diff options
Diffstat (limited to 'arch/arm/mach-s5p6442/clock.c')
| -rw-r--r-- | arch/arm/mach-s5p6442/clock.c | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/arch/arm/mach-s5p6442/clock.c b/arch/arm/mach-s5p6442/clock.c new file mode 100644 index 000000000000..3aadbf42c112 --- /dev/null +++ b/arch/arm/mach-s5p6442/clock.c @@ -0,0 +1,396 @@ +/* linux/arch/arm/mach-s5p6442/clock.c + * + * Copyright (c) 2010 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * S5P6442 - Clock support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/err.h> +#include <linux/clk.h> +#include <linux/io.h> + +#include <mach/map.h> + +#include <plat/cpu-freq.h> +#include <mach/regs-clock.h> +#include <plat/clock.h> +#include <plat/cpu.h> +#include <plat/pll.h> +#include <plat/s5p-clock.h> +#include <plat/clock-clksrc.h> +#include <plat/s5p6442.h> + +static struct clksrc_clk clk_mout_apll = { + .clk = { + .name = "mout_apll", + .id = -1, + }, + .sources = &clk_src_apll, + .reg_src = { .reg = S5P_CLK_SRC0, .shift = 0, .size = 1 }, +}; + +static struct clksrc_clk clk_mout_mpll = { + .clk = { + .name = "mout_mpll", + .id = -1, + }, + .sources = &clk_src_mpll, + .reg_src = { .reg = S5P_CLK_SRC0, .shift = 4, .size = 1 }, +}; + +static struct clksrc_clk clk_mout_epll = { + .clk = { + .name = "mout_epll", + .id = -1, + }, + .sources = &clk_src_epll, + .reg_src = { .reg = S5P_CLK_SRC0, .shift = 8, .size = 1 }, +}; + +/* Possible clock sources for ARM Mux */ +static struct clk *clk_src_arm_list[] = { + [1] = &clk_mout_apll.clk, + [2] = &clk_mout_mpll.clk, +}; + +static struct clksrc_sources clk_src_arm = { + .sources = clk_src_arm_list, + .nr_sources = ARRAY_SIZE(clk_src_arm_list), +}; + +static struct clksrc_clk clk_mout_arm = { + .clk = { + .name = "mout_arm", + .id = -1, + }, + .sources = &clk_src_arm, + .reg_src = { .reg = S5P_CLK_MUX_STAT0, .shift = 16, .size = 3 }, +}; + +static struct clk clk_dout_a2m = { + .name = "dout_a2m", + .id = -1, + .parent = &clk_mout_apll.clk, +}; + +/* Possible clock sources for D0 Mux */ +static struct clk *clk_src_d0_list[] = { + [1] = &clk_mout_mpll.clk, + [2] = &clk_dout_a2m, +}; + +static struct clksrc_sources clk_src_d0 = { + .sources = clk_src_d0_list, + .nr_sources = ARRAY_SIZE(clk_src_d0_list), +}; + +static struct clksrc_clk clk_mout_d0 = { + .clk = { + .name = "mout_d0", + .id = -1, + }, + .sources = &clk_src_d0, + .reg_src = { .reg = S5P_CLK_MUX_STAT0, .shift = 20, .size = 3 }, +}; + +static struct clk clk_dout_apll = { + .name = "dout_apll", + .id = -1, + .parent = &clk_mout_arm.clk, +}; + +/* Possible clock sources for D0SYNC Mux */ +static struct clk *clk_src_d0sync_list[] = { + [1] = &clk_mout_d0.clk, + [2] = &clk_dout_apll, +}; + +static struct clksrc_sources clk_src_d0sync = { + .sources = clk_src_d0sync_list, + .nr_sources = ARRAY_SIZE(clk_src_d0sync_list), +}; + +static struct clksrc_clk clk_mout_d0sync = { + .clk = { + .name = "mout_d0sync", + .id = -1, + }, + .sources = &clk_src_d0sync, + .reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 28, .size = 3 }, +}; + +/* Possible clock sources