diff options
| -rw-r--r-- | drivers/clk/Makefile | 1 | ||||
| -rw-r--r-- | drivers/clk/pxa/Makefile | 1 | ||||
| -rw-r--r-- | drivers/clk/pxa/clk-pxa.c | 97 | ||||
| -rw-r--r-- | drivers/clk/pxa/clk-pxa.h | 107 | ||||
| -rw-r--r-- | include/dt-bindings/clock/pxa-clock.h | 77 |
5 files changed, 283 insertions, 0 deletions
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index f537a0b1f798..7891e4edaa07 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_ARCH_MMP) += mmp/ endif obj-$(CONFIG_PLAT_ORION) += mvebu/ obj-$(CONFIG_ARCH_MXS) += mxs/ +obj-$(CONFIG_ARCH_PXA) += pxa/ obj-$(CONFIG_COMMON_CLK_QCOM) += qcom/ obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ obj-$(CONFIG_COMMON_CLK_SAMSUNG) += samsung/ diff --git a/drivers/clk/pxa/Makefile b/drivers/clk/pxa/Makefile new file mode 100644 index 000000000000..cb2bd8ff53da --- /dev/null +++ b/drivers/clk/pxa/Makefile @@ -0,0 +1 @@ +obj-y += clk-pxa.o diff --git a/drivers/clk/pxa/clk-pxa.c b/drivers/clk/pxa/clk-pxa.c new file mode 100644 index 000000000000..ef3c05389c0a --- /dev/null +++ b/drivers/clk/pxa/clk-pxa.c @@ -0,0 +1,97 @@ +/* + * Marvell PXA family clocks + * + * Copyright (C) 2014 Robert Jarzmik + * + * Common clock code for PXA clocks ("CKEN" type clocks + DT) + * + * 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. + * + */ +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clkdev.h> +#include <linux/of.h> + +#include <dt-bindings/clock/pxa-clock.h> +#include "clk-pxa.h" + +DEFINE_SPINLOCK(lock); + +static struct clk *pxa_clocks[CLK_MAX]; +static struct clk_onecell_data onecell_data = { + .clks = pxa_clocks, + .clk_num = CLK_MAX, +}; + +#define to_pxa_clk(_hw) container_of(_hw, struct pxa_clk_cken, hw) + +static unsigned long cken_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct pxa_clk_cken *pclk = to_pxa_clk(hw); + struct clk_fixed_factor *fix; + + if (!pclk->is_in_low_power || pclk->is_in_low_power()) + fix = &pclk->lp; + else + fix = &pclk->hp; + fix->hw.clk = hw->clk; + return clk_fixed_factor_ops.recalc_rate(&fix->hw, parent_rate); +} + +static struct clk_ops cken_rate_ops = { + .recalc_rate = cken_recalc_rate, +}; + +static u8 cken_get_parent(struct clk_hw *hw) +{ + struct pxa_clk_cken *pclk = to_pxa_clk(hw); + + if (!pclk->is_in_low_power) + return 0; + return pclk->is_in_low_power() ? 0 : 1; +} + +static struct clk_ops cken_mux_ops = { + .get_parent = cken_get_parent, + .set_parent = dummy_clk_set_parent, +}; + +void __init clkdev_pxa_register(int ckid, const char *con_id, + const char *dev_id, struct clk *clk) +{ + if (!IS_ERR(clk) && (ckid != CLK_NONE)) + pxa_clocks[ckid] = clk; + if (!IS_ERR(clk)) + clk_register_clkdev(clk, con_id, dev_id); +} + +int __init clk_pxa_cken_init(struct pxa_clk_cken *clks, int nb_clks) +{ + int i; + struct pxa_clk_cken *pclk; + struct clk *clk; + + for (i = 0; i < nb_clks; i++) { + pclk = clks + i; + pclk->gate.lock = &lock; + clk = clk_register_composite(NULL, pclk->name, + pclk->parent_names, 2, + &pclk->hw, &cken_mux_ops, + &pclk->hw, &cken_rate_ops, + &pclk->gate.hw, &clk_gate_ops, + pclk->flags); + clkdev_pxa_register(pclk->ckid, pclk->con_id, pclk->dev_id, + clk); + } + return 0; +} + +static void __init pxa_dt_clocks_init(struct device_node *np) +{ + of_clk_add_provider(np, of_clk_src_onecell_get, &onecell_data); +} +CLK_OF_DECLARE(pxa_clks, "marvell,pxa-clocks", pxa_dt_clocks_init); diff --git a/drivers/clk/pxa/clk-pxa.h b/drivers/clk/pxa/clk-pxa.h new file mode 100644 index 000000000000..5fe219d06b49 --- /dev/null +++ b/drivers/clk/pxa/clk-pxa.h @@ -0,0 +1,107 @@ +/* + * Marvell PXA family clocks + * + * Copyright (C) 2014 Robert Jarzmik + * + * Common clock code for PXA clocks ("CKEN" type clocks + DT) + * + * 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. + * + */ +#ifndef _CLK_PXA_ +#define _CLK_PXA_ + +#define PARENTS(name) \ + static const char *name ## _parents[] __initconst +#define MUX_RO_RATE_RO_OPS(name, clk_name) \ + static struct clk_hw name ## _mux_hw; \ + static struct clk_hw name ## _rate_hw; \ + static struct clk_ops name ## _mux_ops = { \ + .get_parent = name ## _get_parent, \ + .set_parent = dummy_clk_set_parent, \ + }; \ + static struct clk_ops name ## _rate_ops = { \ + .recalc_rate = name ## _get_rate, \ + }; \ + static