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clk: meson: add g12a support

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Add basic support for the Amlogic G12A clock controller based on
the AXG driver.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Jerome Brunet 2019-02-11 16:45:01 +01:00 committed by Neil Armstrong
parent f5abfed8e9
commit 912af8423f
4 changed files with 428 additions and 0 deletions
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104
arch/arm/include/asm/arch-meson/clock-g12a.h Normal file
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@ -0,0 +1,104 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2016 - AmLogic, Inc.
* Copyright 2018 - Beniamino Galvani <b.galvani@gmail.com>
* Copyright 2018 - BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#ifndef _ARCH_MESON_CLOCK_G12A_H_
#define _ARCH_MESON_CLOCK_G12A_H_
/*
* Clock controller register offsets
*
* Register offsets from the data sheet are listed in comment blocks below.
* Those offsets must be multiplied by 4 before adding them to the base address
* to get the right value
*/
#define HHI_MIPI_CNTL0 0x000
#define HHI_MIPI_CNTL1 0x004
#define HHI_MIPI_CNTL2 0x008
#define HHI_MIPI_STS 0x00C
#define HHI_GP0_PLL_CNTL0 0x040
#define HHI_GP0_PLL_CNTL1 0x044
#define HHI_GP0_PLL_CNTL2 0x048
#define HHI_GP0_PLL_CNTL3 0x04C
#define HHI_GP0_PLL_CNTL4 0x050
#define HHI_GP0_PLL_CNTL5 0x054
#define HHI_GP0_PLL_CNTL6 0x058
#define HHI_GP0_PLL_STS 0x05C
#define HHI_PCIE_PLL_CNTL0 0x098
#define HHI_PCIE_PLL_CNTL1 0x09C
#define HHI_PCIE_PLL_CNTL2 0x0A0
#define HHI_PCIE_PLL_CNTL3 0x0A4
#define HHI_PCIE_PLL_CNTL4 0x0A8
#define HHI_PCIE_PLL_CNTL5 0x0AC
#define HHI_PCIE_PLL_STS 0x0B8
#define HHI_HIFI_PLL_CNTL0 0x0D8
#define HHI_HIFI_PLL_CNTL1 0x0DC
#define HHI_HIFI_PLL_CNTL2 0x0E0
#define HHI_HIFI_PLL_CNTL3 0x0E4
#define HHI_HIFI_PLL_CNTL4 0x0E8
#define HHI_HIFI_PLL_CNTL5 0x0EC
#define HHI_HIFI_PLL_CNTL6 0x0F0
#define HHI_VIID_CLK_DIV 0x128
#define HHI_VIID_CLK_CNTL 0x12C
#define HHI_GCLK_MPEG0 0x140
#define HHI_GCLK_MPEG1 0x144
#define HHI_GCLK_MPEG2 0x148
#define HHI_GCLK_OTHER 0x150
#define HHI_GCLK_OTHER2 0x154
#define HHI_VID_CLK_DIV 0x164
#define HHI_MPEG_CLK_CNTL 0x174
#define HHI_AUD_CLK_CNTL 0x178
#define HHI_VID_CLK_CNTL 0x17c
#define HHI_TS_CLK_CNTL 0x190
#define HHI_VID_CLK_CNTL2 0x194
#define HHI_SYS_CPU_CLK_CNTL0 0x19c
#define HHI_VID_PLL_CLK_DIV 0x1A0
#define HHI_MALI_CLK_CNTL 0x1b0
#define HHI_VPU_CLKC_CNTL 0x1b4
#define HHI_VPU_CLK_CNTL 0x1bC
#define HHI_HDMI_CLK_CNTL 0x1CC
#define HHI_VDEC_CLK_CNTL 0x1E0
#define HHI_VDEC2_CLK_CNTL 0x1E4
#define HHI_VDEC3_CLK_CNTL 0x1E8
#define HHI_VDEC4_CLK_CNTL 0x1EC
#define HHI_HDCP22_CLK_CNTL 0x1F0
#define HHI_VAPBCLK_CNTL 0x1F4
#define HHI_VPU_CLKB_CNTL 0x20C
#define HHI_GEN_CLK_CNTL 0x228
#define HHI_VDIN_MEAS_CLK_CNTL 0x250
#define HHI_MIPIDSI_PHY_CLK_CNTL 0x254
#define HHI_NAND_CLK_CNTL 0x25C
#define HHI_SD_EMMC_CLK_CNTL 0x264
#define HHI_MPLL_CNTL0 0x278
#define HHI_MPLL_CNTL1 0x27C
#define HHI_MPLL_CNTL2 0x280
