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Diffstat (limited to 'arch/arm/cpu/armv7/socfpga/clock_manager.c')
-rw-r--r--arch/arm/cpu/armv7/socfpga/clock_manager.c560
1 files changed, 0 insertions, 560 deletions
diff --git a/arch/arm/cpu/armv7/socfpga/clock_manager.c b/arch/arm/cpu/armv7/socfpga/clock_manager.c
deleted file mode 100644
index fa3b93a257..0000000000
--- a/arch/arm/cpu/armv7/socfpga/clock_manager.c
+++ /dev/null
@@ -1,560 +0,0 @@
-/*
- * Copyright (C) 2013 Altera Corporation <www.altera.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/arch/clock_manager.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-static const struct socfpga_clock_manager *clock_manager_base =
- (struct socfpga_clock_manager *)SOCFPGA_CLKMGR_ADDRESS;
-
-static void cm_wait_for_lock(uint32_t mask)
-{
- register uint32_t inter_val;
- uint32_t retry = 0;
- do {
- inter_val = readl(&clock_manager_base->inter) & mask;
- if (inter_val == mask)
- retry++;
- else
- retry = 0;
- if (retry >= 10)
- break;
- } while (1);
-}
-
-/* function to poll in the fsm busy bit */
-static void cm_wait_for_fsm(void)
-{
- while (readl(&clock_manager_base->stat) & CLKMGR_STAT_BUSY)
- ;
-}
-
-/*
- * function to write the bypass register which requires a poll of the
- * busy bit
- */
-static void cm_write_bypass(uint32_t val)
-{
- writel(val, &clock_manager_base->bypass);
- cm_wait_for_fsm();
-}
-
-/* function to write the ctrl register which requires a poll of the busy bit */
-static void cm_write_ctrl(uint32_t val)
-{
- writel(val, &clock_manager_base->ctrl);
- cm_wait_for_fsm();
-}
-
-/* function to write a clock register that has phase information */
-static void cm_write_with_phase(uint32_t value,
- uint32_t reg_address, uint32_t mask)
-{
- /* poll until phase is zero */
- while (readl(reg_address) & mask)
- ;
-
- writel(value, reg_address);
-
- while (readl(reg_address) & mask)
- ;
-}
-
-/*
- * Setup clocks while making no assumptions about previous state of the clocks.
- *
- * Start by being paranoid and gate all sw managed clocks
- * Put all plls in bypass
- * Put all plls VCO registers back to reset value (bandgap power down).
- * Put peripheral and main pll src to reset value to avoid glitch.
- * Delay 5 us.
- * Deassert bandgap power down and set numerator and denominator
- * Start 7 us timer.
- * set internal dividers
- * Wait for 7 us timer.
- * Enable plls
- * Set external dividers while plls are locking
- * Wait for pll lock
- * Assert/deassert outreset all.
- * Take all pll's out of bypass
- * Clear safe mode
- * set source main and peripheral clocks
- * Ungate clocks
- */
-
-void cm_basic_init(const cm_config_t *cfg)
-{
- uint32_t start, timeout;
-
- /* Start by being paranoid and gate all sw managed clocks */
-
- /*
- * We need to disable nandclk
- * and then do another apb access before disabling
- * gatting off the rest of the periperal clocks.
