diff options
| -rw-r--r-- | arch/arm/mach-imx/speed-imx31.c | 12 | ||||
| -rw-r--r-- | arch/arm/mach-imx/speed-imx35.c | 31 |
2 files changed, 43 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/speed-imx31.c b/arch/arm/mach-imx/speed-imx31.c index 630c648dbf..70b1330d96 100644 --- a/arch/arm/mach-imx/speed-imx31.c +++ b/arch/arm/mach-imx/speed-imx31.c @@ -41,6 +41,18 @@ ulong imx_get_mcu_main_clk(void) return imx_get_mpl_dpdgck_clk(); } +/** + * Calculate the current pixel clock speed (aka HSP or IPU) + * @return 0 on failure or current frequency in Hz + */ +ulong imx_get_lcdclk(void) +{ + ulong hsp_podf = (readl(IMX_CCM_BASE + CCM_PDR0) >> 11) & 0x03; + ulong base_clk = imx_get_mcu_main_clk(); + + return base_clk / (hsp_podf + 1); +} + ulong imx_get_perclk1(void) { u32 freq = imx_get_mcu_main_clk(); diff --git a/arch/arm/mach-imx/speed-imx35.c b/arch/arm/mach-imx/speed-imx35.c index 4c8420ad24..1721079a6a 100644 --- a/arch/arm/mach-imx/speed-imx35.c +++ b/arch/arm/mach-imx/speed-imx35.c @@ -118,6 +118,37 @@ unsigned long imx_get_gptclk(void) return imx_get_ipgclk(); } +/** + * Calculate the current pixel clock speed (aka HSP or IPU) + * @return 0 on failure or current frequency in Hz + */ +unsigned long imx_get_lcdclk(void) +{ + unsigned long hsp_podf = (readl(IMX_CCM_BASE + CCM_PDR0) >> 20) & 0x03; + unsigned long base_clk = imx_get_armclk(); + + if (base_clk > 400 * 1000 * 1000) { + switch(hsp_podf) { + case 0: + return base_clk >> 2; + case 1: + return base_clk >> 3; + case 2: + return base_clk / 3; + } + } else { + switch(hsp_podf) { + case 0: + case 2: + return base_clk / 3; + case 1: + return base_clk / 6; + } + } + + return 0; +} + unsigned long imx_get_uartclk(void) { unsigned long pdr3 = readl(IMX_CCM_BASE + CCM_PDR3); |