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alistair23-linux/drivers/clk/mmp/clk-of-mmp2.c
Lubomir Rintel 0ea8cbc15d clk: mmp2: separate LCDC peripheral clk form the display clock 
These are in fact two clocks, they shouldn't be exposed as one. One is
required for accessing LCD controller registers (peripheral clock), while
other (AXI clock) can be optionally used as a pixel clock source for the
panel.

LCDC can alternatively use different clocks than the Display 1 AXI clock
for generating the pixel clock: the second AXI clock (fixed in this
commit too), the HDMI PLL, or the AXI bus clock.

They should really be controlled independently.

Link: https://lists.freedesktop.org/archives/dri-devel/2019-January/203975.html
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-02-21 13:52:02 -08:00

349 lines
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/*
* mmp2 clock framework source file
*
* Copyright (C) 2012 Marvell
* Chao Xie <xiechao.mail@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/of_address.h>
#include <dt-bindings/clock/marvell,mmp2.h>
#include "clk.h"
#include "reset.h"
#define APBC_RTC 0x0
#define APBC_TWSI0 0x4
#define APBC_TWSI1 0x8
#define APBC_TWSI2 0xc
#define APBC_TWSI3 0x10
#define APBC_TWSI4 0x7c
#define APBC_TWSI5 0x80
#define APBC_KPC 0x18
#define APBC_TIMER 0x24
#define APBC_UART0 0x2c
#define APBC_UART1 0x30
#define APBC_UART2 0x34
#define APBC_UART3 0x88
#define APBC_GPIO 0x38
#define APBC_PWM0 0x3c
#define APBC_PWM1 0x40
#define APBC_PWM2 0x44
#define APBC_PWM3 0x48
#define APBC_SSP0 0x50
#define APBC_SSP1 0x54
#define APBC_SSP2 0x58
#define APBC_SSP3 0x5c
#define APMU_SDH0 0x54
#define APMU_SDH1 0x58
#define APMU_SDH2 0xe8
#define APMU_SDH3 0xec
#define APMU_USB 0x5c
#define APMU_DISP0 0x4c
#define APMU_DISP1 0x110
#define APMU_CCIC0 0x50
#define APMU_CCIC1 0xf4
#define MPMU_UART_PLL 0x14
struct mmp2_clk_unit {
struct mmp_clk_unit unit;
void __iomem *mpmu_base;
void __iomem *apmu_base;
void __iomem *apbc_base;
};
static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = {
{MMP2_CLK_CLK32, "clk32", NULL, 0, 32768},
{MMP2_CLK_VCTCXO, "vctcxo", NULL, 0, 26000000},
{MMP2_CLK_PLL1, "pll1", NULL, 0, 800000000},
{MMP2_CLK_PLL2, "pll2", NULL, 0, 960000000},
{MMP2_CLK_USB_PLL, "usb_pll", NULL, 0, 480000000},
};
static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = {
{MMP2_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0},
{MMP2_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0},
{MMP2_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0},
{MMP2_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0},
{MMP2_CLK_PLL1_20, "pll1_20", "pll1_4", 1, 5, 0},
{MMP2_CLK_PLL1_3, "pll1_3", "pll1", 1, 3, 0},
{MMP2_CLK_PLL1_6, "pll1_6", "pll1_3", 1, 2, 0},
{MMP2_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0},
{MMP2_CLK_PLL2_2, "pll2_2", "pll2", 1, 2, 0},
{MMP2_CLK_PLL2_4, "pll2_4", "pll2_2", 1, 2, 0},
{MMP2_CLK_PLL2_8, "pll2_8", "pll2_4", 1, 2, 0},
{MMP2_CLK_PLL2_16, "pll2_16", "pll2_8", 1, 2, 0},
{MMP2_CLK_PLL2_3, "pll2_3", "pll2", 1, 3, 0},
{MMP2_CLK_PLL2_6, "pll2_6", "pll2_3", 1, 2, 0},
{MMP2_CLK_PLL2_12, "pll2_12", "pll2_6", 1, 2, 0},
{MMP2_CLK_VCTCXO_2, "vctcxo_2", "vctcxo", 1, 2, 0},
{MMP2_CLK_VCTCXO_4, "vctcxo_4", "vctcxo_2", 1, 2, 0},
};
static struct mmp_clk_factor_masks uart_factor_masks = {
.factor = 2,
.num_mask = 0x1fff,
.den_mask = 0x1fff,
.num_shift = 16,
.den_shift = 0,
};
static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