- */
- writel(~CLKMGR_PERPLLGRP_EN_NANDCLK_MASK &
- readl(&clock_manager_base->per_pll.en),
- &clock_manager_base->per_pll.en);
-
- /* DO NOT GATE OFF DEBUG CLOCKS & BRIDGE CLOCKS */
- writel(CLKMGR_MAINPLLGRP_EN_DBGTIMERCLK_MASK |
- CLKMGR_MAINPLLGRP_EN_DBGTRACECLK_MASK |
- CLKMGR_MAINPLLGRP_EN_DBGCLK_MASK |
- CLKMGR_MAINPLLGRP_EN_DBGATCLK_MASK |
- CLKMGR_MAINPLLGRP_EN_S2FUSER0CLK_MASK |
- CLKMGR_MAINPLLGRP_EN_L4MPCLK_MASK,
- &clock_manager_base->main_pll.en);
-
- writel(0, &clock_manager_base->sdr_pll.en);
-
- /* now we can gate off the rest of the peripheral clocks */
- writel(0, &clock_manager_base->per_pll.en);
-
- /* Put all plls in bypass */
- cm_write_bypass(CLKMGR_BYPASS_PERPLL | CLKMGR_BYPASS_SDRPLL |
- CLKMGR_BYPASS_MAINPLL);
-
- /* Put all plls VCO registers back to reset value. */
- writel(CLKMGR_MAINPLLGRP_VCO_RESET_VALUE &
- ~CLKMGR_MAINPLLGRP_VCO_REGEXTSEL_MASK,
- &clock_manager_base->main_pll.vco);
- writel(CLKMGR_PERPLLGRP_VCO_RESET_VALUE &
- ~CLKMGR_PERPLLGRP_VCO_REGEXTSEL_MASK,
- &clock_manager_base->per_pll.vco);
- writel(CLKMGR_SDRPLLGRP_VCO_RESET_VALUE &
- ~CLKMGR_SDRPLLGRP_VCO_REGEXTSEL_MASK,
- &clock_manager_base->sdr_pll.vco);
-
- /*
- * The clocks to the flash devices and the L4_MAIN clocks can
- * glitch when coming out of safe mode if their source values
- * are different from their reset value. So the trick it to
- * put them back to their reset state, and change input
- * after exiting safe mode but before ungating the clocks.
- */
- writel(CLKMGR_PERPLLGRP_SRC_RESET_VALUE,
- &clock_manager_base->per_pll.src);
- writel(CLKMGR_MAINPLLGRP_L4SRC_RESET_VALUE,
- &clock_manager_base->main_pll.l4src);
-
- /* read back for the required 5 us delay. */
- readl(&clock_manager_base->main_pll.vco);
- readl(&clock_manager_base->per_pll.vco);
- readl(&clock_manager_base->sdr_pll.vco);
-
-
- /*
- * We made sure bgpwr down was assert for 5 us. Now deassert BG PWR DN
- * with numerator and denominator.
- */
- writel(cfg->main_vco_base, &clock_manager_base->main_pll.vco);
- writel(cfg->peri_vco_base, &clock_manager_base->per_pll.vco);
- writel(cfg->sdram_vco_base, &clock_manager_base->sdr_pll.vco);
-
- /*
- * Time starts here
- * must wait 7 us from BGPWRDN_SET(0) to VCO_ENABLE_SET(1)
- */
- start = get_timer(0);
- /* timeout in unit of us as CONFIG_SYS_HZ = 1000*1000 */
- timeout = 7;
-
- /* main mpu */
- writel(cfg->mpuclk, &clock_manager_base->main_pll.mpuclk);
-
- /* main main clock */
- writel(cfg->mainclk, &clock_manager_base->main_pll.mainclk);
-
- /* main for dbg */
- writel(cfg->dbgatclk, &clock_manager_base->main_pll.dbgatclk);
-
- /* main for cfgs2fuser0clk */
- writel(cfg->cfg2fuser0clk,
- &clock_manager_base->main_pll.cfgs2fuser0clk);
-
- /* Peri emac0 50 MHz default to RMII */
- writel(cfg->emac0clk, &clock_manager_base->per_pll.emac0clk);
-
- /* Peri emac1 50 MHz default to RMII */
- writel(cfg->emac1clk, &clock_manager_base->per_pll.emac1clk);
-
- /* Peri QSPI */
- writel(cfg->mainqspiclk, &clock_manager_base->main_pll.mainqspiclk);
-
- writel(cfg->perqspiclk, &clock_manager_base->per_pll.perqspiclk);
-
