[PATCH 4/7] clk: pistachio: Register core clocks
From: Andrew Bresticker
Date: Tue Feb 24 2015 - 22:56:52 EST
Register the clocks generated by the core clock controller.
This includes the 7 PLLs and clocks for the CPU, RPU co-processor,
audio, WiFi, bluetooth, and several other peripherals.
The MIPS and PERIPH_SYS clocks must remain enabled at all times.
Signed-off-by: Damien Horsley <Damien.Horsley@xxxxxxxxxx>
Signed-off-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx>
---
drivers/clk/pistachio/Makefile | 1 +
drivers/clk/pistachio/clk-pistachio.c | 199 ++++++++++++++++++++++++++++++++++
2 files changed, 200 insertions(+)
create mode 100644 drivers/clk/pistachio/clk-pistachio.c
diff --git a/drivers/clk/pistachio/Makefile b/drivers/clk/pistachio/Makefile
index a93490d..f1e151f 100644
--- a/drivers/clk/pistachio/Makefile
+++ b/drivers/clk/pistachio/Makefile
@@ -1,2 +1,3 @@
obj-y += clk.o
obj-y += clk-pll.o
+obj-y += clk-pistachio.o
diff --git a/drivers/clk/pistachio/clk-pistachio.c b/drivers/clk/pistachio/clk-pistachio.c
new file mode 100644
index 0000000..12a45e2
--- /dev/null
+++ b/drivers/clk/pistachio/clk-pistachio.c
@@ -0,0 +1,199 @@
+/*
+ * Pistachio SoC clock controllers
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+
+#include <dt-bindings/clock/pistachio-clk.h>
+
+#include "clk.h"
+
+static struct pistachio_gate pistachio_gates[] __initdata = {
+ GATE(CLK_MIPS, "mips", "mips_div", 0x104, 0),
+ GATE(CLK_AUDIO_IN, "audio_in", "audio_clk_in_gate", 0x104, 1),
+ GATE(CLK_AUDIO, "audio", "audio_div", 0x104, 2),
+ GATE(CLK_I2S, "i2s", "i2s_div", 0x104, 3),
+ GATE(CLK_SPDIF, "spdif", "spdif_div", 0x104, 4),
+ GATE(CLK_AUDIO_DAC, "audio_dac", "audio_dac_div", 0x104, 5),
+ GATE(CLK_RPU_V, "rpu_v", "rpu_v_div", 0x104, 6),
+ GATE(CLK_RPU_L, "rpu_l", "rpu_l_div", 0x104, 7),
+ GATE(CLK_RPU_SLEEP, "rpu_sleep", "rpu_sleep_div", 0x104, 8),
+ GATE(CLK_WIFI_PLL_GATE, "wifi_pll_gate", "wifi_pll_mux", 0x104, 9),
+ GATE(CLK_RPU_CORE, "rpu_core", "rpu_core_div", 0x104, 10),
+ GATE(CLK_WIFI_ADC, "wifi_adc", "wifi_div8_mux", 0x104, 11),
+ GATE(CLK_WIFI_DAC, "wifi_dac", "wifi_div4_mux", 0x104, 12),
+ GATE(CLK_USB_PHY, "usb_phy", "usb_phy_div", 0x104, 13),
+ GATE(CLK_ENET_IN, "enet_in", "enet_clk_in_gate", 0x104, 14),
+ GATE(CLK_ENET, "enet", "enet_div", 0x104, 15),
+ GATE(CLK_UART0, "uart0", "uart0_div", 0x104, 16),
+ GATE(CLK_UART1, "uart1", "uart1_div", 0x104, 17),
+ GATE(CLK_PERIPH_SYS, "periph_sys", "sys_internal_div", 0x104, 18),
