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Diffstat (limited to 'arch/arm/mach-imx/imx8m/clock_imx8mm.c')
-rw-r--r--arch/arm/mach-imx/imx8m/clock_imx8mm.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8m/clock_imx8mm.c b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
new file mode 100644
index 00000000000..ee44ba75feb
--- /dev/null
+++ b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
@@ -0,0 +1,306 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018-2019 NXP
+ *
+ * Peng Fan <peng.fan@nxp.com>
+ */
+
+#include <common.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
+#include <clk.h>
+#include <clk-uclass.h>
+#include <dt-bindings/clock/imx8mm-clock.h>
+#include <div64.h>
+#include <errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR;
+
+void enable_ocotp_clk(unsigned char enable)
+{
+ struct clk *clkp;
+ int ret;
+
+ ret = clk_get_by_id(IMX8MM_CLK_OCOTP_ROOT, &clkp);
+ if (ret) {
+ printf("%s: err: %d\n", __func__, ret);
+ return;
+ }
+
+ enable ? clk_enable(clkp) : clk_disable(clkp);
+}
+
+int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
+{
+ struct clk *clkp;
+ int ret;
+
+ ret = clk_get_by_id(IMX8MM_CLK_I2C1_ROOT + i2c_num, &clkp);
+ if (ret) {
+ printf("%s: err: %d\n", __func__, ret);
+ return ret;
+ }
+
+ return enable ? clk_enable(clkp) : clk_disable(clkp);
+}
+
+#ifdef CONFIG_SPL_BUILD
+static struct imx_int_pll_rate_table imx8mm_fracpll_tbl[] = {
+ PLL_1443X_RATE(800000000U, 300, 9, 0, 0),
+ PLL_1443X_RATE(750000000U, 250, 8, 0, 0),
+ PLL_1443X_RATE(650000000U, 325, 3, 2, 0),
+ PLL_1443X_RATE(600000000U, 300, 3, 2, 0),
+ PLL_1443X_RATE(594000000U, 99, 1, 2, 0),
+ PLL_1443X_RATE(400000000U, 300, 9, 1, 0),
+ PLL_1443X_RATE(266666667U, 400, 9, 2, 0),
+ PLL_1443X_RATE(167000000U, 334, 3, 4, 0),
+ PLL_1443X_RATE(100000000U, 300, 9, 3, 0),
+};
+
+int fracpll_configure(enum pll_clocks pll, u32 freq)
+{
+ int i;
+ u32 tmp, div_val;
+ void *pll_base;
+ struct imx_int_pll_rate_table *rate;
+
+ for (i = 0; i < ARRAY_SIZE(imx8mm_fracpll_tbl); i++) {
+ if (freq == imx8mm_fracpll_tbl[i].rate)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(imx8mm_fracpll_tbl)) {
+ printf("No matched freq table %u\n", freq);
+ return -EINVAL;
+ }
+
+ rate = &imx8mm_fracpll_tbl[i];
+
+ switch (pll) {
+ case ANATOP_DRAM_PLL:
+ setbits_le32(GPC_BASE_ADDR + 0xEC, 1 << 7);
+ setbits_le32(GPC_BASE_ADDR + 0xF8, 1 << 5);
+ writel(SRC_DDR1_ENABLE_MASK, SRC_BASE_ADDR + 0x1004);
+
+ pll_base = &ana_pll->dram_pll_gnrl_ctl;
+ break;
+ case ANATOP_VIDEO_PLL:
+ pll_base = &ana_pll->video_pll1_gnrl_ctl;
+ break;
+ default:
+ return 0;
+ }
+ /* Bypass clock and set lock to pll output lock */
+ tmp = readl(pll_base);
+ tmp |= BYPASS_MASK;
+ writel(tmp, pll_base);
+
+ /* Enable RST */
+ tmp &= ~RST_MASK;
+ writel(tmp, pll_base);
+
+ div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) |
+ (rate->sdiv << SDIV_SHIFT);
+ writel(div_val, pll_base + 4);
+ writel(rate->kdiv << KDIV_SHIFT, pll_base + 8);
+
+ __udelay(100);
+
+ /* Disable RST */
+ tmp |= RST_MASK;
+ writel(tmp, pll_base);
+
+ /* Wait Lock*/
+ while (!(readl(pll_base) & LOCK_STATUS))
+ ;
+
+ /* Bypass */
+ tmp &= ~BYPASS_MASK;
+ writel(tmp, pll_base);
+
+ return 0;
+}
+
+void dram_pll_init(ulong pll_val)
+{
+ fracpll_configure(ANATOP_DRAM_PLL, pll_val);
+}
+
+static struct dram_bypass_clk_setting imx8mm_dram_bypass_tbl[] = {
+ DRAM_BYPASS_ROOT_CONFIG(MHZ(100), 2, CLK_ROOT_PRE_DIV1, 2,
+ CLK_ROOT_PRE_DIV2),
+ DRAM_BYPASS_ROOT_CONFIG(MHZ(250), 3, CLK_ROOT_PRE_DIV2, 2,
+ CLK_ROOT_PRE_DIV2),
+ DRAM_BYPASS_ROOT_CONFIG(MHZ(400), 1, CLK_ROOT_PRE_DIV2, 3,
+ CLK_ROOT_PRE_DIV2),
+};
+
+void dram_enable_bypass(ulong clk_val)
+{
+ int i;
+ struct dram_bypass_clk_setting *config;
+
+ for (i = 0; i < ARRAY_SIZE(imx8mm_dram_bypass_tbl); i++) {
+ if (clk_val == imx8mm_dram_bypass_tbl[i].clk)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(imx8mm_dram_bypass_tbl)) {
+ printf("No matched freq table %lu\n", clk_val);
+ return;
+ }
+
