[PATCH 3/5] clk: Ingenic: Add CGU driver for X1830.

Zhou Yanjie
2019-11-27T03:34:46Z

Add support for the clocks provided by the CGU in the Ingenic X1830
SoC, making use of the cgu code to do the heavy lifting.

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---
drivers/clk/ingenic/Kconfig | 10 ++
drivers/clk/ingenic/Makefile | 1 +
drivers/clk/ingenic/x1830-cgu.c | 336 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 347 insertions(+)
create mode 100644 drivers/clk/ingenic/x1830-cgu.c

diff --git a/drivers/clk/ingenic/Kconfig b/drivers/clk/ingenic/Kconfig
index fb7b399..59c6c2c 100644
--- a/drivers/clk/ingenic/Kconfig
+++ b/drivers/clk/ingenic/Kconfig
@@ -55,6 +55,16 @@ config INGENIC_CGU_X1000

If building for a X1000 SoC, you want to say Y here.

+config INGENIC_CGU_X1830
+ bool "Ingenic X1830 CGU driver"
+ default MACH_X1830
+ select INGENIC_CGU_COMMON
+ help
+ Support the clocks provided by the CGU hardware on Ingenic X1830
+ and compatible SoCs.
+
+ If building for a X1830 SoC, you want to say Y here.
+
config INGENIC_TCU_CLK
bool "Ingenic JZ47xx TCU clocks driver"
default MACH_INGENIC
diff --git a/drivers/clk/ingenic/Makefile b/drivers/clk/ingenic/Makefile
index 8b1dad9..aaa4bff 100644
--- a/drivers/clk/ingenic/Makefile
+++ b/drivers/clk/ingenic/Makefile
@@ -5,4 +5,5 @@ obj-$(CONFIG_INGENIC_CGU_JZ4725B) += jz4725b-cgu.o
obj-$(CONFIG_INGENIC_CGU_JZ4770) += jz4770-cgu.o
obj-$(CONFIG_INGENIC_CGU_JZ4780) += jz4780-cgu.o
obj-$(CONFIG_INGENIC_CGU_X1000) += x1000-cgu.o
+obj-$(CONFIG_INGENIC_CGU_X1830) += x1830-cgu.o
obj-$(CONFIG_INGENIC_TCU_CLK) += tcu.o
diff --git a/drivers/clk/ingenic/x1830-cgu.c b/drivers/clk/ingenic/x1830-cgu.c
new file mode 100644
index 00000000..946af6f
--- /dev/null
+++ b/drivers/clk/ingenic/x1830-cgu.c
@@ -0,0 +1,336 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * X1830 SoC CGU driver
+ * Copyright (c) 2019 Zhou Yanjie <zhouyanjie@zoho.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <dt-bindings/clock/x1830-cgu.h>
+#include "cgu.h"
+#include "pm.h"
+
+/* CGU register offsets */
+#define CGU_REG_CPCCR 0x00
+#define CGU_REG_CPPCR 0x0c
+#define CGU_REG_APLL 0x10
+#define CGU_REG_MPLL 0x14
+#define CGU_REG_EPLL 0x58
+#define CGU_REG_VPLL 0xe0
+#define CGU_REG_CLKGR0 0x20
+#define CGU_REG_OPCR 0x24
+#define CGU_REG_CLKGR1 0x28
+#define CGU_REG_DDRCDR 0x2c
+#define CGU_REG_USBPCR 0x3c
+#define CGU_REG_USBRDT 0x40
+#define CGU_REG_USBVBFIL 0x44
+#define CGU_REG_USBPCR1 0x48
+#define CGU_REG_MACCDR 0x54
+#define CGU_REG_I2SCDR 0x60
+#define CGU_REG_LPCDR 0x64
+#define CGU_REG_MSC0CDR 0x68
+#define CGU_REG_I2SCDR1 0x70
+#define CGU_REG_SSICDR 0x74
+#define CGU_REG_CIMCDR 0x7c
+#define CGU_REG_MSC1CDR 0xa4
+#define CGU_REG_CMP_INTR 0xb0
+#define CGU_REG_CMP_INTRE 0xb4
+#define CGU_REG_DRCG 0xd0
+#define CGU_REG_CPCSR 0xd4
+#define CGU_REG_MACPHYC 0xe8
+
+/* bits within the OPCR register */
+#define OPCR_SPENDN0 BIT(7)
+#define OPCR_SPENDN1 BIT(6)
+
+static struct ingenic_cgu *cgu;
+
+static const s8 pll_od_encoding[64] = {
+ 0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3,
+ -1, -1, -1, -1, -1, -1, -1, 0x4,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, 0x5,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, 0x6,
