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Merge branch 'bugfix/warn_on_invalid_xtal_freq' into 'master'

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soc/rtc: warn if detected XTAL frequency does not match configured one

See merge request !1242
This commit is contained in:
Ivan Grokhotkov
2017-09-11 18:15:11 +08:00
parent de038f502c 5a88f90a33
commit 1e7c3854d3
3 changed files with 14 additions and 3 deletions
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13
components/soc/esp32/rtc_clk.c
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@@ -541,7 +541,8 @@ void rtc_clk_init(rtc_clk_config_t cfg)
SET_PERI_REG_BITS(ANA_CONFIG_REG, ANA_CONFIG_M, ANA_CONFIG_M, ANA_CONFIG_S);
CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, I2C_APLL_M | I2C_BBPLL_M);
/* Estimate XTAL frequency if requested */
/* Estimate XTAL frequency */
rtc_xtal_freq_t est_xtal_freq = rtc_clk_xtal_freq_estimate();
rtc_xtal_freq_t xtal_freq = cfg.xtal_freq;
if (xtal_freq == RTC_XTAL_FREQ_AUTO) {
if (clk_val_is_valid(READ_PERI_REG(RTC_XTAL_FREQ_REG))) {
@@ -549,13 +550,21 @@ void rtc_clk_init(rtc_clk_config_t cfg)
xtal_freq = rtc_clk_xtal_freq_get();
} else {
/* Not set yet, estimate XTAL frequency based on RTC_FAST_CLK */
xtal_freq = rtc_clk_xtal_freq_estimate();
xtal_freq = est_xtal_freq;
if (xtal_freq == RTC_XTAL_FREQ_AUTO) {
SOC_LOGW(TAG, "Can't estimate XTAL frequency, assuming 26MHz");
xtal_freq = RTC_XTAL_FREQ_26M;
}
}
} else if (!clk_val_is_valid(READ_PERI_REG(RTC_XTAL_FREQ_REG))) {
/* Exact frequency was set in sdkconfig, but still warn if autodetected
* frequency is different. If autodetection failed, worst case we get a
* bit of garbage output.
*/
SOC_LOGW(TAG, "Possibly invalid CONFIG_ESP32_XTAL_FREQ setting (%dMHz). Detected %d MHz.",
xtal_freq, est_xtal_freq);
}
uart_tx_wait_idle(0);
rtc_clk_xtal_freq_update(xtal_freq);
rtc_clk_apb_freq_update(xtal_freq * MHZ);
/* Set CPU frequency */