- /* Peri pernandsdmmcclk */
- writel(cfg->mainnandsdmmcclk,
- &clock_manager_base->main_pll.mainnandsdmmcclk);
-
- writel(cfg->pernandsdmmcclk,
- &clock_manager_base->per_pll.pernandsdmmcclk);
-
- /* Peri perbaseclk */
- writel(cfg->perbaseclk, &clock_manager_base->per_pll.perbaseclk);
-
- /* Peri s2fuser1clk */
- writel(cfg->s2fuser1clk, &clock_manager_base->per_pll.s2fuser1clk);
-
- /* 7 us must have elapsed before we can enable the VCO */
- while (get_timer(start) < timeout)
- ;
-
- /* Enable vco */
- /* main pll vco */
- writel(cfg->main_vco_base | CLKMGR_MAINPLLGRP_VCO_EN,
- &clock_manager_base->main_pll.vco);
-
- /* periferal pll */
- writel(cfg->peri_vco_base | CLKMGR_MAINPLLGRP_VCO_EN,
- &clock_manager_base->per_pll.vco);
-
- /* sdram pll vco */
- writel(cfg->sdram_vco_base | CLKMGR_MAINPLLGRP_VCO_EN,
- &clock_manager_base->sdr_pll.vco);
-
- /* L3 MP and L3 SP */
- writel(cfg->maindiv, &clock_manager_base->main_pll.maindiv);
-
- writel(cfg->dbgdiv, &clock_manager_base->main_pll.dbgdiv);
-
- writel(cfg->tracediv, &clock_manager_base->main_pll.tracediv);
-
- /* L4 MP, L4 SP, can0, and can1 */
- writel(cfg->perdiv, &clock_manager_base->per_pll.div);
-
- writel(cfg->gpiodiv, &clock_manager_base->per_pll.gpiodiv);
-
-#define LOCKED_MASK \
- (CLKMGR_INTER_SDRPLLLOCKED_MASK | \
- CLKMGR_INTER_PERPLLLOCKED_MASK | \
- CLKMGR_INTER_MAINPLLLOCKED_MASK)
-
- cm_wait_for_lock(LOCKED_MASK);
-
- /* write the sdram clock counters before toggling outreset all */
- writel(cfg->ddrdqsclk & CLKMGR_SDRPLLGRP_DDRDQSCLK_CNT_MASK,
- &clock_manager_base->sdr_pll.ddrdqsclk);
-
- writel(cfg->ddr2xdqsclk & CLKMGR_SDRPLLGRP_DDR2XDQSCLK_CNT_MASK,
- &clock_manager_base->sdr_pll.ddr2xdqsclk);
-
- writel(cfg->ddrdqclk & CLKMGR_SDRPLLGRP_DDRDQCLK_CNT_MASK,
- &clock_manager_base->sdr_pll.ddrdqclk);
-
- writel(cfg->s2fuser2clk & CLKMGR_SDRPLLGRP_S2FUSER2CLK_CNT_MASK,
- &clock_manager_base->sdr_pll.s2fuser2clk);
-
- /*
- * after locking, but before taking out of bypass
- * assert/deassert outresetall
- */
- uint32_t mainvco = readl(&clock_manager_base->main_pll.vco);
-
- /* assert main outresetall */
- writel(mainvco | CLKMGR_MAINPLLGRP_VCO_OUTRESETALL_MASK,
- &clock_manager_base->main_pll.vco);
-
- uint32_t periphvco = readl(&clock_manager_base->per_pll.vco);
-
- /* assert pheriph outresetall */
- writel(periphvco | CLKMGR_PERPLLGRP_VCO_OUTRESETALL_MASK,
- &clock_manager_base->per_pll.vco);
-
- /* assert sdram outresetall */
- writel(cfg->sdram_vco_base | CLKMGR_MAINPLLGRP_VCO_EN|
- CLKMGR_SDRPLLGRP_VCO_OUTRESETALL,
- &clock_manager_base->sdr_pll.vco);
-
- /* deassert main outresetall */
- writel(mainvco & ~CLKMGR_MAINPLLGRP_VCO_OUTRESETALL_MASK,
- &clock_manager_base->main_pll.vco);
-
- /* deassert pheriph outresetall */
- writel(periphvco & ~CLKMGR_PERPLLGRP_VCO_OUTRESETALL_MASK,
- &clock_manager_base->per_pll.vco);
-
- /* deassert sdram outresetall */
- writel(cfg->sdram_vco_base | CLKMGR_MAINPLLGRP_VCO_EN,
- &clock_manager_base->sdr_pll.vco);
-
- /*
- * now that we've toggled outreset all, all the clocks
- * are aligned nicely; so we can change any phase.
