Add a driver for the gated clock controller found on MIPS based BCM63XX
SoCs.
Signed-off-by: Jonas Gorski <jonas.gorski@xxxxxxxxx>
---
drivers/clk/bcm/Kconfig | 8 ++
drivers/clk/bcm/Makefile | 1 +
drivers/clk/bcm/clk-bcm63xx-gate.c | 246 +++++++++++++++++++++++++++++++++++++
3 files changed, 255 insertions(+)
create mode 100644 drivers/clk/bcm/clk-bcm63xx-gate.c
diff --git a/drivers/clk/bcm/Kconfig b/drivers/clk/bcm/Kconfig
index 4c4bd85f707c..144e724815c6 100644
--- a/drivers/clk/bcm/Kconfig
+++ b/drivers/clk/bcm/Kconfig
@@ -7,6 +7,14 @@ config CLK_BCM_63XX
Enable common clock framework support for Broadcom BCM63xx DSL SoCs
based on the ARM architecture
+config CLK_BCM_63XX_GATE
+ bool "Broadcom BCM63xx gated clock support"
+ depends on BMIPS_GENERIC || COMPILE_TEST
+ default BMIPS_GENERIC
+ help
+ Enable common clock framework support for Broadcom BCM63xx DSL SoCs
+ based on the MIPS architecture
+
config CLK_BCM_KONA
bool "Broadcom Kona CCU clock support"
depends on ARCH_BCM_MOBILE || COMPILE_TEST
diff --git a/drivers/clk/bcm/Makefile b/drivers/clk/bcm/Makefile
index 002661d39128..3d925493db7f 100644
--- a/drivers/clk/bcm/Makefile
+++ b/drivers/clk/bcm/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_CLK_BCM_63XX) += clk-bcm63xx.o
+obj-$(CONFIG_CLK_BCM_63XX_GATE) += clk-bcm63xx-gate.o
obj-$(CONFIG_CLK_BCM_KONA) += clk-kona.o
obj-$(CONFIG_CLK_BCM_KONA) += clk-kona-setup.o
obj-$(CONFIG_CLK_BCM_KONA) += clk-bcm281xx.o
diff --git a/drivers/clk/bcm/clk-bcm63xx-gate.c b/drivers/clk/bcm/clk-bcm63xx-gate.c
new file mode 100644
index 000000000000..4fd10645a192
--- /dev/null
+++ b/drivers/clk/bcm/clk-bcm63xx-gate.c
@@ -0,0 +1,246 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <linux/clk-provider.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+struct clk_bcm63xx_table_entry {
+ const char * const name;
+ u8 bit;
+ unsigned long flags;
+};
+
+struct clk_bcm63xx_hw {
+ void __iomem *regs;
+ spinlock_t lock;
+
+ struct clk_hw_onecell_data data;
+};
+
+const struct clk_bcm63xx_table_entry bcm3368_clocks[] = {
+ { .name = "mac", .bit = 3, },
+ { .name = "tc", .bit = 5, },
+ { .name = "us_top", .bit = 6, },
+ { .name = "ds_top", .bit = 7, },
+ { .name = "acm", .bit = 8, },
+ { .name = "spi", .bit = 9, },
+ { .name = "usbs", .bit = 10, },
+ { .name = "bmu", .bit = 11, },
+ { .name = "pcm", .bit = 12, },
+ { .name = "ntp", .bit = 13, },
+ { .name = "acp_b", .bit = 14, },
+ { .name = "acp_a", .bit = 15, },
+ { .name = "emusb", .bit = 17, },
+ { .name = "enet0", .bit = 18, },
+ { .name = "enet1", .bit = 19, },
+ { .name = "usbsu", .bit = 20, },
+ { .name = "ephy", .bit = 21, },
+ { },
+};
+
+const struct clk_bcm63xx_table_entry bcm6328_clocks[] = {
+ { .name = "phy_mips", .bit = 0, },
+ { .name = "adsl_qproc", .bit = 1, },
+ { .name = "adsl_afe", .bit = 2, },
+ { .name = "adsl", .bit = 3, },
