clk: imx: add clk driver for i.MX8QXP

Add clk driver for i.MX8QXP. This basic version supports clk
enable/disable/get_rate/set_rate operations for I2C, ENET,
SDHC0 and UART clocks.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 7853a7a9d345ac76c7bb7b02bf41ed6e1110f82c..eadf7f8250bb8b76001213ae89f828543d4320ef 100644 (file)
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -100,6 +100,7 @@ config CLK_STM32MP1
 
 source "drivers/clk/at91/Kconfig"
 source "drivers/clk/exynos/Kconfig"
+source "drivers/clk/imx/Kconfig"
 source "drivers/clk/mvebu/Kconfig"
 source "drivers/clk/owl/Kconfig"
 source "drivers/clk/renesas/Kconfig"

diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 8bc9f520c169db41477de9362a609dd6feffa898..f87c9aec8532462478e7a74487dea6984e7fc464 100644 (file)
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -7,6 +7,7 @@
 
 obj-$(CONFIG_$(SPL_TPL_)CLK) += clk-uclass.o clk_fixed_rate.o
 
+obj-y += imx/
 obj-y += tegra/
 obj-$(CONFIG_ARCH_ASPEED) += aspeed/
 obj-$(CONFIG_ARCH_MESON) += clk_meson.o

diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
new file mode 100644 (file)
index 0000000..a6fb58d
--- /dev/null
+++ b/drivers/clk/imx/Kconfig
@@ -0,0 +1,6 @@
+config CLK_IMX8
+       bool "Clock support for i.MX8"
+       depends on ARCH_IMX8
+       select CLK
+       help
+         This enables support clock driver for i.MX8 platforms.

diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile
new file mode 100644 (file)
index 0000000..5505ae5
--- /dev/null
+++ b/drivers/clk/imx/Makefile
@@ -0,0 +1,5 @@
+# Copyright 2018 NXP
+#
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_CLK_IMX8) += clk-imx8.o

