDX(0, girqs, 0),
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.girq_pos = DT_INST_PROP_BY_IDX(0, girqs, 1),
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};
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static struct wdt_xec_data wdt_xec_dev_data;
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DEVICE_DT_INST_DEFINE(0, wdt_xec_init, NULL,
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&wdt_xec_dev_data, NULL,
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&wdt_xec_dev_data, &wdt_xec_config_0,
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PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
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&wdt_xec_api);
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@ -89,6 +89,8 @@
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compatible = "microchip,xec-watchdog";
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reg = <0x40000400 0x400>;
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interrupts = <171 0>;
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girqs = <21 2>;
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pcrs = <1 9>;
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label = "WDT_0";
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};
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uart0: uart@400f2400 {
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@ -354,6 +354,7 @@
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#gpio-cells=<2>;
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};
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wdog: watchdog@40000400 {
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compatible = "microchip,xec-watchdog";
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reg = <0x40000400 0x400>;
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interrupts = <171 0>;
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girqs = <21 2>;
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@ -16,3 +16,29 @@ properties:
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interrupts:
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required: true
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girqs:
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type: array
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required: true
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description: Array of GIRQ numbers [8:26] and bit positions [0:31].
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pcrs:
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type: array
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required: true
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description: PCR sleep enable register index and bit position.
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"#girq-cells":
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type: int
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const: 2
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"#pcr-cells":
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type: int
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const: 2
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girq-cells:
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- girq_num
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- bitpos
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pcr-cells:
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- reg_index
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- bitpos
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