ARM: S5P64X0: Update Clock for S5P6440 and S5P6450

This patch updates regarding clock files for supporting S5P6440 and
S5P6450 with one kernel image. The mach-s5p64x0/clock.c is for common
of them and there are specific clock files for each SoCs.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 626 insertions, 0 deletions

diff --git a/arch/arm/mach-s5p64x0/clock-s5p6440.c b/arch/arm/mach-s5p64x0/clock-s5p6440.c
new file mode 100644
index 0000000..f93dcd8
--- /dev/null
+++ b/arch/arm/mach-s5p64x0/clock-s5p6440.c
@@ -0,0 +1,626 @@
+/* linux/arch/arm/mach-s5p64x0/clock-s5p6440.c
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * S5P6440 - 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/errno.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/sysdev.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <mach/map.h>
+#include <mach/regs-clock.h>
+#include <mach/s5p64x0-clock.h>
+
+#include <plat/cpu-freq.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/s5p6440.h>
+
+static u32 epll_div[][5] = {
+	{ 36000000,	0,	48, 1, 4 },
+	{ 48000000,	0,	32, 1, 3 },
+	{ 60000000,	0,	40, 1, 3 },
+	{ 72000000,	0,	48, 1, 3 },
+	{ 84000000,	0,	28, 1, 2 },
+	{ 96000000,	0,	32, 1, 2 },
+	{ 32768000,	45264,	43, 1, 4 },
+	{ 45158000,	6903,	30, 1, 3 },
+	{ 49152000,	50332,	32, 1, 3 },
+	{ 67738000,	10398,	45, 1, 3 },
+	{ 73728000,	9961,	49, 1, 3 }
+};
+
+static int s5p6440_epll_set_rate(struct clk *clk, unsigned long rate)
+{
+	unsigned int epll_con, epll_con_k;
+	unsigned int i;
+
+	if (clk->rate == rate)	/* Return if nothing changed */
+		return 0;
+
+	epll_con = __raw_readl(S5P64X0_EPLL_CON);
+	epll_con_k = __raw_readl(S5P64X0_EPLL_CON_K);
+
+	epll_con_k &= ~(PLL90XX_KDIV_MASK);
+	epll_con &= ~(PLL90XX_MDIV_MASK | PLL90XX_PDIV_MASK | PLL90XX_SDIV_MASK);
+
+	for (i = 0; i < ARRAY_SIZE(epll_div); i++) {
+		 if (epll_div[i][0] == rate) {
+			epll_con_k |= (epll_div[i][1] << PLL90XX_KDIV_SHIFT);
+			epll_con |= (epll_div[i][2] << PLL90XX_MDIV_SHIFT) |
+				    (epll_div[i][3] << PLL90XX_PDIV_SHIFT) |
+				    (epll_div[i][4] << PLL90XX_SDIV_SHIFT);
+			break;
+		}
+	}
+
+	if (i == ARRAY_SIZE(epll_div)) {
+		printk(KERN_ERR "%s: Invalid Clock EPLL Frequency\n", __func__);
+		return -EINVAL;
+	}
+
+	__raw_writel(epll_con, S5P64X0_EPLL_CON);
+	__raw_writel(epll_con_k, S5P64X0_EPLL_CON_K);
+
+	clk->rate = rate;
+
+	return 0;
+}
+
+static struct clk_ops s5p6440_epll_ops = {
+	.get_rate = s5p64x0_epll_get_rate,
+	.set_rate = s5p6440_epll_set_rate,
+};
+
+static struct clksrc_clk clk_hclk = {
+	.clk	= {
+		.name		= "clk_hclk",
+		.id		= -1,
+		.parent		= &clk_armclk.clk,
+	},
+	.reg_div	= { .reg = S5P64X0_CLK_DIV0, .shift = 8, .size = 4 },
+};
+
+static struct clksrc_clk clk_pclk = {
+	.clk	= {
+		.name		= "clk_pclk",
+		.id		= -1,
+		.parent		= &clk_hclk.clk,
+	},
+	.reg_div	= { .reg = S5P64X0_CLK_DIV0, .shift = 12, .size = 4 },
+};
+static struct clksrc_clk clk_hclk_low = {
+	.clk	= {
+		.name		= "clk_hclk_low",
+		.id		= -1,
+	},
+	.sources	= &clkset_hclk_low,
+	.reg_src	= { .reg = S5P64X0_SYS_OTHERS, .shift = 6, .size = 1 },
+	.reg_div	= { .reg = S5P64X0_CLK_DIV3, .shift = 8, .size = 4 },
+};
+
+static struct clksrc_clk clk_pclk_low = {
+	.clk	= {
+		.name		= "clk_pclk_low",
+		.id		= -1,
+		.parent		= &clk_hclk_low.clk,
+	},
+	.reg_div	= { .reg = S5P64X0_CLK_DIV3, .shift = 12, .size = 4 },
+};
+
+/*
+ * The following clocks will be disabled during clock initialization. It is
+ * recommended to keep the following clocks disabled until the driver requests
+ * for enabling the clock.