#define HHI_MPLL_CNTL3 0x284
#define HHI_MPLL_CNTL4 0x288
#define HHI_MPLL_CNTL5 0x28c
#define HHI_MPLL_CNTL6 0x290
#define HHI_MPLL_CNTL7 0x294
#define HHI_MPLL_CNTL8 0x298
#define HHI_FIX_PLL_CNTL0 0x2A0
#define HHI_FIX_PLL_CNTL1 0x2A4
#define HHI_FIX_PLL_CNTL3 0x2AC
#define HHI_SYS_PLL_CNTL0 0x2f4
#define HHI_SYS_PLL_CNTL1 0x2f8
#define HHI_SYS_PLL_CNTL2 0x2fc
#define HHI_SYS_PLL_CNTL3 0x300
#define HHI_SYS_PLL_CNTL4 0x304
#define HHI_SYS_PLL_CNTL5 0x308
#define HHI_SYS_PLL_CNTL6 0x30c
#define HHI_HDMI_PLL_CNTL0 0x320
#define HHI_HDMI_PLL_CNTL1 0x324
#define HHI_HDMI_PLL_CNTL2 0x328
#define HHI_HDMI_PLL_CNTL3 0x32c
#define HHI_HDMI_PLL_CNTL4 0x330
#define HHI_HDMI_PLL_CNTL5 0x334
#define HHI_HDMI_PLL_CNTL6 0x338
#define HHI_SPICC_CLK_CNTL 0x3dc
#endif

8
drivers/clk/meson/Kconfig
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@ -13,3 +13,11 @@ config CLK_MESON_AXG
help
Enable clock support for the Amlogic AXG SoC family, such as
the A113X/D
config CLK_MESON_G12A
bool "Enable clock support for Amlogic G12A"
depends on CLK && ARCH_MESON
default MESON_G12A
help
Enable clock support for the Amlogic G12A SoC family, such as
the S905X/D2

1
drivers/clk/meson/Makefile
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@ -5,4 +5,5 @@
obj-$(CONFIG_CLK_MESON_GX) += gxbb.o
obj-$(CONFIG_CLK_MESON_AXG) += axg.o
obj-$(CONFIG_CLK_MESON_G12A) += g12a.o

315
drivers/clk/meson/g12a.c Normal file
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@ -0,0 +1,315 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2018 - Beniamino Galvani <b.galvani@gmail.com>
* (C) Copyright 2018 - BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#include <common.h>
#include <asm/arch/clock-g12a.h>
#include <asm/io.h>
#include <clk-uclass.h>
#include <dm.h>
#include <regmap.h>
#include <syscon.h>
#include <div64.h>
#include <dt-bindings/clock/g12a-clkc.h>
#include "clk_meson.h"
#define XTAL_RATE 24000000
struct meson_clk {
struct regmap *map;
};
static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id);
#define NUM_CLKS 178
static struct meson_gate gates[NUM_CLKS] = {
/* Everything Else (EE) domain gates */
MESON_GATE(CLKID_SPICC0, HHI_GCLK_MPEG0, 8),
MESON_GATE(CLKID_I2C, HHI_GCLK_MPEG0, 9),
MESON_GATE(CLKID_UART0, HHI_GCLK_MPEG0, 13),
MESON_GATE(CLKID_SPICC1, HHI_GCLK_MPEG0, 14),
MESON_GATE(CLKID_SD_EMMC_B, HHI_GCLK_MPEG0, 25),
MESON_GATE(CLKID_SD_EMMC_C, HHI_GCLK_MPEG0, 26),
MESON_GATE(CLKID_ETH, HHI_GCLK_MPEG1, 3),
MESON_GATE(CLKID_UART1, HHI_GCLK_MPEG1, 16),
/* Peripheral Gates */
MESON_GATE(CLKID_SD_EMMC_B_CLK0, HHI_SD_EMMC_CLK_CNTL, 23),
MESON_GATE(CLKID_SD_EMMC_C_CLK0, HHI_NAND_CLK_CNTL, 7),
};
static int meson_set_gate(struct clk *clk, bool on)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
struct meson_gate *gate;
if (clk->id >= ARRAY_SIZE(gates))
return -ENOENT;
gate = &gates[clk->id];
if (gate->reg == 0)
return 0;
regmap_update_bits(priv->map, gate->reg,
BIT(gate->bit), on ? BIT(gate->bit) : 0);
return 0;
}
static int meson_clk_enable(struct clk *clk)
{