struct clk *clk_register_ ## name(void) \ + { \ + return clk_register_composite(NULL, clk_name, \ + name ## _parents, \ + ARRAY_SIZE(name ## _parents), \ + &name ## _mux_hw, &name ## _mux_ops, \ + &name ## _rate_hw, &name ## _rate_ops, \ + NULL, NULL, CLK_GET_RATE_NOCACHE); \ + } + +#define RATE_RO_OPS(name, clk_name) \ + static struct clk_hw name ## _rate_hw; \ + static struct clk_ops name ## _rate_ops = { \ + .recalc_rate = name ## _get_rate, \ + }; \ + static struct clk *clk_register_ ## name(void) \ + { \ + return clk_register_composite(NULL, clk_name, \ + name ## _parents, \ + ARRAY_SIZE(name ## _parents), \ + NULL, NULL, \ + &name ## _rate_hw, &name ## _rate_ops, \ + NULL, NULL, CLK_GET_RATE_NOCACHE); \ + } + +/* + * CKEN clock type + * This clock takes it source from 2 possible parents : + * - a low power parent + * - a normal parent + * + * +------------+ +-----------+ + * | Low Power | --- | x mult_lp | + * | Clock | | / div_lp |\ + * +------------+ +-----------+ \+-----+ +-----------+ + * | Mux |---| CKEN gate | + * +------------+ +-----------+ /+-----+ +-----------+ + * | High Power | | x mult_hp |/ + * | Clock | --- | / div_hp | + * +------------+ +-----------+ + */ +struct pxa_clk_cken { + struct clk_hw hw; + int ckid; + const char *name; + const char *dev_id; + const char *con_id; + const char **parent_names; + struct clk_fixed_factor lp; + struct clk_fixed_factor hp; + struct clk_gate gate; + bool (*is_in_low_power)(void); + const unsigned long flags; +}; + +#define PXA_CKEN(_dev_id, _con_id, _name, parents, _mult_lp, _div_lp, \ + _mult_hp, _div_hp, is_lp, _cken_reg, _cken_bit, flag) \ + { .ckid = CLK_ ## _name, .name = #_name, \ + .dev_id = _dev_id, .con_id = _con_id, .parent_names = parents,\ + .lp = { .mult = _mult_lp, .div = _div_lp }, \ + .hp = { .mult = _mult_hp, .div = _div_hp }, \ + .is_in_low_power = is_lp, \ + .gate = { .reg = (void __iomem *)_cken_reg, .bit_idx = _cken_bit }, \ + .flags = flag, \ + } +#define PXA_CKEN_1RATE(dev_id, con_id, name, parents, cken_reg, \ + cken_bit, flag) \ + PXA_CKEN(dev_id, con_id, name, parents, 1, 1, 1, 1, \ + NULL, cken_reg, cken_bit, flag) + +static int dummy_clk_set_parent(struct clk_hw *hw, u8 index) +{ + return 0; +} + +extern void clkdev_pxa_register(int ckid, const char *con_id, + const char *dev_id, struct clk *clk); +extern int clk_pxa_cken_init(struct pxa_clk_cken *clks, int nb_clks); + +#endif diff --git a/include/dt-bindings/clock/pxa-clock.h b/include/dt-bindings/clock/pxa-clock.h new file mode 100644 index 000000000000..e65803b1dc7e --- /dev/null +++ b/include/dt-bindings/clock/pxa-clock.h @@ -0,0 +1,77 @@ +/* + * Inspired by original work from pxa2xx-regs.h by Nicolas Pitre + * Copyright (C) 2014 Robert Jarzmik + * + * 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; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __DT_BINDINGS_CLOCK_PXA2XX_H__ +#define __DT_BINDINGS_CLOCK_PXA2XX_H__ + +#define CLK_NONE 0 +#define CLK_1WIRE 1 +#define CLK_AC97 2 +#define CLK_AC97CONF 3 +#define CLK_ASSP 4 +#define CLK_BOOT 5 +#define CLK_BTUART 6 +#define CLK_CAMERA 7 +#define CLK_CIR 8 +#define CLK_CORE 9 +#define CLK_DMC 10 +#define CLK_FFUART 11 +#define CLK_FICP 12 +#define CLK_GPIO 13 +#define CLK_HSIO2 14 +#define CLK_HWUART 15 +#define CLK_I2C 16 +#define CLK_I2S 17 +#define CLK_IM 18 +#define CLK_INC 19 +#define CLK_ISC 20 +#define CLK_KEYPAD 21 +#define CLK_LCD 22 +#define CLK_MEMC 23 +#define CLK_MEMSTK 24 +#define CLK_MINI_IM 25 +#define CLK_MINI_LCD 26 +#define CLK_MMC 27 +#define CLK_MMC1 28 +#define CLK_MMC2 29 +#define CLK_MMC3 30 +#define CLK_MSL 31 +#define CLK_MSL0 32 +#define CLK_MVED 33 +#define CLK_NAND 34 +#define CLK_NSSP 35 +#define CLK_OSTIMER 36 +#define CLK_PWM0 37 +#define CLK_PWM1 38 +#define CLK_PWM2 39 +#define CLK_PWM3 40 +#define CLK_PWRI2C 41 +#define CLK_PXA300_GCU 42 +#define CLK_PXA320_GCU 43 +#define CLK_SMC 44 +#define CLK_SSP 45 +#define CLK_SSP1 46 +#define CLK_SSP2 47 +#define CLK_SSP3 48 +#define CLK_SSP4 49 +#define CLK_STUART 50 +#define CLK_TOUCH 51 +#define CLK_TPM 52 +#define CLK_UDC 53 +#define CLK_USB 54 +#define CLK_USB2 55 +#define CLK_USBH 56 +#define CLK_USBHOST 57 +#define CLK_USIM 58 +#define CLK_USIM1 59 +#define CLK_USMI0 60 +#define CLK_MAX 61 + +#endif |