{.num = 8125, .den = 1536}, /*14.745MHZ */
{.num = 3521, .den = 689}, /*19.23MHZ */
};
static void mmp2_pll_init(struct mmp2_clk_unit *pxa_unit)
{
struct clk *clk;
struct mmp_clk_unit *unit = &pxa_unit->unit;
mmp_register_fixed_rate_clks(unit, fixed_rate_clks,
ARRAY_SIZE(fixed_rate_clks));
mmp_register_fixed_factor_clks(unit, fixed_factor_clks,
ARRAY_SIZE(fixed_factor_clks));
clk = mmp_clk_register_factor("uart_pll", "pll1_4",
CLK_SET_RATE_PARENT,
pxa_unit->mpmu_base + MPMU_UART_PLL,
&uart_factor_masks, uart_factor_tbl,
ARRAY_SIZE(uart_factor_tbl), NULL);
mmp_clk_add(unit, MMP2_CLK_UART_PLL, clk);
}
static DEFINE_SPINLOCK(uart0_lock);
static DEFINE_SPINLOCK(uart1_lock);
static DEFINE_SPINLOCK(uart2_lock);
static const char *uart_parent_names[] = {"uart_pll", "vctcxo"};
static DEFINE_SPINLOCK(ssp0_lock);
static DEFINE_SPINLOCK(ssp1_lock);
static DEFINE_SPINLOCK(ssp2_lock);
static DEFINE_SPINLOCK(ssp3_lock);
static const char *ssp_parent_names[] = {"vctcxo_4", "vctcxo_2", "vctcxo", "pll1_16"};
static DEFINE_SPINLOCK(timer_lock);
static const char *timer_parent_names[] = {"clk32", "vctcxo_2", "vctcxo_4", "vctcxo"};
static DEFINE_SPINLOCK(reset_lock);
static struct mmp_param_mux_clk apbc_mux_clks[] = {
{0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock},
{0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock},
{0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART2, 4, 3, 0, &uart2_lock},
{0, "uart3_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART3, 4, 3, 0, &uart2_lock},
{0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock},
{0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock},
{0, "ssp2_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP2, 4, 3, 0, &ssp2_lock},
{0, "ssp3_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP3, 4, 3, 0, &ssp3_lock},
{0, "timer_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER, 4, 3, 0, &timer_lock},
};
static struct mmp_param_gate_clk apbc_gate_clks[] = {
{MMP2_CLK_TWSI0, "twsi0_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_TWSI1, "twsi1_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI1, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_TWSI2, "twsi2_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI2, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_TWSI3, "twsi3_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI3, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_TWSI4, "twsi4_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI4, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_TWSI5, "twsi5_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_TWSI5, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x7, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, &reset_lock},
{MMP2_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x87, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, &reset_lock},
{MMP2_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x7, 0x3, 0x0, 0, &reset_lock},
{MMP2_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x7, 0x3, 0x0, 0, &reset_lock},
/* The gate clocks has mux parent. */
{MMP2_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x7, 0x3, 0x0, 0, &uart0_lock},
{MMP2_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x7, 0x3, 0x0, 0, &uart1_lock},
{MMP2_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBC_UART2, 0x7, 0x3, 0x0, 0, &uart2_lock},
{MMP2_CLK_UART3, "uart3_clk", "uart3_mux", CLK_SET_RATE_PARENT, APBC_UART3, 0x7, 0x3, 0x0, 0, &uart2_lock},
