[PATCH v7 5/7] clk: meson-axg: Add AO Clock and Reset controller driver

Yixun Lan
2018-04-26T08:46:01Z

From: Qiufang Dai <qiufang.dai@amlogic.com>

Adds a Clock and Reset controller driver for the Always-On part
of the Amlogic Meson-AXG SoC.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Qiufang Dai <qiufang.dai@amlogic.com>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
---
drivers/clk/meson/Kconfig | 1 +
drivers/clk/meson/Makefile | 2 +-
drivers/clk/meson/axg-aoclk.c | 164 ++++++++++++++++++++++++++++++++++
drivers/clk/meson/axg-aoclk.h | 29 ++++++
4 files changed, 195 insertions(+), 1 deletion(-)
create mode 100644 drivers/clk/meson/axg-aoclk.c
create mode 100644 drivers/clk/meson/axg-aoclk.h

diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
index fddc7ec7b820..815659eebea3 100644
--- a/drivers/clk/meson/Kconfig
+++ b/drivers/clk/meson/Kconfig
@@ -38,6 +38,7 @@ config COMMON_CLK_AXG
bool
depends on COMMON_CLK_AMLOGIC
select RESET_CONTROLLER
+ select COMMON_CLK_MESON_AO
select COMMON_CLK_REGMAP_MESON
select MFD_SYSCON
help
diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
index 0a8df284f4e7..d0d13aeb369a 100644
--- a/drivers/clk/meson/Makefile
+++ b/drivers/clk/meson/Makefile
@@ -6,5 +6,5 @@ obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-pll.o clk-mpll.o clk-audio-divider.o
obj-$(CONFIG_COMMON_CLK_MESON_AO) += meson-aoclk.o
obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o
obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o gxbb-aoclk-32k.o
-obj-$(CONFIG_COMMON_CLK_AXG) += axg.o
+obj-$(CONFIG_COMMON_CLK_AXG) += axg.o axg-aoclk.o
obj-$(CONFIG_COMMON_CLK_REGMAP_MESON) += clk-regmap.o
diff --git a/drivers/clk/meson/axg-aoclk.c b/drivers/clk/meson/axg-aoclk.c
new file mode 100644
index 000000000000..29e088542387
--- /dev/null
+++ b/drivers/clk/meson/axg-aoclk.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Amlogic Meson-AXG Clock Controller Driver
+ *
+ * Copyright (c) 2016 Baylibre SAS.
+ * Author: Michael Turquette <mturquette@baylibre.com>
+ *
+ * Copyright (c) 2018 Amlogic, inc.
+ * Author: Qiufang Dai <qiufang.dai@amlogic.com>
+ */
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/mfd/syscon.h>
+#include "clk-regmap.h"
+#include "meson-aoclk.h"
+#include "axg-aoclk.h"
+
+#define AXG_AO_GATE(_name, _bit) \
+static struct clk_regmap axg_aoclk_##_name = { \
+ .data = &(struct clk_regmap_gate_data) { \
+ .offset = (AO_RTI_GEN_CNTL_REG0), \
+ .bit_idx = (_bit), \
+ }, \
+ .hw.init = &(struct clk_init_data) { \
+ .name = "axg_ao_" #_name, \
+ .ops = &clk_regmap_gate_ops, \
+ .parent_names = (const char *[]){ "clk81" }, \
+ .num_parents = 1, \
+ .flags = CLK_IGNORE_UNUSED, \
+ }, \
+}
+
+AXG_AO_GATE(remote, 0);
+AXG_AO_GATE(i2c_master, 1);
+AXG_AO_GATE(i2c_slave, 2);
+AXG_AO_GATE(uart1, 3);
+AXG_AO_GATE(uart2, 5);
+AXG_AO_GATE(ir_blaster, 6);
+AXG_AO_GATE(saradc, 7);
+
+static struct clk_regmap axg_aoclk_clk81 = {
+ .data = &(struct clk_regmap_mux_data) {
+ .offset = AO_RTI_PWR_CNTL_REG0,
+ .mask = 0x1,
+ .shift = 8,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "axg_ao_clk81",
+ .ops = &clk_regmap_mux_ro_ops,
+ .parent_names = (const char *[]){ "clk81", "ao_alt_xtal"},
+ .num_parents = 2,
+ },
+};
+
+static struct clk_regmap axg_aoclk_saradc_mux = {
+ .data = &(struct clk_regmap_mux_data) {
+ .offset = AO_SAR_CLK,
+ .mask = 0x3,
+ .shift = 9,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "axg_ao_saradc_mux",
+ .ops = &clk_regmap_mux_ops,
+ .parent_names = (const char *[]){ "xtal", "axg_ao_clk81" },
+ .num_parents = 2,
+ },
+};
+
+static struct clk_regmap axg_aoclk_saradc_div = {
+ .data = &(struct clk_regmap_div_data) {
