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linux/drivers/clk/pxa/clk-pxa25x.c

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation version 2 of the license extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 315 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190115.503150771@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-01 16:08:55 +08:00
// SPDX-License-Identifier: GPL-2.0-only
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
/*
* Marvell PXA25x family clocks
*
* Copyright (C) 2014 Robert Jarzmik
*
* Heavily inspired from former arch/arm/mach-pxa/pxa25x.c.
*
* For non-devicetree platforms. Once pxa is fully converted to devicetree, this
* should go away.
*/
#include <linux/clk-provider.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/io.h>
#include <linux/of.h>
#include <mach/pxa2xx-regs.h>
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
#include <mach/smemc.h>
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
#include <dt-bindings/clock/pxa-clock.h>
#include "clk-pxa.h"
#define KHz 1000
#define MHz (1000 * 1000)
enum {
PXA_CORE_RUN = 0,
PXA_CORE_TURBO,
};
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
#define PXA25x_CLKCFG(T) \
(CLKCFG_FCS | \
((T) ? CLKCFG_TURBO : 0))
#define PXA25x_CCCR(N2, M, L) (N2 << 7 | M << 5 | L)
#define MDCNFG_DRAC2(mdcnfg) (((mdcnfg) >> 21) & 0x3)
#define MDCNFG_DRAC0(mdcnfg) (((mdcnfg) >> 5) & 0x3)
/* Define the refresh period in mSec for the SDRAM and the number of rows */
#define SDRAM_TREF 64 /* standard 64ms SDRAM */
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
/*
* Various clock factors driven by the CCCR register.
*/
/* Crystal Frequency to Memory Frequency Multiplier (L) */
static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, };
/* Memory Frequency to Run Mode Frequency Multiplier (M) */
static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 };
/* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */
/* Note: we store the value N * 2 here. */
static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 };
static const char * const get_freq_khz[] = {
"core", "run", "cpll", "memory"
};
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
static int get_sdram_rows(void)
{
static int sdram_rows;
unsigned int drac2 = 0, drac0 = 0;
u32 mdcnfg;
if (sdram_rows)
return sdram_rows;
mdcnfg = readl_relaxed(MDCNFG);
if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
drac2 = MDCNFG_DRAC2(mdcnfg);
if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
drac0 = MDCNFG_DRAC0(mdcnfg);
sdram_rows = 1 << (11 + max(drac0, drac2));
return sdram_rows;
}
static u32 mdrefr_dri(unsigned int freq_khz)
{
u32 interval = freq_khz * SDRAM_TREF / get_sdram_rows();
return interval / 32;
}
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
/*
* Get the clock frequency as reflected by CCCR and the turbo flag.
* We assume these values have been applied via a fcs.
* If info is not 0 we also display the current settings.
*/
unsigned int pxa25x_get_clk_frequency_khz(int info)
{
struct clk *clk;
unsigned long clks[5];
int i;
for (i = 0; i < ARRAY_SIZE(get_freq_khz); i++) {
clk = clk_get(NULL, get_freq_khz[i]);
if (IS_ERR(clk)) {
clks[i] = 0;
} else {
clks[i] = clk_get_rate(clk);
clk_put(clk);
}
}
if (info) {
pr_info("Run Mode clock: %ld.%02ldMHz\n",
clks[1] / 1000000, (clks[1] % 1000000) / 10000);
pr_info("Turbo Mode clock: %ld.%02ldMHz\n",
clks[2] / 1000000, (clks[2] % 1000000) / 10000);
pr_info("Memory clock: %ld.%02ldMHz\n",
clks[3] / 1000000, (clks[3] % 1000000) / 10000);
}
