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path: root/drivers/clk/meson/a1-pll.c
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Diffstat (limited to 'drivers/clk/meson/a1-pll.c')
-rw-r--r--drivers/clk/meson/a1-pll.c356
1 files changed, 356 insertions, 0 deletions
diff --git a/drivers/clk/meson/a1-pll.c b/drivers/clk/meson/a1-pll.c
new file mode 100644
index 000000000000..bd2f1d1ec6e4
--- /dev/null
+++ b/drivers/clk/meson/a1-pll.c
@@ -0,0 +1,356 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2019 Amlogic, Inc. All rights reserved.
+ * Author: Jian Hu <jian.hu@amlogic.com>
+ *
+ * Copyright (c) 2023, SberDevices. All Rights Reserved.
+ * Author: Dmitry Rokosov <ddrokosov@sberdevices.ru>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include "a1-pll.h"
+#include "clk-regmap.h"
+
+static struct clk_regmap fixed_pll_dco = {
+ .data = &(struct meson_clk_pll_data){
+ .en = {
+ .reg_off = ANACTRL_FIXPLL_CTRL0,
+ .shift = 28,
+ .width = 1,
+ },
+ .m = {
+ .reg_off = ANACTRL_FIXPLL_CTRL0,
+ .shift = 0,
+ .width = 8,
+ },
+ .n = {
+ .reg_off = ANACTRL_FIXPLL_CTRL0,
+ .shift = 10,
+ .width = 5,
+ },
+ .frac = {
+ .reg_off = ANACTRL_FIXPLL_CTRL1,
+ .shift = 0,
+ .width = 19,
+ },
+ .l = {
+ .reg_off = ANACTRL_FIXPLL_STS,
+ .shift = 31,
+ .width = 1,
+ },
+ .rst = {
+ .reg_off = ANACTRL_FIXPLL_CTRL0,
+ .shift = 29,
+ .width = 1,
+ },
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "fixed_pll_dco",
+ .ops = &meson_clk_pll_ro_ops,
+ .parent_data = &(const struct clk_parent_data) {
+ .fw_name = "fixpll_in",
+ },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_regmap fixed_pll = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = ANACTRL_FIXPLL_CTRL0,
+ .bit_idx = 20,
+ },
+ .hw.init = &(struct clk_init_data) {
+ .name = "fixed_pll",
+ .ops = &clk_regmap_gate_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fixed_pll_dco.hw
+ },
+ .num_parents = 1,
+ },
+};
+
+static const struct pll_mult_range hifi_pll_mult_range = {
+ .min = 32,
+ .max = 64,
+};
+
+static const struct reg_sequence hifi_init_regs[] = {
+ { .reg = ANACTRL_HIFIPLL_CTRL1, .def = 0x01800000 },
+ { .reg = ANACTRL_HIFIPLL_CTRL2, .def = 0x00001100 },
+ { .reg = ANACTRL_HIFIPLL_CTRL3, .def = 0x100a1100 },
+ { .reg = ANACTRL_HIFIPLL_CTRL4, .def = 0x00302000 },
+ { .reg = ANACTRL_HIFIPLL_CTRL0, .def = 0x01f18000 },
+};
+
+static struct clk_regmap hifi_pll = {
+ .data = &(struct meson_clk_pll_data){
+ .en = {
+ .reg_off = ANACTRL_HIFIPLL_CTRL0,
+ .shift = 28,
+ .width = 1,
+ },
+ .m = {
+ .reg_off = ANACTRL_HIFIPLL_CTRL0,
+ .shift = 0,
+ .width = 8,
+ },
+ .n = {
+ .reg_off = ANACTRL_HIFIPLL_CTRL0,
+ .shift = 10,
+ .width = 5,
+ },
+ .frac = {
+ .reg_off = ANACTRL_HIFIPLL_CTRL1,
+ .shift = 0,
+ .width = 19,
+ },
+ .l = {
+ .reg_off = ANACTRL_HIFIPLL_STS,
+ .shift = 31,
+ .width = 1,
+ },
+ .current_en = {
+ .reg_off = ANACTRL_HIFIPLL_CTRL0,
+ .shift = 26,
+ .width = 1,
+ },
+ .l_detect = {
+ .reg_off = ANACTRL_HIFIPLL_CTRL2,
+ .shift = 6,
+ .width = 1,
+ },
+ .range = &hifi_pll_mult_range,
+ .init_regs = hifi_init_regs,
+ .init_count = ARRAY_SIZE(hifi_init_regs),
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "hifi_pll",
+ .ops = &meson_clk_pll_ops,
+ .parent_data = &(const struct clk_parent_data) {
+ .fw_name = "hifipll_in",
+ },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_fixed_factor fclk_div2_div = {
+ .mult = 1,
+ .div = 2,
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div2_div",
+ .ops = &clk_fixed_factor_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fixed_pll.hw
+ },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_regmap fclk_div2 = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = ANACTRL_FIXPLL_CTRL0,
+ .bit_idx = 21,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div2",
+ .ops = &clk_regmap_gate_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fclk_div2_div.hw
+ },
+ .num_parents = 1,
+ /*
+ * This clock is used by DDR clock in BL2 firmware
+ * and is required by the platform to operate correctly.
