/* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #define DIV(div) (div ? (2*div - 1) : 0) #define HALF_DIVIDER(div2x) (div2x ? (div2x - 1) : 0) struct clock_config uart_cfg[] = { { .hz = 1843200, .hw_ctl = 0x0, .src = SRC_GPLL0_MAIN_800MHZ, .div = DIV(0), .m = 36, .n = 15625, .d_2 = 15625, }, { .hz = 3686400, .hw_ctl = 0x0, .src = SRC_GPLL0_MAIN_800MHZ, .div = DIV(0), .m = 72, .n = 15625, .d_2 = 15625, } }; struct clock_config i2c_cfg[] = { { .hz = 19200000, .hw_ctl = 0x0, .src = SRC_XO_19_2MHZ, .div = DIV(0), }, { .hz = 50000000, .hw_ctl = 0x0, .src = SRC_GPLL0_MAIN_800MHZ, .div = DIV(32), } }; struct clock_config spi_cfg[] = { { .hz = 1000000, .hw_ctl = 0x0, .src = SRC_XO_19_2MHZ, .div = DIV(48), }, { .hz = 7372800, .src = SRC_GPLL0_MAIN_800MHZ, .div = DIV(1), .m = 144, .n = 15625, .d_2 = 15625, }, { .hz = 19200000, .hw_ctl = 0x0, .src = SRC_XO_19_2MHZ, .div = DIV(0), }, { .hz = 30000000, .hw_ctl = 0x0, .src = SRC_XO_19_2MHZ, .div = DIV(0), }, { .hz = 50000000, .hw_ctl = 0x0, .src = SRC_GPLL0_MAIN_800MHZ, .div = DIV(32), } }; static int clock_configure_gpll0(void) { /* Keep existing GPLL0 configuration, in RUN mode @800Mhz. */ setbits32(&gcc->gpll0.user_ctl, 1 << CLK_CTL_GPLL_PLLOUT_LV_EARLY_SHFT | 1 << CLK_CTL_GPLL_PLLOUT_AUX2_SHFT | 1 << CLK_CTL_GPLL_PLLOUT_AUX_SHFT | 1 << CLK_CTL_GPLL_PLLOUT_MAIN_SHFT); return 0; } static int clock_configure_mnd(struct qcs405_clock *clk, uint32_t m, uint32_t n, uint32_t d_2) { uint32_t reg_val; /* Configure Root Clock Generator(RCG) for Dual Edge Mode */ reg_val = read32(&clk->rcg.cfg); reg_val |= (2 << CLK_CTL_CFG_MODE_SHFT); write32(&clk->rcg.cfg, reg_val); /* Set M/N/D config */ write32(&clk->m, m & CLK_CTL_RCG_MND_BMSK); write32(&clk->n, ~(n-m) & CLK_CTL_RCG_MND_BMSK); write32(&clk->d_2, ~(d_2) & CLK_CTL_RCG_MND_BMSK); return 0; } static int clock_configure(struct qcs405_clock *clk, struct clock_config *clk_cfg, uint32_t hz, uint32_t num_perfs) { uint32_t reg_val; uint32_t idx; for (idx = 0; idx < num_perfs; idx++) if (hz <= clk_cfg[idx].hz) break; reg_val = (clk_cfg[idx].src << CLK_CTL_CFG_SRC_SEL_SHFT) | (clk_cfg[idx].div << CLK_CTL_CFG_SRC_DIV_SHFT); /* Set clock config */ write32(&clk->rcg.cfg, reg_val); if (clk_cfg[idx].m != 0) clock_configure_mnd(clk, clk_cfg[idx].m, clk_cfg[idx].n, clk_cfg[idx].d_2); /* Commit config to RCG*/ setbits32(&clk->rcg.cmd, BIT(CLK_CTL_CMD_UPDATE_SHFT)); return 0; } static bool clock_is_off(void *cbcr_addr) { return (read32(cbcr_addr) & CLK_CTL_CBC_CLK_OFF_BMSK); } static int clock_enable_vote(void *cbcr_addr, void *vote_addr, uint32_t vote_bit) { /* Set clock vote bit */ setbits32(vote_addr, BIT(vote_bit)); /* Ensure clock is enabled */ while (clock_is_off(cbcr_addr)); return 0; } static int clock_enable(void *cbcr_addr) { /* Set clock enable bit */ setbits32(cbcr_addr, BIT(CLK_CTL_CBC_CLK_EN_SHFT)); /* Ensure clock is enabled */ while (clock_is_off(cbcr_addr)) ; return 0; } static int clock_disable(void *cbcr_addr) { /* Set clock enable bit */ clrbits32(cbcr_addr, BIT(CLK_CTL_CBC_CLK_EN_SHFT)); return 0; } int clock_reset_bcr(void *bcr_addr, bool reset) { struct qcs405_bcr *bcr = bcr_addr; if (reset) setbits32(&bcr->bcr, BIT(CLK_CTL_BCR_BLK_ARES_SHFT)); else clrbits32(&bcr->bcr, BIT(CLK_CTL_BCR_BLK_ARES_SHFT)); return 0; } void clock_configure_uart(uint32_t hz) { struct qcs405_clock *uart_clk = (struct qcs405_clock *) &gcc->blsp1_uart2_apps_clk; clock_configure(uart_clk, uart_cfg, hz, ARRAY_SIZE(uart_cfg)); } void clock_configure_spi(int blsp, int qup, uint32_t hz) { struct qcs405_clock *spi_clk = 0; if (blsp == 1) { switch (qup) { case 0: spi_clk = (struct qcs405_clock *) &gcc->blsp1_qup0_spi_clk; break; case 1: spi_clk = (struct qcs405_clock *) &gcc->blsp1_qup1_spi_clk; break; case 2: spi_clk = (struct qcs405_clock *) &gcc->blsp1_qup2_spi_clk; break; case 3: spi_clk = (struct qcs405_clock *) &gcc->blsp1_qup3_spi_clk; break; case 4: spi_clk = (struct qcs405_clock *) &gcc->blsp1_qup4_spi_clk; break; default: printk(BIOS_ERR, "Invalid QUP %d\n", qup); return; } } else if (blsp == 2) { spi_clk = (struct qcs405_clock *)&gcc->blsp2_qup0_spi_clk; } else { printk(BIOS_ERR, "BLSP %d not supported\n", blsp); return; } clock_configure(spi_clk, spi_cfg, hz, ARRAY_SIZE(spi_cfg)); } void clock_configure_i2c(uint32_t hz) { struct qcs405_clock *i2c_clk = (struct qcs405_clock *)&gcc->blsp1_qup1_i2c_clk; clock_configure(i2c_clk, i2c_cfg, hz, ARRAY_SIZE(i2c_cfg)); } void clock_enable_uart(void) { clock_enable(&gcc->blsp1_uart2_apps_cbcr); } void clock_disable_uart(void) { clock_disable(&gcc->blsp1_uart2_apps_cbcr); } void clock_enable_spi(int blsp, int qup) { if (blsp == 1) { switch (qup) { case 0: clock_enable(&gcc->blsp1_qup0_spi_apps_cbcr); break; case 1: clock_enable(&gcc->blsp1_qup1_spi_apps_cbcr); break; case 2: clock_enable(&gcc->blsp1_qup2_spi_apps_cbcr); break; case 3: clock_enable(&gcc->blsp1_qup3_spi_apps_cbcr); break; case 4: clock_enable(&gcc->blsp1_qup4_spi_apps_cbcr); break; } } else if (blsp == 2) clock_enable(&gcc->blsp2_qup0_spi_apps_cbcr); else printk(BIOS_ERR, "BLSP%d not supported\n", blsp); } void clock_disable_spi(int blsp, int qup) { if (blsp == 1) { switch (qup) { case 0: clock_enable(&gcc->blsp1_qup0_spi_apps_cbcr); break; case 1: clock_enable(&gcc->blsp1_qup1_spi_apps_cbcr); break; case 2: clock_enable(&gcc->blsp1_qup2_spi_apps_cbcr); break; case 3: clock_enable(&gcc->blsp1_qup3_spi_apps_cbcr); break; case 4: clock_enable(&gcc->blsp1_qup4_spi_apps_cbcr); break; } } else if (blsp == 2) clock_enable(&gcc->blsp2_qup0_spi_apps_cbcr); else printk(BIOS_ERR, "BLSP%d not supported\n", blsp); } void clock_enable_i2c(void) { clock_enable(&gcc->blsp1_qup1_i2c_apps_cbcr); } void clock_disable_i2c(void) { clock_disable(&gcc->blsp1_qup1_i2c_apps_cbcr); } void clock_init(void) { clock_configure_gpll0(); clock_enable_vote(&gcc->blsp1_ahb_cbcr, &gcc->gcc_apcs_clock_branch_en_vote, BLSP1_AHB_CLK_ENA); clock_enable_vote(&gcc->blsp2_ahb_cbcr, &gcc->gcc_apcs_clock_branch_en_vote, BLSP2_AHB_CLK_ENA); }