clk: pxa: fix core frequency reporting unit Legacy drivers which are not yet ported, such as cpufreq-pxa[23]xx, rely on pxaXXx_get_clk_frequency_khz() to find the CPU core frequency. This reporting was broken because the expected unit is kHz and not Hz. Fix the reporting for pxa25x, pxa27x and pxa3xx. Fixes: fe7710fae477 ("clk: add pxa25x clock drivers") Fixes: d40670dc6169 ("clk: add pxa27x clock drivers") Fixes: 9bbb8a338fb2 ("clk: pxa: add pxa3xx clock driver") Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-13 04:49:53 +08:00
return (unsigned int)clks[0] / KHz;
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
}
static unsigned long clk_pxa25x_memory_get_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
ARM: pxa: define clock registers as __iomem We should not dereference registers as pointers, so use readl/writel instead for these registers. The clock registers are accessed in multiple files, so we have to change them all at once. I stumbled over these registers while looking at something unrelated. There are in fact other registers with the same problem, but I did not try to address those at this point. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
2016-01-29 22:06:25 +08:00
unsigned long cccr = readl(CCCR);
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
unsigned int m = M_clk_mult[(cccr >> 5) & 0x03];
return parent_rate / m;
}
PARENTS(clk_pxa25x_memory) = { "run" };
RATE_RO_OPS(clk_pxa25x_memory, "memory");
PARENTS(pxa25x_pbus95) = { "ppll_95_85mhz", "ppll_95_85mhz" };
PARENTS(pxa25x_pbus147) = { "ppll_147_46mhz", "ppll_147_46mhz" };
PARENTS(pxa25x_osc3) = { "osc_3_6864mhz", "osc_3_6864mhz" };
#define PXA25X_CKEN(dev_id, con_id, parents, mult, div, \
bit, is_lp, flags) \
PXA_CKEN(dev_id, con_id, bit, parents, mult, div, mult, div, \
ARM: pxa: define clock registers as __iomem We should not dereference registers as pointers, so use readl/writel instead for these registers. The clock registers are accessed in multiple files, so we have to change them all at once. I stumbled over these registers while looking at something unrelated. There are in fact other registers with the same problem, but I did not try to address those at this point. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
2016-01-29 22:06:25 +08:00
is_lp, CKEN, CKEN_ ## bit, flags)
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
#define PXA25X_PBUS95_CKEN(dev_id, con_id, bit, mult_hp, div_hp, delay) \
PXA25X_CKEN(dev_id, con_id, pxa25x_pbus95_parents, mult_hp, \
div_hp, bit, NULL, 0)
#define PXA25X_PBUS147_CKEN(dev_id, con_id, bit, mult_hp, div_hp, delay)\
PXA25X_CKEN(dev_id, con_id, pxa25x_pbus147_parents, mult_hp, \
div_hp, bit, NULL, 0)
#define PXA25X_OSC3_CKEN(dev_id, con_id, bit, mult_hp, div_hp, delay) \
PXA25X_CKEN(dev_id, con_id, pxa25x_osc3_parents, mult_hp, \
div_hp, bit, NULL, 0)
#define PXA25X_CKEN_1RATE(dev_id, con_id, bit, parents, delay) \
PXA_CKEN_1RATE(dev_id, con_id, bit, parents, \
ARM: pxa: define clock registers as __iomem We should not dereference registers as pointers, so use readl/writel instead for these registers. The clock registers are accessed in multiple files, so we have to change them all at once. I stumbled over these registers while looking at something unrelated. There are in fact other registers with the same problem, but I did not try to address those at this point. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
2016-01-29 22:06:25 +08:00
CKEN, CKEN_ ## bit, 0)
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
#define PXA25X_CKEN_1RATE_AO(dev_id, con_id, bit, parents, delay) \
PXA_CKEN_1RATE(dev_id, con_id, bit, parents, \
ARM: pxa: define clock registers as __iomem We should not dereference registers as pointers, so use readl/writel instead for these registers. The clock registers are accessed in multiple files, so we have to change them all at once. I stumbled over these registers while looking at something unrelated. There are in fact other registers with the same problem, but I did not try to address those at this point. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