+};
+
+static const struct ingenic_cgu_clk_info x1830_cgu_clocks[] = {
+
+ /* External clocks */
+
+ [X1830_CLK_EXCLK] = { "ext", CGU_CLK_EXT },
+ [X1830_CLK_RTCLK] = { "rtc", CGU_CLK_EXT },
+
+ /* PLLs */
+
+ [X1830_CLK_APLL] = {
+ "apll", CGU_CLK_PLL,
+ .parents = { X1830_CLK_EXCLK, -1, -1, -1 },
+ .pll = {
+ .version = CGU_X1830,
+ .reg = { CGU_REG_CPPCR, CGU_REG_APLL },
+ .m_shift = 20,
+ .m_bits = 9,
+ .m_offset = 1,
+ .n_shift = 14,
+ .n_bits = 6,
+ .n_offset = 1,
+ .od_shift = 11,
+ .od_bits = 3,
+ .od_max = 64,
+ .od_encoding = pll_od_encoding,
+ .bypass_bit = 30,
+ .enable_bit = 0,
+ .stable_bit = 3,
+ },
+ },
+
+ [X1830_CLK_MPLL] = {
+ "mpll", CGU_CLK_PLL,
+ .parents = { X1830_CLK_EXCLK, -1, -1, -1 },
+ .pll = {
+ .version = CGU_X1830,
+ .reg = { CGU_REG_CPPCR, CGU_REG_MPLL },
+ .m_shift = 20,
+ .m_bits = 9,
+ .m_offset = 1,
+ .n_shift = 14,
+ .n_bits = 6,
+ .n_offset = 1,
+ .od_shift = 11,
+ .od_bits = 3,
+ .od_max = 64,
+ .od_encoding = pll_od_encoding,
+ .bypass_bit = 28,
+ .enable_bit = 0,
+ .stable_bit = 3,
+ },
+ },
+
+ [X1830_CLK_EPLL] = {
+ "epll", CGU_CLK_PLL,
+ .parents = { X1830_CLK_EXCLK, -1, -1, -1 },
+ .pll = {
+ .version = CGU_X1830,
+ .reg = { CGU_REG_CPPCR, CGU_REG_EPLL },
+ .m_shift = 20,
+ .m_bits = 9,
+ .m_offset = 1,
+ .n_shift = 14,
+ .n_bits = 6,
+ .n_offset = 1,
+ .od_shift = 11,
+ .od_bits = 3,
+ .od_max = 64,
+ .od_encoding = pll_od_encoding,
+ .bypass_bit = 24,
+ .enable_bit = 0,
+ .stable_bit = 3,
+ },
+ },
+
+ [X1830_CLK_VPLL] = {
+ "vpll", CGU_CLK_PLL,
+ .parents = { X1830_CLK_EXCLK, -1, -1, -1 },
+ .pll = {
+ .version = CGU_X1830,
+ .reg = { CGU_REG_CPPCR, CGU_REG_VPLL },
+ .m_shift = 20,
+ .m_bits = 9,
+ .m_offset = 1,
+ .n_shift = 14,
+ .n_bits = 6,
+ .n_offset = 1,
+ .od_shift = 11,
+ .od_bits = 3,
+ .od_max = 64,
+ .od_encoding = pll_od_encoding,
+ .bypass_bit = 26,
+ .enable_bit = 0,
+ .stable_bit = 3,
+ },
+ },
+
+ /* Muxes & dividers */
+
+ [X1830_CLK_SCLKA] = {
+ "sclk_a", CGU_CLK_MUX,
+ .parents = { -1, X1830_CLK_EXCLK, X1830_CLK_APLL, -1 },
+ .mux = { CGU_REG_CPCCR, 30, 2 },
+ },
+
+ [X1830_CLK_CPUMUX] = {
+ "cpu_mux", CGU_CLK_MUX,
+ .parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 },
+ .mux = { CGU_REG_CPCCR, 28, 2 },
+ },
+
+ [X1830_CLK_CPU] = {
+ "cpu", CGU_CLK_DIV,
+ .parents = { X1830_CLK_CPUMUX, -1, -1, -1 },
+ .div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
+ },
+
+ [X1830_CLK_L2CACHE] = {
+ "l2cache", CGU_CLK_DIV,
+ .parents = { X1830_CLK_CPUMUX, -1, -1, -1 },
+ .div = { CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1 },
+ },
+
+ [X1830_CLK_AHB0] = {
+ "ahb0", CGU_CLK_MUX | CGU_CLK_DIV,
+ .parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 },
+ .mux = { CGU_REG_CPCCR, 26, 2 },
+ .div = { CGU_REG_CPCCR, 8, 1, 4, 21, -1, -1 },
+ },
+
+ [X1830_CLK_AHB2PMUX] = {
+ "ahb2_apb_mux", CGU_CLK_MUX,
+ .parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 },
+ .mux = { CGU_REG_CPCCR, 24, 2 },
+ },
+
+ [X1830_CLK_AHB2] = {
+ "ahb2", CGU_CLK_DIV,
+ .parents = { X1830_CLK_AHB2PMUX, -1, -1, -1 },
+ .div = { CGU_REG_CPCCR, 12, 1, 4, 20, -1, -1 },
+ },
+
+ [X1830_CLK_PCLK] = {
+ "pclk", CGU_CLK_DIV,
+ .parents = { X1830_CLK_AHB2PMUX, -1, -1, -1 },
+ .div = { CGU_REG_CPCCR, 16, 1, 4, 20, -1, -1 },