+ * Until the following condition are met, we need this clock to
+ * be marked as critical:
+ * a) Mark the clock used by a firmware resource, if possible
+ * b) CCF has a clock hand-off mechanism to make the sure the
+ * clock stays on until the proper driver comes along
+ */
+ .flags = CLK_IS_CRITICAL,
+ },
+};
+
+static struct clk_fixed_factor fclk_div3_div = {
+ .mult = 1,
+ .div = 3,
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div3_div",
+ .ops = &clk_fixed_factor_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fixed_pll.hw
+ },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_regmap fclk_div3 = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = ANACTRL_FIXPLL_CTRL0,
+ .bit_idx = 22,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div3",
+ .ops = &clk_regmap_gate_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fclk_div3_div.hw
+ },
+ .num_parents = 1,
+ /*
+ * This clock is used by APB bus which is set in boot ROM code
+ * and is required by the platform to operate correctly.
+ */
+ .flags = CLK_IS_CRITICAL,
+ },
+};
+
+static struct clk_fixed_factor fclk_div5_div = {
+ .mult = 1,
+ .div = 5,
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div5_div",
+ .ops = &clk_fixed_factor_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fixed_pll.hw
+ },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_regmap fclk_div5 = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = ANACTRL_FIXPLL_CTRL0,
+ .bit_idx = 23,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div5",
+ .ops = &clk_regmap_gate_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fclk_div5_div.hw
+ },
+ .num_parents = 1,
+ /*
+ * This clock is used by AXI bus which setted in Romcode
+ * and is required by the platform to operate correctly.
+ */
+ .flags = CLK_IS_CRITICAL,
+ },
+};
+
+static struct clk_fixed_factor fclk_div7_div = {
+ .mult = 1,
+ .div = 7,
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div7_div",
+ .ops = &clk_fixed_factor_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fixed_pll.hw
+ },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_regmap fclk_div7 = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = ANACTRL_FIXPLL_CTRL0,
+ .bit_idx = 24,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div7",
+ .ops = &clk_regmap_gate_ops,
+ .parent_hws = (const struct clk_hw *[]) {
+ &fclk_div7_div.hw
+ },
+ .num_parents = 1,
+ },
+};
+
+/* Array of all clocks registered by this provider */
+static struct clk_hw_onecell_data a1_pll_clks = {
+ .hws = {
+ [CLKID_FIXED_PLL_DCO] = &fixed_pll_dco.hw,
+ [CLKID_FIXED_PLL] = &fixed_pll.hw,
+ [CLKID_FCLK_DIV2_DIV] = &fclk_div2_div.hw,
+ [CLKID_FCLK_DIV3_DIV] = &fclk_div3_div.hw,
+ [CLKID_FCLK_DIV5_DIV] = &fclk_div5_div.hw,
+ [CLKID_FCLK_DIV7_DIV] = &fclk_div7_div.hw,
+ [CLKID_FCLK_DIV2] = &fclk_div2.hw,
+ [CLKID_FCLK_DIV3] = &fclk_div3.hw,
+ [CLKID_FCLK_DIV5] = &fclk_div5.hw,
+ [CLKID_FCLK_DIV7] = &fclk_div7.hw,
+ [CLKID_HIFI_PLL] = &hifi_pll.hw,
+ [NR_PLL_CLKS] = NULL,
+ },
+ .num = NR_PLL_CLKS,
+};
+
+static struct clk_regmap *const a1_pll_regmaps[] = {
+ &fixed_pll_dco,
+ &fixed_pll,
+ &fclk_div2,
+ &fclk_div3,
+ &fclk_div5,
+ &fclk_div7,
+ &hifi_pll,
+};
+
+static struct regmap_config a1_pll_regmap_cfg = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
+static int meson_a1_pll_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ void __iomem *base;
+ struct regmap *map;
+ int clkid, i, err;
+
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return dev_err_probe(dev, PTR_ERR(base),
+ "can't ioremap resource\n");
+
+ map = devm_regmap_init_mmio(dev, base, &a1_pll_regmap_cfg);
+ if (IS_ERR(map))
+ return dev_err_probe(dev, PTR_ERR(map),
+ "can't init regmap mmio region\n");
+
+ /* Populate regmap for the regmap backed clocks */
+ for (i = 0; i < ARRAY_SIZE(a1_pll_regmaps); i++)
+ a1_pll_regmaps[i]->map = map;
+
+ /* Register clocks */
+ for (clkid = 0; clkid < a1_pll_clks.num; clkid++) {
+ err = devm_clk_hw_register(dev, a1_pll_clks.hws[clkid]);
+ if (err)
+ return dev_err_probe(dev, err,
+ "clock[%d] registration failed\n",
+ clkid);
+ }
+
+ return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+ &a1_pll_clks);
+}
+
+static const struct of_device_id a1_pll_clkc_match_table[] = {
+ { .compatible = "amlogic,a1-pll-clkc", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, a1_pll_clkc_match_table);
+
+static struct platform_driver a1_pll_clkc_driver = {
+ .probe = meson_a1_pll_probe,
+ .driver = {
+ .name = "a1-pll-clkc",
+ .of_match_table = a1_pll_clkc_match_table,
+ },
+};
+
+module_platform_driver(a1_pll_clkc_driver);
+MODULE_AUTHOR("Jian Hu <jian.hu@amlogic.com>");
+MODULE_AUTHOR("Dmitry Rokosov <ddrokosov@sberdevices.ru>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-12 01:07:47 +0300