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linux/drivers/clk/socfpga/clk-s10.c
Dinh Nguyen 07afb8db73 clk: socfpga: stratix10: add clock driver for Stratix10 platform 
Add a clock driver for the Stratix10 SoC. The driver is similar to the
Cyclone5/Arria10 platforms, with the exception that this driver only uses
one single clock binding.

Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-04-06 10:12:35 -07:00

346 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2017, Intel Corporation
*/
#include <linux/slab.h>
#include <linux/clk-provider.h>
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <dt-bindings/clock/stratix10-clock.h>
#include "stratix10-clk.h"
static const char * const pll_mux[] = { "osc1", "cb_intosc_hs_div2_clk",
"f2s_free_clk",};
static const char * const cntr_mux[] = { "main_pll", "periph_pll",
"osc1", "cb_intosc_hs_div2_clk",
"f2s_free_clk"};
static const char * const boot_mux[] = { "osc1", "cb_intosc_hs_div2_clk",};
static const char * const noc_free_mux[] = {"main_noc_base_clk",
"peri_noc_base_clk",
"osc1", "cb_intosc_hs_div2_clk",
"f2s_free_clk"};
static const char * const emaca_free_mux[] = {"peri_emaca_clk", "boot_clk"};
static const char * const emacb_free_mux[] = {"peri_emacb_clk", "boot_clk"};
static const char * const emac_ptp_free_mux[] = {"peri_emac_ptp_clk", "boot_clk"};
static const char * const gpio_db_free_mux[] = {"peri_gpio_db_clk", "boot_clk"};
static const char * const sdmmc_free_mux[] = {"peri_sdmmc_clk", "boot_clk"};
static const char * const s2f_usr1_free_mux[] = {"peri_s2f_usr1_clk", "boot_clk"};
static const char * const psi_ref_free_mux[] = {"peri_psi_ref_clk", "boot_clk"};
static const char * const mpu_mux[] = { "mpu_free_clk", "boot_clk",};
static const char * const s2f_usr0_mux[] = {"f2s_free_clk", "boot_clk"};
static const char * const emac_mux[] = {"emaca_free_clk", "emacb_free_clk"};
static const char * const noc_mux[] = {"noc_free_clk", "boot_clk"};
/* clocks in AO (always on) controller */
static const struct stratix10_pll_clock s10_pll_clks[] = {
{ STRATIX10_BOOT_CLK, "boot_clk", boot_mux, ARRAY_SIZE(boot_mux), 0,
0x0},
{ STRATIX10_MAIN_PLL_CLK, "main_pll", pll_mux, ARRAY_SIZE(pll_mux),
0, 0x74},
{ STRATIX10_PERIPH_PLL_CLK, "periph_pll", pll_mux, ARRAY_SIZE(pll_mux),
0, 0xe4},
};
static const struct stratix10_perip_c_clock s10_main_perip_c_clks[] = {
{ STRATIX10_MAIN_MPU_BASE_CLK, "main_mpu_base_clk", "main_pll", NULL, 1, 0, 0x84},
{ STRATIX10_MAIN_NOC_BASE_CLK, "main_noc_base_clk", "main_pll", NULL, 1, 0, 0x88},
{ STRATIX10_PERI_MPU_BASE_CLK, "peri_mpu_base_clk", "periph_pll", NULL, 1, 0,
0xF4},
{ STRATIX10_PERI_NOC_BASE_CLK, "peri_noc_base_clk", "periph_pll", NULL, 1, 0,
0xF8},
};
static const struct stratix10_perip_cnt_clock s10_main_perip_cnt_clks[] = {
{ STRATIX10_MPU_FREE_CLK, "mpu_free_clk", NULL, cntr_mux, ARRAY_SIZE(cntr_mux),
0, 0x48, 0, 0, 0},
{ STRATIX10_NOC_FREE_CLK, "noc_free_clk", NULL, noc_free_mux, ARRAY_SIZE(noc_free_mux),
0, 0x4C, 0, 0, 0},
