[PATCH v8 04/42] clk: davinci: Add platform information for TI DA850 PLL

David Lechner
2018-03-16T03:01:26Z

This adds platform-specific declarations for the PLL clocks on TI DA850/
OMAP-L138/AM18XX SoCs.

Signed-off-by: David Lechner <david@lechnology.com>
---

v8 changes:
- drop __init and __initconst attributes
- add a clkdev lookup for each SYSCLK

v7 changes:
- include clkdev lookup registration here instead of in mach-davinci
- split registration functions for each PLL
- Add platform_device_id lookup

v6 changes:
- Added da850_pll{0,1}_info with controller-specific information
- Added OBSCLK data
- Add empty lines between function calls

drivers/clk/davinci/Makefile | 1 +
drivers/clk/davinci/pll-da850.c | 212 ++++++++++++++++++++++++++++++++++++++++
drivers/clk/davinci/pll.c | 4 +
drivers/clk/davinci/pll.h | 5 +
4 files changed, 222 insertions(+)
create mode 100644 drivers/clk/davinci/pll-da850.c

diff --git a/drivers/clk/davinci/Makefile b/drivers/clk/davinci/Makefile
index 9061e19..13049d4 100644
--- a/drivers/clk/davinci/Makefile
+++ b/drivers/clk/davinci/Makefile
@@ -3,4 +3,5 @@
ifeq ($(CONFIG_COMMON_CLK), y)
obj-y += pll.o
obj-$(CONFIG_ARCH_DAVINCI_DA830) += pll-da830.o
+obj-$(CONFIG_ARCH_DAVINCI_DA850) += pll-da850.o
endif
diff --git a/drivers/clk/davinci/pll-da850.c b/drivers/clk/davinci/pll-da850.c
new file mode 100644
index 0000000..2a038b7
--- /dev/null
+++ b/drivers/clk/davinci/pll-da850.c
@@ -0,0 +1,212 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PLL clock descriptions for TI DA850/OMAP-L138/AM18XX
+ *
+ * Copyright (C) 2018 David Lechner <david@lechnology.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mfd/da8xx-cfgchip.h>
+#include <linux/of.h>
+#include <linux/types.h>
+
+#include "pll.h"
+
+#define OCSEL_OCSRC_OSCIN 0x14
+#define OCSEL_OCSRC_PLL0_SYSCLK(n) (0x16 + (n))
+#define OCSEL_OCSRC_PLL1_OBSCLK 0x1e
+#define OCSEL_OCSRC_PLL1_SYSCLK(n) (0x16 + (n))
+
+static const struct davinci_pll_clk_info da850_pll0_info = {
+ .name = "pll0",
+ .unlock_reg = CFGCHIP(0),
+ .unlock_mask = CFGCHIP0_PLL_MASTER_LOCK,
+ .pllm_mask = GENMASK(4, 0),
+ .pllm_min = 4,
+ .pllm_max = 32,
+ .pllout_min_rate = 300000000,
+ .pllout_max_rate = 600000000,
+ .flags = PLL_HAS_CLKMODE | PLL_HAS_PREDIV | PLL_HAS_POSTDIV |
+ PLL_HAS_EXTCLKSRC,
+};
+
+/*
+ * NB: Technically, the clocks flagged as SYSCLK_FIXED_DIV are "fixed ratio",
+ * meaning that we could change the divider as long as we keep the correct
+ * ratio between all of the clocks, but we don't support that because there is
+ * currently not a need for it.
+ */
+
+SYSCLK(1, pll0_sysclk1, pll0_pllen, 5, SYSCLK_FIXED_DIV);
+SYSCLK(2, pll0_sysclk2, pll0_pllen, 5, SYSCLK_FIXED_DIV);
+SYSCLK(3, pll0_sysclk3, pll0_pllen, 5, 0);
+SYSCLK(4, pll0_sysclk4, pll0_pllen, 5, SYSCLK_FIXED_DIV);
+SYSCLK(5, pll0_sysclk5, pll0_pllen, 5, 0);
+SYSCLK(6, pll0_sysclk6, pll0_pllen, 5, SYSCLK_ARM_RATE | SYSCLK_FIXED_DIV);
+SYSCLK(7, pll0_sysclk7, pll0_pllen, 5, 0);
+
+static const char * const da850_pll0_obsclk_parent_names[] = {
+ "oscin",
+ "pll0_sysclk1",
+ "pll0_sysclk2",
+ "pll0_sysclk3",
+ "pll0_sysclk4",
+ "pll0_sysclk5",
+ "pll0_sysclk6",
+ "pll0_sysclk7",
+ "pll1_obsclk",
+};
+
+static u32 da850_pll0_obsclk_table[] = {
+ OCSEL_OCSRC_OSCIN,
+ OCSEL_OCSRC_PLL0_SYSCLK(1),
+ OCSEL_OCSRC_PLL0_SYSCLK(2),
+ OCSEL_OCSRC_PLL0_SYSCLK(3),
+ OCSEL_OCSRC_PLL0_SYSCLK(4),
+ OCSEL_OCSRC_PLL0_SYSCLK(5),
+ OCSEL_OCSRC_PLL0_SYSCLK(6),
+ OCSEL_OCSRC_PLL0_SYSCLK(7),
+ OCSEL_OCSRC_PLL1_OBSCLK,
+};
+
+static const struct davinci_pll_obsclk_info da850_pll0_obsclk_info = {
+ .name = "pll0_obsclk",
+ .parent_names = da850_pll0_obsclk_parent_names,
+ .num_parents = ARRAY_SIZE(da850_pll0_obsclk_parent_names),
+ .table = da850_pll0_obsclk_table,
+ .ocsrc_mask = GENMASK(4, 0),
+};
+
+int da850_pll0_init(struct device *dev, void __iomem *base)
+{
+ struct clk *clk;
+