return meson_set_gate(clk, true);
}
static int meson_clk_disable(struct clk *clk)
{
return meson_set_gate(clk, false);
}
static unsigned long meson_clk81_get_rate(struct clk *clk)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
unsigned long parent_rate;
uint reg;
int parents[] = {
-1,
-1,
CLKID_FCLK_DIV7,
CLKID_MPLL1,
CLKID_MPLL2,
CLKID_FCLK_DIV4,
CLKID_FCLK_DIV3,
CLKID_FCLK_DIV5
};
/* mux */
regmap_read(priv->map, HHI_MPEG_CLK_CNTL, &reg);
reg = (reg >> 12) & 7;
switch (reg) {
case 0:
parent_rate = XTAL_RATE;
break;
case 1:
return -ENOENT;
default:
parent_rate = meson_clk_get_rate_by_id(clk, parents[reg]);
}
/* divider */
regmap_read(priv->map, HHI_MPEG_CLK_CNTL, &reg);
reg = reg & ((1 << 7) - 1);
return parent_rate / reg;
}
static long mpll_rate_from_params(unsigned long parent_rate,
unsigned long sdm,
unsigned long n2)
{
unsigned long divisor = (SDM_DEN * n2) + sdm;
if (n2 < N2_MIN)
return -EINVAL;
return DIV_ROUND_UP_ULL((u64)parent_rate * SDM_DEN, divisor);
}
static struct parm meson_mpll0_parm[2] = {
{HHI_MPLL_CNTL1, 0, 14}, /* psdm */
{HHI_MPLL_CNTL1, 20, 9}, /* pn2 */
};
static struct parm meson_mpll1_parm[2] = {
{HHI_MPLL_CNTL3, 0, 14}, /* psdm */
{HHI_MPLL_CNTL3, 20, 9}, /* pn2 */
};
static struct parm meson_mpll2_parm[2] = {
{HHI_MPLL_CNTL5, 0, 14}, /* psdm */
{HHI_MPLL_CNTL5, 20, 9}, /* pn2 */
};
/*
* MultiPhase Locked Loops are outputs from a PLL with additional frequency
* scaling capabilities. MPLL rates are calculated as:
*
* f(N2_integer, SDM_IN ) = 2.0G/(N2_integer + SDM_IN/16384)
*/
static ulong meson_mpll_get_rate(struct clk *clk, unsigned long id)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
struct parm *psdm, *pn2;
unsigned long sdm, n2;
unsigned long parent_rate;
uint reg;
switch (id) {
case CLKID_MPLL0:
psdm = &meson_mpll0_parm[0];
pn2 = &meson_mpll0_parm[1];
break;
case CLKID_MPLL1:
psdm = &meson_mpll1_parm[0];
pn2 = &meson_mpll1_parm[1];
break;
case CLKID_MPLL2:
psdm = &meson_mpll2_parm[0];
pn2 = &meson_mpll2_parm[1];
break;
default:
return -ENOENT;
}
parent_rate = meson_clk_get_rate_by_id(clk, CLKID_FIXED_PLL);
if (IS_ERR_VALUE(parent_rate))
return parent_rate;
regmap_read(priv->map, psdm->reg_off, &reg);
sdm = PARM_GET(psdm->width, psdm->shift, reg);
regmap_read(priv->map, pn2->reg_off, &reg);
n2 = PARM_GET(pn2->width, pn2->shift, reg);
return mpll_rate_from_params(parent_rate, sdm, n2);
}
static struct parm meson_fixed_pll_parm[3] = {
{HHI_FIX_PLL_CNTL0, 0, 8}, /* pm */
{HHI_FIX_PLL_CNTL0, 10, 5}, /* pn */
{HHI_FIX_PLL_CNTL0, 16, 2}, /* pod */
};
static struct parm meson_sys_pll_parm[3] = {
{HHI_SYS_PLL_CNTL0, 0, 8}, /* pm */
{HHI_SYS_PLL_CNTL0, 10, 5}, /* pn */
{HHI_SYS_PLL_CNTL0, 16, 2}, /* pod */
};
static ulong meson_pll_get_rate(struct clk *clk, unsigned long id)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
struct parm *pm, *pn, *pod;
unsigned long parent_rate_mhz = XTAL_RATE / 1000000;
u16 n, m, od;
uint reg;
/*
* FIXME: Between the unit conversion and the missing frac, we know
* rate will be slightly off ...
