diff options
Diffstat (limited to 'kernel/drivers/clk/tegra/clk.c')
| -rw-r--r-- | kernel/drivers/clk/tegra/clk.c | 40 |
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; |