diff options
Diffstat (limited to 'drivers/clk/renesas/clk-mstp.c')
| -rw-r--r-- | drivers/clk/renesas/clk-mstp.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/clk/renesas/clk-mstp.c b/drivers/clk/renesas/clk-mstp.c index b533f99550e1..4067216bf31f 100644 --- a/drivers/clk/renesas/clk-mstp.c +++ b/drivers/clk/renesas/clk-mstp.c @@ -91,6 +91,12 @@ static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable) value |= bitmask; cpg_mstp_write(group, value, group->smstpcr); + if (!group->mstpsr) { + /* dummy read to ensure write has completed */ + cpg_mstp_read(group, group->smstpcr); + barrier_data(group->smstpcr); + } + spin_unlock_irqrestore(&group->lock, flags); if (!enable || !group->mstpsr) @@ -141,9 +147,9 @@ static const struct clk_ops cpg_mstp_clock_ops = { .is_enabled = cpg_mstp_clock_is_enabled, }; -static struct clk * __init -cpg_mstp_clock_register(const char *name, const char *parent_name, - unsigned int index, struct mstp_clock_group *group) +static struct clk * __init cpg_mstp_clock_register(const char *name, + const char *parent_name, unsigned int index, + struct mstp_clock_group *group) { struct clk_init_data init; struct mstp_clock *clock; @@ -158,6 +164,11 @@ cpg_mstp_clock_register(const char *name, const char *parent_name, init.name = name; init.ops = &cpg_mstp_clock_ops; init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT; + /* INTC-SYS is the module clock of the GIC, and must not be disabled */ + if (!strcmp(name, "intc-sys")) { + pr_debug("MSTP %s setting CLK_IS_CRITICAL\n", name); + init.flags |= CLK_IS_CRITICAL; + } init.parent_names = &parent_name; init.num_parents = 1; |