-----Original Message----- From: york sun Sent: Tuesday, March 08, 2016 3:07 AM To: Yangbo Lu; u-boot@lists.denx.de Subject: Re: [PATCH] armv8/fsl-lsch2: fix sdhc clock frequency value
On 02/15/2016 07:03 PM, Yangbo Lu wrote:
The eSDHC could select to use platform clock or peripheral clock to generate SD clock. The default selection is platform clock. So, fix the clock frequency value that's calculated for eSDHC.
Signed-off-by: Yangbo Lu yangbo.lu@nxp.com
arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c index 6f6a588..453a93d 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c @@ -106,9 +106,13 @@ void get_sys_info(struct sys_info *sys_info) #define HWA_CGA_M2_CLK_SEL 0x00000007 #define HWA_CGA_M2_CLK_SHIFT 0 #ifdef CONFIG_FSL_ESDHC +#ifdef CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK rcw_tmp = in_be32(&gur->rcwsr[15]); rcw_tmp = (rcw_tmp & HWA_CGA_M2_CLK_SEL) >> HWA_CGA_M2_CLK_SHIFT; sys_info->freq_sdhc = freq_c_pll[1] / rcw_tmp; +#else
- sys_info->freq_sdhc = sys_info->freq_systembus; #endif
#endif
#if defined(CONFIG_FSL_IFC)
Yango,
The change looks OK. But you didn't define CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK anywhere. Do you have another patch using this macro? So far, this macro is only used for T1040QDS and T208xQDS.
York
[Lu Yangbo-B47093] Hi York. You are right. Although we don't use this macro presently, we will use it to support SD UHS mode in the future. Now we could treat it as a bug fix.
Thanks.