+ davinci_pll_clk_register(dev, &da850_pll0_info, "ref_clk", base);
+
+ clk = davinci_pll_sysclk_register(dev, &pll0_sysclk1, base);
+ clk_register_clkdev(clk, "pll0_sysclk1", "da850-psc0");
+
+ clk = davinci_pll_sysclk_register(dev, &pll0_sysclk2, base);
+ clk_register_clkdev(clk, "pll0_sysclk2", "da850-psc0");
+ clk_register_clkdev(clk, "pll0_sysclk2", "da850-psc1");
+ clk_register_clkdev(clk, "pll0_sysclk2", "da850-async3-clksrc");
+
+ clk = davinci_pll_sysclk_register(dev, &pll0_sysclk3, base);
+ clk_register_clkdev(clk, "pll0_sysclk3", "da850-async1-clksrc");
+
+ clk = davinci_pll_sysclk_register(dev, &pll0_sysclk4, base);
+ clk_register_clkdev(clk, "pll0_sysclk4", "da850-psc0");
+ clk_register_clkdev(clk, "pll0_sysclk4", "da850-psc1");
+
+ davinci_pll_sysclk_register(dev, &pll0_sysclk5, base);
+
+ clk = davinci_pll_sysclk_register(dev, &pll0_sysclk6, base);
+ clk_register_clkdev(clk, "pll0_sysclk6", "da850-psc0");
+
+ davinci_pll_sysclk_register(dev, &pll0_sysclk7, base);
+
+ davinci_pll_auxclk_register(dev, "pll0_auxclk", base);
+
+ clk = clk_register_fixed_factor(dev, "async2", "pll0_auxclk",
+ CLK_IS_CRITICAL, 1, 1);
+
+ clk_register_clkdev(clk, NULL, "i2c_davinci.1");
+ clk_register_clkdev(clk, "timer0", NULL);
+ clk_register_clkdev(clk, NULL, "davinci-wdt");
+
+ davinci_pll_obsclk_register(dev, &da850_pll0_obsclk_info, base);
+
+ return 0;
+}
+
+static const struct davinci_pll_sysclk_info *da850_pll0_sysclk_info[] = {
+ &pll0_sysclk1,
+ &pll0_sysclk2,
+ &pll0_sysclk3,
+ &pll0_sysclk4,
+ &pll0_sysclk5,
+ &pll0_sysclk6,
+ &pll0_sysclk7,
+ NULL
+};
+
+int of_da850_pll0_init(struct device *dev, void __iomem *base)
+{
+ return of_davinci_pll_init(dev, &da850_pll0_info,
+ &da850_pll0_obsclk_info,
+ da850_pll0_sysclk_info, 7, base);
+}
+
+static const struct davinci_pll_clk_info da850_pll1_info = {
+ .name = "pll1",
+ .unlock_reg = CFGCHIP(3),
+ .unlock_mask = CFGCHIP3_PLL1_MASTER_LOCK,
+ .pllm_mask = GENMASK(4, 0),
+ .pllm_min = 4,
+ .pllm_max = 32,
+ .pllout_min_rate = 300000000,
+ .pllout_max_rate = 600000000,
+ .flags = PLL_HAS_POSTDIV,
+};
+
+SYSCLK(1, pll1_sysclk1, pll1_pllen, 5, SYSCLK_ALWAYS_ENABLED);
+SYSCLK(2, pll1_sysclk2, pll1_pllen, 5, 0);
+SYSCLK(3, pll1_sysclk3, pll1_pllen, 5, 0);
+
+static const char * const da850_pll1_obsclk_parent_names[] = {
+ "oscin",
+ "pll1_sysclk1",
+ "pll1_sysclk2",
+ "pll1_sysclk3",
+};
+
+static u32 da850_pll1_obsclk_table[] = {
+ OCSEL_OCSRC_OSCIN,
+ OCSEL_OCSRC_PLL1_SYSCLK(1),
+ OCSEL_OCSRC_PLL1_SYSCLK(2),
+ OCSEL_OCSRC_PLL1_SYSCLK(3),
+};
+
+static const struct davinci_pll_obsclk_info da850_pll1_obsclk_info = {
+ .name = "pll1_obsclk",
+ .parent_names = da850_pll1_obsclk_parent_names,
+ .num_parents = ARRAY_SIZE(da850_pll1_obsclk_parent_names),
+ .table = da850_pll1_obsclk_table,
+ .ocsrc_mask = GENMASK(4, 0),
+};
+
+int da850_pll1_init(struct device *dev, void __iomem *base)
+{
+ struct clk *clk;
+
+ davinci_pll_clk_register(dev, &da850_pll1_info, "oscin", base);
+
+ davinci_pll_sysclk_register(dev, &pll1_sysclk1, base);
+
+ clk = davinci_pll_sysclk_register(dev, &pll1_sysclk2, base);
+ clk_register_clkdev(clk, "pll1_sysclk2", "da850-async3-clksrc");
+
+ davinci_pll_sysclk_register(dev, &pll1_sysclk3, base);
+
+ davinci_pll_obsclk_register(dev, &da850_pll1_obsclk_info, base);
+
+ return 0;
+}
+
+static const struct davinci_pll_sysclk_info *da850_pll1_sysclk_info[] = {
+ &pll1_sysclk1,
+ &pll1_sysclk2,
+ &pll1_sysclk3,
+ NULL
+};
+
+int of_da850_pll1_init(struct device *dev, void __iomem *base)
+{
+ return of_davinci_pll_init(dev, &da850_pll1_info,
+ &da850_pll1_obsclk_info,
+ da850_pll1_sysclk_info, 3, base);
+}
diff --git a/drivers/clk/davinci/pll.c b/drivers/clk/davinci/pll.c
index eaf8049..535f725 100644
--- a/drivers/clk/davinci/pll.c
+++ b/drivers/clk/davinci/pll.c
@@ -771,11 +771,15 @@ int of_davinci_pll_init(struct device *dev,
}

