OpenWrt – Rev 4
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From 3642843a06025ec333d7e92580cf52cb8db2a652 Mon Sep 17 00:00:00 2001
From: Govindraj Raja <Govindraj.Raja@imgtec.com>
Date: Fri, 8 Jan 2016 16:36:07 +0000
Subject: clk: pistachio: Fix wrong SDHost card speed
The SDHost currently clocks the card 4x slower than it
should do, because there is fixed divide by 4 in the
sdhost wrapper that is not present in the clock tree.
To model this add a fixed divide by 4 clock node in
the SDHost clock path.
This will ensure the right clock frequency is selected when
the mmc driver tries to configure frequency on card insert.
Signed-off-by: Govindraj Raja <Govindraj.Raja@imgtec.com>
---
drivers/clk/pistachio/clk-pistachio.c | 3 ++-
include/dt-bindings/clock/pistachio-clk.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/clk/pistachio/clk-pistachio.c
+++ b/drivers/clk/pistachio/clk-pistachio.c
@@ -44,7 +44,7 @@ static struct pistachio_gate pistachio_g
GATE(CLK_AUX_ADC_INTERNAL, "aux_adc_internal", "sys_internal_div",
0x104, 22),
GATE(CLK_AUX_ADC, "aux_adc", "aux_adc_div", 0x104, 23),
- GATE(CLK_SD_HOST, "sd_host", "sd_host_div", 0x104, 24),
+ GATE(CLK_SD_HOST, "sd_host", "sd_host_div4", 0x104, 24),
GATE(CLK_BT, "bt", "bt_div", 0x104, 25),
GATE(CLK_BT_DIV4, "bt_div4", "bt_div4_div", 0x104, 26),
GATE(CLK_BT_DIV8, "bt_div8", "bt_div8_div", 0x104, 27),
@@ -54,6 +54,7 @@ static struct pistachio_gate pistachio_g
static struct pistachio_fixed_factor pistachio_ffs[] __initdata = {
FIXED_FACTOR(CLK_WIFI_DIV4, "wifi_div4", "wifi_pll", 4),
FIXED_FACTOR(CLK_WIFI_DIV8, "wifi_div8", "wifi_pll", 8),
+ FIXED_FACTOR(CLK_SDHOST_DIV4, "sd_host_div4", "sd_host_div", 4),
};
static struct pistachio_div pistachio_divs[] __initdata = {
--- a/include/dt-bindings/clock/pistachio-clk.h
+++ b/include/dt-bindings/clock/pistachio-clk.h
@@ -21,6 +21,7 @@
/* Fixed-factor clocks */
#define CLK_WIFI_DIV4 16
#define CLK_WIFI_DIV8 17
+#define CLK_SDHOST_DIV4 18
/* Gate clocks */
#define CLK_MIPS 32