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-rw-r--r--arch/arm/plat-samsung/s5p-clock.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/s5p-clock.c b/arch/arm/plat-samsung/s5p-clock.c
new file mode 100644
index 0000000..48a1599
--- /dev/null
+++ b/arch/arm/plat-samsung/s5p-clock.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright 2009 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P - Common 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/device.h>
+#include <linux/io.h>
+#include <asm/div64.h>
+
+#include <mach/regs-clock.h>
+
+#include <plat/clock.h>
+#include <plat/clock-clksrc.h>
+#include <plat/s5p-clock.h>
+
+/* fin_apll, fin_mpll and fin_epll are all the same clock, which we call
+ * clk_ext_xtal_mux.
+*/
+struct clk clk_ext_xtal_mux = {
+ .name = "ext_xtal",
+ .id = -1,
+};
+
+struct clk clk_xusbxti = {
+ .name = "xusbxti",
+ .id = -1,
+ .rate = 24000000,
+};
+
+struct clk s5p_clk_27m = {
+ .name = "clk_27m",
+ .id = -1,
+ .rate = 27000000,
+};
+
+/* 48MHz USB Phy clock output */
+struct clk clk_48m = {
+ .name = "clk_48m",
+ .id = -1,
+ .rate = 48000000,
+};
+
+/* APLL clock output
+ * No need .ctrlbit, this is always on
+*/
+struct clk clk_fout_apll = {
+ .name = "fout_apll",
+ .id = -1,
+};
+
+/* BPLL clock output */
+
+struct clk clk_fout_bpll = {
+ .name = "fout_bpll",
+ .id = -1,
+};
+
+struct clk clk_fout_bpll_div2 = {
+ .name = "fout_bpll_div2",
+ .id = -1,
+};
+
+/* CPLL clock output */
+
+struct clk clk_fout_cpll = {
+ .name = "fout_cpll",
+ .id = -1,
+};
+
+/* MPLL clock output
+ * No need .ctrlbit, this is always on
+*/
+struct clk clk_fout_mpll = {
+ .name = "fout_mpll",
+ .id = -1,
+};
+
+struct clk clk_fout_mpll_div2 = {
+ .name = "fout_mpll_div2",
+ .id = -1,
+};
+
+/* EPLL clock output */
+struct clk clk_fout_epll = {
+ .name = "fout_epll",
+ .id = -1,
+ .ctrlbit = (1 << 31),
+};
+
+/* DPLL clock output */
+struct clk clk_fout_dpll = {
+ .name = "fout_dpll",
+ .id = -1,
+ .ctrlbit = (1 << 31),
+};
+
+/* VPLL clock output */
+struct clk clk_fout_vpll = {
+ .name = "fout_vpll",
+ .id = -1,
+ .ctrlbit = (1 << 31),
+};
+
+/* Possible clock sources for APLL Mux */
+static struct clk *clk_src_apll_list[] = {
+ [0] = &clk_fin_apll,
+ [1] = &clk_fout_apll,
+};
+
+struct clksrc_sources clk_src_apll = {
+ .sources = clk_src_apll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_apll_list),
+};
+
+/* Possible clock sources for BPLL Mux */
+static struct clk *clk_src_bpll_list[] = {
+ [0] = &clk_fin_bpll,
+ [1] = &clk_fout_bpll,
+};
+
+struct clksrc_sources clk_src_bpll = {
+ .sources = clk_src_bpll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_bpll_list),
+};
+
+static struct clk *clk_src_bpll_fout_list[] = {
+ [0] = &clk_fout_bpll_div2,
+ [1] = &clk_fout_bpll,
+};
+
+struct clksrc_sources clk_src_bpll_fout = {
+ .sources = clk_src_bpll_fout_list,
+ .nr_sources = ARRAY_SIZE(clk_src_bpll_fout_list),
+};
+
+/* Possible clock sources for CPLL Mux */
+static struct clk *clk_src_cpll_list[] = {
