diff options
Diffstat (limited to 'recipes-bsp/u-boot/u-boot-v2012.04.01/0003-MX53-add-function-to-set-SATA-clock-to-internal.patch')
| -rw-r--r-- | recipes-bsp/u-boot/u-boot-v2012.04.01/0003-MX53-add-function-to-set-SATA-clock-to-internal.patch | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/recipes-bsp/u-boot/u-boot-v2012.04.01/0003-MX53-add-function-to-set-SATA-clock-to-internal.patch b/recipes-bsp/u-boot/u-boot-v2012.04.01/0003-MX53-add-function-to-set-SATA-clock-to-internal.patch new file mode 100644 index 0000000..2a4eb94 --- /dev/null +++ b/recipes-bsp/u-boot/u-boot-v2012.04.01/0003-MX53-add-function-to-set-SATA-clock-to-internal.patch @@ -0,0 +1,77 @@ +From b22729b27625107061733c718cb49a394fd41a4a Mon Sep 17 00:00:00 2001 +From: Stefano Babic <sbabic@denx.de> +Date: Wed, 22 Feb 2012 00:24:38 +0000 +Subject: [PATCH 03/56] MX53: add function to set SATA clock to internal + +The MX53 SATA interface can use an internal clock (USB PHY1) +instead of an external clock. This is an undocumented feature, but used +on most Freescale's evaluation boards, such as MX53-loco. + +As stated by Freescale's support: + +Fuses (but not pins) may be used to configure SATA clocks. +Particularly the i.MX53 Fuse_Map contains the next information +about configuring SATA clocks : + SATA_ALT_REF_CLK[1:0] (offset 0x180C) + +'00' - 100MHz (External) +'01' - 50MHz (External) +'10' - 120MHz, internal (USB PHY) +'11' - Reserved + +Signed-off-by: Stefano Babic <sbabic@denx.de> +CC: Fabio Estevam <fabio.estevam@freescale.com> +--- + arch/arm/cpu/armv7/mx5/clock.c | 24 ++++++++++++++++++++++++ + arch/arm/include/asm/arch-mx5/clock.h | 1 + + 2 files changed, 25 insertions(+) + +diff --git a/arch/arm/cpu/armv7/mx5/clock.c b/arch/arm/cpu/armv7/mx5/clock.c +index 8f8d01c..d769a4d 100644 +--- a/arch/arm/cpu/armv7/mx5/clock.c ++++ b/arch/arm/cpu/armv7/mx5/clock.c +@@ -399,6 +399,30 @@ u32 imx_get_fecclk(void) + return mxc_get_clock(MXC_IPG_CLK); + } + ++#ifdef CONFIG_MX53 ++/* ++ * The clock for the external interface can be set to use internal clock ++ * if fuse bank 4, row 3, bit 2 is set. ++ * This is an undocumented feature and it was confirmed by Freescale's support: ++ * Fuses (but not pins) may be used to configure SATA clocks. ++ * Particularly the i.MX53 Fuse_Map contains the next information ++ * about configuring SATA clocks : SATA_ALT_REF_CLK[1:0] (offset 0x180C) ++ * '00' - 100MHz (External) ++ * '01' - 50MHz (External) ++ * '10' - 120MHz, internal (USB PHY) ++ * '11' - Reserved ++*/ ++void mxc_set_sata_internal_clock(void) ++{ ++ u32 *tmp_base = ++ (u32 *)(IIM_BASE_ADDR + 0x180c); ++ ++ set_usb_phy1_clk(); ++ ++ writel((readl(tmp_base) & (~0x7)) | 0x4, tmp_base); ++} ++#endif ++ + /* + * Dump some core clockes. + */ +diff --git a/arch/arm/include/asm/arch-mx5/clock.h b/arch/arm/include/asm/arch-mx5/clock.h +index f9f82f3..e822809 100644 +--- a/arch/arm/include/asm/arch-mx5/clock.h ++++ b/arch/arm/include/asm/arch-mx5/clock.h +@@ -45,5 +45,6 @@ void set_usb_phy2_clk(void); + void enable_usb_phy2_clk(unsigned char enable); + void set_usboh3_clk(void); + void enable_usboh3_clk(unsigned char enable); ++void mxc_set_sata_internal_clock(void); + + #endif /* __ASM_ARCH_CLOCK_H */ +-- +1.7.10 + |