{ STRATIX10_MAIN_EMACA_CLK, "main_emaca_clk", "main_noc_base_clk", NULL, 1, 0,
0x50, 0, 0, 0},
{ STRATIX10_MAIN_EMACB_CLK, "main_emacb_clk", "main_noc_base_clk", NULL, 1, 0,
0x54, 0, 0, 0},
{ STRATIX10_MAIN_EMAC_PTP_CLK, "main_emac_ptp_clk", "main_noc_base_clk", NULL, 1, 0,
0x58, 0, 0, 0},
{ STRATIX10_MAIN_GPIO_DB_CLK, "main_gpio_db_clk", "main_noc_base_clk", NULL, 1, 0,
0x5C, 0, 0, 0},
{ STRATIX10_MAIN_SDMMC_CLK, "main_sdmmc_clk", "main_noc_base_clk", NULL, 1, 0,
0x60, 0, 0, 0},
{ STRATIX10_MAIN_S2F_USR0_CLK, "main_s2f_usr0_clk", NULL, cntr_mux, ARRAY_SIZE(cntr_mux),
0, 0x64, 0, 0, 0},
{ STRATIX10_MAIN_S2F_USR1_CLK, "main_s2f_usr1_clk", "main_noc_base_clk", NULL, 1, 0,
0x68, 0, 0, 0},
{ STRATIX10_MAIN_PSI_REF_CLK, "main_psi_ref_clk", "main_noc_base_clk", NULL, 1, 0,
0x6C, 0, 0, 0},
{ STRATIX10_PERI_EMACA_CLK, "peri_emaca_clk", NULL, cntr_mux, ARRAY_SIZE(cntr_mux),
0, 0xBC, 0, 0, 0},
{ STRATIX10_PERI_EMACB_CLK, "peri_emacb_clk", NULL, cntr_mux, ARRAY_SIZE(cntr_mux),
0, 0xC0, 0, 0, 0},
{ STRATIX10_PERI_EMAC_PTP_CLK, "peri_emac_ptp_clk", NULL, cntr_mux, ARRAY_SIZE(cntr_mux),
0, 0xC4, 0, 0, 0},
{ STRATIX10_PERI_GPIO_DB_CLK, "peri_gpio_db_clk", NULL, cntr_mux, ARRAY_SIZE(cntr_mux),
0, 0xC8, 0, 0, 0},
{ STRATIX10_PERI_SDMMC_CLK, "peri_sdmmc_clk", NULL, cntr_mux, ARRAY_SIZE(cntr_mux),
0, 0xCC, 0, 0, 0},
{ STRATIX10_PERI_S2F_USR0_CLK, "peri_s2f_usr0_clk", "peri_noc_base_clk", NULL, 1, 0,
0xD0, 0, 0, 0},
{ STRATIX10_PERI_S2F_USR1_CLK, "peri_s2f_usr1_clk", NULL, cntr_mux, ARRAY_SIZE(cntr_mux),
0, 0xD4, 0, 0, 0},
{ STRATIX10_PERI_PSI_REF_CLK, "peri_psi_ref_clk", "peri_noc_base_clk", NULL, 1, 0,
0xD8, 0, 0, 0},
{ STRATIX10_L4_SYS_FREE_CLK, "l4_sys_free_clk", "noc_free_clk", NULL, 1, 0,
0, 4, 0, 0},
{ STRATIX10_NOC_CLK, "noc_clk", NULL, noc_mux, ARRAY_SIZE(noc_mux),
0, 0, 0, 0x3C, 1},
{ STRATIX10_EMAC_A_FREE_CLK, "emaca_free_clk", NULL, emaca_free_mux, ARRAY_SIZE(emaca_free_mux),
0, 0, 4, 0xB0, 0},
{ STRATIX10_EMAC_B_FREE_CLK, "emacb_free_clk", NULL, emacb_free_mux, ARRAY_SIZE(emacb_free_mux),
0, 0, 4, 0xB0, 1},
{ STRATIX10_EMAC_PTP_FREE_CLK, "emac_ptp_free_clk", NULL, emac_ptp_free_mux,
ARRAY_SIZE(emac_ptp_free_mux), 0, 0, 4, 0xB0, 2},
{ STRATIX10_GPIO_DB_FREE_CLK, "gpio_db_free_clk", NULL, gpio_db_free_mux,
ARRAY_SIZE(gpio_db_free_mux), 0, 0, 0, 0xB0, 3},
{ STRATIX10_SDMMC_FREE_CLK, "sdmmc_free_clk", NULL, sdmmc_free_mux,
ARRAY_SIZE(sdmmc_free_mux), 0, 0, 0, 0xB0, 4},
{ STRATIX10_S2F_USER1_FREE_CLK, "s2f_user1_free_clk", NULL, s2f_usr1_free_mux,
ARRAY_SIZE(s2f_usr1_free_mux), 0, 0, 0, 0xB0, 5},
{ STRATIX10_PSI_REF_FREE_CLK, "psi_ref_free_clk", NULL, psi_ref_free_mux,
ARRAY_SIZE(psi_ref_free_mux), 0, 0, 0, 0xB0, 6},
};
static const struct stratix10_gate_clock s10_gate_clks[] = {
{ STRATIX10_MPU_CLK, "mpu_clk", NULL, mpu_mux, ARRAY_SIZE(mpu_mux), 0, 0x30,
0, 0, 0, 0, 0x3C, 0, 0},
{ STRATIX10_MPU_PERIPH_CLK, "mpu_periph_clk", "mpu_clk", NULL, 1, 0, 0x30,
0, 0, 0, 0, 0, 0, 4},
{ STRATIX10_MPU_L2RAM_CLK, "mpu_l2ram_clk", "mpu_clk", NULL, 1, 0, 0x30,