+ */
+static struct clk init_clocks_disable[] = {
+	{
+		.name		= "nand",
+		.id		= -1,
+		.parent		= &clk_hclk.clk,
+		.enable		= s5p64x0_mem_ctrl,
+		.ctrlbit	= (1 << 2),
+	}, {
+		.name		= "post",
+		.id		= -1,
+		.parent		= &clk_hclk_low.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 5)
+	}, {
+		.name		= "2d",
+		.id		= -1,
+		.parent		= &clk_hclk.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 8),
+	}, {
+		.name		= "hsmmc",
+		.id		= 0,
+		.parent		= &clk_hclk_low.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 17),
+	}, {
+		.name		= "hsmmc",
+		.id		= 1,
+		.parent		= &clk_hclk_low.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 18),
+	}, {
+		.name		= "hsmmc",
+		.id		= 2,
+		.parent		= &clk_hclk_low.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 19),
+	}, {
+		.name		= "otg",
+		.id		= -1,
+		.parent		= &clk_hclk_low.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 20)
+	}, {
+		.name		= "irom",
+		.id		= -1,
+		.parent		= &clk_hclk.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 25),
+	}, {
+		.name		= "lcd",
+		.id		= -1,
+		.parent		= &clk_hclk_low.clk,
+		.enable		= s5p64x0_hclk1_ctrl,
+		.ctrlbit	= (1 << 1),
+	}, {
+		.name		= "hclk_fimgvg",
+		.id		= -1,
+		.parent		= &clk_hclk.clk,
+		.enable		= s5p64x0_hclk1_ctrl,
+		.ctrlbit	= (1 << 2),
+	}, {
+		.name		= "tsi",
+		.id		= -1,
+		.parent		= &clk_hclk_low.clk,
+		.enable		= s5p64x0_hclk1_ctrl,
+		.ctrlbit	= (1 << 0),
+	}, {
+		.name		= "watchdog",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 5),
+	}, {
+		.name		= "rtc",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 6),
+	}, {
+		.name		= "timers",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 7),
+	}, {
+		.name		= "pcm",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 8),
+	}, {
+		.name		= "adc",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 12),
+	}, {
+		.name		= "i2c",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 17),
+	}, {
+		.name		= "spi",
+		.id		= 0,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 21),
+	}, {
+		.name		= "spi",
+		.id		= 1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 22),
+	}, {
+		.name		= "gps",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 25),
+	}, {
+		.name		= "i2s_v40",
+		.id		= 0,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 26),
+	}, {
+		.name		= "dsim",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 28),
+	}, {
+		.name		= "etm",
+		.id		= -1,
+		.parent		= &clk_pclk.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 29),
+	}, {
+		.name		= "dmc0",
+		.id		= -1,
+		.parent		= &clk_pclk.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 30),
+	}, {
+		.name		= "pclk_fimgvg",
+		.id		= -1,
+		.parent		= &clk_pclk.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 31),
+	}, {
+		.name		= "sclk_spi_48",
+		.id		= 0,
+		.parent		= &clk_48m,
+		.enable		= s5p64x0_sclk_ctrl,
+		.ctrlbit	= (1 << 22),
+	}, {
+		.name		= "sclk_spi_48",
+		.id		= 1,
+		.parent		= &clk_48m,
+		.enable		= s5p64x0_sclk_ctrl,
+		.ctrlbit	= (1 << 23),
+	}, {
+		.name		= "mmc_48m",
+		.id		= 0,
+		.parent		= &clk_48m,
+		.enable		= s5p64x0_sclk_ctrl,
+		.ctrlbit	= (1 << 27),
+	}, {
+		.name		= "mmc_48m",
+		.id		= 1,
+		.parent		= &clk_48m,
+		.enable		= s5p64x0_sclk_ctrl,
+		.ctrlbit	= (1 << 28),
+	}, {
+		.name		= "mmc_48m",
+		.id		= 2,
+		.parent		= &clk_48m,
+		.enable		= s5p64x0_sclk_ctrl,
+		.ctrlbit	= (1 << 29),
+	},
+};
+
+/*
+ * The following clocks will be enabled during clock initialization.