{MMP2_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x7, 0x3, 0x0, 0, &ssp0_lock},
{MMP2_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x7, 0x3, 0x0, 0, &ssp1_lock},
{MMP2_CLK_SSP2, "ssp2_clk", "ssp2_mux", CLK_SET_RATE_PARENT, APBC_SSP2, 0x7, 0x3, 0x0, 0, &ssp2_lock},
{MMP2_CLK_SSP3, "ssp3_clk", "ssp3_mux", CLK_SET_RATE_PARENT, APBC_SSP3, 0x7, 0x3, 0x0, 0, &ssp3_lock},
{MMP2_CLK_TIMER, "timer_clk", "timer_mux", CLK_SET_RATE_PARENT, APBC_TIMER, 0x7, 0x3, 0x0, 0, &timer_lock},
};
static void mmp2_apb_periph_clk_init(struct mmp2_clk_unit *pxa_unit)
{
struct mmp_clk_unit *unit = &pxa_unit->unit;
mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base,
ARRAY_SIZE(apbc_mux_clks));
mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base,
ARRAY_SIZE(apbc_gate_clks));
}
static DEFINE_SPINLOCK(sdh_lock);
static const char *sdh_parent_names[] = {"pll1_4", "pll2", "usb_pll", "pll1"};
static struct mmp_clk_mix_config sdh_mix_config = {
.reg_info = DEFINE_MIX_REG_INFO(4, 10, 2, 8, 32),
};
static DEFINE_SPINLOCK(usb_lock);
static DEFINE_SPINLOCK(disp0_lock);
static DEFINE_SPINLOCK(disp1_lock);
static const char *disp_parent_names[] = {"pll1", "pll1_16", "pll2", "vctcxo"};
static DEFINE_SPINLOCK(ccic0_lock);
static DEFINE_SPINLOCK(ccic1_lock);
static const char *ccic_parent_names[] = {"pll1_2", "pll1_16", "vctcxo"};
static struct mmp_clk_mix_config ccic0_mix_config = {
.reg_info = DEFINE_MIX_REG_INFO(4, 17, 2, 6, 32),
};
static struct mmp_clk_mix_config ccic1_mix_config = {
.reg_info = DEFINE_MIX_REG_INFO(4, 16, 2, 6, 32),
};
static struct mmp_param_mux_clk apmu_mux_clks[] = {
{MMP2_CLK_DISP0_MUX, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 2, 0, &disp0_lock},
{MMP2_CLK_DISP1_MUX, "disp1_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP1, 6, 2, 0, &disp1_lock},
};
static struct mmp_param_div_clk apmu_div_clks[] = {
{0, "disp0_div", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 8, 4, 0, &disp0_lock},
{0, "disp0_sphy_div", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 15, 5, 0, &disp0_lock},
{0, "disp1_div", "disp1_mux", CLK_SET_RATE_PARENT, APMU_DISP1, 8, 4, 0, &disp1_lock},
{0, "ccic0_sphy_div", "ccic0_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock},
{0, "ccic1_sphy_div", "ccic1_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC1, 10, 5, 0, &ccic1_lock},
};
static struct mmp_param_gate_clk apmu_gate_clks[] = {
{MMP2_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock},
/* The gate clocks has mux parent. */
{MMP2_CLK_SDH0, "sdh0_clk", "sdh_mix_clk", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh_lock},
{MMP2_CLK_SDH1, "sdh1_clk", "sdh_mix_clk", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh_lock},
{MMP2_CLK_SDH2, "sdh2_clk", "sdh_mix_clk", CLK_SET_RATE_PARENT, APMU_SDH2, 0x1b, 0x1b, 0x0, 0, &sdh_lock},
{MMP2_CLK_SDH3, "sdh3_clk", "sdh_mix_clk", CLK_SET_RATE_PARENT, APMU_SDH3, 0x1b, 0x1b, 0x0, 0, &sdh_lock},
{MMP2_CLK_DISP0, "disp0_clk", "disp0_div", CLK_SET_RATE_PARENT, APMU_DISP0, 0x09, 0x09, 0x0, 0, &disp0_lock},
{MMP2_CLK_DISP0_LCDC, "disp0_lcdc_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x12, 0x12, 0x0, 0, &disp0_lock},
{MMP2_CLK_DISP0_SPHY, "disp0_sphy_clk", "disp0_sphy_div", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1024, 0x1024, 0x0, 0, &disp0_lock},
{MMP2_CLK_DISP1, "disp1_clk", "disp1_div", CLK_SET_RATE_PARENT, APMU_DISP1, 0x09, 0x09, 0x0, 0, &disp1_lock},
