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drivers: peci: xec: Handle corner case for PECI recovery

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Handle case where PECI recovery occurs in ISR context.

Signed-off-by: Jose Alberto Meza <jose.a.meza.arellano@intel.com>
This commit is contained in:
Jose Alberto Meza 2020-12-30 14:20:40 -08:00 • committed by Anas Nashif
commit f7b5d4b06a
1 changed files with 9 additions and 2 deletions
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11
drivers/peci/peci_mchp_xec.c
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@ -17,6 +17,7 @@ LOG_MODULE_REGISTER(peci_mchp_xec, CONFIG_PECI_LOG_LEVEL);
#define MAX_PECI_CORE_CLOCK 48000u
/* 1 ms */
#define PECI_RESET_DELAY 1000u
#define PECI_RESET_DELAY_MS 1u
/* 100 us */
#define PECI_IDLE_DELAY 100u
/* 5 ms */
@ -135,7 +136,13 @@ static void peci_xec_bus_recovery(const struct device *dev, bool full_reset)
LOG_WRN("%s full_reset:%d", __func__, full_reset);
if (full_reset) {
base->CONTROL = MCHP_PECI_CTRL_PD | MCHP_PECI_CTRL_RST;
k_busy_wait(PECI_RESET_DELAY);
if (k_is_in_isr()) {
k_busy_wait(PECI_RESET_DELAY_MS);
} else {
k_msleep(PECI_RESET_DELAY);
}
base->CONTROL &= ~MCHP_PECI_CTRL_RST;
peci_xec_configure(dev, peci_data.bitrate);
@ -374,7 +381,7 @@ static int peci_xec_init(const struct device *dev)
/* Reset PECI interface */
base->CONTROL |= MCHP_PECI_CTRL_RST;
k_busy_wait(PECI_RESET_DELAY);
k_msleep(PECI_RESET_DELAY_MS);
base->CONTROL &= ~MCHP_PECI_CTRL_RST;
#ifdef CONFIG_PECI_INTERRUPT_DRIVEN