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linux-stable/drivers/clk/mmp/clk-of-pxa1928.c
Krzysztof Kozlowski f5e75b4aae clk: mmp: pxa1928: drop unused 'clk' variable 
'clk' is assigned but never read:

  drivers/clk/mmp/clk-of-pxa1928.c: In function ‘pxa1928_pll_init’:
  drivers/clk/mmp/clk-of-pxa1928.c:71:14: warning: variable ‘clk’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200916161740.14173-4-krzk@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-09-22 12:44:40 -07:00

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/*
* pxa1928 clock framework source file
*
* Copyright (C) 2015 Linaro, Ltd.
* Rob Herring <robh@kernel.org>
*
* Based on drivers/clk/mmp/clk-of-mmp2.c:
* 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/kernel.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <dt-bindings/clock/marvell,pxa1928.h>
#include "clk.h"
#include "reset.h"
#define MPMU_UART_PLL 0x14
struct pxa1928_clk_unit {
struct mmp_clk_unit unit;
void __iomem *mpmu_base;
void __iomem *apmu_base;
void __iomem *apbc_base;
void __iomem *apbcp_base;
};
static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = {
{0, "clk32", NULL, 0, 32768},
{0, "vctcxo", NULL, 0, 26000000},
{0, "pll1_624", NULL, 0, 624000000},
{0, "pll5p", NULL, 0, 832000000},
{0, "pll5", NULL, 0, 1248000000},
{0, "usb_pll", NULL, 0, 480000000},
};
static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = {
{0, "pll1_d2", "pll1_624", 1, 2, 0},
{0, "pll1_d9", "pll1_624", 1, 9, 0},
{0, "pll1_d12", "pll1_624", 1, 12, 0},
{0, "pll1_d16", "pll1_624", 1, 16, 0},
{0, "pll1_d20", "pll1_624", 1, 20, 0},
{0, "pll1_416", "pll1_624", 2, 3, 0},
{0, "vctcxo_d2", "vctcxo", 1, 2, 0},
{0, "vctcxo_d4", "vctcxo", 1, 4, 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 = 832, .den = 234}, /*58.5MHZ */
{.num = 1, .den = 1}, /*26MHZ */
};
static void pxa1928_pll_init(struct pxa1928_clk_unit *pxa_unit)
{
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));
mmp_clk_register_factor("uart_pll", "pll1_416",
CLK_SET_RATE_PARENT,
pxa_unit->mpmu_base + MPMU_UART_PLL,
&uart_factor_masks, uart_factor_tbl,
ARRAY_SIZE(uart_factor_tbl), NULL);
}
static DEFINE_SPINLOCK(uart0_lock);
static DEFINE_SPINLOCK(uart1_lock);
static DEFINE_SPINLOCK(uart2_lock);
static DEFINE_SPINLOCK(uart3_lock);
static const char *uart_parent_names[] = {"uart_pll", "vctcxo"};
static DEFINE_SPINLOCK(ssp0_lock);
static DEFINE_SPINLOCK(ssp1_lock);
static const char *ssp_parent_names[] = {"vctcxo_d4", "vctcxo_d2", "vctcxo", "pll1_d12"};
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, PXA1928_CLK_UART0 * 4, 4, 3, 0, &uart0_lock},
{0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, PXA1928_CLK_UART1 * 4, 4, 3, 0, &uart1_lock},
{0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, PXA1928_CLK_UART2 * 4, 4, 3, 0, &uart2_lock},
{0, "uart3_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, PXA1928_CLK_UART3 * 4, 4, 3, 0, &uart3_lock},
{0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, PXA1928_CLK_SSP0 * 4, 4, 3, 0, &ssp0_lock},
{0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, PXA1928_CLK_SSP1 * 4, 4, 3, 0, &ssp1_lock},
};
static struct mmp_param_gate_clk apbc_gate_clks[] = {
{PXA1928_CLK_TWSI0, "twsi0_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_TWSI0 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_TWSI1, "twsi1_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_TWSI1 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_TWSI2, "twsi2_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_TWSI2 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_TWSI3, "twsi3_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_TWSI3 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_TWSI4, "twsi4_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_TWSI4 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_TWSI5, "twsi5_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_TWSI5 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_GPIO * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, PXA1928_CLK_KPC * 4, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},
{PXA1928_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, PXA1928_CLK_RTC * 4, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},
{PXA1928_CLK_PWM0, "pwm0_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_PWM0 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_PWM1, "pwm1_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_PWM1 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_PWM2, "pwm2_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_PWM2 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