static const struct of_device_id davinci_pll_of_match[] = {
+ { .compatible = "ti,da850-pll0", .data = of_da850_pll0_init },
+ { .compatible = "ti,da850-pll1", .data = of_da850_pll1_init },
{ }
};

static const struct platform_device_id davinci_pll_id_table[] = {
{ .name = "da830-pll", .driver_data = (kernel_ulong_t)da830_pll_init },
+ { .name = "da850-pll0", .driver_data = (kernel_ulong_t)da850_pll0_init },
+ { .name = "da850-pll1", .driver_data = (kernel_ulong_t)da850_pll1_init },
{ }
};

diff --git a/drivers/clk/davinci/pll.h b/drivers/clk/davinci/pll.h
index 0de2c61..53b8d51 100644
--- a/drivers/clk/davinci/pll.h
+++ b/drivers/clk/davinci/pll.h
@@ -121,4 +121,9 @@ int of_davinci_pll_init(struct device *dev,

int da830_pll_init(struct device *dev, void __iomem *base);

+int da850_pll0_init(struct device *dev, void __iomem *base);
+int da850_pll1_init(struct device *dev, void __iomem *base);
+int of_da850_pll0_init(struct device *dev, void __iomem *base);
+int of_da850_pll1_init(struct device *dev, void __iomem *base);
+
#endif /* __CLK_DAVINCI_PLL_H___ */
--
2.7.4