- */
- cm_write_with_phase(cfg->ddrdqsclk,
- (uint32_t)&clock_manager_base->sdr_pll.ddrdqsclk,
- CLKMGR_SDRPLLGRP_DDRDQSCLK_PHASE_MASK);
-
- /* SDRAM DDR2XDQSCLK */
- cm_write_with_phase(cfg->ddr2xdqsclk,
- (uint32_t)&clock_manager_base->sdr_pll.ddr2xdqsclk,
- CLKMGR_SDRPLLGRP_DDR2XDQSCLK_PHASE_MASK);
-
- cm_write_with_phase(cfg->ddrdqclk,
- (uint32_t)&clock_manager_base->sdr_pll.ddrdqclk,
- CLKMGR_SDRPLLGRP_DDRDQCLK_PHASE_MASK);
-
- cm_write_with_phase(cfg->s2fuser2clk,
- (uint32_t)&clock_manager_base->sdr_pll.s2fuser2clk,
- CLKMGR_SDRPLLGRP_S2FUSER2CLK_PHASE_MASK);
-
- /* Take all three PLLs out of bypass when safe mode is cleared. */
- cm_write_bypass(0);
-
- /* clear safe mode */
- cm_write_ctrl(readl(&clock_manager_base->ctrl) | CLKMGR_CTRL_SAFEMODE);
-
- /*
- * now that safe mode is clear with clocks gated
- * it safe to change the source mux for the flashes the the L4_MAIN
- */
- writel(cfg->persrc, &clock_manager_base->per_pll.src);
- writel(cfg->l4src, &clock_manager_base->main_pll.l4src);
-
- /* Now ungate non-hw-managed clocks */
- writel(~0, &clock_manager_base->main_pll.en);
- writel(~0, &clock_manager_base->per_pll.en);
- writel(~0, &clock_manager_base->sdr_pll.en);
-
- /* Clear the loss of lock bits (write 1 to clear) */
- writel(CLKMGR_INTER_SDRPLLLOST_MASK | CLKMGR_INTER_PERPLLLOST_MASK |
- CLKMGR_INTER_MAINPLLLOST_MASK,
- &clock_manager_base->inter);
-}
-
-static unsigned int cm_get_main_vco_clk_hz(void)
-{
- uint32_t reg, clock;
-
- /* get the main VCO clock */
- reg = readl(&clock_manager_base->main_pll.vco);
- clock = CONFIG_HPS_CLK_OSC1_HZ;
- clock /= ((reg & CLKMGR_MAINPLLGRP_VCO_DENOM_MASK) >>
- CLKMGR_MAINPLLGRP_VCO_DENOM_OFFSET) + 1;
- clock *= ((reg & CLKMGR_MAINPLLGRP_VCO_NUMER_MASK) >>
- CLKMGR_MAINPLLGRP_VCO_NUMER_OFFSET) + 1;
-
- return clock;
-}
-
-static unsigned int cm_get_per_vco_clk_hz(void)
-{
- uint32_t reg, clock = 0;
-
- /* identify PER PLL clock source */
- reg = readl(&clock_manager_base->per_pll.vco);
- reg = (reg & CLKMGR_PERPLLGRP_VCO_SSRC_MASK) >>
- CLKMGR_PERPLLGRP_VCO_SSRC_OFFSET;
- if (reg == CLKMGR_VCO_SSRC_EOSC1)
- clock = CONFIG_HPS_CLK_OSC1_HZ;
- else if (reg == CLKMGR_VCO_SSRC_EOSC2)
- clock = CONFIG_HPS_CLK_OSC2_HZ;
- else if (reg == CLKMGR_VCO_SSRC_F2S)
- clock = CONFIG_HPS_CLK_F2S_PER_REF_HZ;
-
- /* get the PER VCO clock */
- reg = readl(&clock_manager_base->per_pll.vco);
- clock /= ((reg & CLKMGR_PERPLLGRP_VCO_DENOM_MASK) >>
- CLKMGR_PERPLLGRP_VCO_DENOM_OFFSET) + 1;
- clock *= ((reg & CLKMGR_PERPLLGRP_VCO_NUMER_MASK) >>
- CLKMGR_PERPLLGRP_VCO_NUMER_OFFSET) + 1;
-
- return clock;
-}
-
-unsigned long cm_get_mpu_clk_hz(void)
-{
- uint32_t reg, clock;
-
- clock = cm_get_main_vco_clk_hz();