+ */
+static struct clk init_clocks[] = {
+	{
+		.name		= "intc",
+		.id		= -1,
+		.parent		= &clk_hclk.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 1),
+	}, {
+		.name		= "mem",
+		.id		= -1,
+		.parent		= &clk_hclk.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 21),
+	}, {
+		.name		= "dma",
+		.id		= -1,
+		.parent		= &clk_hclk_low.clk,
+		.enable		= s5p64x0_hclk0_ctrl,
+		.ctrlbit	= (1 << 12),
+	}, {
+		.name		= "uart",
+		.id		= 0,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 1),
+	}, {
+		.name		= "uart",
+		.id		= 1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 2),
+	}, {
+		.name		= "uart",
+		.id		= 2,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 3),
+	}, {
+		.name		= "uart",
+		.id		= 3,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 4),
+	}, {
+		.name		= "gpio",
+		.id		= -1,
+		.parent		= &clk_pclk_low.clk,
+		.enable		= s5p64x0_pclk_ctrl,
+		.ctrlbit	= (1 << 18),
+	},
+};
+
+static struct clk clk_iis_cd_v40 = {
+	.name		= "iis_cdclk_v40",
+	.id		= -1,
+};
+
+static struct clk clk_pcm_cd = {
+	.name		= "pcm_cdclk",
+	.id		= -1,
+};
+
+static struct clk *clkset_group1_list[] = {
+	&clk_mout_epll.clk,
+	&clk_dout_mpll.clk,
+	&clk_fin_epll,
+};
+
+static struct clksrc_sources clkset_group1 = {
+	.sources	= clkset_group1_list,
+	.nr_sources	= ARRAY_SIZE(clkset_group1_list),
+};
+
+static struct clk *clkset_uart_list[] = {
+	&clk_mout_epll.clk,
+	&clk_dout_mpll.clk,
+};
+
+static struct clksrc_sources clkset_uart = {
+	.sources	= clkset_uart_list,
+	.nr_sources	= ARRAY_SIZE(clkset_uart_list),
+};
+
+static struct clk *clkset_audio_list[] = {
+	&clk_mout_epll.clk,
+	&clk_dout_mpll.clk,
+	&clk_fin_epll,
+	&clk_iis_cd_v40,
+	&clk_pcm_cd,
+};
+
+static struct clksrc_sources clkset_audio = {
+	.sources	= clkset_audio_list,
+	.nr_sources	= ARRAY_SIZE(clkset_audio_list),
+};
+
+static struct clksrc_clk clksrcs[] = {
+	{
+		.clk	= {
+			.name		= "mmc_bus",
+			.id		= 0,
+			.ctrlbit	= (1 << 24),
+			.enable		= s5p64x0_sclk_ctrl,
+		},
+		.sources = &clkset_group1,
+		.reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 18, .size = 2 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 0, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "mmc_bus",
+			.id		= 1,
+			.ctrlbit	= (1 << 25),
+			.enable		= s5p64x0_sclk_ctrl,
+		},
+		.sources = &clkset_group1,
+		.reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 20, .size = 2 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 4, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "mmc_bus",
+			.id		= 2,
+			.ctrlbit	= (1 << 26),
+			.enable		= s5p64x0_sclk_ctrl,
+		},
+		.sources = &clkset_group1,
+		.reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 22, .size = 2 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 8, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "uclk1",
+			.id		= -1,
+			.ctrlbit	= (1 << 5),
+			.enable		= s5p64x0_sclk_ctrl,
+		},
+		.sources = &clkset_uart,
+		.reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 13, .size = 1 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 16, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "sclk_spi",
+			.id		= 0,
+			.ctrlbit	= (1 << 20),
+			.enable		= s5p64x0_sclk_ctrl,
+		},
+		.sources = &clkset_group1,
+		.reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 14, .size = 2 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 0, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "sclk_spi",
+			.id		= 1,
+			.ctrlbit	= (1 << 21),
+			.enable		= s5p64x0_sclk_ctrl,
+		},
+		.sources = &clkset_group1,
+		.reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 16, .size = 2 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 4, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "sclk_post",
+			.id		= -1,
+			.ctrlbit	= (1 << 10),
+			.enable		= s5p64x0_sclk_ctrl,