*/
switch (id) {
case CLKID_FIXED_PLL:
pm = &meson_fixed_pll_parm[0];
pn = &meson_fixed_pll_parm[1];
pod = &meson_fixed_pll_parm[2];
break;
case CLKID_SYS_PLL:
pm = &meson_sys_pll_parm[0];
pn = &meson_sys_pll_parm[1];
pod = &meson_sys_pll_parm[2];
break;
default:
return -ENOENT;
}
regmap_read(priv->map, pn->reg_off, &reg);
n = PARM_GET(pn->width, pn->shift, reg);
regmap_read(priv->map, pm->reg_off, &reg);
m = PARM_GET(pm->width, pm->shift, reg);
regmap_read(priv->map, pod->reg_off, &reg);
od = PARM_GET(pod->width, pod->shift, reg);
return ((parent_rate_mhz * m / n) >> od) * 1000000;
}
static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id)
{
ulong rate;
switch (id) {
case CLKID_FIXED_PLL:
case CLKID_SYS_PLL:
rate = meson_pll_get_rate(clk, id);
break;
case CLKID_FCLK_DIV2:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 2;
break;
case CLKID_FCLK_DIV3:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 3;
break;
case CLKID_FCLK_DIV4:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 4;
break;
case CLKID_FCLK_DIV5:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 5;
break;
case CLKID_FCLK_DIV7:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 7;
break;
case CLKID_MPLL0:
case CLKID_MPLL1:
case CLKID_MPLL2:
rate = meson_mpll_get_rate(clk, id);
break;
case CLKID_CLK81:
rate = meson_clk81_get_rate(clk);
break;
default:
if (gates[id].reg != 0) {
/* a clock gate */
rate = meson_clk81_get_rate(clk);
break;
}
return -ENOENT;
}
debug("clock %lu has rate %lu\n", id, rate);
return rate;
}
static ulong meson_clk_get_rate(struct clk *clk)
{
return meson_clk_get_rate_by_id(clk, clk->id);
}
static int meson_clk_probe(struct udevice *dev)
{
struct meson_clk *priv = dev_get_priv(dev);
priv->map = syscon_node_to_regmap(dev_get_parent(dev)->node);
if (IS_ERR(priv->map))
return PTR_ERR(priv->map);
debug("meson-clk-g12a: probed\n");
return 0;
}
static struct clk_ops meson_clk_ops = {
.disable = meson_clk_disable,
.enable = meson_clk_enable,
.get_rate = meson_clk_get_rate,
};
static const struct udevice_id meson_clk_ids[] = {
{ .compatible = "amlogic,g12a-clkc" },
{ }
};
U_BOOT_DRIVER(meson_clk_g12a) = {
.name = "meson_clk_g12a",
.id = UCLASS_CLK,
.of_match = meson_clk_ids,
.priv_auto_alloc_size = sizeof(struct meson_clk),
.ops = &meson_clk_ops,
.probe = meson_clk_probe,
};