{PXA1928_CLK_PWM3, "pwm3_clk", "vctcxo", CLK_SET_RATE_PARENT, PXA1928_CLK_PWM3 * 4, 0x3, 0x3, 0x0, 0, &reset_lock},
/* The gate clocks has mux parent. */
{PXA1928_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, PXA1928_CLK_UART0 * 4, 0x3, 0x3, 0x0, 0, &uart0_lock},
{PXA1928_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, PXA1928_CLK_UART1 * 4, 0x3, 0x3, 0x0, 0, &uart1_lock},
{PXA1928_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, PXA1928_CLK_UART2 * 4, 0x3, 0x3, 0x0, 0, &uart2_lock},
{PXA1928_CLK_UART3, "uart3_clk", "uart3_mux", CLK_SET_RATE_PARENT, PXA1928_CLK_UART3 * 4, 0x3, 0x3, 0x0, 0, &uart3_lock},
{PXA1928_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, PXA1928_CLK_SSP0 * 4, 0x3, 0x3, 0x0, 0, &ssp0_lock},
{PXA1928_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, PXA1928_CLK_SSP1 * 4, 0x3, 0x3, 0x0, 0, &ssp1_lock},
};
static void pxa1928_apb_periph_clk_init(struct pxa1928_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(sdh0_lock);
static DEFINE_SPINLOCK(sdh1_lock);
static DEFINE_SPINLOCK(sdh2_lock);
static DEFINE_SPINLOCK(sdh3_lock);
static DEFINE_SPINLOCK(sdh4_lock);
static const char *sdh_parent_names[] = {"pll1_624", "pll5p", "pll5", "pll1_416"};
static DEFINE_SPINLOCK(usb_lock);
static struct mmp_param_mux_clk apmu_mux_clks[] = {
{0, "sdh_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, PXA1928_CLK_SDH0 * 4, 8, 2, 0, &sdh0_lock},
};
static struct mmp_param_div_clk apmu_div_clks[] = {
{0, "sdh_div", "sdh_mux", 0, PXA1928_CLK_SDH0 * 4, 10, 4, CLK_DIVIDER_ONE_BASED, &sdh0_lock},
};
static struct mmp_param_gate_clk apmu_gate_clks[] = {
{PXA1928_CLK_USB, "usb_clk", "usb_pll", 0, PXA1928_CLK_USB * 4, 0x9, 0x9, 0x0, 0, &usb_lock},
{PXA1928_CLK_HSIC, "hsic_clk", "usb_pll", 0, PXA1928_CLK_HSIC * 4, 0x9, 0x9, 0x0, 0, &usb_lock},
/* The gate clocks has mux parent. */
{PXA1928_CLK_SDH0, "sdh0_clk", "sdh_div", CLK_SET_RATE_PARENT, PXA1928_CLK_SDH0 * 4, 0x1b, 0x1b, 0x0, 0, &sdh0_lock},
{PXA1928_CLK_SDH1, "sdh1_clk", "sdh_div", CLK_SET_RATE_PARENT, PXA1928_CLK_SDH1 * 4, 0x1b, 0x1b, 0x0, 0, &sdh1_lock},
{PXA1928_CLK_SDH2, "sdh2_clk", "sdh_div", CLK_SET_RATE_PARENT, PXA1928_CLK_SDH2 * 4, 0x1b, 0x1b, 0x0, 0, &sdh2_lock},
{PXA1928_CLK_SDH3, "sdh3_clk", "sdh_div", CLK_SET_RATE_PARENT, PXA1928_CLK_SDH3 * 4, 0x1b, 0x1b, 0x0, 0, &sdh3_lock},
{PXA1928_CLK_SDH4, "sdh4_clk", "sdh_div", CLK_SET_RATE_PARENT, PXA1928_CLK_SDH4 * 4, 0x1b, 0x1b, 0x0, 0, &sdh4_lock},
};
static void pxa1928_axi_periph_clk_init(struct pxa1928_clk_unit *pxa_unit)
{
struct mmp_clk_unit *unit = &pxa_unit->unit;
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 pxa1928_clk_reset_init(struct device_node *np,
struct pxa1928_clk_unit *pxa_unit)
{
struct mmp_clk_reset_cell *cells;
int i, base, nr_resets;
nr_resets = ARRAY_SIZE(apbc_gate_clks);
cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL);
if (!cells)
return;
base = 0;
for (i = 0; i < nr_resets; i++) {
cells[base + i].clk_id = apbc_gate_clks[i].id;
cells[base + i].reg =
pxa_unit->apbc_base + apbc_gate_clks[i].offset;
cells[base + i].flags = 0;
cells[base + i].lock = apbc_gate_clks[i].lock;
cells[base + i].bits = 0x4;
}
mmp_clk_reset_register(np, cells, nr_resets);
}
static void __init pxa1928_mpmu_clk_init(struct device_node *np)
{
struct pxa1928_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");
kfree(pxa_unit);
return;
}
pxa1928_pll_init(pxa_unit);
}
CLK_OF_DECLARE(pxa1928_mpmu_clk, "marvell,pxa1928-mpmu", pxa1928_mpmu_clk_init);
static void __init pxa1928_apmu_clk_init(struct device_node *np)
{
struct pxa1928_clk_unit *pxa_unit;
pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);
if (!pxa_unit)
return;
pxa_unit->apmu_base = of_iomap(np, 0);
if (!pxa_unit->apmu_base) {
pr_err("failed to map apmu registers\n");
kfree(pxa_unit);
return;
}
mmp_clk_init(np, &pxa_unit->unit, PXA1928_APMU_NR_CLKS);
pxa1928_axi_periph_clk_init(pxa_unit);
}
CLK_OF_DECLARE(pxa1928_apmu_clk, "marvell,pxa1928-apmu", pxa1928_apmu_clk_init);
static void __init pxa1928_apbc_clk_init(struct device_node *np)
{
struct pxa1928_clk_unit *pxa_unit;
pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);
if (!pxa_unit)
return;
pxa_unit->apbc_base = of_iomap(np, 0);
if (!pxa_unit->apbc_base) {
pr_err("failed to map apbc registers\n");
kfree(pxa_unit);
return;
}
mmp_clk_init(np, &pxa_unit->unit, PXA1928_APBC_NR_CLKS);
pxa1928_apb_periph_clk_init(pxa_unit);
pxa1928_clk_reset_init(np, pxa_unit);
}
CLK_OF_DECLARE(pxa1928_apbc_clk, "marvell,pxa1928-apbc", pxa1928_apbc_clk_init);
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