+		},
+		.sources = &clkset_group1,
+		.reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 26, .size = 2 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 12, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "sclk_dispcon",
+			.id		= -1,
+			.ctrlbit	= (1 << 1),
+			.enable		= s5p64x0_sclk1_ctrl,
+		},
+		.sources = &clkset_group1,
+		.reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 4, .size = 2 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 0, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "sclk_fimgvg",
+			.id		= -1,
+			.ctrlbit	= (1 << 2),
+			.enable		= s5p64x0_sclk1_ctrl,
+		},
+		.sources = &clkset_group1,
+		.reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 8, .size = 2 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 4, .size = 4 },
+	}, {
+		.clk	= {
+			.name		= "sclk_audio2",
+			.id		= -1,
+			.ctrlbit	= (1 << 11),
+			.enable		= s5p64x0_sclk_ctrl,
+		},
+		.sources = &clkset_audio,
+		.reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 0, .size = 3 },
+		.reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 24, .size = 4 },
+	},
+};
+
+/* Clock initialization code */
+static struct clksrc_clk *sysclks[] = {
+	&clk_mout_apll,
+	&clk_mout_epll,
+	&clk_mout_mpll,
+	&clk_dout_mpll,
+	&clk_armclk,
+	&clk_hclk,
+	&clk_pclk,
+	&clk_hclk_low,
+	&clk_pclk_low,
+};
+
+void __init_or_cpufreq s5p6440_setup_clocks(void)
+{
+	struct clk *xtal_clk;
+
+	unsigned long xtal;
+	unsigned long fclk;
+	unsigned long hclk;
+	unsigned long hclk_low;
+	unsigned long pclk;
+	unsigned long pclk_low;
+
+	unsigned long apll;
+	unsigned long mpll;
+	unsigned long epll;
+	unsigned int ptr;
+
+	/* Set S5P6440 functions for clk_fout_epll */
+
+	clk_fout_epll.enable = s5p64x0_epll_enable;
+	clk_fout_epll.ops = &s5p6440_epll_ops;
+
+	clk_48m.enable = s5p64x0_clk48m_ctrl;
+
+	xtal_clk = clk_get(NULL, "ext_xtal");
+	BUG_ON(IS_ERR(xtal_clk));
+
+	xtal = clk_get_rate(xtal_clk);
+	clk_put(xtal_clk);
+
+	apll = s5p_get_pll45xx(xtal, __raw_readl(S5P64X0_APLL_CON), pll_4502);
+	mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P64X0_MPLL_CON), pll_4502);
+	epll = s5p_get_pll90xx(xtal, __raw_readl(S5P64X0_EPLL_CON),
+				__raw_readl(S5P64X0_EPLL_CON_K));
+
+	clk_fout_apll.rate = apll;
+	clk_fout_mpll.rate = mpll;
+	clk_fout_epll.rate = epll;
+
+	printk(KERN_INFO "S5P6440: PLL settings, A=%ld.%ldMHz, M=%ld.%ldMHz," \
+			" E=%ld.%ldMHz\n",
+			print_mhz(apll), print_mhz(mpll), print_mhz(epll));
+
+	fclk = clk_get_rate(&clk_armclk.clk);
+	hclk = clk_get_rate(&clk_hclk.clk);
+	pclk = clk_get_rate(&clk_pclk.clk);
+	hclk_low = clk_get_rate(&clk_hclk_low.clk);
+	pclk_low = clk_get_rate(&clk_pclk_low.clk);
+
+	printk(KERN_INFO "S5P6440: HCLK=%ld.%ldMHz, HCLK_LOW=%ld.%ldMHz," \
+			" PCLK=%ld.%ldMHz, PCLK_LOW=%ld.%ldMHz\n",
+			print_mhz(hclk), print_mhz(hclk_low),
+			print_mhz(pclk), print_mhz(pclk_low));
+
+	clk_f.rate = fclk;
+	clk_h.rate = hclk;
+	clk_p.rate = pclk;
+
+	for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
+		s3c_set_clksrc(&clksrcs[ptr], true);
+}
+
+static struct clk *clks[] __initdata = {
+	&clk_ext,
+	&clk_iis_cd_v40,
+	&clk_pcm_cd,
+};
+
+void __init s5p6440_register_clocks(void)
+{
+	struct clk *clkp;
+	int ret;
+	int ptr;
+
+	s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
+
+	for (ptr = 0; ptr < ARRAY_SIZE(sysclks); ptr++)
+		s3c_register_clksrc(sysclks[ptr], 1);
+
+	s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
+	s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
+
+	clkp = init_clocks_disable;
+	for (ptr = 0; ptr < ARRAY_SIZE(init_clocks_disable); ptr++, clkp++) {
+
+		ret = s3c24xx_register_clock(clkp);
+		if (ret < 0) {
+			printk(KERN_ERR "Failed to register clock %s (%d)\n",
+			       clkp->name, ret);
+		}
+		(clkp->enable)(clkp, 0);
+	}
+
+	s3c_pwmclk_init();
+}