diff --git a/drivers/clk/imx/clk-imx8.c b/drivers/clk/imx/clk-imx8.c
new file mode 100644 (file)
index 0000000..fcb8090
--- /dev/null
+++ b/drivers/clk/imx/clk-imx8.c
@@ -0,0 +1,393 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2018 NXP
+ * Peng Fan <peng.fan@nxp.com>
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <asm/arch/sci/sci.h>
+#include <asm/arch/clock.h>
+#include <dt-bindings/clock/imx8qxp-clock.h>
+#include <dt-bindings/soc/imx_rsrc.h>
+#include <misc.h>
+
+struct imx8_clks {
+       ulong id;
+       const char *name;
+};
+
+static struct imx8_clks imx8_clk_names[] = {
+       { IMX8QXP_A35_DIV, "A35_DIV" },
+       { IMX8QXP_I2C0_CLK, "I2C0" },
+       { IMX8QXP_I2C1_CLK, "I2C1" },
+       { IMX8QXP_I2C2_CLK, "I2C2" },
+       { IMX8QXP_I2C3_CLK, "I2C3" },
+       { IMX8QXP_UART0_CLK, "UART0" },
+       { IMX8QXP_UART1_CLK, "UART1" },
+       { IMX8QXP_UART2_CLK, "UART2" },
+       { IMX8QXP_UART3_CLK, "UART3" },
+       { IMX8QXP_SDHC0_CLK, "SDHC0" },
+       { IMX8QXP_SDHC1_CLK, "SDHC1" },
+       { IMX8QXP_ENET0_AHB_CLK, "ENET0_AHB" },
+       { IMX8QXP_ENET0_IPG_CLK, "ENET0_IPG" },
+       { IMX8QXP_ENET0_REF_DIV, "ENET0_REF" },
+       { IMX8QXP_ENET0_PTP_CLK, "ENET0_PTP" },
+       { IMX8QXP_ENET1_AHB_CLK, "ENET1_AHB" },
+       { IMX8QXP_ENET1_IPG_CLK, "ENET1_IPG" },
+       { IMX8QXP_ENET1_REF_DIV, "ENET1_REF" },
+       { IMX8QXP_ENET1_PTP_CLK, "ENET1_PTP" },
+};
+
+static ulong imx8_clk_get_rate(struct clk *clk)
+{
+       sc_pm_clk_t pm_clk;
+       ulong rate;
+       u16 resource;
+       int ret;
+
+       debug("%s(#%lu)\n", __func__, clk->id);
+
+       switch (clk->id) {
+       case IMX8QXP_A35_DIV:
+               resource = SC_R_A35;
+               pm_clk = SC_PM_CLK_CPU;
+               break;
+       case IMX8QXP_I2C0_CLK:
+               resource = SC_R_I2C_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C1_CLK:
+               resource = SC_R_I2C_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C2_CLK:
+               resource = SC_R_I2C_2;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C3_CLK:
+               resource = SC_R_I2C_3;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_SDHC0_IPG_CLK:
+       case IMX8QXP_SDHC0_CLK:
+       case IMX8QXP_SDHC0_DIV:
+               resource = SC_R_SDHC_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_SDHC1_IPG_CLK:
+       case IMX8QXP_SDHC1_CLK:
+       case IMX8QXP_SDHC1_DIV:
+               resource = SC_R_SDHC_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART0_IPG_CLK:
+       case IMX8QXP_UART0_CLK:
+               resource = SC_R_UART_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART1_CLK:
+               resource = SC_R_UART_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART2_CLK:
+               resource = SC_R_UART_2;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART3_CLK:
+               resource = SC_R_UART_3;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_ENET0_IPG_CLK:
+       case IMX8QXP_ENET0_AHB_CLK:
+       case IMX8QXP_ENET0_REF_DIV:
+       case IMX8QXP_ENET0_PTP_CLK:
+               resource = SC_R_ENET_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_ENET1_IPG_CLK:
+       case IMX8QXP_ENET1_AHB_CLK:
+       case IMX8QXP_ENET1_REF_DIV:
+       case IMX8QXP_ENET1_PTP_CLK:
+               resource = SC_R_ENET_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       default:
+               if (clk->id < IMX8QXP_UART0_IPG_CLK ||
+                   clk->id >= IMX8QXP_CLK_END) {
+                       printf("%s(Invalid clk ID #%lu)\n",
+                              __func__, clk->id);
+                       return -EINVAL;
+               }
+               return -ENOTSUPP;
+       };
+
+       ret = sc_pm_get_clock_rate(-1, resource, pm_clk,
+                                  (sc_pm_clock_rate_t *)&rate);
+       if (ret) {
+               printf("%s err %d\n", __func__, ret);
+               return ret;
+       }
+
+       return rate;
+}
+
+static ulong imx8_clk_set_rate(struct clk *clk, unsigned long rate)
+{
+       sc_pm_clk_t pm_clk;
+       u32 new_rate = rate;
+       u16 resource;
+       int ret;
+
+       debug("%s(#%lu), rate: %lu\n", __func__, clk->id, rate);
+
+       switch (clk->id) {
+       case IMX8QXP_I2C0_CLK:
+               resource = SC_R_I2C_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C1_CLK:
+               resource = SC_R_I2C_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C2_CLK:
+               resource = SC_R_I2C_2;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C3_CLK:
+               resource = SC_R_I2C_3;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART0_CLK:
+               resource = SC_R_UART_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART1_CLK:
+               resource = SC_R_UART_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART2_CLK:
+               resource = SC_R_UART_2;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART3_CLK:
+               resource = SC_R_UART_3;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_SDHC0_IPG_CLK:
+       case IMX8QXP_SDHC0_CLK:
+       case IMX8QXP_SDHC0_DIV:
+               resource = SC_R_SDHC_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_SDHC1_SEL:
+       case IMX8QXP_SDHC0_SEL:
+               return 0;
+       case IMX8QXP_SDHC1_IPG_CLK:
+       case IMX8QXP_SDHC1_CLK:
+       case IMX8QXP_SDHC1_DIV:
+               resource = SC_R_SDHC_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_ENET0_IPG_CLK:
+       case IMX8QXP_ENET0_AHB_CLK:
+       case IMX8QXP_ENET0_REF_DIV:
+       case IMX8QXP_ENET0_PTP_CLK:
+               resource = SC_R_ENET_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_ENET1_IPG_CLK:
+       case IMX8QXP_ENET1_AHB_CLK:
+       case IMX8QXP_ENET1_REF_DIV:
+       case IMX8QXP_ENET1_PTP_CLK:
+               resource = SC_R_ENET_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       default:
+               if (clk->id < IMX8QXP_UART0_IPG_CLK ||
+                   clk->id >= IMX8QXP_CLK_END) {
+                       printf("%s(Invalid clk ID #%lu)\n",
+                              __func__, clk->id);
+                       return -EINVAL;
+               }
+               return -ENOTSUPP;
+       };
+
+       ret = sc_pm_set_clock_rate(-1, resource, pm_clk, &new_rate);
+       if (ret) {
+               printf("%s err %d\n", __func__, ret);
+               return ret;
+       }
+
+       return new_rate;
+}
+
+static int __imx8_clk_enable(struct clk *clk, bool enable)
+{
+       sc_pm_clk_t pm_clk;
+       u16 resource;
+       int ret;
+
+       debug("%s(#%lu)\n", __func__, clk->id);
+
+       switch (clk->id) {
+       case IMX8QXP_I2C0_CLK:
+               resource = SC_R_I2C_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C1_CLK:
+               resource = SC_R_I2C_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C2_CLK:
+               resource = SC_R_I2C_2;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_I2C3_CLK:
+               resource = SC_R_I2C_3;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART0_CLK:
+               resource = SC_R_UART_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART1_CLK:
+               resource = SC_R_UART_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART2_CLK:
+               resource = SC_R_UART_2;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_UART3_CLK:
+               resource = SC_R_UART_3;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_SDHC0_IPG_CLK:
+       case IMX8QXP_SDHC0_CLK:
+       case IMX8QXP_SDHC0_DIV:
+               resource = SC_R_SDHC_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_SDHC1_IPG_CLK:
+       case IMX8QXP_SDHC1_CLK:
+       case IMX8QXP_SDHC1_DIV:
+               resource = SC_R_SDHC_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_ENET0_IPG_CLK:
+       case IMX8QXP_ENET0_AHB_CLK:
+       case IMX8QXP_ENET0_REF_DIV:
+       case IMX8QXP_ENET0_PTP_CLK:
+               resource = SC_R_ENET_0;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       case IMX8QXP_ENET1_IPG_CLK:
+       case IMX8QXP_ENET1_AHB_CLK:
+       case IMX8QXP_ENET1_REF_DIV:
+       case IMX8QXP_ENET1_PTP_CLK:
+               resource = SC_R_ENET_1;
+               pm_clk = SC_PM_CLK_PER;
+               break;
+       default:
+               if (clk->id < IMX8QXP_UART0_IPG_CLK ||
+                   clk->id >= IMX8QXP_CLK_END) {
+                       printf("%s(Invalid clk ID #%lu)\n",
+                              __func__, clk->id);
+                       return -EINVAL;
+               }
+               return -ENOTSUPP;
+       }
+
+       ret = sc_pm_clock_enable(-1, resource, pm_clk, enable, 0);
+       if (ret) {
+               printf("%s err %d\n", __func__, ret);
+               return ret;
+       }
+
+       return 0;
+}
+
+static int imx8_clk_disable(struct clk *clk)
+{
+       return __imx8_clk_enable(clk, 0);
+}
+
+static int imx8_clk_enable(struct clk *clk)
+{
+       return __imx8_clk_enable(clk, 1);
+}
+
+#if CONFIG_IS_ENABLED(CMD_CLK)
+int soc_clk_dump(void)
+{
+       struct udevice *dev;
+       struct clk clk;
+       unsigned long rate;
+       int i, ret;
+
+       ret = uclass_get_device_by_driver(UCLASS_CLK,
+                                         DM_GET_DRIVER(imx8_clk), &dev);
+       if (ret)
+               return ret;
+
+       printf("Clk\t\tHz\n");
+
+       for (i = 0; i < ARRAY_SIZE(imx8_clk_names); i++) {
+               clk.id = imx8_clk_names[i].id;
+               ret = clk_request(dev, &clk);
+               if (ret < 0) {
+                       debug("%s clk_request() failed: %d\n", __func__, ret);
+                       continue;
+               }
+
+               ret = clk_get_rate(&clk);
+               rate = ret;
+
+               clk_free(&clk);
+
+               if (ret == -ENOTSUPP) {
+                       printf("clk ID %lu not supported yet\n",
+                              imx8_clk_names[i].id);
+                       continue;
+               }
+               if (ret < 0) {
+                       printf("%s %lu: get_rate err: %d\n",
+                              __func__, imx8_clk_names[i].id, ret);
+                       continue;
+               }
+
+               printf("%s(%3lu):\t%lu\n",
+                      imx8_clk_names[i].name, imx8_clk_names[i].id, rate);
+       }
+
+       return 0;
+}
+#endif
+
+static struct clk_ops imx8_clk_ops = {
+       .set_rate = imx8_clk_set_rate,
+       .get_rate = imx8_clk_get_rate,
+       .enable = imx8_clk_enable,
+       .disable = imx8_clk_disable,
+};
+
+static int imx8_clk_probe(struct udevice *dev)
+{
+       return 0;
+}
+
+static const struct udevice_id imx8_clk_ids[] = {
+       { .compatible = "fsl,imx8qxp-clk" },
+       { },
+};
+
+U_BOOT_DRIVER(imx8_clk) = {
+       .name = "clk_imx8",
+       .id = UCLASS_CLK,
+       .of_match = imx8_clk_ids,
+       .ops = &imx8_clk_ops,
+       .probe = imx8_clk_probe,
+       .flags = DM_FLAG_PRE_RELOC,
+};