2016-01-29 22:06:25 +08:00
CKEN, CKEN_ ## bit, CLK_IGNORE_UNUSED)
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
static struct desc_clk_cken pxa25x_clocks[] __initdata = {
PXA25X_PBUS95_CKEN("pxa2xx-mci.0", NULL, MMC, 1, 5, 0),
PXA25X_PBUS95_CKEN("pxa2xx-i2c.0", NULL, I2C, 1, 3, 0),
PXA25X_PBUS95_CKEN("pxa2xx-ir", "FICPCLK", FICP, 1, 2, 0),
PXA25X_PBUS95_CKEN("pxa25x-udc", NULL, USB, 1, 2, 5),
PXA25X_PBUS147_CKEN("pxa2xx-uart.0", NULL, FFUART, 1, 10, 1),
PXA25X_PBUS147_CKEN("pxa2xx-uart.1", NULL, BTUART, 1, 10, 1),
PXA25X_PBUS147_CKEN("pxa2xx-uart.2", NULL, STUART, 1, 10, 1),
PXA25X_PBUS147_CKEN("pxa2xx-uart.3", NULL, HWUART, 1, 10, 1),
PXA25X_PBUS147_CKEN("pxa2xx-i2s", NULL, I2S, 1, 10, 0),
PXA25X_PBUS147_CKEN(NULL, "AC97CLK", AC97, 1, 12, 0),
PXA25X_OSC3_CKEN("pxa25x-ssp.0", NULL, SSP, 1, 1, 0),
PXA25X_OSC3_CKEN("pxa25x-nssp.1", NULL, NSSP, 1, 1, 0),
PXA25X_OSC3_CKEN("pxa25x-nssp.2", NULL, ASSP, 1, 1, 0),
PXA25X_OSC3_CKEN("pxa25x-pwm.0", NULL, PWM0, 1, 1, 0),
PXA25X_OSC3_CKEN("pxa25x-pwm.1", NULL, PWM1, 1, 1, 0),
PXA25X_CKEN_1RATE("pxa2xx-fb", NULL, LCD, clk_pxa25x_memory_parents, 0),
PXA25X_CKEN_1RATE_AO("pxa2xx-pcmcia", NULL, MEMC,
clk_pxa25x_memory_parents, 0),
};
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
/*
* In this table, PXA25x_CCCR(N2, M, L) has the following meaning, where :
* - freq_cpll = n * m * L * 3.6864 MHz
* - n = N2 / 2
* - m = 2^(M - 1), where 1 <= M <= 3
* - l = L_clk_mult[L], ie. { 0, 27, 32, 36, 40, 45, 0, }[L]
*/
static struct pxa2xx_freq pxa25x_freqs[] = {
/* CPU MEMBUS CCCR DIV2 CCLKCFG */
{ 99532800, 99500, PXA25x_CCCR(2, 1, 1), 1, PXA25x_CLKCFG(1)},
{199065600, 99500, PXA25x_CCCR(4, 1, 1), 0, PXA25x_CLKCFG(1)},
{298598400, 99500, PXA25x_CCCR(3, 2, 1), 0, PXA25x_CLKCFG(1)},
{398131200, 99500, PXA25x_CCCR(4, 2, 1), 0, PXA25x_CLKCFG(1)},
};
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
static u8 clk_pxa25x_core_get_parent(struct clk_hw *hw)
{
unsigned long clkcfg;
unsigned int t;
asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg));
t = clkcfg & (1 << 0);
if (t)
return PXA_CORE_TURBO;
return PXA_CORE_RUN;
}
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
static int clk_pxa25x_core_set_parent(struct clk_hw *hw, u8 index)
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
{
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
if (index > PXA_CORE_TURBO)
return -EINVAL;
pxa2xx_core_turbo_switch(index == PXA_CORE_TURBO);
return 0;
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
}
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
static int clk_pxa25x_core_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
return __clk_mux_determine_rate(hw, req);
}
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
PARENTS(clk_pxa25x_core) = { "run", "cpll" };
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
MUX_OPS(clk_pxa25x_core, "core", CLK_SET_RATE_PARENT);
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
static unsigned long clk_pxa25x_run_get_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
ARM: pxa: define clock registers as __iomem We should not dereference registers as pointers, so use readl/writel instead for these registers. The clock registers are accessed in multiple files, so we have to change them all at once. I stumbled over these registers while looking at something unrelated. There are in fact other registers with the same problem, but I did not try to address those at this point. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
2016-01-29 22:06:25 +08:00
unsigned long cccr = readl(CCCR);
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
unsigned int n2 = N2_clk_mult[(cccr >> 7) & 0x07];
