diff options
Diffstat (limited to 'drivers/clk/meson/g12a-aoclk.c')
| -rw-r--r-- | drivers/clk/meson/g12a-aoclk.c | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/drivers/clk/meson/g12a-aoclk.c b/drivers/clk/meson/g12a-aoclk.c new file mode 100644 index 000000000000..96981da271fa --- /dev/null +++ b/drivers/clk/meson/g12a-aoclk.c @@ -0,0 +1,446 @@ +// 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) 2019 Baylibre SAS. + * Author: Neil Armstrong <narmstrong@baylibre.com> + */ +#include <linux/clk-provider.h> +#include <linux/platform_device.h> +#include <linux/reset-controller.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/g12a-aoclkc.h> +#include <dt-bindings/reset/g12a-aoclkc.h> + +/* + * AO Configuration Clock registers offsets + * Register offsets from the data sheet must be multiplied by 4. + */ +#define AO_RTI_STATUS_REG3 0x0C +#define AO_RTI_PWR_CNTL_REG0 0x10 +#define AO_RTI_GEN_CNTL_REG0 0x40 +#define AO_CLK_GATE0 0x4c +#define AO_CLK_GATE0_SP 0x50 +#define AO_OSCIN_CNTL 0x58 +#define AO_CEC_CLK_CNTL_REG0 0x74 +#define AO_CEC_CLK_CNTL_REG1 0x78 +#define AO_SAR_CLK 0x90 +#define AO_RTC_ALT_CLK_CNTL0 0x94 +#define AO_RTC_ALT_CLK_CNTL1 0x98 + +static const struct clk_parent_data g12a_ao_pclk_parents = { .fw_name = "mpeg-clk" }; + +#define G12A_AO_PCLK(_name, _reg, _bit, _flags) \ + MESON_PCLK(g12a_ao_##_name, _reg, _bit, &g12a_ao_pclk_parents, _flags) + +/* + * NOTE: The gates below are marked with CLK_IGNORE_UNUSED for historic reasons + * Users are encouraged to test without it and submit changes to: + * - remove the flag if not necessary + * - replace the flag with something more adequate, such as CLK_IS_CRITICAL, + * if appropriate. + * - add a comment explaining why the use of CLK_IGNORE_UNUSED is desirable + * for a particular clock. + */ +static G12A_AO_PCLK(ahb, AO_CLK_GATE0, 0, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(ir_in, AO_CLK_GATE0, 1, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(i2c_m0, AO_CLK_GATE0, 2, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(i2c_s0, AO_CLK_GATE0, 3, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(uart, AO_CLK_GATE0, 4, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(prod_i2c, AO_CLK_GATE0, 5, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(uart2, AO_CLK_GATE0, 6, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(ir_out, AO_CLK_GATE0, 7, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(saradc, AO_CLK_GATE0, 8, CLK_IGNORE_UNUSED); + +static G12A_AO_PCLK(mailbox, AO_CLK_GATE0_SP, 0, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(m3, AO_CLK_GATE0_SP, 1, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(ahb_sram, AO_CLK_GATE0_SP, 2, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(rti, AO_CLK_GATE0_SP, 3, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(m4_fclk, AO_CLK_GATE0_SP, 4, CLK_IGNORE_UNUSED); +static G12A_AO_PCLK(m4_hclk, AO_CLK_GATE0_SP, 5, CLK_IGNORE_UNUSED); + +static struct clk_regmap g12a_ao_cts_oscin = { + .data = &(struct clk_regmap_gate_data){ + .offset = AO_RTI_PWR_CNTL_REG0, + .bit_idx = 14, + }, + .hw.init = &(struct clk_init_data){ + .name = "cts_oscin", + .ops = &clk_regmap_gate_ro_ops, + .parent_data = &(const struct clk_parent_data) { + .fw_name = "xtal", + }, + .num_parents = 1, + }, +}; + +static const struct meson_clk_dualdiv_param g12a_32k_div_table[] = { + { + .dual = 1, + .n1 = 733, + .m1 = 8, + .n2 = 732, + .m2 = 11, + }, {} +}; + +/* 32k_by_oscin clock */ + +static struct clk_regmap g12a_ao_32k_by_oscin_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_by_oscin_pre", + .ops = &clk_regmap_gate_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_cts_oscin.hw + }, + .num_parents = 1, + }, +}; + +static struct clk_regmap