1 files changed, 178 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c24xx/clock-s3c2416.c b/arch/arm/mach-s3c24xx/clock-s3c2416.c
new file mode 100644
index 000000000000..5e36905eb7fc
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/clock-s3c2416.c
@@ -0,0 +1,178 @@
+/* linux/arch/arm/mach-s3c2416/clock.c
+ *
+ * Copyright (c) 2010 Simtec Electronics
+ * Copyright (c) 2010 Ben Dooks <ben-linux@fluff.org>
+ *
+ * S3C2416 Clock control support
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/clk.h>
+
+#include <plat/s3c2416.h>
+#include <plat/clock.h>
+#include <plat/clock-clksrc.h>
+#include <plat/cpu.h>
+
+#include <plat/cpu-freq.h>
+#include <plat/pll.h>
+
+#include <asm/mach/map.h>
+
+#include <mach/regs-clock.h>
+#include <mach/regs-s3c2443-clock.h>
+
+/* armdiv
+ *
+ * this clock is sourced from msysclk and can have a number of
+ * divider values applied to it to then be fed into armclk.
+ * The real clock definition is done in s3c2443-clock.c,
+ * only the armdiv divisor table must be defined here.
+*/
+
+static unsigned int armdiv[8] = {
+        [0] = 1,
+        [1] = 2,
+        [2] = 3,
+        [3] = 4,
+        [5] = 6,
+        [7] = 8,
+};
+
+static struct clksrc_clk hsspi_eplldiv = {
+        .clk = {
+                .name   = "hsspi-eplldiv",
+                .parent = &clk_esysclk.clk,
+                .ctrlbit = (1 << 14),
+                .enable = s3c2443_clkcon_enable_s,
+        },
+        .reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 24 },
+};
+
+static struct clk *hsspi_sources[] = {
+        [0] = &hsspi_eplldiv.clk,
+        [1] = NULL, /* to fix */
+};
+
+static struct clksrc_clk hsspi_mux = {
+        .clk    = {
+                .name   = "hsspi-if",
+        },
+        .sources = &(struct clksrc_sources) {
+                .sources = hsspi_sources,
+                .nr_sources = ARRAY_SIZE(hsspi_sources),
+        },
+        .reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 18 },
+};
+
+static struct clksrc_clk hsmmc_div[] = {
+        [0] = {
+                .clk = {
+                        .name   = "hsmmc-div",
+                        .devname        = "s3c-sdhci.0",
+                        .parent = &clk_esysclk.clk,
+                },
+                .reg_div = { .reg = S3C2416_CLKDIV2, .size = 2, .shift = 6 },
+        },
+        [1] = {
+                .clk = {
+                        .name   = "hsmmc-div",
+                        .devname        = "s3c-sdhci.1",
+                        .parent = &clk_esysclk.clk,
+                },
+                .reg_div = { .reg = S3C2443_CLKDIV1, .size = 2, .shift = 6 },
+        },
+};
+
+static struct clksrc_clk hsmmc_mux0 = {
+        .clk    = {
+                .name           = "hsmmc-if",
+                .devname        = "s3c-sdhci.0",
+                .ctrlbit        = (1 << 6),
+                .enable         = s3c2443_clkcon_enable_s,
+        },
+        .sources        = &(struct clksrc_sources) {
+                .nr_sources     = 2,
+                .sources        = (struct clk * []) {
+                        [0]     = &hsmmc_div[0].clk,
+                        [1]     = NULL, /* to fix */
+                },
+        },
+        .reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 16 },
+};
+
+static struct clksrc_clk hsmmc_mux1 = {
+        .clk    = {
+                .name           = "hsmmc-if",
+                .devname        = "s3c-sdhci.1",
+                .ctrlbit        = (1 << 12),
+                .enable         = s3c2443_clkcon_enable_s,
+        },
+        .sources        = &(struct clksrc_sources) {
+                .nr_sources     = 2,
+                .sources        = (struct clk * []) {
+                        [0]     = &hsmmc_div[1].clk,
+                        [1]     = NULL, /* to fix */
+                },
+        },
+        .reg_src = { .reg = S3C2443_CLKSRC, .size = 1, .shift = 17 },
+};
+
+static struct clk hsmmc0_clk = {
+        .name           = "hsmmc",
+        .devname        = "s3c-sdhci.0",
+        .parent         = &clk_h,
+        .enable         = s3c2443_clkcon_enable_h,
+        .ctrlbit        = S3C2416_HCLKCON_HSMMC0,
+};
+
+void __init_or_cpufreq s3c2416_setup_clocks(void)
+{
+        s3c2443_common_setup_clocks(s3c2416_get_pll);
+}
+
+
+static struct clksrc_clk *clksrcs[] __initdata = {
+        &hsspi_eplldiv,
+        &hsspi_mux,
+        &hsmmc_div[0],
+        &hsmmc_div[1],
+        &hsmmc_mux0,
+        &hsmmc_mux1,
+};
+
+static struct clk_lookup s3c2416_clk_lookup[] = {
+        CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.0", &hsmmc0_clk),
+        CLKDEV_INIT("s3c-sdhci.0", "mmc_busclk.2", &hsmmc_mux0.clk),
+        CLKDEV_INIT("s3c-sdhci.1", "mmc_busclk.2", &hsmmc_mux1.clk),
+};
+
+void __init s3c2416_init_clocks(int xtal)
+{
+        u32 epllcon = __raw_readl(S3C2443_EPLLCON);
+        u32 epllcon1 = __raw_readl(S3C2443_EPLLCON+4);
+        int ptr;
+
+        /* s3c2416 EPLL compatible with s3c64xx */
+        clk_epll.rate = s3c_get_pll6553x(xtal, epllcon, epllcon1);
+
+        clk_epll.parent = &clk_epllref.clk;
+
+        s3c2443_common_init_clocks(xtal, s3c2416_get_pll,
+                                   armdiv, ARRAY_SIZE(armdiv),
+                                   S3C2416_CLKDIV0_ARMDIV_MASK);
+
+        for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
+                s3c_register_clksrc(clksrcs[ptr], 1);
+
+        s3c24xx_register_clock(&hsmmc0_clk);
+        clkdev_add_table(s3c2416_clk_lookup, ARRAY_SIZE(s3c2416_clk_lookup));
+
+        s3c_pwmclk_init();
+
+}