0, 0, 0, 0, 0, 0, 2},
{ STRATIX10_L4_MAIN_CLK, "l4_main_clk", "noc_clk", NULL, 1, 0, 0x30,
1, 0x70, 0, 2, 0, 0, 0},
{ STRATIX10_L4_MP_CLK, "l4_mp_clk", "noc_clk", NULL, 1, 0, 0x30,
2, 0x70, 8, 2, 0, 0, 0},
{ STRATIX10_L4_SP_CLK, "l4_sp_clk", "noc_clk", NULL, 1, CLK_IS_CRITICAL, 0x30,
3, 0x70, 16, 2, 0, 0, 0},
{ STRATIX10_CS_AT_CLK, "cs_at_clk", "noc_clk", NULL, 1, 0, 0x30,
4, 0x70, 24, 2, 0, 0, 0},
{ STRATIX10_CS_TRACE_CLK, "cs_trace_clk", "noc_clk", NULL, 1, 0, 0x30,
4, 0x70, 26, 2, 0, 0, 0},
{ STRATIX10_CS_PDBG_CLK, "cs_pdbg_clk", "cs_at_clk", NULL, 1, 0, 0x30,
4, 0x70, 28, 1, 0, 0, 0},
{ STRATIX10_CS_TIMER_CLK, "cs_timer_clk", "noc_clk", NULL, 1, 0, 0x30,
5, 0, 0, 0, 0, 0, 0},
{ STRATIX10_S2F_USER0_CLK, "s2f_user0_clk", NULL, s2f_usr0_mux, ARRAY_SIZE(s2f_usr0_mux), 0, 0x30,
6, 0, 0, 0, 0, 0, 0},
{ STRATIX10_EMAC0_CLK, "emac0_clk", NULL, emac_mux, ARRAY_SIZE(emac_mux), 0, 0xA4,
0, 0, 0, 0, 0xDC, 26, 0},
{ STRATIX10_EMAC1_CLK, "emac1_clk", NULL, emac_mux, ARRAY_SIZE(emac_mux), 0, 0xA4,
1, 0, 0, 0, 0xDC, 27, 0},
{ STRATIX10_EMAC2_CLK, "emac2_clk", NULL, emac_mux, ARRAY_SIZE(emac_mux), 0, 0xA4,
2, 0, 0, 0, 0xDC, 28, 0},
{ STRATIX10_EMAC_PTP_CLK, "emac_ptp_clk", "emac_ptp_free_clk", NULL, 1, 0, 0xA4,
3, 0, 0, 0, 0, 0, 0},
{ STRATIX10_GPIO_DB_CLK, "gpio_db_clk", "gpio_db_free_clk", NULL, 1, 0, 0xA4,
4, 0xE0, 0, 16, 0, 0, 0},
{ STRATIX10_SDMMC_CLK, "sdmmc_clk", "sdmmc_free_clk", NULL, 1, 0, 0xA4,
5, 0, 0, 0, 0, 0, 4},
{ STRATIX10_S2F_USER1_CLK, "s2f_user1_clk", "s2f_user1_free_clk", NULL, 1, 0, 0xA4,
6, 0, 0, 0, 0, 0, 0},
{ STRATIX10_PSI_REF_CLK, "psi_ref_clk", "psi_ref_free_clk", NULL, 1, 0, 0xA4,
7, 0, 0, 0, 0, 0, 0},
{ STRATIX10_USB_CLK, "usb_clk", "l4_mp_clk", NULL, 1, 0, 0xA4,
8, 0, 0, 0, 0, 0, 0},
{ STRATIX10_SPI_M_CLK, "spi_m_clk", "l4_mp_clk", NULL, 1, 0, 0xA4,
9, 0, 0, 0, 0, 0, 0},
{ STRATIX10_NAND_CLK, "nand_clk", "l4_main_clk", NULL, 1, 0, 0xA4,
10, 0, 0, 0, 0, 0, 0},
};
static int s10_clk_register_c_perip(const struct stratix10_perip_c_clock *clks,
int nums, struct stratix10_clock_data *data)
{
struct clk *clk;
void __iomem *base = data->base;
int i;
for (i = 0; i < nums; i++) {
clk = s10_register_periph(clks[i].name, clks[i].parent_name,
clks[i].parent_names, clks[i].num_parents,
clks[i].flags, base, clks[i].offset);
if (IS_ERR(clk)) {
pr_err("%s: failed to register clock %s\n",
__func__, clks[i].name);
continue;
}
data->clk_data.clks[clks[i].id] = clk;
}
return 0;
}
static int s10_clk_register_cnt_perip(const struct stratix10_perip_cnt_clock *clks,
int nums, struct stratix10_clock_data *data)
{
struct clk *clk;
void __iomem *base = data->base;
int i;
for (i = 0; i < nums; i++) {
clk = s10_register_cnt_periph(clks[i].name, clks[i].parent_name,
clks[i].parent_names,
clks[i].num_parents,
clks[i].flags, base,
clks[i].offset,
clks[i].fixed_divider,
clks[i].bypass_reg,
clks[i].bypass_shift);
if (IS_ERR(clk)) {
pr_err("%s: failed to register clock %s\n",
__func__, clks[i].name);
continue;
}
data->clk_data.clks[clks[i].id] = clk;
