1 files changed, 86 insertions, 0 deletions

diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c
index 5a2fdf3b84b9..1029a03c618e 100644
--- a/sound/soc/sh/fsi.c
+++ b/sound/soc/sh/fsi.c
@@ -153,6 +153,13 @@ struct fsi_priv {
         int clk_master:1;
 
         long rate;
+
+        /* for suspend/resume */
+        u32 saved_do_fmt;
+        u32 saved_di_fmt;
+        u32 saved_ckg1;
+        u32 saved_ckg2;
+        u32 saved_out_sel;
 };
 
 struct fsi_core {
@@ -173,6 +180,13 @@ struct fsi_master {
         struct fsi_core *core;
         struct sh_fsi_platform_info *info;
         spinlock_t lock;
+
+        /* for suspend/resume */
+        u32 saved_a_mclk;
+        u32 saved_b_mclk;
+        u32 saved_iemsk;
+        u32 saved_imsk;
+        u32 saved_clk_rst;
 };
 
 /*
@@ -1277,6 +1291,76 @@ static int fsi_remove(struct platform_device *pdev)
         return 0;
 }
 
+static void __fsi_suspend(struct fsi_priv *fsi,
+                          struct device *dev,
+                          set_rate_func set_rate)
+{
+        fsi->saved_do_fmt       = fsi_reg_read(fsi, DO_FMT);
+        fsi->saved_di_fmt       = fsi_reg_read(fsi, DI_FMT);
+        fsi->saved_ckg1         = fsi_reg_read(fsi, CKG1);
+        fsi->saved_ckg2         = fsi_reg_read(fsi, CKG2);
+        fsi->saved_out_sel      = fsi_reg_read(fsi, OUT_SEL);
+
+        if (fsi_is_clk_master(fsi))
+                set_rate(dev, fsi_is_port_a(fsi), fsi->rate, 0);
+}
+
+static void __fsi_resume(struct fsi_priv *fsi,
+                         struct device *dev,
+                         set_rate_func set_rate)
+{
+        fsi_reg_write(fsi, DO_FMT,      fsi->saved_do_fmt);
+        fsi_reg_write(fsi, DI_FMT,      fsi->saved_di_fmt);
+        fsi_reg_write(fsi, CKG1,        fsi->saved_ckg1);
+        fsi_reg_write(fsi, CKG2,        fsi->saved_ckg2);
+        fsi_reg_write(fsi, OUT_SEL,     fsi->saved_out_sel);
+
+        if (fsi_is_clk_master(fsi))
+                set_rate(dev, fsi_is_port_a(fsi), fsi->rate, 1);
+}
+
+static int fsi_suspend(struct device *dev)
+{
+        struct fsi_master *master = dev_get_drvdata(dev);
+        set_rate_func set_rate = fsi_get_info_set_rate(master);
+
+        pm_runtime_get_sync(dev);
+
+        __fsi_suspend(&master->fsia, dev, set_rate);
+        __fsi_suspend(&master->fsib, dev, set_rate);
+
+        master->saved_a_mclk    = fsi_core_read(master, a_mclk);
+        master->saved_b_mclk    = fsi_core_read(master, b_mclk);
+        master->saved_iemsk     = fsi_core_read(master, iemsk);
+        master->saved_imsk      = fsi_core_read(master, imsk);
+        master->saved_clk_rst   = fsi_master_read(master, CLK_RST);
+
+        pm_runtime_put_sync(dev);
+
+        return 0;
+}
+
+static int fsi_resume(struct device *dev)
+{
+        struct fsi_master *master = dev_get_drvdata(dev);
+        set_rate_func set_rate = fsi_get_info_set_rate(master);
+
+        pm_runtime_get_sync(dev);
+
+        __fsi_resume(&master->fsia, dev, set_rate);
+        __fsi_resume(&master->fsib, dev, set_rate);
+
+        fsi_core_mask_set(master, a_mclk, 0xffff, master->saved_a_mclk);
+        fsi_core_mask_set(master, b_mclk, 0xffff, master->saved_b_mclk);
+        fsi_core_mask_set(master, iemsk, 0xffff, master->saved_iemsk);
+        fsi_core_mask_set(master, imsk, 0xffff, master->saved_imsk);
+        fsi_master_mask_set(master, CLK_RST, 0xffff, master->saved_clk_rst);
+
+        pm_runtime_put_sync(dev);
+
+        return 0;
+}
+
 static int fsi_runtime_nop(struct device *dev)
 {
         /* Runtime PM callback shared between ->runtime_suspend()
@@ -1290,6 +1374,8 @@ static int fsi_runtime_nop(struct device *dev)
 }
 
 static struct dev_pm_ops fsi_pm_ops = {
+        .suspend                = fsi_suspend,
+        .resume                 = fsi_resume,
         .runtime_suspend        = fsi_runtime_nop,
         .runtime_resume         = fsi_runtime_nop,
 };