return (parent_rate / n2) * 2;
}
PARENTS(clk_pxa25x_run) = { "cpll" };
RATE_RO_OPS(clk_pxa25x_run, "run");
static unsigned long clk_pxa25x_cpll_get_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
ARM: pxa: define clock registers as __iomem We should not dereference registers as pointers, so use readl/writel instead for these registers. The clock registers are accessed in multiple files, so we have to change them all at once. I stumbled over these registers while looking at something unrelated. There are in fact other registers with the same problem, but I did not try to address those at this point. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
2016-01-29 22:06:25 +08:00
unsigned long clkcfg, cccr = readl(CCCR);
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
unsigned int l, m, n2, t;
asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg));
t = clkcfg & (1 << 0);
l = L_clk_mult[(cccr >> 0) & 0x1f];
m = M_clk_mult[(cccr >> 5) & 0x03];
n2 = N2_clk_mult[(cccr >> 7) & 0x07];
clk: pxa: core pll is not affected by t bit The t bit of clkfcfg doesn't affect the core pll clock, but it makes core clock select between core pll clock and core run clock. As such remove it from the core pll rate reporting function, while it remains in clk_pxa27x_core_get_parent(). Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-10-23 20:19:27 +08:00
return m * l * n2 * parent_rate / 2;
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
}
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
static int clk_pxa25x_cpll_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
return pxa2xx_determine_rate(req, pxa25x_freqs,
ARRAY_SIZE(pxa25x_freqs));
}
static int clk_pxa25x_cpll_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
int i;
pr_debug("%s(rate=%lu parent_rate=%lu)\n", __func__, rate, parent_rate);
for (i = 0; i < ARRAY_SIZE(pxa25x_freqs); i++)
if (pxa25x_freqs[i].cpll == rate)
break;
if (i >= ARRAY_SIZE(pxa25x_freqs))
return -EINVAL;
pxa2xx_cpll_change(&pxa25x_freqs[i], mdrefr_dri, MDREFR, CCCR);
return 0;
}
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
PARENTS(clk_pxa25x_cpll) = { "osc_3_6864mhz" };
clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq This is the initial stage to transfer the pxa25x and pxa27x CPU clocks handling from cpufreq to the clock API. More precisely, the clocks transferred are : - cpll : core pll, known also as the CPU core turbo frequency - core : core, known also as the CPU actual frequency, being either the CPU core turbo frequency or the CPU core run frequency This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so that it can become, at least in devicetree builds, the casual cpufreq-dt driver. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-03 05:33:06 +08:00
RATE_OPS(clk_pxa25x_cpll, "cpll");
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
static void __init pxa25x_register_core(void)
{
clk: pxa: export core clocks pxaxxx_get_clk_frequency_khz() needs several clocks to be available through clk_get(), ie. the cpu clocks, system bus clock and memory clocks. Add the missing clkdev so that their rate can be acquired. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-10-23 20:19:29 +08:00
clkdev_pxa_register(CLK_NONE, "cpll", NULL,
clk_register_clk_pxa25x_cpll());
clkdev_pxa_register(CLK_NONE, "run", NULL,
clk_register_clk_pxa25x_run());
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
clkdev_pxa_register(CLK_CORE, "core", NULL,
clk_register_clk_pxa25x_core());
}
static void __init pxa25x_register_plls(void)
{
clk_register_fixed_rate(NULL, "osc_3_6864mhz", NULL,
clk: pxa: Remove CLK_IS_ROOT This flag is a no-op now. Remove usage of the flag. Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-03-02 02:59:56 +08:00