}
return 0;
}
static int s10_clk_register_gate(const struct stratix10_gate_clock *clks,
int nums, struct stratix10_clock_data *data)
{
struct clk *clk;
void __iomem *base = data->base;
int i;
for (i = 0; i < nums; i++) {
clk = s10_register_gate(clks[i].name, clks[i].parent_name,
clks[i].parent_names,
clks[i].num_parents,
clks[i].flags, base,
clks[i].gate_reg,
clks[i].gate_idx, clks[i].div_reg,
clks[i].div_offset, clks[i].div_width,
clks[i].bypass_reg,
clks[i].bypass_shift,
clks[i].fixed_div);
if (IS_ERR(clk)) {
pr_err("%s: failed to register clock %s\n",
__func__, clks[i].name);
continue;
}
data->clk_data.clks[clks[i].id] = clk;
}
return 0;
}
static int s10_clk_register_pll(const struct stratix10_pll_clock *clks,
int nums, struct stratix10_clock_data *data)
{
struct clk *clk;
void __iomem *base = data->base;
int i;
for (i = 0; i < nums; i++) {
clk = s10_register_pll(clks[i].name, clks[i].parent_names,
clks[i].num_parents,
clks[i].flags, base,
clks[i].offset);
if (IS_ERR(clk)) {
pr_err("%s: failed to register clock %s\n",
__func__, clks[i].name);
continue;
}
data->clk_data.clks[clks[i].id] = clk;
}
return 0;
}
static struct stratix10_clock_data *__socfpga_s10_clk_init(struct device_node *np,
int nr_clks)
{
struct stratix10_clock_data *clk_data;
struct clk **clk_table;
void __iomem *base;
base = of_iomap(np, 0);
if (!base) {
pr_err("%s: failed to map clock registers\n", __func__);
goto err;
}
clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
if (!clk_data)
goto err;
clk_data->base = base;
clk_table = kcalloc(nr_clks, sizeof(*clk_table), GFP_KERNEL);
if (!clk_table)
goto err_data;
clk_data->clk_data.clks = clk_table;
clk_data->clk_data.clk_num = nr_clks;
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data->clk_data);
return clk_data;
err_data:
kfree(clk_data);
err:
return NULL;
}
static int s10_clkmgr_init(struct device_node *np)
{
struct stratix10_clock_data *clk_data;
clk_data = __socfpga_s10_clk_init(np, STRATIX10_NUM_CLKS);
if (!clk_data)
return -ENOMEM;
s10_clk_register_pll(s10_pll_clks, ARRAY_SIZE(s10_pll_clks), clk_data);
s10_clk_register_c_perip(s10_main_perip_c_clks,
ARRAY_SIZE(s10_main_perip_c_clks), clk_data);
s10_clk_register_cnt_perip(s10_main_perip_cnt_clks,
ARRAY_SIZE(s10_main_perip_cnt_clks),
clk_data);
s10_clk_register_gate(s10_gate_clks, ARRAY_SIZE(s10_gate_clks),
clk_data);
return 0;
}
static int s10_clkmgr_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
s10_clkmgr_init(np);
return 0;
}
static const struct of_device_id stratix10_clkmgr_match_table[] = {
{ .compatible = "intel,stratix10-clkmgr",
.data = s10_clkmgr_init },
{ }
};
static struct platform_driver stratix10_clkmgr_driver = {
.probe = s10_clkmgr_probe,
.driver = {
.name = "stratix10-clkmgr",
.of_match_table = stratix10_clkmgr_match_table,
},
};
static int __init s10_clk_init(void)
{
return platform_driver_register(&stratix10_clkmgr_driver);
}
core_initcall(s10_clk_init);
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