{MMP2_CLK_CCIC_ARBITER, "ccic_arbiter", "vctcxo", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1800, 0x1800, 0x0, 0, &ccic0_lock},
{MMP2_CLK_CCIC0, "ccic0_clk", "ccic0_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock},
{MMP2_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock},
{MMP2_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock},
{MMP2_CLK_CCIC1, "ccic1_clk", "ccic1_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC1, 0x1b, 0x1b, 0x0, 0, &ccic1_lock},
{MMP2_CLK_CCIC1_PHY, "ccic1_phy_clk", "ccic1_mix_clk", CLK_SET_RATE_PARENT, APMU_CCIC1, 0x24, 0x24, 0x0, 0, &ccic1_lock},
{MMP2_CLK_CCIC1_SPHY, "ccic1_sphy_clk", "ccic1_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC1, 0x300, 0x300, 0x0, 0, &ccic1_lock},
};
static void mmp2_axi_periph_clk_init(struct mmp2_clk_unit *pxa_unit)
{
struct clk *clk;
struct mmp_clk_unit *unit = &pxa_unit->unit;
sdh_mix_config.reg_info.reg_clk_ctrl = pxa_unit->apmu_base + APMU_SDH0;
clk = mmp_clk_register_mix(NULL, "sdh_mix_clk", sdh_parent_names,
ARRAY_SIZE(sdh_parent_names),
CLK_SET_RATE_PARENT,
&sdh_mix_config, &sdh_lock);
ccic0_mix_config.reg_info.reg_clk_ctrl = pxa_unit->apmu_base + APMU_CCIC0;
clk = mmp_clk_register_mix(NULL, "ccic0_mix_clk", ccic_parent_names,
ARRAY_SIZE(ccic_parent_names),
CLK_SET_RATE_PARENT,
&ccic0_mix_config, &ccic0_lock);
mmp_clk_add(unit, MMP2_CLK_CCIC0_MIX, clk);
ccic1_mix_config.reg_info.reg_clk_ctrl = pxa_unit->apmu_base + APMU_CCIC1;
clk = mmp_clk_register_mix(NULL, "ccic1_mix_clk", ccic_parent_names,
ARRAY_SIZE(ccic_parent_names),
CLK_SET_RATE_PARENT,
&ccic1_mix_config, &ccic1_lock);
mmp_clk_add(unit, MMP2_CLK_CCIC1_MIX, clk);
mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base,
ARRAY_SIZE(apmu_mux_clks));
mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base,
ARRAY_SIZE(apmu_div_clks));
mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base,
ARRAY_SIZE(apmu_gate_clks));
}
static void mmp2_clk_reset_init(struct device_node *np,
struct mmp2_clk_unit *pxa_unit)
{
struct mmp_clk_reset_cell *cells;
int i, nr_resets;
nr_resets = ARRAY_SIZE(apbc_gate_clks);
cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL);
if (!cells)
return;
for (i = 0; i < nr_resets; i++) {
cells[i].clk_id = apbc_gate_clks[i].id;
cells[i].reg = pxa_unit->apbc_base + apbc_gate_clks[i].offset;
cells[i].flags = 0;
cells[i].lock = apbc_gate_clks[i].lock;
cells[i].bits = 0x4;
}
mmp_clk_reset_register(np, cells, nr_resets);
}
static void __init mmp2_clk_init(struct device_node *np)
{
struct mmp2_clk_unit *pxa_unit;
pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);
if (!pxa_unit)
return;
pxa_unit->mpmu_base = of_iomap(np, 0);
if (!pxa_unit->mpmu_base) {
pr_err("failed to map mpmu registers\n");
goto free_memory;
}
pxa_unit->apmu_base = of_iomap(np, 1);
if (!pxa_unit->apmu_base) {
pr_err("failed to map apmu registers\n");
goto unmap_mpmu_region;
}
pxa_unit->apbc_base = of_iomap(np, 2);
if (!pxa_unit->apbc_base) {
pr_err("failed to map apbc registers\n");
goto unmap_apmu_region;
}
mmp_clk_init(np, &pxa_unit->unit, MMP2_NR_CLKS);
mmp2_pll_init(pxa_unit);
mmp2_apb_periph_clk_init(pxa_unit);
mmp2_axi_periph_clk_init(pxa_unit);
mmp2_clk_reset_init(np, pxa_unit);
return;
unmap_apmu_region:
iounmap(pxa_unit->apmu_base);
unmap_mpmu_region:
iounmap(pxa_unit->mpmu_base);
free_memory:
kfree(pxa_unit);
}
CLK_OF_DECLARE(mmp2_clk, "marvell,mmp2-clock", mmp2_clk_init);
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