mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
fd26031ba6
The Berlin clock driver was sharing a DT node with the pin controller and the reset driver. All these devices are now sub-nodes of the chip controller. This patch rework the Berlin clock driver to allow moving the Berlin clock DT bindings into their own sub-node of the chip controller node. Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
389 lines
11 KiB
C
389 lines
11 KiB
C
/*
|
|
* Copyright (c) 2014 Marvell Technology Group Ltd.
|
|
*
|
|
* Alexandre Belloni <alexandre.belloni@free-electrons.com>
|
|
* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <dt-bindings/clock/berlin2q.h>
|
|
|
|
#include "berlin2-div.h"
|
|
#include "berlin2-pll.h"
|
|
#include "common.h"
|
|
|
|
#define REG_PINMUX0 0x0018
|
|
#define REG_PINMUX5 0x002c
|
|
#define REG_SYSPLLCTL0 0x0030
|
|
#define REG_SYSPLLCTL4 0x0040
|
|
#define REG_CLKENABLE 0x00e8
|
|
#define REG_CLKSELECT0 0x00ec
|
|
#define REG_CLKSELECT1 0x00f0
|
|
#define REG_CLKSELECT2 0x00f4
|
|
#define REG_CLKSWITCH0 0x00f8
|
|
#define REG_CLKSWITCH1 0x00fc
|
|
#define REG_SW_GENERIC0 0x0110
|
|
#define REG_SW_GENERIC3 0x011c
|
|
#define REG_SDIO0XIN_CLKCTL 0x0158
|
|
#define REG_SDIO1XIN_CLKCTL 0x015c
|
|
|
|
#define MAX_CLKS 27
|
|
static struct clk *clks[MAX_CLKS];
|
|
static struct clk_onecell_data clk_data;
|
|
static DEFINE_SPINLOCK(lock);
|
|
static void __iomem *gbase;
|
|
static void __iomem *cpupll_base;
|
|
|
|
enum {
|
|
REFCLK,
|
|
SYSPLL, CPUPLL,
|
|
AVPLL_B1, AVPLL_B2, AVPLL_B3, AVPLL_B4,
|
|
AVPLL_B5, AVPLL_B6, AVPLL_B7, AVPLL_B8,
|
|
};
|
|
|
|
static const char *clk_names[] = {
|
|
[REFCLK] = "refclk",
|
|
[SYSPLL] = "syspll",
|
|
[CPUPLL] = "cpupll",
|
|
[AVPLL_B1] = "avpll_b1",
|
|
[AVPLL_B2] = "avpll_b2",
|
|
[AVPLL_B3] = "avpll_b3",
|
|
[AVPLL_B4] = "avpll_b4",
|
|
[AVPLL_B5] = "avpll_b5",
|
|
[AVPLL_B6] = "avpll_b6",
|
|
[AVPLL_B7] = "avpll_b7",
|
|
[AVPLL_B8] = "avpll_b8",
|
|
};
|
|
|
|
static const struct berlin2_pll_map bg2q_pll_map __initconst = {
|
|
.vcodiv = {1, 0, 2, 0, 3, 4, 0, 6, 8},
|
|
.mult = 1,
|
|
.fbdiv_shift = 7,
|
|
.rfdiv_shift = 2,
|
|
.divsel_shift = 9,
|
|
};
|
|
|
|
static const u8 default_parent_ids[] = {
|
|
SYSPLL, AVPLL_B4, AVPLL_B5, AVPLL_B6, AVPLL_B7, SYSPLL
|
|
};
|
|
|
|
static const struct berlin2_div_data bg2q_divs[] __initconst = {
|
|
{
|
|
.name = "sys",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 0),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 0),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 3),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 3),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 4),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 5),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = CLK_IGNORE_UNUSED,
|
|
},
|
|
{
|
|
.name = "drmfigo",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 17),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 6),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 9),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 6),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 7),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 8),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "cfg",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 1),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 12),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 15),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 9),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 10),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 11),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "gfx2d",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 4),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 18),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 21),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 12),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 13),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 14),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "zsp",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 6),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT0, 24),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT0, 27),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 15),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 16),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 17),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "perif",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 7),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 0),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 3),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 18),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 19),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 20),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = CLK_IGNORE_UNUSED,
|
|
},
|
|
{
|
|