+ },
+
+ [X1830_CLK_DDR] = {
+ "ddr", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
+ .parents = { -1, X1830_CLK_SCLKA, X1830_CLK_MPLL, -1 },
+ .mux = { CGU_REG_DDRCDR, 30, 2 },
+ .div = { CGU_REG_DDRCDR, 0, 1, 4, 29, 28, 27 },
+ .gate = { CGU_REG_CLKGR0, 31 },
+ },
+
+ [X1830_CLK_MAC] = {
+ "mac", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
+ .parents = { X1830_CLK_SCLKA, X1830_CLK_MPLL,
+ X1830_CLK_VPLL, X1830_CLK_EPLL },
+ .mux = { CGU_REG_MACCDR, 30, 2 },
+ .div = { CGU_REG_MACCDR, 0, 1, 8, 29, 28, 27 },
+ .gate = { CGU_REG_CLKGR1, 4 },
+ },
+
+ [X1830_CLK_MSCMUX] = {
+ "msc_mux", CGU_CLK_MUX,
+ .parents = { X1830_CLK_SCLKA, X1830_CLK_MPLL,
+ X1830_CLK_VPLL, X1830_CLK_EPLL },
+ .mux = { CGU_REG_MSC0CDR, 30, 2 },
+ },
+
+ [X1830_CLK_MSC0] = {
+ "msc0", CGU_CLK_DIV | CGU_CLK_GATE,
+ .parents = { X1830_CLK_MSCMUX, -1, -1, -1 },
+ .div = { CGU_REG_MSC0CDR, 0, 2, 8, 29, 28, 27 },
+ .gate = { CGU_REG_CLKGR0, 4 },
+ },
+
+ [X1830_CLK_MSC1] = {
+ "msc1", CGU_CLK_DIV | CGU_CLK_GATE,
+ .parents = { X1830_CLK_MSCMUX, -1, -1, -1 },
+ .div = { CGU_REG_MSC1CDR, 0, 2, 8, 29, 28, 27 },
+ .gate = { CGU_REG_CLKGR0, 5 },
+ },
+
+ [X1830_CLK_SSIPLL] = {
+ "ssi_pll", CGU_CLK_MUX | CGU_CLK_DIV,
+ .parents = { X1830_CLK_SCLKA, X1830_CLK_MPLL,
+ X1830_CLK_VPLL, X1830_CLK_EPLL },
+ .mux = { CGU_REG_SSICDR, 30, 2 },
+ .div = { CGU_REG_SSICDR, 0, 1, 8, 28, 27, 26 },
+ },
+
+ [X1830_CLK_SSIMUX] = {
+ "ssi_mux", CGU_CLK_MUX,
+ .parents = { X1830_CLK_EXCLK, X1830_CLK_SSIPLL, -1, -1 },
+ .mux = { CGU_REG_SSICDR, 29, 1 },
+ },
+
+ /* Gate-only clocks */
+
+ [X1830_CLK_SSI0] = {
+ "ssi0", CGU_CLK_GATE,
+ .parents = { X1830_CLK_SSIMUX, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 6 },
+ },
+
+ [X1830_CLK_SMB0] = {
+ "smb0", CGU_CLK_GATE,
+ .parents = { X1830_CLK_PCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 7 },
+ },
+
+ [X1830_CLK_SMB1] = {
+ "smb1", CGU_CLK_GATE,
+ .parents = { X1830_CLK_PCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 8 },
+ },
+
+ [X1830_CLK_SMB2] = {
+ "smb2", CGU_CLK_GATE,
+ .parents = { X1830_CLK_PCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 9 },
+ },
+
+ [X1830_CLK_UART0] = {
+ "uart0", CGU_CLK_GATE,
+ .parents = { X1830_CLK_EXCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 14 },
+ },
+
+ [X1830_CLK_UART1] = {
+ "uart1", CGU_CLK_GATE,
+ .parents = { X1830_CLK_EXCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 15 },
+ },
+
+ [X1830_CLK_SSI1] = {
+ "ssi1", CGU_CLK_GATE,
+ .parents = { X1830_CLK_SSIMUX, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 19 },
+ },
+
+ [X1830_CLK_SFC] = {
+ "sfc", CGU_CLK_GATE,
+ .parents = { X1830_CLK_SSIPLL, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 20 },
+ },
+
+ [X1830_CLK_PDMA] = {
+ "pdma", CGU_CLK_GATE,
+ .parents = { X1830_CLK_EXCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR0, 21 },
+ },
+};
+
+static void __init x1830_cgu_init(struct device_node *np)
+{
+ int retval;
+
+ cgu = ingenic_cgu_new(x1830_cgu_clocks,
+ ARRAY_SIZE(x1830_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__);
+ return;
+ }
+
+ ingenic_cgu_register_syscore_ops(cgu);
+}
+CLK_OF_DECLARE_DRIVER(x1830_cgu, "ingenic,x1830-cgu", x1830_cgu_init);
--
2.7.4