[RFC RESEND 1/3] clk: hisilicon: add CRG driver Hi3521A SoC

From: Marty E. Plummer
Date: Sun Sep 17 2017 - 04:34:49 EST

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@xxxxxxxxxxxxx>
---
drivers/clk/hisilicon/Kconfig | 7 +
drivers/clk/hisilicon/Makefile | 1 +
drivers/clk/hisilicon/crg-hi3521a.c | 207 ++++++++++++++++++++++++++++++
include/dt-bindings/clock/hi3521a-clock.h | 34 +++++
4 files changed, 249 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 7098bfd32b1b..d93e3180a04f 100644
--- a/drivers/clk/hisilicon/Kconfig
+++ b/drivers/clk/hisilicon/Kconfig
@@ -14,6 +14,13 @@ config COMMON_CLK_HI3519
help
Build the clock driver for hi3519.

+config COMMON_CLK_HI3521A
+ bool "Hi3521A/Hi3520DV300 Clock Driver"
+ depends on ARCH_HISI || COMPILE_TEST
+ default ARCH_HISI
+ help
+ Build the clock driver for hi3521a/hi3520dv300
+
config COMMON_CLK_HI3660
bool "Hi3660 Clock Driver"
depends on ARCH_HISI || COMPILE_TEST
diff --git a/drivers/clk/hisilicon/Makefile b/drivers/clk/hisilicon/Makefile
index 1e4c3ddbad84..46f8d619c923 100644
--- a/drivers/clk/hisilicon/Makefile
+++ b/drivers/clk/hisilicon/Makefile
@@ -9,6 +9,7 @@ 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_HI3660) += clk-hi3660.o
obj-$(CONFIG_COMMON_CLK_HI3798CV200) += crg-hi3798cv200.o
obj-$(CONFIG_COMMON_CLK_HI6220) += clk-hi6220.o
diff --git a/drivers/clk/hisilicon/crg-hi3521a.c b/drivers/clk/hisilicon/crg-hi3521a.c
new file mode 100644
index 000000000000..8c03ce2694c1
--- /dev/null
+++ b/drivers/clk/hisilicon/crg-hi3521a.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) 2017 Marty E. Plummer <hanetzer@xxxxxxxxxxxxx>
+ *
+ * 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 3 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/hi3521a-clock.h>
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include "clk.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_FMC_MUX 71
+#define HI3521A_UART_MUX 72
+
+#define HI3521A_NR_CLKS 128
+
+struct hi3521a_crg_data {
+ struct hisi_clock_data *clk_data;
+ struct hisi_reset_controller *rstc;
+};
+
+static const struct hisi_fixed_rate_clock hi3521a_fixed_rate_clks[] = {
+ { HI3521A_FIXED_2M, "2m", NULL, 0, 2000000, },
+ { 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, },
+};
+
+static const char *const uart_mux_p[] = { "50m", "2m", "24m", };
+static const char *const fmc_mux_p[] = { "24m", "83m", "150m", };
+
+static u32 uart_mux_table[] = {0, 1, 2};
+static u32 fmc_mux_table[] = {0, 1, 2};
+
+static const struct hisi_mux_clock hi3521a_mux_clks[] = {
+ { 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_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, },
+ /* { HI3521A_ETH_CLK, "clk_eth", NULL, */
+ /* 0, 0x78, 1, 0, }, */
+ /* { HI3521A_ETH_MACIF_CLK, "clk_eth_macif", NULL, */
+ /* 0, 0x78, 3, 0 }, */
+};
+
+static struct hisi_clock_data *hi3521a_clk_register(struct platform_device *pdev)
+{
+ struct hisi_clock_data *clk_data;
+ int ret;
+
+ clk_data = hisi_clk_alloc(pdev, HI3521A_NR_CLKS);
+ if (!clk_data)
+ return ERR_PTR(-ENOMEM);
+
+ ret = hisi_clk_register_fixed_rate(hi3521a_fixed_rate_clks,
+ ARRAY_SIZE(hi3521a_fixed_rate_clks),
+ clk_data);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = hisi_clk_register_mux(hi3521a_mux_clks,
