[PATCH 1/2] clk: hisilicon: add CRG driver Hi3521a SoC

Marty E. Plummer
2022-05-01T05:16:07Z

Add CRG driver for Hi3521A SoC. CRG (Clock and Reset Generator) module
generates clock and reset signals used by other module blocks on SoC.

Signed-off-by: Marty E. Plummer <hanetzer@startmail.com>
---
drivers/clk/hisilicon/Kconfig | 8 ++
drivers/clk/hisilicon/Makefile | 1 +
drivers/clk/hisilicon/crg-hi3521a.c | 141 ++++++++++++++++++++++
include/dt-bindings/clock/hi3521a-clock.h | 34 ++++++
4 files changed, 184 insertions(+)
create mode 100644 drivers/clk/hisilicon/crg-hi3521a.c
create mode 100644 include/dt-bindings/clock/hi3521a-clock.h

diff --git a/drivers/clk/hisilicon/Kconfig b/drivers/clk/hisilicon/Kconfig
index c1ec75aa4ccd..72435c06bf4d 100644
--- a/drivers/clk/hisilicon/Kconfig
+++ b/drivers/clk/hisilicon/Kconfig
@@ -15,6 +15,14 @@ config COMMON_CLK_HI3519
help
Build the clock driver for hi3519.

+config COMMON_CLK_HI3521A
+ tristate "Hi3521a Clock Driver"
+ depends on ARCH_HISI || COMPILE_TEST
+ select RESET_HISI
+ default ARCH_HISI
+ help
+ Build the clock driver for hi3521a.
+
config COMMON_CLK_HI3559A
bool "Hi3559A Clock Driver"
depends on ARCH_HISI || COMPILE_TEST
diff --git a/drivers/clk/hisilicon/Makefile b/drivers/clk/hisilicon/Makefile
index 2978e56cb876..dc27acc5b885 100644
--- a/drivers/clk/hisilicon/Makefile
+++ b/drivers/clk/hisilicon/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_ARCH_HIP04) += clk-hip04.o
obj-$(CONFIG_ARCH_HIX5HD2) += clk-hix5hd2.o
obj-$(CONFIG_COMMON_CLK_HI3516CV300) += crg-hi3516cv300.o
obj-$(CONFIG_COMMON_CLK_HI3519) += clk-hi3519.o
+obj-$(CONFIG_COMMON_CLK_HI3521A) += crg-hi3521a.o
obj-$(CONFIG_COMMON_CLK_HI3559A) += clk-hi3559a.o
obj-$(CONFIG_COMMON_CLK_HI3660) += clk-hi3660.o
obj-$(CONFIG_COMMON_CLK_HI3670) += clk-hi3670.o
diff --git a/drivers/clk/hisilicon/crg-hi3521a.c b/drivers/clk/hisilicon/crg-hi3521a.c
new file mode 100644
index 000000000000..42d8ff440f07
--- /dev/null
+++ b/drivers/clk/hisilicon/crg-hi3521a.c
@@ -0,0 +1,141 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2017-2022 Marty E. Plummer <hanetzer@startmail.com>
+ */
+#include <linux/clk-provider.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include <dt-bindings/clock/hi3521a-clock.h>
+
+#include "clk.h"
+#include "crg.h"
+#include "reset.h"
+
+#define HI3521A_INNER_CLK_OFFSET 64
+#define HI3521A_FIXED_2M 65
+#define HI3521A_FIXED_24M 66
+#define HI3521A_FIXED_50M 67
+#define HI3521A_FIXED_83M 68
+#define HI3521A_FIXED_100M 69
+#define HI3521A_FIXED_150M 70
+#define HI3521A_FIXED_202P5M 71
+#define HI3521A_FIXED_250M 72
+#define HI3521A_SYSAXI_MUX 73
+#define HI3521A_FMC_MUX 74
+#define HI3521A_UART_MUX 75
+#define HI3521A_SP804_CLK 76
+
+#define HI3521A_NR_CLKS 128
+
+static const struct hisi_fixed_rate_clock hi3521a_fixed_rate_clks[] = {