+ { .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },
+ { .name = "sar", .bit = 5, },
+ { .name = "pcm", .bit = 6, },
+ { .name = "usbd", .bit = 7, },
+ { .name = "usbh", .bit = 8, },
+ { .name = "hsspi", .bit = 9, },
+ { .name = "pcie", .bit = 10, },
+ { .name = "robosw", .bit = 11, },
+ { },
+};
+
+const struct clk_bcm63xx_table_entry bcm6358_clocks[] = {
+ { .name = "enet", .bit = 4, },
+ { .name = "adslphy", .bit = 5, },
+ { .name = "pcm", .bit = 8, },
+ { .name = "spi", .bit = 9, },
+ { .name = "usbs", .bit = 10, },
+ { .name = "sar", .bit = 11, },
+ { .name = "emusb", .bit = 17, },
+ { .name = "enet0", .bit = 18, },
+ { .name = "enet1", .bit = 19, },
+ { .name = "usbsu", .bit = 20, },
+ { .name = "ephy", .bit = 21, },
+ { },
+};
+
+const struct clk_bcm63xx_table_entry bcm6362_clocks[] = {
+ { .name = "adsl_qproc", .bit = 1, },
+ { .name = "adsl_afe", .bit = 2, },
+ { .name = "adsl", .bit = 3, },
+ { .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },
+ { .name = "wlan_ocp", .bit = 5, },
+ { .name = "swpkt_usb", .bit = 7, },
+ { .name = "swpkt_sar", .bit = 8, },
+ { .name = "sar", .bit = 9, },
+ { .name = "robosw", .bit = 10, },
+ { .name = "pcm", .bit = 11, },
+ { .name = "usbd", .bit = 12, },
+ { .name = "usbh", .bit = 13, },
+ { .name = "ipsec", .bit = 14, },
+ { .name = "spi", .bit = 15, },
+ { .name = "hsspi", .bit = 16, },
+ { .name = "pcie", .bit = 17, },
+ { .name = "fap", .bit = 18, },
+ { .name = "phymips", .bit = 19, },
+ { .name = "nand", .bit = 20, },
+ { },
+};
+
+const struct clk_bcm63xx_table_entry bcm6368_clocks[] = {
+ { .name = "vdsl_qproc", .bit = 2, },
+ { .name = "vdsl_afe", .bit = 3, },
+ { .name = "vdsl_bonding", .bit = 4, },
+ { .name = "vdsl", .bit = 5, },
+ { .name = "phymips", .bit = 6, },
+ { .name = "swpkt_usb", .bit = 7, },
+ { .name = "swpkt_sar", .bit = 8, },
+ { .name = "spi", .bit = 9, },
+ { .name = "usbd", .bit = 10, },
+ { .name = "sar", .bit = 11, },
+ { .name = "robosw", .bit = 12, },
+ { .name = "utopia", .bit = 13, },
+ { .name = "pcm", .bit = 14, },
+ { .name = "usbh", .bit = 15, },
+ { .name = "disable_gless", .bit = 16, },
+ { .name = "nand", .bit = 17, },
+ { .name = "ipsec", .bit = 18, },
+ { },
+};
+
+const struct clk_bcm63xx_table_entry bcm63268_clocks[] = {
+ { .name = "disable_gless", .bit = 0, },
+ { .name = "vdsl_qproc", .bit = 1, },
+ { .name = "vdsl_afe", .bit = 2, },
+ { .name = "vdsl", .bit = 3, },
+ { .name = "mips", .bit = 4, .flags = CLK_IS_CRITICAL, },
+ { .name = "wlan_ocp", .bit = 5, },
+ { .name = "dect", .bit = 6, },
+ { .name = "fap0", .bit = 7, },
+ { .name = "fap1", .bit = 8, },
+ { .name = "sar", .bit = 9, },
+ { .name = "robosw", .bit = 10, },
+ { .name = "pcm", .bit = 11, },
+ { .name = "usbd", .bit = 12, },
+ { .name = "usbh", .bit = 13, },
+ { .name = "ipsec", .bit = 14, },
+ { .name = "spi", .bit = 15, },
+ { .name = "hsspi", .bit = 16, },
