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-rw-r--r--drivers/clk/meson/gxbb-aoclk.c303
1 files changed, 303 insertions, 0 deletions
diff --git a/drivers/clk/meson/gxbb-aoclk.c b/drivers/clk/meson/gxbb-aoclk.c
new file mode 100644
index 0000000000..4aec1740ac
--- /dev/null
+++ b/drivers/clk/meson/gxbb-aoclk.c
@@ -0,0 +1,303 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+/*
+ * Copyright (c) 2016 BayLibre, SAS.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include "meson-aoclk.h"
+
+#include "clk-regmap.h"
+#include "clk-dualdiv.h"
+
+#include <dt-bindings/clock/gxbb-aoclkc.h>
+#include <dt-bindings/reset/gxbb-aoclkc.h>
+
+/* AO Configuration Clock registers offsets */
+#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_RTC_ALT_CLK_CNTL0 0x94
+#define AO_RTC_ALT_CLK_CNTL1 0x98
+
+#define GXBB_AO_GATE(_name, _bit) \
+static struct clk_regmap _name##_ao = { \
+ .data = &(struct clk_regmap_gate_data) { \
+ .offset = AO_RTI_GEN_CNTL_REG0, \
+ .bit_idx = (_bit), \
+ }, \
+ .hw.init = &(struct clk_init_data) { \
+ .name = #_name "_ao", \
+ .ops = &clk_regmap_gate_ops, \
+ .parent_data = &(const struct clk_parent_data) { \
+ .fw_name = "mpeg-clk", \
+ }, \
+ .num_parents = 1, \
+ .flags = CLK_IGNORE_UNUSED, \
+ }, \
+}
+
+GXBB_AO_GATE(remote, 0);
+GXBB_AO_GATE(i2c_master, 1);
+GXBB_AO_GATE(i2c_slave, 2);
+GXBB_AO_GATE(uart1, 3);
+GXBB_AO_GATE(uart2, 5);
+GXBB_AO_GATE(ir_blaster, 6);
+
+static struct clk_regmap ao_cts_oscin = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = AO_RTI_PWR_CNTL_REG0,
+ .bit_idx = 6,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_cts_oscin",
+ .ops = &clk_regmap_gate_ro_ops,
+ .parent_data = &(const struct clk_parent_data) {
+ .fw_name = "xtal",
+ },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_regmap ao_32k_pre = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = AO_RTC_ALT_CLK_CNTL0,
+ .bit_idx = 31,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_32k_pre",
+ .ops = &clk_regmap_gate_ops,
+ .parent_hws = (const struct clk_hw *[]) { &ao_cts_oscin.hw },
+ .num_parents = 1,
+ },
+};
+
+static const struct meson_clk_dualdiv_param gxbb_32k_div_table[] = {
+ {
+ .dual = 1,
+ .n1 = 733,
+ .m1 = 8,
+ .n2 = 732,
+ .m2 = 11,
+ }, {}
+};
+
+static struct clk_regmap ao_32k_div = {
+ .data = &(struct meson_clk_dualdiv_data){
+ .n1 = {
+ .reg_off = AO_RTC_ALT_CLK_CNTL0,
+ .shift = 0,
+ .width = 12,
+ },
+ .n2 = {
+ .reg_off = AO_RTC_ALT_CLK_CNTL0,
+ .shift = 12,
+ .width = 12,
+ },
+ .m1 = {
+ .reg_off = AO_RTC_ALT_CLK_CNTL1,
+ .shift = 0,
+ .width = 12,
+ },
+ .m2 = {
+ .reg_off = AO_RTC_ALT_CLK_CNTL1,
+ .shift = 12,
+ .width = 12,
+ },
+ .dual = {
+ .reg_off = AO_RTC_ALT_CLK_CNTL0,
+ .shift = 28,
+ .width = 1,
+ },
+ .table = gxbb_32k_div_table,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_32k_div",
+ .ops = &meson_clk_dualdiv_ops,
+ .parent_hws = (const struct clk_hw *[]) { &ao_32k_pre.hw },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_regmap ao_32k_sel = {
+ .data = &(struct clk_regmap_mux_data) {
+ .offset = AO_RTC_ALT_CLK_CNTL1,
+ .mask = 0x1,
+ .shift = 24,
+ .flags = CLK_MUX_ROUND_CLOSEST,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_32k_sel",
+ .ops = &clk_regmap_mux_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &ao_32k_div.hw,
+ &ao_32k_pre.hw
+ },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap ao_32k = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = AO_RTC_ALT_CLK_CNTL0,
+ .bit_idx = 30,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_32k",
+ .ops = &clk_regmap_gate_ops,
+ .parent_hws = (const struct clk_hw *[]) { &ao_32k_sel.hw },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap ao_cts_rtc_oscin = {
+ .data = &(struct clk_regmap_mux_data) {
+ .offset = AO_RTI_PWR_CNTL_REG0,
+ .mask = 0x7,
+ .shift = 10,
+ .table = (u32[]){ 1, 2, 3, 4 },
+ .flags = CLK_MUX_ROUND_CLOSEST,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_cts_rtc_oscin",
+ .ops = &clk_regmap_mux_ops,
+ .parent_data = (const struct clk_parent_data []) {
+ { .fw_name = "ext-32k-0", },
+ { .fw_name = "ext-32k-1", },
+ { .fw_name = "ext-32k-2", },
+ { .hw = &ao_32k.hw },
+ },
+ .num_parents = 4,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap ao_clk81 = {
+ .data = &(struct clk_regmap_mux_data) {
+ .offset = AO_RTI_PWR_CNTL_REG0,
+ .mask = 0x1,
+ .shift = 0,
+ .flags = CLK_MUX_ROUND_CLOSEST,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_clk81",
+ .ops = &clk_regmap_mux_ro_ops,
+ .parent_data = (const struct clk_parent_data []) {
+ { .fw_name = "mpeg-clk", },
+ { .hw = &ao_cts_rtc_oscin.hw },
+ },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap ao_cts_cec = {
+ .data = &(struct clk_regmap_mux_data) {
+ .offset = AO_CRT_CLK_CNTL1,
+ .mask = 0x1,
+ .shift = 27,
+ .flags = CLK_MUX_ROUND_CLOSEST,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_cts_cec",
+ .ops = &clk_regmap_mux_ops,
+ /*
+ * FIXME: The 'fixme' parent obviously does not exist.