+ GATE(CLK_SPI0, "spi0", "spi0_div", 0x104, 19),
+ GATE(CLK_SPI1, "spi1", "spi1_div", 0x104, 20),
+ GATE(CLK_EVENT_TIMER, "event_timer", "event_timer_div", 0x104, 21),
+ GATE(CLK_AUX_ADC_INTERNAL, "aux_adc_internal", "sys_internal_div",
+ 0x104, 22),
+ GATE(CLK_AUX_ADC, "aux_adc", "aux_adc_div", 0x104, 23),
+ GATE(CLK_SD_HOST, "sd_host", "sd_host_div", 0x104, 24),
+ GATE(CLK_BT, "bt", "bt_div", 0x104, 25),
+ GATE(CLK_BT_DIV4, "bt_div4", "bt_div4_div", 0x104, 26),
+ GATE(CLK_BT_DIV8, "bt_div8", "bt_div8_div", 0x104, 27),
+ GATE(CLK_BT_1MHZ, "bt_1mhz", "bt_1mhz_div", 0x104, 28),
+};
+
+static struct pistachio_fixed_factor pistachio_ffs[] __initdata = {
+ FIXED_FACTOR(CLK_WIFI_DIV4, "wifi_div4", "wifi_pll", 4),
+ FIXED_FACTOR(CLK_WIFI_DIV8, "wifi_div8", "wifi_pll", 8),
+};
+
+static struct pistachio_div pistachio_divs[] __initdata = {
+ DIV(CLK_MIPS_INTERNAL_DIV, "mips_internal_div", "mips_pll_mux",
+ 0x204, 2),
+ DIV(CLK_MIPS_DIV, "mips_div", "mips_internal_div", 0x208, 8),
+ DIV_F(CLK_AUDIO_DIV, "audio_div", "audio_mux",
+ 0x20c, 8, CLK_DIVIDER_ROUND_CLOSEST),
+ DIV_F(CLK_I2S_DIV, "i2s_div", "audio_pll_mux",
+ 0x210, 8, CLK_DIVIDER_ROUND_CLOSEST),
+ DIV_F(CLK_SPDIF_DIV, "spdif_div", "audio_pll_mux",
+ 0x214, 8, CLK_DIVIDER_ROUND_CLOSEST),
+ DIV_F(CLK_AUDIO_DAC_DIV, "audio_dac_div", "audio_pll_mux",
+ 0x218, 8, CLK_DIVIDER_ROUND_CLOSEST),
+ DIV(CLK_RPU_V_DIV, "rpu_v_div", "rpu_v_pll_mux", 0x21c, 2),
+ DIV(CLK_RPU_L_DIV, "rpu_l_div", "rpu_l_mux", 0x220, 2),
+ DIV(CLK_RPU_SLEEP_DIV, "rpu_sleep_div", "xtal", 0x224, 10),
+ DIV(CLK_RPU_CORE_DIV, "rpu_core_div", "rpu_core_mux", 0x228, 3),
+ DIV(CLK_USB_PHY_DIV, "usb_phy_div", "sys_internal_div", 0x22c, 6),
+ DIV(CLK_ENET_DIV, "enet_div", "enet_mux", 0x230, 6),
+ DIV_F(CLK_UART0_INTERNAL_DIV, "uart0_internal_div", "sys_pll_mux",
+ 0x234, 3, CLK_DIVIDER_ROUND_CLOSEST),
+ DIV_F(CLK_UART0_DIV, "uart0_div", "uart0_internal_div", 0x238, 10,
+ CLK_DIVIDER_ROUND_CLOSEST),
+ DIV_F(CLK_UART1_INTERNAL_DIV, "uart1_internal_div", "sys_pll_mux",
+ 0x23c, 3, CLK_DIVIDER_ROUND_CLOSEST),
+ DIV_F(CLK_UART1_DIV, "uart1_div", "uart1_internal_div", 0x240, 10,
+ CLK_DIVIDER_ROUND_CLOSEST),
+ DIV(CLK_SYS_INTERNAL_DIV, "sys_internal_div", "sys_pll_mux", 0x244, 3),
+ DIV(CLK_SPI0_INTERNAL_DIV, "spi0_internal_div", "sys_pll_mux",
+ 0x248, 3),
+ DIV(CLK_SPI0_DIV, "spi0_div", "spi0_internal_div", 0x24c, 7),
+ DIV(CLK_SPI1_INTERNAL_DIV, "spi1_internal_div", "sys_pll_mux",