+ { HI3521A_FIXED_2M, "2m", NULL, 0, 2000000, },
+ { HI3521A_FIXED_3M, "3m", NULL, 0, 3000000, },
+ { HI3521A_FIXED_24M, "24m", NULL, 0, 24000000, },
+ { HI3521A_FIXED_50M, "50m", NULL, 0, 50000000, },
+ { HI3521A_FIXED_83M, "83m", NULL, 0, 83000000, },
+ { HI3521A_FIXED_100M, "100m", NULL, 0, 100000000, },
+ { HI3521A_FIXED_150M, "150m", NULL, 0, 150000000, },
+ { HI3521A_FIXED_202P5M, "202p5m", NULL, 0, 202500000, },
+ { HI3521A_FIXED_250M, "250m", NULL, 0, 250000000, },
+};
+
+static const char *const sysaxi_mux_p[] = { "24m", "250m", "202p5m", };
+static const char *const uart_mux_p[] = { "apb", "2m", "24m", };
+static const char *const fmc_mux_p[] = { "24m", "83m", "150m", };
+static const char *const timer_mux_p[] = { "3m", "clk_sp804", };
+
+static const u32 sysaxi_mux_table[] = {0, 1, 2};
+static const u32 uart_mux_table[] = {0, 1, 2};
+static const u32 fmc_mux_table[] = {0, 1, 2};
+static const u32 timer_mux_table[] = {0, 1};
+
+static const struct hisi_mux_clock hi3521a_mux_clks[] = {
+ { HI3521A_APB_CLK, "apb", sysaxi_mux_p, ARRAY_SIZE(sysaxi_mux_p),
+ CLK_SET_RATE_PARENT, 0x34, 12, 2, 0, sysaxi_mux_table, },
+ { HI3521A_UART_MUX, "uart_mux", uart_mux_p, ARRAY_SIZE(uart_mux_p),
+ CLK_SET_RATE_PARENT, 0x84, 18, 2, 0, uart_mux_table, },
+ { HI3521A_FMC_MUX, "fmc_mux", fmc_mux_p, ARRAY_SIZE(fmc_mux_p),
+ CLK_SET_RATE_PARENT, 0x74, 2, 2, 0, fmc_mux_table, },
+};
+
+static const struct hisi_gate_clock hi3521a_gate_clks[] = {
+ { HI3521A_FMC_CLK, "clk_fmc", "fmc_mux", CLK_SET_RATE_PARENT,
+ 0x74, 1, 0, },
+ { HI3521A_ETH_CLK, "clk_eth", NULL, 0, 0x78, 1, 0, },
+ { HI3521A_ETH_MACIF_CLK, "clk_eth_macif", NULL, 0x78, 3, 0, },
+ { HI3521A_DMAC_CLK, "clk_dmac", NULL, 0, 0x80, 5, 0, },
+ { HI3521A_UART0_CLK, "clk_uart0", "uart_mux", CLK_SET_RATE_PARENT,
+ 0x84, 15, 0, },
+ { HI3521A_UART1_CLK, "clk_uart1", "uart_mux", CLK_SET_RATE_PARENT,
+ 0x84, 16, 0, },
+ { HI3521A_UART2_CLK, "clk_uart2", "uart_mux", CLK_SET_RATE_PARENT,
+ 0x84, 17, 0, },
+ { HI3521A_SPI0_CLK, "clk_spi0", "50m", CLK_SET_RATE_PARENT,
+ 0x84, 13, 0, },
+};
+
+static const struct hisi_fixed_factor_clock hi3521a_fixed_factor_clks[] = {
+ { HI3521A_SP804_CLK, "clk_sp804", "apb", 1, 4, CLK_SET_RATE_PARENT },
+};
+
+static void __init hi3521a_crg_init(struct device_node *np)
+{
+ struct hisi_clock_data *clk_data;
+
+ clk_data = hisi_clk_init(np, HI3521A_NR_CLKS);
+ if (!clk_data)
+ return;
+
+ hisi_clk_register_fixed_rate(hi3521a_fixed_rate_clks,
+ ARRAY_SIZE(hi3521a_fixed_rate_clks),
+ clk_data);
+ hisi_clk_register_mux(hi3521a_mux_clks,
+ ARRAY_SIZE(hi3521a_mux_clks),
+ clk_data);
+ hisi_clk_register_gate(hi3521a_gate_clks,
+ ARRAY_SIZE(hi3521a_gate_clks),
+ clk_data);
+ hisi_clk_register_fixed_factor(hi3521a_fixed_factor_clks,