-
- /* get the MPU clock */
- reg = readl(&clock_manager_base->altera.mpuclk);
- clock /= (reg + 1);
- reg = readl(&clock_manager_base->main_pll.mpuclk);
- clock /= (reg + 1);
- return clock;
-}
-
-unsigned long cm_get_sdram_clk_hz(void)
-{
- uint32_t reg, clock = 0;
-
- /* identify SDRAM PLL clock source */
- reg = readl(&clock_manager_base->sdr_pll.vco);
- reg = (reg & CLKMGR_SDRPLLGRP_VCO_SSRC_MASK) >>
- CLKMGR_SDRPLLGRP_VCO_SSRC_OFFSET;
- if (reg == CLKMGR_VCO_SSRC_EOSC1)
- clock = CONFIG_HPS_CLK_OSC1_HZ;
- else if (reg == CLKMGR_VCO_SSRC_EOSC2)
- clock = CONFIG_HPS_CLK_OSC2_HZ;
- else if (reg == CLKMGR_VCO_SSRC_F2S)
- clock = CONFIG_HPS_CLK_F2S_SDR_REF_HZ;
-
- /* get the SDRAM VCO clock */
- reg = readl(&clock_manager_base->sdr_pll.vco);
- clock /= ((reg & CLKMGR_SDRPLLGRP_VCO_DENOM_MASK) >>
- CLKMGR_SDRPLLGRP_VCO_DENOM_OFFSET) + 1;
- clock *= ((reg & CLKMGR_SDRPLLGRP_VCO_NUMER_MASK) >>
- CLKMGR_SDRPLLGRP_VCO_NUMER_OFFSET) + 1;
-
- /* get the SDRAM (DDR_DQS) clock */
- reg = readl(&clock_manager_base->sdr_pll.ddrdqsclk);
- reg = (reg & CLKMGR_SDRPLLGRP_DDRDQSCLK_CNT_MASK) >>
- CLKMGR_SDRPLLGRP_DDRDQSCLK_CNT_OFFSET;
- clock /= (reg + 1);
-
- return clock;
-}
-
-unsigned int cm_get_l4_sp_clk_hz(void)
-{
- uint32_t reg, clock = 0;
-
- /* identify the source of L4 SP clock */
- reg = readl(&clock_manager_base->main_pll.l4src);
- reg = (reg & CLKMGR_MAINPLLGRP_L4SRC_L4SP) >>
- CLKMGR_MAINPLLGRP_L4SRC_L4SP_OFFSET;
-
- if (reg == CLKMGR_L4_SP_CLK_SRC_MAINPLL) {
- clock = cm_get_main_vco_clk_hz();
-
- /* get the clock prior L4 SP divider (main clk) */
- reg = readl(&clock_manager_base->altera.mainclk);
- clock /= (reg + 1);
- reg = readl(&clock_manager_base->main_pll.mainclk);
- clock /= (reg + 1);
- } else if (reg == CLKMGR_L4_SP_CLK_SRC_PERPLL) {
- clock = cm_get_per_vco_clk_hz();
-
- /* get the clock prior L4 SP divider (periph_base_clk) */
- reg = readl(&clock_manager_base->per_pll.perbaseclk);
- clock /= (reg + 1);
- }
-
- /* get the L4 SP clock which supplied to UART */
- reg = readl(&clock_manager_base->main_pll.maindiv);
- reg = (reg & CLKMGR_MAINPLLGRP_MAINDIV_L4SPCLK_MASK) >>
- CLKMGR_MAINPLLGRP_MAINDIV_L4SPCLK_OFFSET;
- clock = clock / (1 << reg);
-
- return clock;
-}
-
-unsigned int cm_get_mmc_controller_clk_hz(void)
-{
- uint32_t reg, clock = 0;
-
- /* identify the source of MMC clock */
- reg = readl(&clock_manager_base->per_pll.src);
- reg = (reg & CLKMGR_PERPLLGRP_SRC_SDMMC_MASK) >>
- CLKMGR_PERPLLGRP_SRC_SDMMC_OFFSET;
-
- if (reg == CLKMGR_SDMMC_CLK_SRC_F2S) {
- clock = CONFIG_HPS_CLK_F2S_PER_REF_HZ;
- } else if (reg == CLKMGR_SDMMC_CLK_SRC_MAIN) {
- clock = cm_get_main_vco_clk_hz();
-
- /* get the SDMMC clock */
