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Merge branch 'bugfix/fix_cpu_switches_freq_bug_s2s3_to_v5.0' into 'release/v5.0'

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EspS2/S3: fixed the bug of insufficient voltage when the CPU switches frequency（V5.0）

See merge request espressif/esp-idf!26281
This commit is contained in:
Jiang Jiang Jian 2023-10-25 10:25:14 +08:00
commit 4ba42edafc
3 changed files with 85 additions and 38 deletions
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51
components/esp_hw_support/port/esp32s2/rtc_clk.c
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@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -256,13 +256,40 @@ static void rtc_clk_bbpll_configure(rtc_xtal_freq_t xtal_freq, int pll_freq)
*/
static void rtc_clk_cpu_freq_to_pll_mhz(int cpu_freq_mhz)
{
int dbias = (cpu_freq_mhz == 240) ? DIG_DBIAS_240M : DIG_DBIAS_80M_160M;
/* To avoid the problem of insufficient voltage when the CPU frequency is switched:
* When the CPU frequency is switched from low to high, it is necessary to
* increase the voltage first and then increase the frequency, and the frequency
* needs to wait for the voltage to fully increase before proceeding.
* When the frequency of the CPU is switched from high to low, it is necessary
* to reduce the frequency first and then reduce the voltage.
*/
rtc_cpu_freq_config_t cur_config;
rtc_clk_cpu_freq_get_config(&cur_config);
/* cpu_frequency < 240M: dbias = DIG_DBIAS_XTAL_80M_160M;
* cpu_frequency = 240M: dbias = DIG_DBIAS_240M;
*/
if (cpu_freq_mhz > cur_config.freq_mhz) {
if (cpu_freq_mhz == 240) {
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_240M);
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DBIAS_WAK, RTC_DBIAS_240M);
esp_rom_delay_us(40);
}
}
clk_ll_cpu_set_freq_mhz_from_pll(cpu_freq_mhz);
clk_ll_cpu_set_divider(1);
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, dbias);
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_PLL);
rtc_clk_apb_freq_update(80 * MHZ);
ets_update_cpu_frequency(cpu_freq_mhz);
if (cpu_freq_mhz < cur_config.freq_mhz) {
if (cur_config.freq_mhz == 240) {
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_XTAL_80M_160M);
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DBIAS_WAK, RTC_DBIAS_XTAL_80M_160M);
esp_rom_delay_us(40);
}
}
}
bool rtc_clk_cpu_freq_mhz_to_config(uint32_t freq_mhz, rtc_cpu_freq_config_t* out_config)
@ -404,6 +431,9 @@ void rtc_clk_cpu_freq_set_xtal(void)
*/
static void rtc_clk_cpu_freq_to_xtal(int freq, int div)
{
rtc_cpu_freq_config_t cur_config;
rtc_clk_cpu_freq_get_config(&cur_config);
ets_update_cpu_frequency(freq);
/* Set divider from XTAL to APB clock. Need to set divider to 1 (reg. value 0) first. */
clk_ll_cpu_set_divider(1);
@ -412,15 +442,24 @@ static void rtc_clk_cpu_freq_to_xtal(int freq, int div)
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_XTAL);
rtc_clk_apb_freq_update(freq * MHZ);
/* lower the voltage */
int dbias = (freq <= 2) ? DIG_DBIAS_2M : DIG_DBIAS_XTAL;
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, dbias);
/* lower the voltage
* cpu_frequency < 240M: dbias = DIG_DBIAS_XTAL_80M_160M;
* cpu_frequency = 240M: dbias = DIG_DBIAS_240M;
*/
if (cur_config.freq_mhz == 240) {
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_XTAL_80M_160M);
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DBIAS_WAK, RTC_DBIAS_XTAL_80M_160M);
esp_rom_delay_us(40);
}
}
static void rtc_clk_cpu_freq_to_8m(void)
{
assert(0 && "LDO dbias need to modified");
ets_update_cpu_frequency(8);
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_XTAL);
esp_rom_delay_us(40);
clk_ll_cpu_set_divider(1);
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_RC_FAST);
rtc_clk_apb_freq_update(SOC_CLK_RC_FAST_FREQ_APPROX);