+ [0] = &clk_fin_cpll,
+ [1] = &clk_fout_cpll,
+};
+
+struct clksrc_sources clk_src_cpll = {
+ .sources = clk_src_cpll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_cpll_list),
+};
+
+/* Possible clock sources for MPLL Mux */
+static struct clk *clk_src_mpll_list[] = {
+ [0] = &clk_fin_mpll,
+ [1] = &clk_fout_mpll,
+};
+
+struct clksrc_sources clk_src_mpll = {
+ .sources = clk_src_mpll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_mpll_list),
+};
+
+static struct clk *clk_src_mpll_fout_list[] = {
+ [0] = &clk_fout_mpll_div2,
+ [1] = &clk_fout_mpll,
+};
+
+struct clksrc_sources clk_src_mpll_fout = {
+ .sources = clk_src_mpll_fout_list,
+ .nr_sources = ARRAY_SIZE(clk_src_mpll_fout_list),
+};
+
+/* Possible clock sources for EPLL Mux */
+static struct clk *clk_src_epll_list[] = {
+ [0] = &clk_fin_epll,
+ [1] = &clk_fout_epll,
+};
+
+struct clksrc_sources clk_src_epll = {
+ .sources = clk_src_epll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_epll_list),
+};
+
+/* Possible clock sources for DPLL Mux */
+static struct clk *clk_src_dpll_list[] = {
+ [0] = &clk_fin_dpll,
+ [1] = &clk_fout_dpll,
+};
+
+struct clksrc_sources clk_src_dpll = {
+ .sources = clk_src_dpll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_dpll_list),
+};
+
+struct clk clk_vpll = {
+ .name = "vpll",
+ .id = -1,
+};
+
+int s5p_gatectrl(void __iomem *reg, struct clk *clk, int enable)
+{
+ unsigned int ctrlbit = clk->ctrlbit;
+ u32 con;
+
+ con = __raw_readl(reg);
+ con = enable ? (con | ctrlbit) : (con & ~ctrlbit);
+ __raw_writel(con, reg);
+ return 0;
+}
+
+int s5p_epll_enable(struct clk *clk, int enable)
+{
+ unsigned int ctrlbit = clk->ctrlbit;
+ unsigned int epll_con = __raw_readl(S5P_EPLL_CON) & ~ctrlbit;
+
+ if (enable)
+ __raw_writel(epll_con | ctrlbit, S5P_EPLL_CON);
+ else
+ __raw_writel(epll_con, S5P_EPLL_CON);
+
+ return 0;
+}
+
+unsigned long s5p_epll_get_rate(struct clk *clk)
+{
+ return clk->rate;
+}
+
+int s5p_spdif_set_rate(struct clk *clk, unsigned long rate)
+{
+ struct clk *pclk;
+ int ret;
+
+ pclk = clk_get_parent(clk);
+ if (IS_ERR(pclk))
+ return -EINVAL;
+
+ ret = pclk->ops->set_rate(pclk, rate);
+ clk_put(pclk);
+
+ return ret;
+}
+
+unsigned long s5p_spdif_get_rate(struct clk *clk)
+{
+ struct clk *pclk;
+ int rate;
+
+ pclk = clk_get_parent(clk);
+ if (IS_ERR(pclk))
+ return -EINVAL;
+
+ rate = pclk->ops->get_rate(pclk);
+ clk_put(pclk);
+
+ return rate;
+}
+
+struct clk_ops s5p_sclk_spdif_ops = {
+ .set_rate = s5p_spdif_set_rate,
+ .get_rate = s5p_spdif_get_rate,
+};
+
+static struct clk *s5p_clks[] __initdata = {
+ &clk_ext_xtal_mux,
+ &clk_48m,
+ &s5p_clk_27m,
+ &clk_fout_apll,
+ &clk_fout_mpll,
+ &clk_fout_epll,
+ &clk_fout_dpll,
+ &clk_fout_vpll,
+ &clk_vpll,
+ &clk_xusbxti,
+};
+
+void __init s5p_register_clocks(unsigned long xtal_freq)
+{
+ int ret;
+
+ clk_ext_xtal_mux.rate = xtal_freq;
+
+ ret = s3c24xx_register_clocks(s5p_clks, ARRAY_SIZE(s5p_clks));
+ if (ret > 0)
+ printk(KERN_ERR "Failed to register s5p clocks\n");
+}