+ .offset = AO_SAR_CLK,
+ .shift = 0,
+ .width = 8,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "axg_ao_saradc_div",
+ .ops = &clk_regmap_divider_ops,
+ .parent_names = (const char *[]){ "axg_ao_saradc_mux" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap axg_aoclk_saradc_gate = {
+ .data = &(struct clk_regmap_gate_data) {
+ .offset = AO_SAR_CLK,
+ .bit_idx = 8,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "axg_ao_saradc_gate",
+ .ops = &clk_regmap_gate_ops,
+ .parent_names = (const char *[]){ "axg_ao_saradc_div" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static const unsigned int axg_aoclk_reset[] = {
+ [RESET_AO_REMOTE] = 16,
+ [RESET_AO_I2C_MASTER] = 18,
+ [RESET_AO_I2C_SLAVE] = 19,
+ [RESET_AO_UART1] = 17,
+ [RESET_AO_UART2] = 22,
+ [RESET_AO_IR_BLASTER] = 23,
+};
+
+static struct clk_regmap *axg_aoclk_regmap[] = {
+ [CLKID_AO_REMOTE] = &axg_aoclk_remote,
+ [CLKID_AO_I2C_MASTER] = &axg_aoclk_i2c_master,
+ [CLKID_AO_I2C_SLAVE] = &axg_aoclk_i2c_slave,
+ [CLKID_AO_UART1] = &axg_aoclk_uart1,
+ [CLKID_AO_UART2] = &axg_aoclk_uart2,
+ [CLKID_AO_IR_BLASTER] = &axg_aoclk_ir_blaster,
+ [CLKID_AO_SAR_ADC] = &axg_aoclk_saradc,
+ [CLKID_AO_CLK81] = &axg_aoclk_clk81,
+ [CLKID_AO_SAR_ADC_SEL] = &axg_aoclk_saradc_mux,
+ [CLKID_AO_SAR_ADC_DIV] = &axg_aoclk_saradc_div,
+ [CLKID_AO_SAR_ADC_CLK] = &axg_aoclk_saradc_gate,
+};
+
+static const struct clk_hw_onecell_data axg_aoclk_onecell_data = {
+ .hws = {
+ [CLKID_AO_REMOTE] = &axg_aoclk_remote.hw,
+ [CLKID_AO_I2C_MASTER] = &axg_aoclk_i2c_master.hw,
+ [CLKID_AO_I2C_SLAVE] = &axg_aoclk_i2c_slave.hw,
+ [CLKID_AO_UART1] = &axg_aoclk_uart1.hw,
+ [CLKID_AO_UART2] = &axg_aoclk_uart2.hw,
+ [CLKID_AO_IR_BLASTER] = &axg_aoclk_ir_blaster.hw,
+ [CLKID_AO_SAR_ADC] = &axg_aoclk_saradc.hw,
+ [CLKID_AO_CLK81] = &axg_aoclk_clk81.hw,
+ [CLKID_AO_SAR_ADC_SEL] = &axg_aoclk_saradc_mux.hw,
+ [CLKID_AO_SAR_ADC_DIV] = &axg_aoclk_saradc_div.hw,
+ [CLKID_AO_SAR_ADC_CLK] = &axg_aoclk_saradc_gate.hw,
+ },
+ .num = NR_CLKS,
+};
+
+static const struct meson_aoclk_data axg_aoclkc_data = {
+ .reset_reg = AO_RTI_GEN_CNTL_REG0,
+ .num_reset = ARRAY_SIZE(axg_aoclk_reset),
+ .reset = axg_aoclk_reset,
+ .num_clks = ARRAY_SIZE(axg_aoclk_regmap),
+ .clks = axg_aoclk_regmap,
+ .hw_data = &axg_aoclk_onecell_data,
+};
+
+static const struct of_device_id axg_aoclkc_match_table[] = {
+ {
+ .compatible = "amlogic,meson-axg-aoclkc",
+ .data = &axg_aoclkc_data,
+ },
+ { }
+};
+
+static struct platform_driver axg_aoclkc_driver = {
+ .probe = meson_aoclkc_probe,
+ .driver = {
+ .name = "axg-aoclkc",
+ .of_match_table = axg_aoclkc_match_table,
+ },
+};
+
+builtin_platform_driver(axg_aoclkc_driver);
diff --git a/drivers/clk/meson/axg-aoclk.h b/drivers/clk/meson/axg-aoclk.h
new file mode 100644
index 000000000000..91384d8dd844
--- /dev/null
+++ b/drivers/clk/meson/axg-aoclk.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+/*
+ * Copyright (c) 2017 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * Copyright (c) 2018 Amlogic, inc.
+ * Author: Qiufang Dai <qiufang.dai@amlogic.com>
+ */
+
+#ifndef __AXG_AOCLKC_H
+#define __AXG_AOCLKC_H
+
+#define NR_CLKS 11
+/* AO Configuration Clock registers offsets
+ * Register offsets from the data sheet must be multiplied by 4.
+ */
+#define AO_RTI_PWR_CNTL_REG1 0x0C
+#define AO_RTI_PWR_CNTL_REG0 0x10
+#define AO_RTI_GEN_CNTL_REG0 0x40
+#define AO_OSCIN_CNTL 0x58
+#define AO_CRT_CLK_CNTL1 0x68
+#define AO_SAR_CLK 0x90
+#define AO_RTC_ALT_CLK_CNTL0 0x94
+#define AO_RTC_ALT_CLK_CNTL1 0x98
+
+#include <dt-bindings/clock/axg-aoclkc.h>
+#include <dt-bindings/reset/axg-aoclkc.h>
+
+#endif /* __AXG_AOCLKC_H */
--
2.17.0