CLK_GET_RATE_NOCACHE, 3686400);
clk: pxa: export 32kHz PLL This clock is especially used by the RTC driver, so export it so that devicetree users can use it. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-06-28 03:41:23 +08:00
clkdev_pxa_register(CLK_OSC32k768, "osc_32_768khz", NULL,
clk_register_fixed_rate(NULL, "osc_32_768khz", NULL,
CLK_GET_RATE_NOCACHE,
32768));
clk: pxa: Remove CLK_IS_ROOT This flag is a no-op now. Remove usage of the flag. Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-03-02 02:59:56 +08:00
clk_register_fixed_rate(NULL, "clk_dummy", NULL, 0, 0);
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
clk_register_fixed_factor(NULL, "ppll_95_85mhz", "osc_3_6864mhz",
0, 26, 1);
clk_register_fixed_factor(NULL, "ppll_147_46mhz", "osc_3_6864mhz",
0, 40, 1);
}
static void __init pxa25x_base_clocks_init(void)
{
pxa25x_register_plls();
pxa25x_register_core();
clk: pxa: export core clocks pxaxxx_get_clk_frequency_khz() needs several clocks to be available through clk_get(), ie. the cpu clocks, system bus clock and memory clocks. Add the missing clkdev so that their rate can be acquired. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-10-23 20:19:29 +08:00
clkdev_pxa_register(CLK_NONE, "system_bus", NULL,
clk_register_clk_pxa25x_memory());
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
}
#define DUMMY_CLK(_con_id, _dev_id, _parent) \
{ .con_id = _con_id, .dev_id = _dev_id, .parent = _parent }
struct dummy_clk {
const char *con_id;
const char *dev_id;
const char *parent;
};
static struct dummy_clk dummy_clks[] __initdata = {
DUMMY_CLK(NULL, "pxa25x-gpio", "osc_32_768khz"),
DUMMY_CLK(NULL, "pxa26x-gpio", "osc_32_768khz"),
DUMMY_CLK("GPIO11_CLK", NULL, "osc_3_6864mhz"),
DUMMY_CLK("GPIO12_CLK", NULL, "osc_32_768khz"),
DUMMY_CLK(NULL, "sa1100-rtc", "osc_32_768khz"),
clk: pxa25x: OSTIMER0 clocks from the main oscillator The OSTIMER0 clock ticks at the main oscillator rate, not the 32kHz oscillator rate. Ensure that it is parented to the main oscillator. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
2016-09-20 03:12:12 +08:00
DUMMY_CLK("OSTIMER0", NULL, "osc_3_6864mhz"),
clk: add pxa25x clock drivers Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk. In the move : - convert to new clock framework legacy clocks - provide clocks as before for platform data based boards - provide clocks through devicetree with clk-pxa-dt This is the preliminary step in the conversion. The remaining steps are : - pxa3xx - once PXA is fully converted to device tree, if that happens, clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot be described in devicetree. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Tested-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-11-11 22:53:25 +08:00
DUMMY_CLK("UARTCLK", "pxa2xx-ir", "STUART"),
};
static void __init pxa25x_dummy_clocks_init(void)
{
struct clk *clk;
struct dummy_clk *d;
const char *name;
int i;
/*
* All pinctrl logic has been wiped out of the clock driver, especially
* for gpio11 and gpio12 outputs. Machine code should ensure proper pin
* control (ie. pxa2xx_mfp_config() invocation).
*/
for (i = 0; i < ARRAY_SIZE(dummy_clks); i++) {
d = &dummy_clks[i];
name = d->dev_id ? d->dev_id : d->con_id;
clk = clk_register_fixed_factor(NULL, name, d->parent, 0, 1, 1);
clk_register_clkdev(clk, d->con_id, d->dev_id);
}
}
int __init pxa25x_clocks_init(void)
{
pxa25x_base_clocks_init();
pxa25x_dummy_clocks_init();
return clk_pxa_cken_init(pxa25x_clocks, ARRAY_SIZE(pxa25x_clocks));
}
static void __init pxa25x_dt_clocks_init(struct device_node *np)
{
pxa25x_clocks_init();
clk_pxa_dt_common_init(np);
}
CLK_OF_DECLARE(pxa25x_clks, "marvell,pxa250-core-clocks",
pxa25x_dt_clocks_init);
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