imx: imx_clock: wdog: Add watchdog clock API
This patch adds a set of functions to enable the clock for each of the
watchdog IP blocks.
Unlike the MMC and UART blocks, the watchdog blocks operate off of the one
root clock, only the clock-gates are enable/disabled individually.
As a consequence the function clock_set_wdog_clk_root_bits() is used to set
the root-slice just once for all of the watchdog blocks.
Future implementations may need to change this model but for now on the one
supported processor and similar NXP SoCs this model should work fine.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
diff --git a/plat/imx/common/imx_clock.c b/plat/imx/common/imx_clock.c
index 0a13d4d..09cd101 100644
--- a/plat/imx/common/imx_clock.c
+++ b/plat/imx/common/imx_clock.c
@@ -98,3 +98,37 @@
/* Enable the clock gate */
imx_clock_gate_enable(ccm_ccgr_id, true);
}
+
+void imx_clock_enable_wdog(unsigned int wdog_id)
+{
+ unsigned int ccm_ccgr_id = CCM_CCGR_ID_WDOG1 + wdog_id;
+
+ /* Check for error */
+ if (wdog_id > MXC_MAX_WDOG_NUM)
+ return;
+
+ /* Enable the clock gate */
+ imx_clock_gate_enable(ccm_ccgr_id, true);
+}
+
+void imx_clock_disable_wdog(unsigned int wdog_id)
+{
+ unsigned int ccm_trgt_id = CCM_TRT_ID_WDOG_CLK_ROOT;
+ unsigned int ccm_ccgr_id = CCM_CCGR_ID_WDOG1 + wdog_id;
+
+ /* Check for error */
+ if (wdog_id > MXC_MAX_WDOG_NUM)
+ return;
+
+ /* Disable the clock gate */
+ imx_clock_gate_enable(ccm_ccgr_id, false);
+
+ /* Clear the target */
+ imx_clock_target_clr(ccm_trgt_id, 0xFFFFFFFF);
+}
+
+void imx_clock_set_wdog_clk_root_bits(uint32_t wdog_clk_root_en_bits)
+{
+ /* Enable the common clock root just once */
+ imx_clock_target_set(CCM_TRT_ID_WDOG_CLK_ROOT, wdog_clk_root_en_bits);
+}