+ ARRAY_SIZE(hi3521a_mux_clks),
+ clk_data);
+ if (ret)
+ goto unregister_fixed_rate;
+
+ ret = hisi_clk_register_gate(hi3521a_gate_clks,
+ ARRAY_SIZE(hi3521a_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_fixed_rate:
+ hisi_clk_unregister_fixed_rate(hi3521a_fixed_rate_clks,
+ ARRAY_SIZE(hi3521a_fixed_rate_clks),
+ clk_data);
+
+unregister_mux:
+ hisi_clk_unregister_mux(hi3521a_mux_clks,
+ ARRAY_SIZE(hi3521a_mux_clks),
+ clk_data);
+unregister_gate:
+ hisi_clk_unregister_gate(hi3521a_gate_clks,
+ ARRAY_SIZE(hi3521a_gate_clks),
+ clk_data);
+ return ERR_PTR(ret);
+}
+
+static void hi3521a_clk_unregister(struct platform_device *pdev)
+{
+ struct hi3521a_crg_data *crg = platform_get_drvdata(pdev);
+
+ of_clk_del_provider(pdev->dev.of_node);
+
+ hisi_clk_unregister_gate(hi3521a_gate_clks,
+ ARRAY_SIZE(hi3521a_mux_clks),
+ crg->clk_data);
+ hisi_clk_unregister_mux(hi3521a_mux_clks,
+ ARRAY_SIZE(hi3521a_mux_clks),
+ crg->clk_data);
+ hisi_clk_unregister_fixed_rate(hi3521a_fixed_rate_clks,
+ ARRAY_SIZE(hi3521a_fixed_rate_clks),
+ crg->clk_data);
+}
+
+static int hi3521a_clk_probe(struct platform_device *pdev)
+{
+ struct hi3521a_crg_data *crg;
+
+ crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
+ if (!crg)
+ return -ENOMEM;
+
+ crg->rstc = hisi_reset_init(pdev);
+ if (!crg->rstc)
+ return -ENOMEM;
+
+ crg->clk_data = hi3521a_clk_register(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 hi3521a_clk_remove(struct platform_device *pdev)
+{
+ struct hi3521a_crg_data *crg = platform_get_drvdata(pdev);
+
+ hisi_reset_exit(crg->rstc);
+ hi3521a_clk_unregister(pdev);
+ return 0;
+}
+
+static const struct of_device_id hi3521a_clk_match_table[] = {
+ { .compatible = "hisilicon,hi3521a-crg" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, hi3521a_clk_match_table);
+
+static struct platform_driver hi3521a_clk_driver = {
+ .probe = hi3521a_clk_probe,
+ .remove = hi3521a_clk_remove,
+ .driver = {
+ .name = "hi3521a-clk",
+ .of_match_table = hi3521a_clk_match_table,
+ },
+};
+
+static int __init hi3521a_clk_init(void)
+{
+ return platform_driver_register(&hi3521a_clk_driver);
+}
+core_initcall(hi3521a_clk_init);
+
+static void __exit hi3521a_clk_exit(void)
+{
+ platform_driver_unregister(&hi3521a_clk_driver);
+}
+module_exit(hi3521a_clk_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("HiSilicon Hi3521a Clock Driver");
diff --git a/include/dt-bindings/clock/hi3521a-clock.h b/include/dt-bindings/clock/hi3521a-clock.h
new file mode 100644
index 000000000000..666591236169
--- /dev/null
+++ b/include/dt-bindings/clock/hi3521a-clock.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2017 Marty E. Plummer <hanetzer@xxxxxxxxxxxxx>
+ *
+ * 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 3 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/>.
+ */
+
+#ifndef __DTS_HI3521A_CLOCK_H
+#define __DTS_HI3521A_CLOCK_H
+
+#define HI3521A_FMC_CLK 1
+#define HI3521A_SPI0_CLK 2
+#define HI3521A_UART0_CLK 3
+#define HI3521A_UART1_CLK 4
+#define HI3521A_UART2_CLK 5
+#define HI3521A_DMA_CLK 6
+#define HI3521A_IR_CLK 7
+#define HI3521A_ETH_PHY_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
+
+#endif /* __DTS_HI3521A_CLK_H */
--
2.14.1