+ *
+ * ATM, CCF won't call get_parent() if num_parents is 1. It
+ * does not allow NULL as a parent name either.
+ *
+ * On this particular mux, we only know the input #1 parent
+ * but, on boot, unknown input #0 is set, so it is critical
+ * to call .get_parent() on it
+ *
+ * Until CCF gets fixed, adding this fake parent that won't
+ * ever be registered should work around the problem
+ */
+ .parent_data = (const struct clk_parent_data []) {
+ { .name = "fixme", .index = -1, },
+ { .hw = &ao_cts_rtc_oscin.hw },
+ },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static const unsigned int gxbb_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 *gxbb_aoclk[] = {
+ &remote_ao,
+ &i2c_master_ao,
+ &i2c_slave_ao,
+ &uart1_ao,
+ &uart2_ao,
+ &ir_blaster_ao,
+ &ao_cts_oscin,
+ &ao_32k_pre,
+ &ao_32k_div,
+ &ao_32k_sel,
+ &ao_32k,
+ &ao_cts_rtc_oscin,
+ &ao_clk81,
+ &ao_cts_cec,
+};
+
+static struct clk_hw *gxbb_aoclk_hw_clks[] = {
+ [CLKID_AO_REMOTE] = &remote_ao.hw,
+ [CLKID_AO_I2C_MASTER] = &i2c_master_ao.hw,
+ [CLKID_AO_I2C_SLAVE] = &i2c_slave_ao.hw,
+ [CLKID_AO_UART1] = &uart1_ao.hw,
+ [CLKID_AO_UART2] = &uart2_ao.hw,
+ [CLKID_AO_IR_BLASTER] = &ir_blaster_ao.hw,
+ [CLKID_AO_CEC_32K] = &ao_cts_cec.hw,
+ [CLKID_AO_CTS_OSCIN] = &ao_cts_oscin.hw,
+ [CLKID_AO_32K_PRE] = &ao_32k_pre.hw,
+ [CLKID_AO_32K_DIV] = &ao_32k_div.hw,
+ [CLKID_AO_32K_SEL] = &ao_32k_sel.hw,
+ [CLKID_AO_32K] = &ao_32k.hw,
+ [CLKID_AO_CTS_RTC_OSCIN] = &ao_cts_rtc_oscin.hw,
+ [CLKID_AO_CLK81] = &ao_clk81.hw,
+};
+
+static const struct meson_aoclk_data gxbb_aoclkc_data = {
+ .reset_reg = AO_RTI_GEN_CNTL_REG0,
+ .num_reset = ARRAY_SIZE(gxbb_aoclk_reset),
+ .reset = gxbb_aoclk_reset,
+ .num_clks = ARRAY_SIZE(gxbb_aoclk),
+ .clks = gxbb_aoclk,
+ .hw_clks = {
+ .hws = gxbb_aoclk_hw_clks,
+ .num = ARRAY_SIZE(gxbb_aoclk_hw_clks),
+ },
+};
+
+static const struct of_device_id gxbb_aoclkc_match_table[] = {
+ {
+ .compatible = "amlogic,meson-gx-aoclkc",
+ .data = &gxbb_aoclkc_data,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, gxbb_aoclkc_match_table);
+
+static struct platform_driver gxbb_aoclkc_driver = {
+ .probe = meson_aoclkc_probe,
+ .driver = {
+ .name = "gxbb-aoclkc",
+ .of_match_table = gxbb_aoclkc_match_table,
+ },
+};
+module_platform_driver(gxbb_aoclkc_driver);
+MODULE_LICENSE("GPL v2");