[PATCHv2 3/5] clk: samsung: exynos5410: Add suspend/resume handling
From: Humberto Silva Naves
Date: Thu Jul 31 2014 - 07:22:38 EST
This patch implements all the necessary code that handles register
saving and restoring during a suspend/resume cycle. To make this
possible, the local variable reg_base from the function
exynos5410_clk_init was changed to global. In addition, new
clock register definitions were added for the majority of the relevant
clocks inside the SoC.
Signed-off-by: Humberto Silva Naves <hsnaves@xxxxxxxxx>
---
drivers/clk/samsung/clk-exynos5410.c | 231 +++++++++++++++++++++++++++++++++-
1 file changed, 228 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/samsung/clk-exynos5410.c b/drivers/clk/samsung/clk-exynos5410.c
index 92c56b7..a9c261c 100644
--- a/drivers/clk/samsung/clk-exynos5410.c
+++ b/drivers/clk/samsung/clk-exynos5410.c
@@ -16,6 +16,7 @@
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/syscore_ops.h>
#include "clk.h"
@@ -24,38 +25,134 @@
#define MPLL_LOCK 0x4000
#define MPLL_CON0 0x4100
#define CPLL_LOCK 0x10020
+#define DPLL_LOCK 0x10030
+#define EPLL_LOCK 0x10040
+#define VPLL_LOCK 0x10050
+#define IPLL_LOCK 0x10060
#define CPLL_CON0 0x10120
+#define CPLL_CON1 0x10124
+#define DPLL_CON0 0x10128
+#define DPLL_CON1 0x1012C
+#define EPLL_CON0 0x10130
+#define EPLL_CON1 0x10134
+#define EPLL_CON2 0x10138
+#define VPLL_CON0 0x10140
+#define VPLL_CON1 0x10144
+#define VPLL_CON2 0x10148
+#define IPLL_CON0 0x10150
+#define IPLL_CON1 0x10154
#define BPLL_LOCK 0x20010
#define BPLL_CON0 0x20110
#define KPLL_LOCK 0x28000
#define KPLL_CON0 0x28100
#define SRC_CPU 0x200
+#define SRC_CPERI0 0x4200
#define SRC_CPERI1 0x4204
#define SRC_TOP0 0x10210
#define SRC_TOP1 0x10214
#define SRC_TOP2 0x10218
+#define SRC_TOP3 0x1021C
+#define SRC_GSCL 0x10220
+#define SRC_DISP0_0 0x10224
+#define SRC_DISP0_1 0x10228
+#define SRC_DISP1_0 0x1022C
+#define SRC_DISP1_1 0x10230
+#define SRC_MAU 0x10240
#define SRC_FSYS 0x10244
#define SRC_PERIC0 0x10250
+#define SRC_PERIC1 0x10254
#define SRC_CDREX 0x20200
#define SRC_KFC 0x28200
+#define SRC_MASK_TOP 0x10310
+#define SRC_MASK_GSCL 0x10320
+#define SRC_MASK_DISP0_0 0x10324
+#define SRC_MASK_DISP0_1 0x10328
+#define SRC_MASK_DISP1_0 0x1032C
+#define SRC_MASK_DISP1_1 0x10330
+#define SRC_MASK_MAU 0x10334
#define SRC_MASK_FSYS 0x10340
+#define SRC_MASK_GEN 0x10344
#define SRC_MASK_PERIC0 0x10350
+#define SRC_MASK_PERIC1 0x10354