+ 0x250, 3),
+ DIV(CLK_SPI1_DIV, "spi1_div", "spi1_internal_div", 0x254, 7),
+ DIV(CLK_EVENT_TIMER_INTERNAL_DIV, "event_timer_internal_div",
+ "event_timer_mux", 0x258, 3),
+ DIV(CLK_EVENT_TIMER_DIV, "event_timer_div", "event_timer_internal_div",
+ 0x25c, 12),
+ DIV(CLK_AUX_ADC_INTERNAL_DIV, "aux_adc_internal_div",
+ "aux_adc_internal", 0x260, 3),
+ DIV(CLK_AUX_ADC_DIV, "aux_adc_div", "aux_adc_internal_div", 0x264, 10),
+ DIV(CLK_SD_HOST_DIV, "sd_host_div", "sd_host_mux", 0x268, 6),
+ DIV(CLK_BT_DIV, "bt_div", "bt_pll_mux", 0x26c, 6),
+ DIV(CLK_BT_DIV4_DIV, "bt_div4_div", "bt_pll_mux", 0x270, 6),
+ DIV(CLK_BT_DIV8_DIV, "bt_div8_div", "bt_pll_mux", 0x274, 6),
+ DIV(CLK_BT_1MHZ_INTERNAL_DIV, "bt_1mhz_internal_div", "bt_pll_mux",
+ 0x278, 3),
+ DIV(CLK_BT_1MHZ_DIV, "bt_1mhz_div", "bt_1mhz_internal_div", 0x27c, 10),
+};
+
+PNAME(mux_xtal_audio_refclk) = { "xtal", "audio_clk_in_gate" };
+PNAME(mux_xtal_mips) = { "xtal", "mips_pll" };
+PNAME(mux_xtal_audio) = { "xtal", "audio_pll", "audio_in" };
+PNAME(mux_audio_debug) = { "audio_pll_mux", "debug_mux" };
+PNAME(mux_xtal_rpu_v) = { "xtal", "rpu_v_pll" };
+PNAME(mux_xtal_rpu_l) = { "xtal", "rpu_l_pll" };
+PNAME(mux_rpu_l_mips) = { "rpu_l_pll_mux", "mips_pll_mux" };
+PNAME(mux_xtal_wifi) = { "xtal", "wifi_pll" };
+PNAME(mux_xtal_wifi_div4) = { "xtal", "wifi_div4" };
+PNAME(mux_xtal_wifi_div8) = { "xtal", "wifi_div8" };
+PNAME(mux_wifi_div4_rpu_l) = { "wifi_pll_gate", "wifi_div4_mux",
+ "rpu_l_pll_mux" };
+PNAME(mux_xtal_sys) = { "xtal", "sys_pll" };
+PNAME(mux_sys_enet) = { "sys_internal_div", "enet_in" };
+PNAME(mux_audio_sys) = { "audio_pll_mux", "sys_internal_div" };
+PNAME(mux_sys_bt) = { "sys_internal_div", "bt_pll_mux" };
+PNAME(mux_xtal_bt) = { "xtal", "bt_pll" };
+
+static struct pistachio_mux pistachio_muxes[] __initdata = {
+ MUX(CLK_AUDIO_REF_MUX, "audio_refclk_mux", mux_xtal_audio_refclk,
+ 0x200, 0),
+ MUX(CLK_MIPS_PLL_MUX, "mips_pll_mux", mux_xtal_mips, 0x200, 1),
+ MUX(CLK_AUDIO_PLL_MUX, "audio_pll_mux", mux_xtal_audio, 0x200, 2),
+ MUX(CLK_AUDIO_MUX, "audio_mux", mux_audio_debug, 0x200, 4),
+ MUX(CLK_RPU_V_PLL_MUX, "rpu_v_pll_mux", mux_xtal_rpu_v, 0x200, 5),
+ MUX(CLK_RPU_L_PLL_MUX, "rpu_l_pll_mux", mux_xtal_rpu_l, 0x200, 6),
+ MUX(CLK_RPU_L_MUX, "rpu_l_mux", mux_rpu_l_mips, 0x200, 7),
+ MUX(CLK_WIFI_PLL_MUX, "wifi_pll_mux", mux_xtal_wifi, 0x200, 8),
+ MUX(CLK_WIFI_DIV4_MUX, "wifi_div4_mux", mux_xtal_wifi_div4, 0x200, 9),
