diff options
| author | Alex Frid <afrid@nvidia.com> | 2012-01-12 17:39:04 -0800 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2012-01-30 11:46:12 -0800 |
| commit | e43a17627f3e7151170082660040d9679c5fa9b1 (patch) | |
| tree | ba43d9fc4ef55c82e8ddc64dc324d2f916c5df3b /arch/arm/mach-tegra/devices.c | |
| parent | 53d80238951d9989905acc45d18eeb1110ac8c84 (diff) | |
ARM: tegra: clock: Auto-detect PLLP rate in uart init
Tegra3 platform may boot with one of the predefined fixed PLLP
(peripheral PLL) output rates: 216MHz, 408MHz, or 204MHz. This
commit implements auto-detection of PLLP rate, and debug uart
configuration during kernel uart initialization.
Bug 928260
Change-Id: I3fac4c462f28ac3dc1c72c0cc0f8f87fa0a809c4
Reviewed-on: http://git-master/r/75849
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Signed-off-by: Alex Frid <afrid@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-on: http://git-master/r/77294
Reviewed-by: Automatic_Commit_Validation_User
Diffstat (limited to 'arch/arm/mach-tegra/devices.c')
| -rw-r--r-- | arch/arm/mach-tegra/devices.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/devices.c b/arch/arm/mach-tegra/devices.c index 549db73f1627..39bc04bd2e39 100644 --- a/arch/arm/mach-tegra/devices.c +++ b/arch/arm/mach-tegra/devices.c @@ -27,6 +27,7 @@ #include <linux/platform_data/tegra_usb.h> #include <linux/tegra_avp.h> #include <linux/nvhost.h> +#include <linux/clk.h> #include <asm/pmu.h> #include <mach/irqs.h> #include <mach/iomap.h> @@ -1733,3 +1734,20 @@ struct platform_device tegra_nvmap_device = { .name = "tegra-nvmap", .id = -1, }; + +void tegra_init_debug_uart_rate(void) +{ + unsigned int uartclk; + struct clk *debug_uart_parent = clk_get_sys(NULL, "pll_p"); + + BUG_ON(IS_ERR(debug_uart_parent)); + uartclk = clk_get_rate(debug_uart_parent); + + debug_uarta_platform_data[0].uartclk = uartclk; + debug_uartb_platform_data[0].uartclk = uartclk; + debug_uartc_platform_data[0].uartclk = uartclk; + debug_uartd_platform_data[0].uartclk = uartclk; +#if !defined(CONFIG_ARCH_TEGRA_2x_SOC) + debug_uarte_platform_data[0].uartclk = uartclk; +#endif +} |