g12a_ao_32k_by_oscin_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 = g12a_32k_div_table, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_32k_by_oscin_div", + .ops = &meson_clk_dualdiv_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_32k_by_oscin_pre.hw + }, + .num_parents = 1, + }, +}; + +static struct clk_regmap g12a_ao_32k_by_oscin_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_by_oscin_sel", + .ops = &clk_regmap_mux_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_32k_by_oscin_div.hw, + &g12a_ao_32k_by_oscin_pre.hw, + }, + .num_parents = 2, + .flags = CLK_SET_RATE_PARENT, + }, +}; + +static struct clk_regmap g12a_ao_32k_by_oscin = { + .data = &(struct clk_regmap_gate_data){ + .offset = AO_RTC_ALT_CLK_CNTL0, + .bit_idx = 30, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_32k_by_oscin", + .ops = &clk_regmap_gate_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_32k_by_oscin_sel.hw + }, + .num_parents = 1, + .flags = CLK_SET_RATE_PARENT, + }, +}; + +/* cec clock */ + +static struct clk_regmap g12a_ao_cec_pre = { + .data = &(struct clk_regmap_gate_data){ + .offset = AO_CEC_CLK_CNTL_REG0, + .bit_idx = 31, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_cec_pre", + .ops = &clk_regmap_gate_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_cts_oscin.hw + }, + .num_parents = 1, + }, +}; + +static struct clk_regmap g12a_ao_cec_div = { + .data = &(struct meson_clk_dualdiv_data){ + .n1 = { + .reg_off = AO_CEC_CLK_CNTL_REG0, + .shift = 0, + .width = 12, + }, + .n2 = { + .reg_off = AO_CEC_CLK_CNTL_REG0, + .shift = 12, + .width = 12, + }, + .m1 = { + .reg_off = AO_CEC_CLK_CNTL_REG1, + .shift = 0, + .width = 12, + }, + .m2 = { + .reg_off = AO_CEC_CLK_CNTL_REG1, + .shift = 12, + .width = 12, + }, + .dual = { + .reg_off = AO_CEC_CLK_CNTL_REG0, + .shift = 28, + .width = 1, + }, + .table = g12a_32k_div_table, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_cec_div", + .ops = &meson_clk_dualdiv_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_cec_pre.hw + }, + .num_parents = 1, + }, +}; + +static struct clk_regmap g12a_ao_cec_sel = { + .data = &(struct clk_regmap_mux_data) { + .offset = AO_CEC_CLK_CNTL_REG1, + .mask = 0x1, + .shift = 24, + .flags = CLK_MUX_ROUND_CLOSEST, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_cec_sel", + .ops = &clk_regmap_mux_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_cec_div.hw, + &g12a_ao_cec_pre.hw, + }, + .num_parents = 2, + .flags = CLK_SET_RATE_PARENT, + }, +}; + +static struct clk_regmap g12a_ao_cec = { + .data = &(struct clk_regmap_gate_data){ + .offset = AO_CEC_CLK_CNTL_REG0, + .bit_idx = 30, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_cec", + .ops = &clk_regmap_gate_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_cec_sel.hw + }, + .num_parents = 1, + .flags = CLK_SET_RATE_PARENT, + }, +}; + +static struct clk_regmap g12a_ao_cts_rtc_oscin = { + .data = &(struct clk_regmap_mux_data) { + .offset = AO_RTI_PWR_CNTL_REG0, + .mask = 0x1, + .shift = 10, + .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 []) { + { .hw = &g12a_ao_32k_by_oscin.hw }, + { .fw_name = "ext-32k-0", }, + }, + .num_parents = 2, + .flags = CLK_SET_RATE_PARENT, + }, +}; + +static struct clk_regmap g12a_ao_clk81 = { + .data = &(struct clk_regmap_mux_data) { + .offset = AO_RTI_PWR_CNTL_REG0, + .mask = 0x1, + .shift = 8, + .flags = CLK_MUX_ROUND_CLOSEST, + }, + .hw.init = &(struct clk_init_data){ + /* + * NOTE: this is one of the infamous clock the pwm driver + * can request directly by its global name. It's wrong but + * there is not much we can do about it until the support + * for the old pwm bindings is dropped + */ + .name = "g12a_ao_clk81", + .ops = &clk_regmap_mux_ro_ops, + .parent_data = (const struct clk_parent_data []) { + { .fw_name = "mpeg-clk", }, + { .hw = &g12a_ao_cts_rtc_oscin.hw }, + }, + .num_parents = 2, + .flags = CLK_SET_RATE_PARENT, + }, +}; + +static struct clk_regmap g12a_ao_saradc_mux = { + .data = &(struct clk_regmap_mux_data) { + .offset = AO_SAR_CLK, + .mask = 0x3, + .shift = 9, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_saradc_mux", + .ops = &clk_regmap_mux_ops, + .parent_data = (const struct clk_parent_data []) { + { .fw_name = "xtal", }, + { .hw = &g12a_ao_clk81.hw }, + }, + .num_parents = 2, + }, +}; + +static struct clk_regmap g12a_ao_saradc_div = { + .data = &(struct clk_regmap_div_data) { + .offset = AO_SAR_CLK, + .shift = 0, + .width = 8, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_saradc_div", + .ops = &clk_regmap_divider_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_saradc_mux.hw + }, + .num_parents = 1, + .flags = CLK_SET_RATE_PARENT, + }, +}; + +static struct clk_regmap g12a_ao_saradc_gate = { + .data = &(struct clk_regmap_gate_data) { + .offset = AO_SAR_CLK, + .bit_idx = 8, + }, + .hw.init = &(struct clk_init_data){ + .name = "ao_saradc_gate", + .ops = &clk_regmap_gate_ops, + .parent_hws = (const struct clk_hw *[]) { + &g12a_ao_saradc_div.hw + }, + .num_parents = 1, + .flags = CLK_SET_RATE_PARENT, + }, +}; + +static const unsigned int g12a_ao_reset[] = { + [RESET_AO_IR_IN] = 16, + [RESET_AO_UART] = 17, + [RESET_AO_I2C_M] = 18, + [RESET_AO_I2C_S] = 19, + [RESET_AO_SAR_ADC] = 20, + [RESET_AO_UART2] = 22, + [RESET_AO_IR_OUT] = 23, +}; + +static struct clk_hw *g12a_ao_hw_clks[] = { + [CLKID_AO_AHB] = &g12a_ao_ahb.hw, + [CLKID_AO_IR_IN] = &g12a_ao_ir_in.hw, + [CLKID_AO_I2C_M0] = &g12a_ao_i2c_m0.hw, + [CLKID_AO_I2C_S0] = &g12a_ao_i2c_s0.hw, + [CLKID_AO_UART] = &g12a_ao_uart.hw, + [CLKID_AO_PROD_I2C] = &g12a_ao_prod_i2c.hw, + [CLKID_AO_UART2] = &g12a_ao_uart2.hw, + [CLKID_AO_IR_OUT] = &g12a_ao_ir_out.hw, + [CLKID_AO_SAR_ADC] = &g12a_ao_saradc.hw, + [CLKID_AO_MAILBOX] = &g12a_ao_mailbox.hw, + [CLKID_AO_M3] = &g12a_ao_m3.hw, + [CLKID_AO_AHB_SRAM] = &g12a_ao_ahb_sram.hw, + [CLKID_AO_RTI] = &g12a_ao_rti.hw, + [CLKID_AO_M4_FCLK] = &g12a_ao_m4_fclk.hw, + [CLKID_AO_M4_HCLK] = &g12a_ao_m4_hclk.hw, + [CLKID_AO_CLK81] = &g12a_ao_clk81.hw, + [CLKID_AO_SAR_ADC_SEL] = &g12a_ao_saradc_mux.hw, + [CLKID_AO_SAR_ADC_DIV] = &g12a_ao_saradc_div.hw, + [CLKID_AO_SAR_ADC_CLK] = &g12a_ao_saradc_gate.hw, + [CLKID_AO_CTS_OSCIN] = &g12a_ao_cts_oscin.hw, + [CLKID_AO_32K_PRE] = &g12a_ao_32k_by_oscin_pre.hw, + [CLKID_AO_32K_DIV] = &g12a_ao_32k_by_oscin_div.hw, + [CLKID_AO_32K_SEL] = &g12a_ao_32k_by_oscin_sel.hw, + [CLKID_AO_32K] = &g12a_ao_32k_by_oscin.hw, + [CLKID_AO_CEC_PRE] = &g12a_ao_cec_pre.hw, + [CLKID_AO_CEC_DIV] = &g12a_ao_cec_div.hw, + [CLKID_AO_CEC_SEL] = &g12a_ao_cec_sel.hw, + [CLKID_AO_CEC] = &g12a_ao_cec.hw, + [CLKID_AO_CTS_RTC_OSCIN] = &g12a_ao_cts_rtc_oscin.hw, +}; + +static const struct meson_aoclk_data g12a_ao_clkc_data = { + .reset_reg = AO_RTI_GEN_CNTL_REG0, + .num_reset = ARRAY_SIZE(g12a_ao_reset), + .reset = g12a_ao_reset, + .clkc_data = { + .hw_clks = { + .hws = g12a_ao_hw_clks, + .num = ARRAY_SIZE(g12a_ao_hw_clks), + }, + }, +}; + +static const struct of_device_id g12a_ao_clkc_match_table[] = { + { + .compatible = "amlogic,meson-g12a-aoclkc", + .data = &g12a_ao_clkc_data.clkc_data, + }, + { } +}; +MODULE_DEVICE_TABLE(of, g12a_ao_clkc_match_table); + +static struct platform_driver g12a_ao_clkc_driver = { + .probe = meson_aoclkc_probe, + .driver = { + .name = "g12a-aoclkc", + .of_match_table = g12a_ao_clkc_match_table, + }, +}; +module_platform_driver(g12a_ao_clkc_driver); + +MODULE_DESCRIPTION("Amlogic G12A Always-ON Clock Controller driver"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("CLK_MESON"); |