#define DIV_CPU0 0x500
+#define DIV_CPU1 0x504
+#define DIV_CPERI0 0x4500
+#define DIV_CPERI1 0x4504
+#define DIV_G2D 0x8500
+#define DIV_ISP0 0xC300
+#define DIV_ISP1 0xC304
+#define DIV_ISP2 0xC308
#define DIV_TOP0 0x10510
#define DIV_TOP1 0x10514
-#define DIV_FSYS1 0x1054c
+#define DIV_TOP2 0x10518
+#define DIV_TOP3 0x1051C
+#define DIV_GSCL 0x10520
+#define DIV_DISP0_0 0x10524
+#define DIV_DISP0_1 0x10528
+#define DIV_DISP1_0 0x1052C
+#define DIV_DISP1_1 0x10530
+#define DIV_GEN 0x1053C
+#define DIV_MAU 0x10544
+#define DIV_FSYS0 0x10548
+#define DIV_FSYS1 0x1054C
#define DIV_FSYS2 0x10550
+#define DIV_FSYS3 0x10554
#define DIV_PERIC0 0x10558
+#define DIV_PERIC1 0x1055C
+#define DIV_PERIC2 0x10560
+#define DIV_PERIC3 0x10564
+#define DIV_PERIC4 0x10568
+#define DIV_PERIC5 0x1056C
+#define DIV2_RATIO0 0x10590
+#define DIV2_RATIO1 0x10594
+#define DIV_CDREX 0x20500
+#define DIV_CDREX2 0x20504
#define DIV_KFC0 0x28500
+#define GATE_BUS_CPU 0x700
+#define GATE_BUS_GSCL0 0x10710
+#define GATE_BUS_GSCL1 0x10720
+#define GATE_BUS_DISP0 0x10724
+#define GATE_BUS_DISP1 0x10728
+#define GATE_BUS_MFC 0x10734
+#define GATE_BUS_G3D 0x10738
+#define GATE_BUS_GEN 0x1073C
#define GATE_BUS_FSYS0 0x10740
-
+#define GATE_BUS_FSYS1 0x10744
+#define GATE_BUS_CDREX 0x20700
+
+#define GATE_IP_CORE 0x4900
+#define GATE_IP_G2D 0x8800
+#define GATE_IP_ISP0 0xC800
+#define GATE_IP_ISP1 0xC804
+#define GATE_IP_GSCL0 0x10910
+#define GATE_IP_GSCL1 0x10920
+#define GATE_IP_DISP0 0x10924
+#define GATE_IP_DISP1 0x10928
+#define GATE_IP_MFC 0x1092C
+#define GATE_IP_G3D 0x10930
+#define GATE_IP_GEN 0x10934
#define GATE_IP_FSYS 0x10944
#define GATE_IP_PERIC 0x10950
#define GATE_IP_PERIS 0x10960
+#define GATE_IP_CDREX 0x20900
+
+#define GATE_TOP_SCLK_GSCL 0x10820
+#define GATE_TOP_SCLK_DISP0 0x10824
+#define GATE_TOP_SCLK_DISP1 0x10828
+#define GATE_TOP_SCLK_GEN 0x1082C
+#define GATE_TOP_SCLK_MAU 0x1083C
+#define GATE_TOP_SCLK_FSYS 0x10840
+#define GATE_TOP_SCLK_PERIC 0x10850
+
+#define GATE_SCLK_CPU 0x800
+#define SCLK_SRC_ISP 0x10270
+#define SCLK_DIV_ISP 0x10580
+#define SCLK_DIV_ISP1 0x10584
+
/* list of PLLs */
enum exynos5410_plls {
@@ -64,6 +161,134 @@ enum exynos5410_plls {
nr_plls /* number of PLLs */
};
+static void __iomem *reg_base;
+
+#ifdef CONFIG_PM_SLEEP
+static struct samsung_clk_reg_dump *exynos5410_save;
+
+/*
+ * list of controller registers to be saved and restored during a
+ * suspend/resume cycle.