+ ARRAY_SIZE(hi3521a_fixed_factor_clks),
+ clk_data);
+}
+CLK_OF_DECLARE(hi3521a_clk, "hisilicon,hi3521a-crg", hi3521a_crg_init);
+
+#define HI3521A_SYSCTRL_NR_CLKS 16
+
+static const struct hisi_mux_clock hi3521a_sysctrl_mux_clks[] = {
+ { HI3521A_TIMER0_CLK, "clk_timer0", timer_mux_p, ARRAY_SIZE(timer_mux_p),
+ CLK_SET_RATE_PARENT, 0, 16, 1, 0, timer_mux_table, },
+ { HI3521A_TIMER1_CLK, "clk_timer1", timer_mux_p, ARRAY_SIZE(timer_mux_p),
+ CLK_SET_RATE_PARENT, 0, 18, 1, 0, timer_mux_table, },
+ { HI3521A_TIMER2_CLK, "clk_timer2", timer_mux_p, ARRAY_SIZE(timer_mux_p),
+ CLK_SET_RATE_PARENT, 0, 20, 1, 0, timer_mux_table, },
+ { HI3521A_TIMER3_CLK, "clk_timer3", timer_mux_p, ARRAY_SIZE(timer_mux_p),
+ CLK_SET_RATE_PARENT, 0, 22, 1, 0, timer_mux_table, },
+ { HI3521A_TIMER4_CLK, "clk_timer4", timer_mux_p, ARRAY_SIZE(timer_mux_p),
+ CLK_SET_RATE_PARENT, 0, 25, 1, 0, timer_mux_table, },
+ { HI3521A_TIMER5_CLK, "clk_timer5", timer_mux_p, ARRAY_SIZE(timer_mux_p),
+ CLK_SET_RATE_PARENT, 0, 27, 1, 0, timer_mux_table, },
+ { HI3521A_TIMER6_CLK, "clk_timer6", timer_mux_p, ARRAY_SIZE(timer_mux_p),
+ CLK_SET_RATE_PARENT, 0, 29, 1, 0, timer_mux_table, },
+ { HI3521A_TIMER7_CLK, "clk_timer7", timer_mux_p, ARRAY_SIZE(timer_mux_p),
+ CLK_SET_RATE_PARENT, 0, 31, 1, 0, timer_mux_table, },
+};
+
+static void __init hi3521a_sysctrl_init(struct device_node *np)
+{
+ struct hisi_clock_data *clk_data;
+
+ clk_data = hisi_clk_init(np, HI3521A_SYSCTRL_NR_CLKS);
+ if (!clk_data)
+ return;
+
+ hisi_clk_register_mux(hi3521a_sysctrl_mux_clks,
+ ARRAY_SIZE(hi3521a_sysctrl_mux_clks),
+ clk_data);
+}
+CLK_OF_DECLARE(hi3521a_sysctrl, "hisilicon,hi3521a-sysctrl", hi3521a_sysctrl_init);
diff --git a/include/dt-bindings/clock/hi3521a-clock.h b/include/dt-bindings/clock/hi3521a-clock.h
new file mode 100644
index 000000000000..416a08079002
--- /dev/null
+++ b/include/dt-bindings/clock/hi3521a-clock.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2017-2022 Marty E. Plummer <hanetzer@startmail.com>
+ */
+
+#ifndef __DTS_HI3521A_CLOCK_H
+#define __DTS_HI3521A_CLOCK_H
+
+/* clocks provided by the crg */
+#define HI3521A_FIXED_3M 1
+#define HI3521A_FMC_CLK 2
+#define HI3521A_SPI0_CLK 3
+#define HI3521A_UART0_CLK 4
+#define HI3521A_UART1_CLK 5
+#define HI3521A_UART2_CLK 6
+#define HI3521A_DMAC_CLK 7
+#define HI3521A_IR_CLK 8
+#define HI3521A_ETH_CLK 9
+#define HI3521A_ETH_MACIF_CLK 10
+#define HI3521A_USB2_BUS_CLK 11
+#define HI3521A_USB2_PORT_CLK 12
+#define HI3521A_APB_CLK 13
+
+/* clocks provided by the sysctrl */
+#define HI3521A_TIMER0_CLK 1
+#define HI3521A_TIMER1_CLK 2
+#define HI3521A_TIMER2_CLK 3
+#define HI3521A_TIMER3_CLK 4
+#define HI3521A_TIMER4_CLK 5
+#define HI3521A_TIMER5_CLK 6
+#define HI3521A_TIMER6_CLK 7
+#define HI3521A_TIMER7_CLK 8
+
+#endif /* __DTS_HI3521A_CLK_H */
--
2.35.1