+ config = &imx8mm_dram_bypass_tbl[i];
+
+ clock_set_target_val(DRAM_ALT_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(config->alt_root_sel) |
+ CLK_ROOT_PRE_DIV(config->alt_pre_div));
+ clock_set_target_val(DRAM_APB_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(config->apb_root_sel) |
+ CLK_ROOT_PRE_DIV(config->apb_pre_div));
+ clock_set_target_val(DRAM_SEL_CFG, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(1));
+}
+
+void dram_disable_bypass(void)
+{
+ clock_set_target_val(DRAM_SEL_CFG, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(0));
+ clock_set_target_val(DRAM_APB_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(4) |
+ CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV5));
+}
+#endif
+
+void init_uart_clk(u32 index)
+{
+ /*
+ * set uart clock root
+ * 24M OSC
+ */
+ switch (index) {
+ case 0:
+ clock_enable(CCGR_UART1, 0);
+ clock_set_target_val(UART1_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(0));
+ clock_enable(CCGR_UART1, 1);
+ return;
+ case 1:
+ clock_enable(CCGR_UART2, 0);
+ clock_set_target_val(UART2_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(0));
+ clock_enable(CCGR_UART2, 1);
+ return;
+ case 2:
+ clock_enable(CCGR_UART3, 0);
+ clock_set_target_val(UART3_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(0));
+ clock_enable(CCGR_UART3, 1);
+ return;
+ case 3:
+ clock_enable(CCGR_UART4, 0);
+ clock_set_target_val(UART4_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(0));
+ clock_enable(CCGR_UART4, 1);
+ return;
+ default:
+ printf("Invalid uart index\n");
+ return;
+ }
+}
+
+void init_wdog_clk(void)
+{
+ clock_enable(CCGR_WDOG1, 0);
+ clock_enable(CCGR_WDOG2, 0);
+ clock_enable(CCGR_WDOG3, 0);
+ clock_set_target_val(WDOG_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(0));
+ clock_enable(CCGR_WDOG1, 1);
+ clock_enable(CCGR_WDOG2, 1);
+ clock_enable(CCGR_WDOG3, 1);
+}
+
+int clock_init(void)
+{
+ u32 val_cfg0;
+
+ /*
+ * The gate is not exported to clk tree, so configure them here.
+ * According to ANAMIX SPEC
+ * sys pll1 fixed at 800MHz
+ * sys pll2 fixed at 1GHz
+ * Here we only enable the outputs.
+ */
+ val_cfg0 = readl(&ana_pll->sys_pll1_gnrl_ctl);
+ val_cfg0 |= INTPLL_CLKE_MASK | INTPLL_DIV2_CLKE_MASK |
+ INTPLL_DIV3_CLKE_MASK | INTPLL_DIV4_CLKE_MASK |
+ INTPLL_DIV5_CLKE_MASK | INTPLL_DIV6_CLKE_MASK |
+ INTPLL_DIV8_CLKE_MASK | INTPLL_DIV10_CLKE_MASK |
+ INTPLL_DIV20_CLKE_MASK;
+ writel(val_cfg0, &ana_pll->sys_pll1_gnrl_ctl);
+
+ val_cfg0 = readl(&ana_pll->sys_pll2_gnrl_ctl);
+ val_cfg0 |= INTPLL_CLKE_MASK | INTPLL_DIV2_CLKE_MASK |
+ INTPLL_DIV3_CLKE_MASK | INTPLL_DIV4_CLKE_MASK |
+ INTPLL_DIV5_CLKE_MASK | INTPLL_DIV6_CLKE_MASK |
+ INTPLL_DIV8_CLKE_MASK | INTPLL_DIV10_CLKE_MASK |
+ INTPLL_DIV20_CLKE_MASK;
+ writel(val_cfg0, &ana_pll->sys_pll2_gnrl_ctl);
+
+ /* config GIC to sys_pll2_100m */
+ clock_enable(CCGR_GIC, 0);
+ clock_set_target_val(GIC_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(3));
+ clock_enable(CCGR_GIC, 1);
+
+ clock_set_target_val(NAND_USDHC_BUS_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(1));
+
+ clock_enable(CCGR_DDR1, 0);
+ clock_set_target_val(DRAM_ALT_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(1));
+ clock_set_target_val(DRAM_APB_CLK_ROOT, CLK_ROOT_ON |
+ CLK_ROOT_SOURCE_SEL(1));
+ clock_enable(CCGR_DDR1, 1);
+
+ init_wdog_clk();
+
+ clock_enable(CCGR_TEMP_SENSOR, 1);
+
+ clock_enable(CCGR_SEC_DEBUG, 1);
+
+ return 0;
+};
+
+u32 imx_get_uartclk(void)
+{
+ return 24000000U;
+}
+
+u32 mxc_get_clock(enum mxc_clock clk)
+{
+ struct clk *clkp;
+ int ret;
+
+ switch (clk) {
+ case MXC_IPG_CLK:
+ ret = clk_get_by_id(IMX8MM_CLK_IPG_ROOT, &clkp);
+ if (ret)
+ return 0;
+ return clk_get_rate(clkp);
+ case MXC_ARM_CLK:
+ ret = clk_get_by_id(IMX8MM_CLK_A53_DIV, &clkp);
+ if (ret)
+ return 0;
+ return clk_get_rate(clkp);
+ default:
+ printf("%s: %d not supported\n", __func__, clk);
+ }
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.0.4) at 2025-09-19 21:23:46 +0000