+ */
+static unsigned long exynos5410_clk_regs[] __initdata = {
+ SRC_CDREX,
+ SRC_CPERI0,
+ SRC_CPERI1,
+ SRC_CPU,
+ SRC_DISP0_0,
+ SRC_DISP0_1,
+ SRC_DISP1_0,
+ SRC_DISP1_1,
+ SRC_FSYS,
+ SRC_GSCL,
+ SRC_KFC,
+ SRC_MAU,
+ SRC_PERIC0,
+ SRC_PERIC1,
+ SRC_TOP0,
+ SRC_TOP1,
+ SRC_TOP2,
+ SRC_TOP3,
+
+ DIV_CDREX,
+ DIV_CDREX2,
+ DIV_CPU0,
+ DIV_CPERI1,
+ DIV_DISP0_0,
+ DIV_DISP0_1,
+ DIV_DISP1_0,
+ DIV_DISP1_1,
+ DIV_FSYS0,
+ DIV_FSYS1,
+ DIV_FSYS2,
+ DIV_GEN,
+ DIV_GSCL,
+ DIV_G2D,
+ DIV_KFC0,
+ DIV_MAU,
+ DIV_PERIC0,
+ DIV_PERIC1,
+ DIV_PERIC2,
+ DIV_PERIC3,
+ DIV_PERIC4,
+ DIV_PERIC5,
+ DIV_TOP0,
+ DIV_TOP1,
+ DIV_TOP2,
+ DIV_TOP3,
+
+ GATE_BUS_DISP1,
+ GATE_BUS_FSYS0,
+
+ GATE_IP_CDREX,
+ GATE_IP_CORE,
+ GATE_IP_DISP0,
+ GATE_IP_DISP1,
+ GATE_IP_FSYS,
+ GATE_IP_GEN,
+ GATE_IP_GSCL0,
+ GATE_IP_GSCL1,
+ GATE_IP_G2D,
+ GATE_IP_G3D,
+ GATE_IP_MFC,
+ GATE_IP_PERIC,
+ GATE_IP_PERIS,
+
+ GATE_TOP_SCLK_DISP1,
+ GATE_TOP_SCLK_FSYS,
+ GATE_TOP_SCLK_GSCL,
+ GATE_TOP_SCLK_MAU,
+ GATE_TOP_SCLK_PERIC,
+
+ GATE_BUS_DISP1,
+ GATE_BUS_FSYS0,
+
+ GATE_SCLK_CPU,
+
+ SRC_MASK_DISP0_0,
+ SRC_MASK_DISP1_0,
+ SRC_MASK_FSYS,
+ SRC_MASK_MAU,
+ SRC_MASK_PERIC0,
+ SRC_MASK_PERIC1,
+};
+
+static int exynos5410_clk_suspend(void)
+{
+ samsung_clk_save(reg_base, exynos5410_save,
+ ARRAY_SIZE(exynos5410_clk_regs));
+
+ return 0;
+}
+
+static void exynos5410_clk_resume(void)
+{
+ samsung_clk_restore(reg_base, exynos5410_save,
+ ARRAY_SIZE(exynos5410_clk_regs));
+}
+
+static struct syscore_ops exynos5410_clk_syscore_ops = {
+ .suspend = exynos5410_clk_suspend,
+ .resume = exynos5410_clk_resume,
+};
+
+static void exynos5410_clk_sleep_init(void)
+{
+ exynos5410_save = samsung_clk_alloc_reg_dump(exynos5410_clk_regs,
+ ARRAY_SIZE(exynos5410_clk_regs));
+ if (!exynos5410_save) {
+ pr_warn("%s: failed to allocate sleep save data, no sleep support!\n",
+ __func__);
+ return;
+ }
+
+ register_syscore_ops(&exynos5410_clk_syscore_ops);
+}
+#else
+static void exynos5410_clk_sleep_init(void) {}
+#endif
+
+
/* list of all parent clocks */
PNAME(apll_p) = { "fin_pll", "fout_apll", };
PNAME(bpll_p) = { "fin_pll", "fout_bpll", };
@@ -190,7 +415,6 @@ static struct samsung_pll_clock exynos5410_plls[nr_plls] __initdata = {
static void __init exynos5410_clk_init(struct device_node *np)
{
struct samsung_clk_provider *ctx;
- void __iomem *reg_base;
if (np) {
reg_base = of_iomap(np, 0);
@@ -214,6 +438,7 @@ static void __init exynos5410_clk_init(struct device_node *np)
samsung_clk_register_gate(ctx, exynos5410_gate_clks,
ARRAY_SIZE(exynos5410_gate_clks));
+ exynos5410_clk_sleep_init();
samsung_clk_of_add_provider(np, ctx);
pr_debug("Exynos5410: clock setup completed.\n");
--
1.7.10.4
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