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Date: Tue, 21 Aug 2018 14:38:19 +0200
From: Paul Cercueil <paul@...pouillou.net>
To: Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>
Cc: od@...c.me, linux-kernel@...r.kernel.org,
linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 3/3] clk: Add Ingenic jz4725b CGU driver
Add support for the clocks provided by the CGU in the Ingenic JZ4725B
SoC.
Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
drivers/clk/ingenic/Kconfig | 10 ++
drivers/clk/ingenic/Makefile | 1 +
drivers/clk/ingenic/jz4725b-cgu.c | 225 ++++++++++++++++++++++++++++++
3 files changed, 236 insertions(+)
create mode 100644 drivers/clk/ingenic/jz4725b-cgu.c
diff --git a/drivers/clk/ingenic/Kconfig b/drivers/clk/ingenic/Kconfig
index 851a5662f119..a3a158a0c946 100644
--- a/drivers/clk/ingenic/Kconfig
+++ b/drivers/clk/ingenic/Kconfig
@@ -14,6 +14,16 @@ config INGENIC_CGU_JZ4740
If building for a JZ4740 SoC, you want to say Y here.
+config INGENIC_CGU_JZ4725B
+ bool "Ingenic JZ4725B CGU driver"
+ default MACH_JZ4725B
+ select INGENIC_CGU_COMMON
+ help
+ Support the clocks provided by the CGU hardware on Ingenic JZ4725B
+ and compatible SoCs.
+
+ If building for a JZ4725B SoC, you want to say Y here.
+
config INGENIC_CGU_JZ4770
bool "Ingenic JZ4770 CGU driver"
default MACH_JZ4770
diff --git a/drivers/clk/ingenic/Makefile b/drivers/clk/ingenic/Makefile
index 8b8dc79c7ce6..00a79b2fba10 100644
--- a/drivers/clk/ingenic/Makefile
+++ b/drivers/clk/ingenic/Makefile
@@ -1,4 +1,5 @@
obj-$(CONFIG_INGENIC_CGU_COMMON) += cgu.o
obj-$(CONFIG_INGENIC_CGU_JZ4740) += jz4740-cgu.o
+obj-$(CONFIG_INGENIC_CGU_JZ4725B) += jz4725b-cgu.o
obj-$(CONFIG_INGENIC_CGU_JZ4770) += jz4770-cgu.o
obj-$(CONFIG_INGENIC_CGU_JZ4780) += jz4780-cgu.o
diff --git a/drivers/clk/ingenic/jz4725b-cgu.c b/drivers/clk/ingenic/jz4725b-cgu.c
new file mode 100644
index 000000000000..584ff4ff81c7
--- /dev/null
+++ b/drivers/clk/ingenic/jz4725b-cgu.c
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Ingenic JZ4725B SoC CGU driver
+ *
+ * Copyright (C) 2018 Paul Cercueil
+ * Author: Paul Cercueil <paul@...pouillou.net>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <dt-bindings/clock/jz4725b-cgu.h>
+#include "cgu.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 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,
+ .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_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_CLK_CCLK] = {
+ "cclk", CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
+ .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
+ },
+
+ [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_CLK_PCLK] = {
+ "pclk", CGU_CLK_DIV,
+ .parents = { JZ4725B_CLK_PLL, -1, -1, -1 },
+ .div = { CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1 },
+ },
+
+ [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_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 },
+ .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 | CGU_CLK_GATE,
+ .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 },
+ .gate = { CGU_REG_CLKGR, 6 },
+ },
+
+ [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},
+ },
+};
+
+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__);
+}
+CLK_OF_DECLARE(jz4725b_cgu, "ingenic,jz4725b-cgu", jz4725b_cgu_init);
--
2.18.0
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