diff options
Diffstat (limited to 'drivers/clk/hisilicon/crg-hi3516cv300.c')
| -rw-r--r-- | drivers/clk/hisilicon/crg-hi3516cv300.c | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/drivers/clk/hisilicon/crg-hi3516cv300.c b/drivers/clk/hisilicon/crg-hi3516cv300.c new file mode 100644 index 000000000000..2007123832bb --- /dev/null +++ b/drivers/clk/hisilicon/crg-hi3516cv300.c @@ -0,0 +1,330 @@ +/* + * Hi3516CV300 Clock and Reset Generator Driver + * + * Copyright (c) 2016 HiSilicon Technologies Co., Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <dt-bindings/clock/hi3516cv300-clock.h> +#include <linux/clk-provider.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include "clk.h" +#include "crg.h" +#include "reset.h" + +/* hi3516CV300 core CRG */ +#define HI3516CV300_INNER_CLK_OFFSET 64 +#define HI3516CV300_FIXED_3M 65 +#define HI3516CV300_FIXED_6M 66 +#define HI3516CV300_FIXED_24M 67 +#define HI3516CV300_FIXED_49P5 68 +#define HI3516CV300_FIXED_50M 69 +#define HI3516CV300_FIXED_83P3M 70 +#define HI3516CV300_FIXED_99M 71 +#define HI3516CV300_FIXED_100M 72 +#define HI3516CV300_FIXED_148P5M 73 +#define HI3516CV300_FIXED_198M 74 +#define HI3516CV300_FIXED_297M 75 +#define HI3516CV300_UART_MUX 76 +#define HI3516CV300_FMC_MUX 77 +#define HI3516CV300_MMC0_MUX 78 +#define HI3516CV300_MMC1_MUX 79 +#define HI3516CV300_MMC2_MUX 80 +#define HI3516CV300_MMC3_MUX 81 +#define HI3516CV300_PWM_MUX 82 +#define HI3516CV300_CRG_NR_CLKS 128 + +static const struct hisi_fixed_rate_clock hi3516cv300_fixed_rate_clks[] = { + { HI3516CV300_FIXED_3M, "3m", NULL, 0, 3000000, }, + { HI3516CV300_FIXED_6M, "6m", NULL, 0, 6000000, }, + { HI3516CV300_FIXED_24M, "24m", NULL, 0, 24000000, }, + { HI3516CV300_FIXED_49P5, "49.5m", NULL, 0, 49500000, }, + { HI3516CV300_FIXED_50M, "50m", NULL, 0, 50000000, }, + { HI3516CV300_FIXED_83P3M, "83.3m", NULL, 0, 83300000, }, + { HI3516CV300_FIXED_99M, "99m", NULL, 0, 99000000, }, + { HI3516CV300_FIXED_100M, "100m", NULL, 0, 100000000, }, + { HI3516CV300_FIXED_148P5M, "148.5m", NULL, 0, 148500000, }, + { HI3516CV300_FIXED_198M, "198m", NULL, 0, 198000000, }, + { HI3516CV300_FIXED_297M, "297m", NULL, 0, 297000000, }, + { HI3516CV300_APB_CLK, "apb", NULL, 0, 50000000, }, +}; + +static const char *const uart_mux_p[] = {"24m", "6m"}; +static const char *const fmc_mux_p[] = { + "24m", "83.3m", "148.5m", "198m", "297m" +}; +static const char *const mmc_mux_p[] = {"49.5m"}; +static const char *const mmc2_mux_p[] = {"99m", "49.5m"}; +static const char *const pwm_mux_p[] = {"3m", "50m", "24m", "24m"}; + +static u32 uart_mux_table[] = {0, 1}; +static u32 fmc_mux_table[] = {0, 1, 2, 3, 4}; +static u32 mmc_mux_table[] = {0}; +static