+ MUX(CLK_WIFI_DIV8_MUX, "wifi_div8_mux", mux_xtal_wifi_div8, 0x200, 10),
+ MUX(CLK_RPU_CORE_MUX, "rpu_core_mux", mux_wifi_div4_rpu_l, 0x200, 11),
+ MUX(CLK_SYS_PLL_MUX, "sys_pll_mux", mux_xtal_sys, 0x200, 13),
+ MUX(CLK_ENET_MUX, "enet_mux", mux_sys_enet, 0x200, 14),
+ MUX(CLK_EVENT_TIMER_MUX, "event_timer_mux", mux_audio_sys, 0x200, 15),
+ MUX(CLK_SD_HOST_MUX, "sd_host_mux", mux_sys_bt, 0x200, 16),
+ MUX(CLK_BT_PLL_MUX, "bt_pll_mux", mux_xtal_bt, 0x200, 17),
+};
+
+static struct pistachio_pll pistachio_plls[] __initdata = {
+ PLL_FIXED(CLK_MIPS_PLL, "mips_pll", "xtal", PLL_GF40LP_LAINT, 0x0),
+ PLL_FIXED(CLK_AUDIO_PLL, "audio_pll", "audio_refclk_mux",
+ PLL_GF40LP_FRAC, 0xc),
+ PLL_FIXED(CLK_RPU_V_PLL, "rpu_v_pll", "xtal", PLL_GF40LP_LAINT, 0x20),
+ PLL_FIXED(CLK_RPU_L_PLL, "rpu_l_pll", "xtal", PLL_GF40LP_LAINT, 0x2c),
+ PLL_FIXED(CLK_SYS_PLL, "sys_pll", "xtal", PLL_GF40LP_FRAC, 0x38),
+ PLL_FIXED(CLK_WIFI_PLL, "wifi_pll", "xtal", PLL_GF40LP_FRAC, 0x4c),
+ PLL_FIXED(CLK_BT_PLL, "bt_pll", "xtal", PLL_GF40LP_LAINT, 0x60),
+};
+
+PNAME(mux_debug) = { "mips_pll_mux", "rpu_v_pll_mux",
+ "rpu_l_pll_mux", "sys_pll_mux",
+ "wifi_pll_mux", "bt_pll_mux" };
+static u32 mux_debug_idx[] = { 0x0, 0x1, 0x2, 0x4, 0x8, 0x10 };
+
+static unsigned int pistachio_critical_clks[] __initdata = {
+ CLK_MIPS,
+ CLK_PERIPH_SYS,
+};
+
+static void __init pistachio_clk_init(struct device_node *np)
+{
+ struct pistachio_clk_provider *p;
+ struct clk *debug_clk;
+
+ p = pistachio_clk_alloc_provider(np, CLK_NR_CLKS);
+ if (!p)
+ return;
+
+ pistachio_clk_register_pll(p, pistachio_plls,
+ ARRAY_SIZE(pistachio_plls));
+ pistachio_clk_register_mux(p, pistachio_muxes,
+ ARRAY_SIZE(pistachio_muxes));
+ pistachio_clk_register_div(p, pistachio_divs,
+ ARRAY_SIZE(pistachio_divs));
+ pistachio_clk_register_fixed_factor(p, pistachio_ffs,
+ ARRAY_SIZE(pistachio_ffs));
+ pistachio_clk_register_gate(p, pistachio_gates,
+ ARRAY_SIZE(pistachio_gates));
+
+ debug_clk = clk_register_mux_table(NULL, "debug_mux", mux_debug,
+ ARRAY_SIZE(mux_debug),
+ CLK_SET_RATE_NO_REPARENT,
+ p->base + 0x200, 18, 0x1f, 0,
+ mux_debug_idx, NULL);
+ p->clk_data.clks[CLK_DEBUG_MUX] = debug_clk;
+
+ pistachio_clk_register_provider(p);
+
+ pistachio_clk_force_enable(p, pistachio_critical_clks,
+ ARRAY_SIZE(pistachio_critical_clks));
+}
+CLK_OF_DECLARE(pistachio_clk, "img,pistachio-clk", pistachio_clk_init);
--
2.2.0.rc0.207.ga3a616c
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/