- reg = readl(&clock_manager_base->main_pll.mainnandsdmmcclk);
- clock /= (reg + 1);
- } else if (reg == CLKMGR_SDMMC_CLK_SRC_PER) {
- clock = cm_get_per_vco_clk_hz();
-
- /* get the SDMMC clock */
- reg = readl(&clock_manager_base->per_pll.pernandsdmmcclk);
- clock /= (reg + 1);
- }
-
- /* further divide by 4 as we have fixed divider at wrapper */
- clock /= 4;
- return clock;
-}
-
-unsigned int cm_get_qspi_controller_clk_hz(void)
-{
- uint32_t reg, clock = 0;
-
- /* identify the source of QSPI clock */
- reg = readl(&clock_manager_base->per_pll.src);
- reg = (reg & CLKMGR_PERPLLGRP_SRC_QSPI_MASK) >>
- CLKMGR_PERPLLGRP_SRC_QSPI_OFFSET;
-
- if (reg == CLKMGR_QSPI_CLK_SRC_F2S) {
- clock = CONFIG_HPS_CLK_F2S_PER_REF_HZ;
- } else if (reg == CLKMGR_QSPI_CLK_SRC_MAIN) {
- clock = cm_get_main_vco_clk_hz();
-
- /* get the qspi clock */
- reg = readl(&clock_manager_base->main_pll.mainqspiclk);
- clock /= (reg + 1);
- } else if (reg == CLKMGR_QSPI_CLK_SRC_PER) {
- clock = cm_get_per_vco_clk_hz();
-
- /* get the qspi clock */
- reg = readl(&clock_manager_base->per_pll.perqspiclk);
- clock /= (reg + 1);
- }
-
- return clock;
-}
-
-unsigned int cm_get_spi_controller_clk_hz(void)
-{
- uint32_t reg, clock = 0;
-
- clock = cm_get_per_vco_clk_hz();
-
- /* get the clock prior L4 SP divider (periph_base_clk) */
- reg = readl(&clock_manager_base->per_pll.perbaseclk);
- clock /= (reg + 1);
-
- return clock;
-}
-
-static void cm_print_clock_quick_summary(void)
-{
- printf("MPU %10ld kHz\n", cm_get_mpu_clk_hz() / 1000);
- printf("DDR %10ld kHz\n", cm_get_sdram_clk_hz() / 1000);
- printf("EOSC1 %8d kHz\n", CONFIG_HPS_CLK_OSC1_HZ / 1000);
- printf("EOSC2 %8d kHz\n", CONFIG_HPS_CLK_OSC2_HZ / 1000);
- printf("F2S_SDR_REF %8d kHz\n", CONFIG_HPS_CLK_F2S_SDR_REF_HZ / 1000);
- printf("F2S_PER_REF %8d kHz\n", CONFIG_HPS_CLK_F2S_PER_REF_HZ / 1000);
- printf("MMC %8d kHz\n", cm_get_mmc_controller_clk_hz() / 1000);
- printf("QSPI %8d kHz\n", cm_get_qspi_controller_clk_hz() / 1000);
- printf("UART %8d kHz\n", cm_get_l4_sp_clk_hz() / 1000);
- printf("SPI %8d kHz\n", cm_get_spi_controller_clk_hz() / 1000);
-}
-
-int set_cpu_clk_info(void)
-{
- /* Calculate the clock frequencies required for drivers */
- cm_get_l4_sp_clk_hz();
- cm_get_mmc_controller_clk_hz();
-
- gd->bd->bi_arm_freq = cm_get_mpu_clk_hz() / 1000000;
- gd->bd->bi_dsp_freq = 0;
- gd->bd->bi_ddr_freq = cm_get_sdram_clk_hz() / 1000000;
-
- return 0;
-}
-
-int do_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
- cm_print_clock_quick_summary();
- return 0;
-}
-
-U_BOOT_CMD(
- clocks, CONFIG_SYS_MAXARGS, 1, do_showclocks,
- "display clocks",
- ""
-);
generated by cgit (git 2.34.1) at 2025-01-07 20:44:26 +0000