u32 mmc2_mux_table[] = {0, 2}; +static u32 pwm_mux_table[] = {0, 1, 2, 3}; + +static const struct hisi_mux_clock hi3516cv300_mux_clks[] = { + { HI3516CV300_UART_MUX, "uart_mux", uart_mux_p, ARRAY_SIZE(uart_mux_p), + CLK_SET_RATE_PARENT, 0xe4, 19, 1, 0, uart_mux_table, }, + { HI3516CV300_FMC_MUX, "fmc_mux", fmc_mux_p, ARRAY_SIZE(fmc_mux_p), + CLK_SET_RATE_PARENT, 0xc0, 2, 3, 0, fmc_mux_table, }, + { HI3516CV300_MMC0_MUX, "mmc0_mux", mmc_mux_p, ARRAY_SIZE(mmc_mux_p), + CLK_SET_RATE_PARENT, 0xc4, 4, 2, 0, mmc_mux_table, }, + { HI3516CV300_MMC1_MUX, "mmc1_mux", mmc_mux_p, ARRAY_SIZE(mmc_mux_p), + CLK_SET_RATE_PARENT, 0xc4, 12, 2, 0, mmc_mux_table, }, + { HI3516CV300_MMC2_MUX, "mmc2_mux", mmc2_mux_p, ARRAY_SIZE(mmc2_mux_p), + CLK_SET_RATE_PARENT, 0xc4, 20, 2, 0, mmc2_mux_table, }, + { HI3516CV300_MMC3_MUX, "mmc3_mux", mmc_mux_p, ARRAY_SIZE(mmc_mux_p), + CLK_SET_RATE_PARENT, 0xc8, 4, 2, 0, mmc_mux_table, }, + { HI3516CV300_PWM_MUX, "pwm_mux", pwm_mux_p, ARRAY_SIZE(pwm_mux_p), + CLK_SET_RATE_PARENT, 0x38, 2, 2, 0, pwm_mux_table, }, +}; + +static const struct hisi_gate_clock hi3516cv300_gate_clks[] = { + + { HI3516CV300_UART0_CLK, "clk_uart0", "uart_mux", CLK_SET_RATE_PARENT, + 0xe4, 15, 0, }, + { HI3516CV300_UART1_CLK, "clk_uart1", "uart_mux", CLK_SET_RATE_PARENT, + 0xe4, 16, 0, }, + { HI3516CV300_UART2_CLK, "clk_uart2", "uart_mux", CLK_SET_RATE_PARENT, + 0xe4, 17, 0, }, + + { HI3516CV300_SPI0_CLK, "clk_spi0", "100m", CLK_SET_RATE_PARENT, + 0xe4, 13, 0, }, + { HI3516CV300_SPI1_CLK, "clk_spi1", "100m", CLK_SET_RATE_PARENT, + 0xe4, 14, 0, }, + + { HI3516CV300_FMC_CLK, "clk_fmc", "fmc_mux", CLK_SET_RATE_PARENT, + 0xc0, 1, 0, }, + { HI3516CV300_MMC0_CLK, "clk_mmc0", "mmc0_mux", CLK_SET_RATE_PARENT, + 0xc4, 1, 0, }, + { HI3516CV300_MMC1_CLK, "clk_mmc1", "mmc1_mux", CLK_SET_RATE_PARENT, + 0xc4, 9, 0, }, + { HI3516CV300_MMC2_CLK, "clk_mmc2", "mmc2_mux", CLK_SET_RATE_PARENT, + 0xc4, 17, 0, }, + { HI3516CV300_MMC3_CLK, "clk_mmc3", "mmc3_mux", CLK_SET_RATE_PARENT, + 0xc8, 1, 0, }, + + { HI3516CV300_ETH_CLK, "clk_eth", NULL, 0, 0xec, 1, 0, }, + + { HI3516CV300_DMAC_CLK, "clk_dmac", NULL, 0, 0xd8, 5, 0, }, + { HI3516CV300_PWM_CLK, "clk_pwm", "pwm_mux", CLK_SET_RATE_PARENT, + 0x38, 1, 0, }, + + { HI3516CV300_USB2_BUS_CLK, "clk_usb2_bus", NULL, 0, 0xb8, 0, 0, }, + { HI3516CV300_USB2_OHCI48M_CLK, "clk_usb2_ohci48m", NULL, 0, + 0xb8, 1, 0, }, + { HI3516CV300_USB2_OHCI12M_CLK, "clk_usb2_ohci12m", NULL, 0, + 0xb8, 2, 0, }, + { HI3516CV300_USB2_OTG_UTMI_CLK, "clk_usb2_otg_utmi", NULL, 0, + 0xb8, 3, 0, }, + { HI3516CV300_USB2_HST_PHY_CLK, "clk_usb2_hst_phy", NULL, 0, + 0xb8, 4, 0, }, + { HI3516CV300_USB2_UTMI0_CLK, "clk_usb2_utmi0", NULL, 