summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/clk/tegra/clk.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/drivers/clk/tegra/clk.c')
-rw-r--r--kernel/drivers/clk/tegra/clk.c40
1 files changed, 32 insertions, 8 deletions
diff --git a/kernel/drivers/clk/tegra/clk.c b/kernel/drivers/clk/tegra/clk.c
index 41cd87c67..2a3a4fe80 100644
--- a/kernel/drivers/clk/tegra/clk.c
+++ b/kernel/drivers/clk/tegra/clk.c
@@ -14,6 +14,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <linux/clkdev.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/of.h>
@@ -49,7 +50,6 @@
#define RST_DEVICES_L 0x004
#define RST_DEVICES_H 0x008
#define RST_DEVICES_U 0x00C
-#define RST_DFLL_DVCO 0x2F4
#define RST_DEVICES_V 0x358
#define RST_DEVICES_W 0x35C
#define RST_DEVICES_X 0x28C
@@ -79,6 +79,11 @@ static struct clk **clks;
static int clk_num;
static struct clk_onecell_data clk_data;
+/* Handlers for SoC-specific reset lines */
+static int (*special_reset_assert)(unsigned long);
+static int (*special_reset_deassert)(unsigned long);
+static unsigned int num_special_reset;
+
static struct tegra_clk_periph_regs periph_regs[] = {
[0] = {
.enb_reg = CLK_OUT_ENB_L,
@@ -152,19 +157,29 @@ static int tegra_clk_rst_assert(struct reset_controller_dev *rcdev,
*/
tegra_read_chipid();
- writel_relaxed(BIT(id % 32),
- clk_base + periph_regs[id / 32].rst_set_reg);
+ if (id < periph_banks * 32) {
+ writel_relaxed(BIT(id % 32),
+ clk_base + periph_regs[id / 32].rst_set_reg);
+ return 0;
+ } else if (id < periph_banks * 32 + num_special_reset) {
+ return special_reset_assert(id);
+ }
- return 0;
+ return -EINVAL;
}
static int tegra_clk_rst_deassert(struct reset_controller_dev *rcdev,
unsigned long id)
{
- writel_relaxed(BIT(id % 32),
- clk_base + periph_regs[id / 32].rst_clr_reg);
+ if (id < periph_banks * 32) {
+ writel_relaxed(BIT(id % 32),
+ clk_base + periph_regs[id / 32].rst_clr_reg);
+ return 0;
+ } else if (id < periph_banks * 32 + num_special_reset) {
+ return special_reset_deassert(id);
+ }
- return 0;
+ return -EINVAL;
}
struct tegra_clk_periph_regs *get_reg_bank(int clkid)
@@ -286,10 +301,19 @@ void __init tegra_add_of_provider(struct device_node *np)
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
rst_ctlr.of_node = np;
- rst_ctlr.nr_resets = periph_banks * 32;
+ rst_ctlr.nr_resets = periph_banks * 32 + num_special_reset;
reset_controller_register(&rst_ctlr);
}
+void __init tegra_init_special_resets(unsigned int num,
+ int (*assert)(unsigned long),
+ int (*deassert)(unsigned long))
+{
+ num_special_reset = num;
+ special_reset_assert = assert;
+ special_reset_deassert = deassert;
+}
+
void __init tegra_register_devclks(struct tegra_devclk *dev_clks, int num)
{
int i;