for D1 Mux */ +static struct clk *clk_src_d1_list[] = { + [1] = &clk_mout_mpll.clk, + [2] = &clk_dout_a2m, +}; + +static struct clksrc_sources clk_src_d1 = { + .sources = clk_src_d1_list, + .nr_sources = ARRAY_SIZE(clk_src_d1_list), +}; + +static struct clksrc_clk clk_mout_d1 = { + .clk = { + .name = "mout_d1", + .id = -1, + }, + .sources = &clk_src_d1, + .reg_src = { .reg = S5P_CLK_MUX_STAT0, .shift = 24, .size = 3 }, +}; + +/* Possible clock sources for D1SYNC Mux */ +static struct clk *clk_src_d1sync_list[] = { + [1] = &clk_mout_d1.clk, + [2] = &clk_dout_apll, +}; + +static struct clksrc_sources clk_src_d1sync = { + .sources = clk_src_d1sync_list, + .nr_sources = ARRAY_SIZE(clk_src_d1sync_list), +}; + +static struct clksrc_clk clk_mout_d1sync = { + .clk = { + .name = "mout_d1sync", + .id = -1, + }, + .sources = &clk_src_d1sync, + .reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 24, .size = 3 }, +}; + +static struct clk clk_hclkd0 = { + .name = "hclkd0", + .id = -1, + .parent = &clk_mout_d0sync.clk, +}; + +static struct clk clk_hclkd1 = { + .name = "hclkd1", + .id = -1, + .parent = &clk_mout_d1sync.clk, +}; + +static struct clk clk_pclkd0 = { + .name = "pclkd0", + .id = -1, + .parent = &clk_hclkd0, +}; + +static struct clk clk_pclkd1 = { + .name = "pclkd1", + .id = -1, + .parent = &clk_hclkd1, +}; + +int s5p6442_clk_ip3_ctrl(struct clk *clk, int enable) +{ + return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable); +} + +static struct clksrc_clk clksrcs[] = { + { + .clk = { + .name = "dout_a2m", + .id = -1, + .parent = &clk_mout_apll.clk, + }, + .sources = &clk_src_apll, + .reg_src = { .reg = S5P_CLK_SRC0, .shift = 0, .size = 1 }, + .reg_div = { .reg = S5P_CLK_DIV0, .shift = 4, .size = 3 }, + }, { + .clk = { + .name = "dout_apll", + .id = -1, + .parent = &clk_mout_arm.clk, + }, + .sources = &clk_src_arm, + .reg_src = { .reg = S5P_CLK_MUX_STAT0, .shift = 16, .size = 3 }, + .reg_div = { .reg = S5P_CLK_DIV0, .shift = 0, .size = 3 }, + }, { + .clk = { + .name = "hclkd1", + .id = -1, + .parent = &clk_mout_d1sync.clk, + }, + .sources = &clk_src_d1sync, + .reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 24, .size = 3 }, + .reg_div = { .reg = S5P_CLK_DIV0, .shift = 24, .size = 4 }, + }, { + .clk = { + .name = "hclkd0", + .id = -1, + .parent = &clk_mout_d0sync.clk, + }, + .sources = &clk_src_d0sync, + .reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 28, .size = 3 }, + .reg_div = { .reg = S5P_CLK_DIV0, .shift = 16, .size = 4 }, + }, { + .clk = { + .name = "pclkd0", + .id = -1, + .parent = &clk_hclkd0, + }, + .sources = &clk_src_d0sync, + .reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 28, .size = 3 }, + .reg_div = { .reg = S5P_CLK_DIV0, .shift = 20, .size = 3 }, + }, { + .clk = { + .name = "pclkd1", + .id = -1, + .parent = &clk_hclkd1, + }, + .sources = &clk_src_d1sync, + .reg_src = { .reg = S5P_CLK_MUX_STAT1, .shift = 24, .size = 3 }, + .reg_div = { .reg = S5P_CLK_DIV0, .shift = 28, .size = 3 }, + } +}; + +/* Clock initialisation code */ +static struct clksrc_clk *init_parents[] = { + &clk_mout_apll, + &clk_mout_mpll, + &clk_mout_epll, + &clk_mout_arm, + &clk_mout_d0, + &clk_mout_d0sync, + &clk_mout_d1, + &clk_mout_d1sync, +}; + +void __init_or_cpufreq s5p6442_setup_clocks(void) +{ + struct clk *pclkd0_clk; + struct clk *pclkd1_clk; + + unsigned long xtal; + unsigned long arm; + unsigned long hclkd0 = 0; + unsigned long hclkd1 = 0; + unsigned long pclkd0 = 0; + unsigned long pclkd1 = 0; + + unsigned long apll; + unsigned long mpll; + unsigned long epll; + unsigned int ptr; + + printk(KERN_DEBUG "%s: registering clocks\n", __func__); + + xtal = clk_get_rate(&clk_xtal); + + printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal); + + apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4508); + mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502); + epll = s5p_get_pll45xx(xtal, __raw_readl(S5P_EPLL_CON), pll_4500); + + printk(KERN_INFO "S5P6440: PLL settings, A=%ld, M=%ld, E=%ld", + apll, mpll, epll); + + clk_fout_apll.rate = apll; + clk_fout_mpll.rate = mpll; + clk_fout_epll.rate = epll; + + for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++) + s3c_set_clksrc(init_parents[ptr], true); + + for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++) + s3c_set_clksrc(&clksrcs[ptr], true); + + arm = clk_get_rate(&clk_dout_apll); + hclkd0 = clk_get_rate(&clk_hclkd0); + hclkd1 = clk_get_rate(&clk_hclkd1); + + pclkd0_clk = clk_get(NULL, "pclkd0"); + BUG_ON(IS_ERR(pclkd0_clk)); + + pclkd0 = clk_get_rate(pclkd0_clk); + clk_put(pclkd0_clk); + + pclkd1_clk = clk_get(NULL, "pclkd1"); + BUG_ON(IS_ERR(pclkd1_clk)); + + pclkd1 = clk_get_rate(pclkd1_clk); + clk_put(pclkd1_clk); + + printk(KERN_INFO "S5P6442: HCLKD0=%ld, HCLKD1=%ld, PCLKD0=%ld, PCLKD1=%ld\n", + hclkd0, hclkd1, pclkd0, pclkd1); + + /* For backward compatibility */ + clk_f.rate = arm; + clk_h.rate = hclkd1; + clk_p.rate = pclkd1; + + clk_pclkd0.rate = pclkd0; + clk_pclkd1.rate = pclkd1; +} + +static struct clk init_clocks[] = { + { + .name = "systimer", + .id = -1, + .parent = &clk_pclkd1, + .enable = s5p6442_clk_ip3_ctrl, + .ctrlbit = (1<<16), + }, { + .name = "uart", + .id = 0, + .parent = &clk_pclkd1, + .enable = s5p6442_clk_ip3_ctrl, + .ctrlbit = (1<<17), + }, { + .name = "uart", + .id = 1, + .parent = &clk_pclkd1, + .enable = s5p6442_clk_ip3_ctrl, + .ctrlbit = (1<<18), + }, { + .name = "uart", + .id = 2, + .parent = &clk_pclkd1, + .enable = s5p6442_clk_ip3_ctrl, + .ctrlbit = (1<<19), + }, { + .name = "timers", + .id = -1, + .parent = &clk_pclkd1, + .enable = s5p6442_clk_ip3_ctrl, + .ctrlbit = (1<<23), + }, +}; + +static struct clk *clks[] __initdata = { + &clk_ext, + &clk_epll, + &clk_mout_apll.clk, + &clk_mout_mpll.clk, + &clk_mout_epll.clk, + &clk_mout_d0.clk, + &clk_mout_d0sync.clk, + &clk_mout_d1.clk, + &clk_mout_d1sync.clk, + &clk_hclkd0, + &clk_pclkd0, + &clk_hclkd1, + &clk_pclkd1, +}; + +void __init s5p6442_register_clocks(void) +{ + s3c24xx_register_clocks(clks, ARRAY_SIZE(clks)); + + s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs)); + s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks)); + + s3c_pwmclk_init(); +} |