0, 0xb8, 5, 0, }, + { HI3516CV300_USB2_PHY_CLK, "clk_usb2_phy", NULL, 0, 0xb8, 7, 0, }, +}; + +static struct hisi_clock_data *hi3516cv300_clk_register( + struct platform_device *pdev) +{ + struct hisi_clock_data *clk_data; + int ret; + + clk_data = hisi_clk_alloc(pdev, HI3516CV300_CRG_NR_CLKS); + if (!clk_data) + return ERR_PTR(-ENOMEM); + + ret = hisi_clk_register_fixed_rate(hi3516cv300_fixed_rate_clks, + ARRAY_SIZE(hi3516cv300_fixed_rate_clks), clk_data); + if (ret) + return ERR_PTR(ret); + + ret = hisi_clk_register_mux(hi3516cv300_mux_clks, + ARRAY_SIZE(hi3516cv300_mux_clks), clk_data); + if (ret) + goto unregister_fixed_rate; + + ret = hisi_clk_register_gate(hi3516cv300_gate_clks, + ARRAY_SIZE(hi3516cv300_gate_clks), clk_data); + if (ret) + goto unregister_mux; + + ret = of_clk_add_provider(pdev->dev.of_node, + of_clk_src_onecell_get, &clk_data->clk_data); + if (ret) + goto unregister_gate; + + return clk_data; + +unregister_gate: + hisi_clk_unregister_gate(hi3516cv300_gate_clks, + ARRAY_SIZE(hi3516cv300_gate_clks), clk_data); +unregister_mux: + hisi_clk_unregister_mux(hi3516cv300_mux_clks, + ARRAY_SIZE(hi3516cv300_mux_clks), clk_data); +unregister_fixed_rate: + hisi_clk_unregister_fixed_rate(hi3516cv300_fixed_rate_clks, + ARRAY_SIZE(hi3516cv300_fixed_rate_clks), clk_data); + return ERR_PTR(ret); +} + +static void hi3516cv300_clk_unregister(struct platform_device *pdev) +{ + struct hisi_crg_dev *crg = platform_get_drvdata(pdev); + + of_clk_del_provider(pdev->dev.of_node); + + hisi_clk_unregister_gate(hi3516cv300_gate_clks, + ARRAY_SIZE(hi3516cv300_gate_clks), crg->clk_data); + hisi_clk_unregister_mux(hi3516cv300_mux_clks, + ARRAY_SIZE(hi3516cv300_mux_clks), crg->clk_data); + hisi_clk_unregister_fixed_rate(hi3516cv300_fixed_rate_clks, + ARRAY_SIZE(hi3516cv300_fixed_rate_clks), crg->clk_data); +} + +static const struct hisi_crg_funcs hi3516cv300_crg_funcs = { + .register_clks = hi3516cv300_clk_register, + .unregister_clks = hi3516cv300_clk_unregister, +}; + +/* hi3516CV300 sysctrl CRG */ +#define HI3516CV300_SYSCTRL_NR_CLKS 16 + +static const char *wdt_mux_p[] __initconst = { "3m", "apb" }; +static u32 wdt_mux_table[] = {0, 1}; + +static const struct hisi_mux_clock hi3516cv300_sysctrl_mux_clks[] = { + { HI3516CV300_WDT_CLK, "wdt", wdt_mux_p, ARRAY_SIZE(wdt_mux_p), + CLK_SET_RATE_PARENT, 0x0, 23, 1, 0, wdt_mux_table, }, +}; + +static struct hisi_clock_data *hi3516cv300_sysctrl_clk_register( + struct platform_device *pdev) +{ + struct hisi_clock_data *clk_data; + int ret; + + clk_data = hisi_clk_alloc(pdev, HI3516CV300_SYSCTRL_NR_CLKS); + if (!clk_data) + return ERR_PTR(-ENOMEM); + + ret = hisi_clk_register_mux(hi3516cv300_sysctrl_mux_clks, + ARRAY_SIZE(hi3516cv300_sysctrl_mux_clks), clk_data); + if (ret) + return ERR_PTR(ret); + + + ret = of_clk_add_provider(pdev->dev.of_node, + of_clk_src_onecell_get, &clk_data->clk_data); + if (ret) + goto unregister_mux; + + return clk_data; + +unregister_mux: + hisi_clk_unregister_mux(hi3516cv300_sysctrl_mux_clks, + ARRAY_SIZE(hi3516cv300_sysctrl_mux_clks), clk_data); + return ERR_PTR(ret); +} + +static void hi3516cv300_sysctrl_clk_unregister(struct platform_device *pdev) +{ + struct hisi_crg_dev *crg = platform_get_drvdata(pdev); + + of_clk_del_provider(pdev->dev.of_node); + + hisi_clk_unregister_mux(hi3516cv300_sysctrl_mux_clks, + ARRAY_SIZE(hi3516cv300_sysctrl_mux_clks), + crg->clk_data); +} + +static const struct hisi_crg_funcs hi3516cv300_sysctrl_funcs = { + .register_clks = hi3516cv300_sysctrl_clk_register, + .unregister_clks = hi3516cv300_sysctrl_clk_unregister, +}; + +static const struct of_device_id hi3516cv300_crg_match_table[] = { + { + .compatible = "hisilicon,hi3516cv300-crg", + .data = &hi3516cv300_crg_funcs + }, + { + .compatible = "hisilicon,hi3516cv300-sysctrl", + .data = &hi3516cv300_sysctrl_funcs + }, + { } +}; +MODULE_DEVICE_TABLE(of, hi3516cv300_crg_match_table); + +static int hi3516cv300_crg_probe(struct platform_device *pdev) +{ + struct hisi_crg_dev *crg; + + crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL); + if (!crg) + return -ENOMEM; + + crg->funcs = of_device_get_match_data(&pdev->dev); + if (!crg->funcs) + return -ENOENT; + + crg->rstc = hisi_reset_init(pdev); + if (!crg->rstc) + return -ENOMEM; + + crg->clk_data = crg->funcs->register_clks(pdev); + if (IS_ERR(crg->clk_data)) { + hisi_reset_exit(crg->rstc); + return PTR_ERR(crg->clk_data); + } + + platform_set_drvdata(pdev, crg); + return 0; +} + +static int hi3516cv300_crg_remove(struct platform_device *pdev) +{ + struct hisi_crg_dev *crg = platform_get_drvdata(pdev); + + hisi_reset_exit(crg->rstc); + crg->funcs->unregister_clks(pdev); + return 0; +} + +static struct platform_driver hi3516cv300_crg_driver = { + .probe = hi3516cv300_crg_probe, + .remove = hi3516cv300_crg_remove, + .driver = { + .name = "hi3516cv300-crg", + .of_match_table = hi3516cv300_crg_match_table, + }, +}; + +static int __init hi3516cv300_crg_init(void) +{ + return platform_driver_register(&hi3516cv300_crg_driver); +} +core_initcall(hi3516cv300_crg_init); + +static void __exit hi3516cv300_crg_exit(void) +{ + platform_driver_unregister(&hi3516cv300_crg_driver); +} +module_exit(hi3516cv300_crg_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("HiSilicon Hi3516CV300 CRG Driver"); 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