.name = "pcube",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 2),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 6),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 9),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 21),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 22),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 23),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "vscope",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 3),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 12),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 15),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 24),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 25),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 26),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "nfc_ecc",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 19),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 18),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 21),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 27),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 28),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH0, 29),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "vpp",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 21),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT1, 24),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT1, 27),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH0, 30),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH0, 31),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 0),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "app",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_DIV_GATE(REG_CLKENABLE, 20),
|
|
BERLIN2_PLL_SELECT(REG_CLKSELECT2, 0),
|
|
BERLIN2_DIV_SELECT(REG_CLKSELECT2, 3),
|
|
BERLIN2_PLL_SWITCH(REG_CLKSWITCH1, 1),
|
|
BERLIN2_DIV_SWITCH(REG_CLKSWITCH1, 2),
|
|
BERLIN2_DIV_D3SWITCH(REG_CLKSWITCH1, 3),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "sdio0xin",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_SINGLE_DIV(REG_SDIO0XIN_CLKCTL),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
{
|
|
.name = "sdio1xin",
|
|
.parent_ids = default_parent_ids,
|
|
.num_parents = ARRAY_SIZE(default_parent_ids),
|
|
.map = {
|
|
BERLIN2_SINGLE_DIV(REG_SDIO1XIN_CLKCTL),
|
|
},
|
|
.div_flags = BERLIN2_DIV_HAS_GATE | BERLIN2_DIV_HAS_MUX,
|
|
.flags = 0,
|
|
},
|
|
};
|
|
|
|
static const struct berlin2_gate_data bg2q_gates[] __initconst = {
|
|
{ "gfx2daxi", "perif", 5 },
|
|
{ "geth0", "perif", 8 },
|
|
{ "sata", "perif", 9 },
|
|
{ "ahbapb", "perif", 10, CLK_IGNORE_UNUSED },
|
|
{ "usb0", "perif", 11 },
|
|
{ "usb1", "perif", 12 },
|
|
{ "usb2", "perif", 13 },
|
|
{ "usb3", "perif", 14 },
|
|
{ "pbridge", "perif", 15, CLK_IGNORE_UNUSED },
|
|
{ "sdio", "perif", 16, CLK_IGNORE_UNUSED },
|
|
{ "nfc", "perif", 18 },
|
|
{ "pcie", "perif", 22 },
|
|
};
|
|
|
|
static void __init berlin2q_clock_setup(struct device_node *np)
|
|
{
|
|
struct device_node *parent_np = of_get_parent(np);
|
|
const char *parent_names[9];
|
|
struct clk *clk;
|
|
int n;
|
|
|
|
gbase = of_iomap(parent_np, 0);
|
|
if (!gbase) {
|
|
pr_err("%s: Unable to map global base\n", np->full_name);
|
|
return;
|
|
}
|
|
|
|
/* BG2Q CPU PLL is not part of global registers */
|
|
cpupll_base = of_iomap(parent_np, 1);
|
|
if (!cpupll_base) {
|
|
pr_err("%s: Unable to map cpupll base\n", np->full_name);
|
|
iounmap(gbase);
|
|
return;
|
|
}
|
|
|
|
/* overwrite default clock names with DT provided ones */
|
|
clk = of_clk_get_by_name(np, clk_names[REFCLK]);
|
|
if (!IS_ERR(clk)) {
|
|
clk_names[REFCLK] = __clk_get_name(clk);
|
|
clk_put(clk);
|
|
}
|
|
|
|
/* simple register PLLs */
|
|
clk = berlin2_pll_register(&bg2q_pll_map, gbase + REG_SYSPLLCTL0,
|
|
clk_names[SYSPLL], clk_names[REFCLK], 0);
|
|
if (IS_ERR(clk))
|
|
goto bg2q_fail;
|
|
|
|
clk = berlin2_pll_register(&bg2q_pll_map, cpupll_base,
|
|
clk_names[CPUPLL], clk_names[REFCLK], 0);
|
|
if (IS_ERR(clk))
|
|
goto bg2q_fail;
|
|
|
|
/* TODO: add BG2Q AVPLL */
|
|
|
|
/*
|
|
* TODO: add reference clock bypass switches:
|
|
* memPLLSWBypass, cpuPLLSWBypass, and sysPLLSWBypass
|
|
*/
|
|
|
|
/* clock divider cells */
|
|
for (n = 0; n < ARRAY_SIZE(bg2q_divs); n++) {
|
|
const struct berlin2_div_data *dd = &bg2q_divs[n];
|
|
int k;
|
|
|
|
for (k = 0; k < dd->num_parents; k++)
|
|
parent_names[k] = clk_names[dd->parent_ids[k]];
|
|
|
|
clks[CLKID_SYS + n] = berlin2_div_register(&dd->map, gbase,
|
|
dd->name, dd->div_flags, parent_names,
|
|
dd->num_parents, dd->flags, &lock);
|
|
}
|
|
|
|
/* clock gate cells */
|
|
for (n = 0; n < ARRAY_SIZE(bg2q_gates); n++) {
|
|
const struct berlin2_gate_data *gd = &bg2q_gates[n];
|
|
|
|
clks[CLKID_GFX2DAXI + n] = clk_register_gate(NULL, gd->name,
|
|
gd->parent_name, gd->flags, gbase + REG_CLKENABLE,
|
|
gd->bit_idx, 0, &lock);
|
|
}
|
|
|
|
/*
|
|
* twdclk is derived from cpu/3
|
|
* TODO: use cpupll until cpuclk is not available
|
|
*/
|
|
clks[CLKID_TWD] =
|
|
clk_register_fixed_factor(NULL, "twd", clk_names[CPUPLL],
|
|
0, 1, 3);
|
|
|
|
/* check for errors on leaf clocks */
|
|
for (n = 0; n < MAX_CLKS; n++) {
|
|
if (!IS_ERR(clks[n]))
|
|
continue;
|
|
|
|
pr_err("%s: Unable to register leaf clock %d\n",
|
|
np->full_name, n);
|
|
goto bg2q_fail;
|
|
}
|
|
|
|
/* register clk-provider */
|
|
clk_data.clks = clks;
|
|
clk_data.clk_num = MAX_CLKS;
|
|
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
|
|
|
|
return;
|
|
|
|
bg2q_fail:
|
|
iounmap(cpupll_base);
|
|
iounmap(gbase);
|
|
}
|
|
CLK_OF_DECLARE(berlin2q_clk, "marvell,berlin2q-clk",
|
|
berlin2q_clock_setup);
|