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-rw-r--r--drivers/clk/ingenic/jz4725b-cgu.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/drivers/clk/ingenic/jz4725b-cgu.c b/drivers/clk/ingenic/jz4725b-cgu.c
new file mode 100644
index 000000000..786e361a4
--- /dev/null
+++ b/drivers/clk/ingenic/jz4725b-cgu.c
@@ -0,0 +1,263 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Ingenic JZ4725B SoC CGU driver
+ *
+ * Copyright (C) 2018 Paul Cercueil
+ * Author: Paul Cercueil <paul@crapouillou.net>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+
+#include <dt-bindings/clock/jz4725b-cgu.h>
+
+#include "cgu.h"
+#include "pm.h"
+
+/* CGU register offsets */
+#define CGU_REG_CPCCR 0x00
+#define CGU_REG_LCR 0x04
+#define CGU_REG_CPPCR 0x10
+#define CGU_REG_CLKGR 0x20
+#define CGU_REG_OPCR 0x24
+#define CGU_REG_I2SCDR 0x60
+#define CGU_REG_LPCDR 0x64
+#define CGU_REG_MSCCDR 0x68
+#define CGU_REG_SSICDR 0x74
+#define CGU_REG_CIMCDR 0x78
+
+/* bits within the LCR register */
+#define LCR_SLEEP BIT(0)
+
+static struct ingenic_cgu *cgu;
+
+static const s8 pll_od_encoding[4] = {
+ 0x0, 0x1, -1, 0x3,
+};
+
+static const u8 jz4725b_cgu_cpccr_div_table[] = {
+ 1, 2, 3, 4, 6, 8,
+};
+
+static const u8 jz4725b_cgu_pll_half_div_table[] = {
+ 2, 1,
+};
+
+static const struct ingenic_cgu_clk_info jz4725b_cgu_clocks[] = {
+
+ /* External clocks */
+
+ [JZ4725B_CLK_EXT] = { "ext", CGU_CLK_EXT },
+ [JZ4725B_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT },
+
+ [JZ4725B_CLK_PLL] = {
+ "pll", CGU_CLK_PLL,
+ .parents = { JZ4725B_CLK_EXT, -1, -1, -1 },
+ .pll = {
+ .reg = CGU_REG_CPPCR,
+ .rate_multiplier = 1,
+ .m_shift = 23,
+ .m_bits = 9,
+ .m_offset = 2,
+ .n_shift = 18,
+ .n_bits = 5,
+ .n_offset = 2,
+ .od_shift = 16,
+ .od_bits = 2,
+ .od_max = 4,
+ .od_encoding = pll_od_encoding,
+ .stable_bit = 10,
+ .bypass_reg = CGU_REG_CPPCR,
+ .bypass_bit = 9,
+ .enable_bit = 8,
+ },
+ },
+
+ /* Muxes & dividers */
+
+ [JZ4725B_CLK_PLL_HALF] = {
+ "pll half", CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
+ .div = {
+ CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1,
+ jz4725b_cgu_pll_half_div_table,
+ },
+ },
+
+ [JZ4725B_CLK_CCLK] = {
+ "cclk", CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
+ .div = {
+ CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1,
+ jz4725b_cgu_cpccr_div_table,
+ },
+ },
+
+ [JZ4725B_CLK_HCLK] = {
+ "hclk", CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
+ .div = {
+ CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1,
+ jz4725b_cgu_cpccr_div_table,
+ },
+ },
+
+ [JZ4725B_CLK_PCLK] = {
+ "pclk", CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
+ .div = {
+ CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1,
+ jz4725b_cgu_cpccr_div_table,
+ },
+ },
+
+ [JZ4725B_CLK_MCLK] = {
+ "mclk", CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
+ .div = {
+ CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1,
+ jz4725b_cgu_cpccr_div_table,
+ },
+ },
+
+ [JZ4725B_CLK_IPU] = {
+ "ipu", CGU_CLK_DIV | CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
+ .div = {
+ CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1,
+ jz4725b_cgu_cpccr_div_table,
+ },
+ .gate = { CGU_REG_CLKGR, 13 },
+ },
+
+ [JZ4725B_CLK_LCD] = {
+ "lcd", CGU_CLK_DIV | CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 },