+ { .name = "pcie", .bit = 17, },
+ { .name = "phymips", .bit = 18, },
+ { .name = "gmac", .bit = 19, },
+ { .name = "nand", .bit = 20, },
+ { .name = "tbus", .bit = 27, },
+ { .name = "robosw250", .bit = 31, },
+ { },
+};
+
+static int clk_bcm63xx_probe(struct platform_device *pdev)
+{
+ const struct clk_bcm63xx_table_entry *entry, *table;
+ struct clk_bcm63xx_hw *hw;
+ struct resource *r;
+ u8 maxbit = 0;
+ int i, ret;
+
+ table = of_device_get_match_data(&pdev->dev);
+ if (!table)
+ return -EINVAL;
+
+ for (entry = table; entry->name; entry++)
+ maxbit = max_t(u8, maxbit, entry->bit);
+
+ hw = devm_kzalloc(&pdev->dev, struct_size(hw, data.hws, maxbit),
+ GFP_KERNEL);
+ if (!hw)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, hw);
+
+ spin_lock_init(&hw->lock);
+
+ hw->data.num = maxbit;
+ for (i = 0; i < maxbit; i++)
+ hw->data.hws[i] = ERR_PTR(-ENODEV);
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hw->regs = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(hw->regs))
+ return PTR_ERR(hw->regs);
+
+ for (entry = table; entry->name; entry++) {
+ struct clk_hw *clk;
+
+ clk = clk_hw_register_gate(&pdev->dev, entry->name, NULL,
+ entry->flags, hw->regs, entry->bit,
+ CLK_GATE_BIG_ENDIAN, &hw->lock);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto out_err;
+ }
+
+ hw->data.hws[entry->bit] = clk;
+ }
+
+ ret = of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,
+ &hw->data);
+ if (!ret)
+ return 0;
+out_err:
+ for (i = 0; i < hw->data.num; i++) {
+ if (!IS_ERR(hw->data.hws[i]))
+ clk_hw_unregister_gate(hw->data.hws[i]);
+ }
+
+ return ret;
+}
+
+static int clk_bcm63xx_remove(struct platform_device *pdev)
+{
+ struct clk_bcm63xx_hw *hw = platform_get_drvdata(pdev);
+ int i;
+
+ of_clk_del_provider(pdev->dev.of_node);
+
+ for (i = 0; i < hw->data.num; i++) {
+ if (!IS_ERR(hw->data.hws[i]))
+ clk_hw_unregister_gate(hw->data.hws[i]);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id clk_bcm63xx_dt_ids[] = {
+ { .compatible = "brcm,bcm3368-clocks", .data = &bcm3368_clocks, },
+ { .compatible = "brcm,bcm6328-clocks", .data = &bcm6328_clocks, },
+ { .compatible = "brcm,bcm6358-clocks", .data = &bcm6358_clocks, },
+ { .compatible = "brcm,bcm6362-clocks", .data = &bcm6362_clocks, },
+ { .compatible = "brcm,bcm6368-clocks", .data = &bcm6368_clocks, },
+ { .compatible = "brcm,bcm63268-clocks", .data = &bcm63268_clocks, },
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, clk_bcm63xx_dt_ids);
+
+static struct platform_driver clk_bcm63xx = {
+ .probe = clk_bcm63xx_probe,
+ .remove = clk_bcm63xx_remove,
+ .driver = {
+ .name = "bcm63xx-clock",
+ .of_match_table = of_match_ptr(clk_bcm63xx_dt_ids),
+ },
+};
+
+builtin_platform_driver(clk_bcm63xx);
+
+MODULE_AUTHOR("Jonas Gorski <jonas.gorski@xxxxxxxxx>");
+MODULE_DESCRIPTION("BCM63XX (MIPS) gated clock controller driver");
+MODULE_LICENSE("GPL");
--
2.13.2
