[PATCH 2/2] clk: ti: get register address from device tree

Dario Binacchi
2021-04-02T19:22:12Z

Until now, only the register offset was retrieved from the device tree
to be added, during access, to a common base address for the clocks.
If possible, we try to retrieve the physical address of the register
directly from the device tree.

Signed-off-by: Dario Binacchi <dariobin@libero.it>

---

drivers/clk/ti/clk.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
index 3da33c786d77..938f5a2cb425 100644
--- a/drivers/clk/ti/clk.c
+++ b/drivers/clk/ti/clk.c
@@ -265,9 +265,21 @@ int __init ti_clk_retry_init(struct device_node *node, void *user,
int ti_clk_get_reg_addr(struct device_node *node, int index,
struct clk_omap_reg *reg)
{
+ const __be32 *addrp;
+ u64 size, addr = OF_BAD_ADDR;
+ unsigned int flags;
u32 val;
int i;

+ addrp = of_get_address(node, index, &size, &flags);
+ if (addrp)
+ addr = of_translate_address(node, addrp);
+
+ if (addr != OF_BAD_ADDR) {
+ reg->ptr = ioremap(addr, sizeof(u32));
+ return 0;
+ }
+
for (i = 0; i < CLK_MAX_MEMMAPS; i++) {
if (clocks_node_ptr[i] == node->parent)
break;
@@ -287,7 +299,6 @@ int ti_clk_get_reg_addr(struct device_node *node, int index,

reg->offset = val;
reg->ptr = NULL;
-
return 0;
}

--
2.17.1