+ .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 9 },
+ },
+
+ [JZ4725B_CLK_I2S] = {
+ "i2s", CGU_CLK_MUX | CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 },
+ .mux = { CGU_REG_CPCCR, 31, 1 },
+ .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 },
+ },
+
+ [JZ4725B_CLK_SPI] = {
+ "spi", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL, -1, -1 },
+ .mux = { CGU_REG_SSICDR, 31, 1 },
+ .div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 4 },
+ },
+
+ [JZ4725B_CLK_MMC_MUX] = {
+ "mmc_mux", CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_PLL_HALF, -1, -1, -1 },
+ .div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 },
+ },
+
+ [JZ4725B_CLK_UDC] = {
+ "udc", CGU_CLK_MUX | CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_EXT, JZ4725B_CLK_PLL_HALF, -1, -1 },
+ .mux = { CGU_REG_CPCCR, 29, 1 },
+ .div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 },
+ },
+
+ /* Gate-only clocks */
+
+ [JZ4725B_CLK_UART] = {
+ "uart", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_EXT, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 0 },
+ },
+
+ [JZ4725B_CLK_DMA] = {
+ "dma", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_PCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 12 },
+ },
+
+ [JZ4725B_CLK_ADC] = {
+ "adc", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_EXT, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 7 },
+ },
+
+ [JZ4725B_CLK_I2C] = {
+ "i2c", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_EXT, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 3 },
+ },
+
+ [JZ4725B_CLK_AIC] = {
+ "aic", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_EXT, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 5 },
+ },
+
+ [JZ4725B_CLK_MMC0] = {
+ "mmc0", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 6 },
+ },
+
+ [JZ4725B_CLK_MMC1] = {
+ "mmc1", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_MMC_MUX, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 16 },
+ },
+
+ [JZ4725B_CLK_BCH] = {
+ "bch", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_MCLK/* not sure */, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 11 },
+ },
+
+ [JZ4725B_CLK_TCU] = {
+ "tcu", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_EXT/* not sure */, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 1 },
+ },
+
+ [JZ4725B_CLK_EXT512] = {
+ "ext/512", CGU_CLK_FIXDIV,
+ .parents = { JZ4725B_CLK_EXT },
+
+ /* Doc calls it EXT512, but it seems to be /256... */
+ .fixdiv = { 256 },
+ },
+
+ [JZ4725B_CLK_RTC] = {
+ "rtc", CGU_CLK_MUX,
+ .parents = { JZ4725B_CLK_EXT512, JZ4725B_CLK_OSC32K, -1, -1 },
+ .mux = { CGU_REG_OPCR, 2, 1},
+ },
+
+ [JZ4725B_CLK_UDC_PHY] = {
+ "udc_phy", CGU_CLK_GATE,
+ .parents = { JZ4725B_CLK_EXT, -1, -1, -1 },
+ .gate = { CGU_REG_OPCR, 6, true },
+ },
+};
+
+static void __init jz4725b_cgu_init(struct device_node *np)
+{
+ int retval;
+
+ cgu = ingenic_cgu_new(jz4725b_cgu_clocks,
+ ARRAY_SIZE(jz4725b_cgu_clocks), np);
+ if (!cgu) {
+ pr_err("%s: failed to initialise CGU\n", __func__);
+ return;
+ }
+
+ retval = ingenic_cgu_register_clocks(cgu);
+ if (retval)
+ pr_err("%s: failed to register CGU Clocks\n", __func__);
+
+ ingenic_cgu_register_syscore_ops(cgu);
+}
+CLK_OF_DECLARE_DRIVER(jz4725b_cgu, "ingenic,jz4725b-cgu", jz4725b_cgu_init);