69
components/esp_hw_support/port/esp32s3/rtc_clk.c
View File

@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -175,18 +175,6 @@ static void rtc_clk_bbpll_configure(rtc_xtal_freq_t xtal_freq, int pll_freq)
*/
static void rtc_clk_cpu_freq_to_pll_mhz(int cpu_freq_mhz)
{
/* cpu_frequency < 240M: dbias = pvt-dig + 2;
cpu_frequency = 240M: dbias = pvt-dig + 3;
*/
if (cpu_freq_mhz != 240) {
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
} else {
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_240m);
}
esp_rom_delay_us(40);
/* There are totally 6 LDO slaves(all on by default). At the moment of swithing LDO slave, LDO voltage will also change instantaneously.
* LDO slave can reduce the voltage change caused by switching frequency.
* CPU frequency <= 40M : just open 3 LDO slaves; CPU frequency = 80M : open 4 LDO slaves; CPU frequency = 160M : open 5 LDO slaves; CPU frequency = 240M : open 6 LDO slaves;
@ -197,21 +185,31 @@ static void rtc_clk_cpu_freq_to_pll_mhz(int cpu_freq_mhz)
int pd_slave = cpu_freq_mhz / 80;
rtc_cpu_freq_config_t cur_config;
rtc_clk_cpu_freq_get_config(&cur_config);
/* cpu_frequency < 240M: dbias = pvt-dig + 2;
* cpu_frequency = 240M: dbias = pvt-dig + 3;
*/
if (cpu_freq_mhz > cur_config.freq_mhz) {
if (cpu_freq_mhz == 240) {
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_240m);
esp_rom_delay_us(40);
}
REG_SET_FIELD(RTC_CNTL_DATE_REG, RTC_CNTL_SLAVE_PD, DEFAULT_LDO_SLAVE >> pd_slave);
clk_ll_cpu_set_freq_mhz_from_pll(cpu_freq_mhz);
clk_ll_cpu_set_divider(1);
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_PLL);
rtc_clk_apb_freq_update(80 * MHZ);
ets_update_cpu_frequency(cpu_freq_mhz);
} else {
clk_ll_cpu_set_freq_mhz_from_pll(cpu_freq_mhz);
clk_ll_cpu_set_divider(1);
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_PLL);
rtc_clk_apb_freq_update(80 * MHZ);
ets_update_cpu_frequency(cpu_freq_mhz);
}
clk_ll_cpu_set_freq_mhz_from_pll(cpu_freq_mhz);
clk_ll_cpu_set_divider(1);
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_PLL);
rtc_clk_apb_freq_update(80 * MHZ);
ets_update_cpu_frequency(cpu_freq_mhz);
if (cpu_freq_mhz < cur_config.freq_mhz) {
if (cur_config.freq_mhz == 240) {
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
esp_rom_delay_us(40);
}
REG_SET_FIELD(RTC_CNTL_DATE_REG, RTC_CNTL_SLAVE_PD, DEFAULT_LDO_SLAVE >> pd_slave);
}
}
@ -361,9 +359,9 @@ void rtc_clk_cpu_freq_set_xtal(void)
*/
static void rtc_clk_cpu_freq_to_xtal(int freq, int div)
{
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
esp_rom_delay_us(40);
rtc_cpu_freq_config_t cur_config;
rtc_clk_cpu_freq_get_config(&cur_config);
ets_update_cpu_frequency(freq);
/* Set divider from XTAL to APB clock. Need to set divider to 1 (reg. value 0) first. */
clk_ll_cpu_set_divider(1);
@ -371,18 +369,25 @@ static void rtc_clk_cpu_freq_to_xtal(int freq, int div)
/* switch clock source */
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_XTAL);
rtc_clk_apb_freq_update(freq * MHZ);
if (cur_config.freq_mhz == 240) {
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
esp_rom_delay_us(40);
}
REG_SET_FIELD(RTC_CNTL_DATE_REG, RTC_CNTL_SLAVE_PD, DEFAULT_LDO_SLAVE);
}
static void rtc_clk_cpu_freq_to_8m(void)
{
assert(0 && "LDO dbias need to modified");
ets_update_cpu_frequency(20);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
esp_rom_delay_us(40);
clk_ll_cpu_set_divider(1);
clk_ll_cpu_set_src(SOC_CPU_CLK_SRC_RC_FAST);
rtc_clk_apb_freq_update(SOC_CLK_RC_FAST_FREQ_APPROX);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_RTC_DREG, g_rtc_dbias_pvt_non_240m);
REGI2C_WRITE_MASK(I2C_DIG_REG, I2C_DIG_REG_EXT_DIG_DREG, g_dig_dbias_pvt_non_240m);
REG_SET_FIELD(RTC_CNTL_DATE_REG, RTC_CNTL_SLAVE_PD, DEFAULT_LDO_SLAVE);
}

3
components/soc/esp32s2/include/soc/rtc.h
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@ -84,7 +84,10 @@ extern "C" {
#define DIG_DBIAS_80M_160M RTC_CNTL_DBIAS_1V10
#endif
#define DIG_DBIAS_240M RTC_CNTL_DBIAS_1V25
#define RTC_DBIAS_240M RTC_CNTL_DBIAS_1V25
#define DIG_DBIAS_XTAL RTC_CNTL_DBIAS_1V10
#define DIG_DBIAS_XTAL_80M_160M RTC_CNTL_DBIAS_1V10
#define RTC_DBIAS_XTAL_80M_160M RTC_CNTL_DBIAS_1V10
#define DIG_DBIAS_2M RTC_CNTL_DBIAS_1V00
#define RTC_CNTL_PLL_BUF_WAIT_DEFAULT 20