Re: [PATCH 5/6] clk: rockchip: rk3036: fix and add node id for emac clock
From: Caesar Wang
Date: Fri Mar 11 2016 - 07:01:30 EST
Hi Heiko,
The link [0] need a bit changes if we want the emac to be happy work.
-RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 4, 5, DFLAGS),
+RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 9, 5, DFLAGS),
I will need resend the series patches with your change in link[0], OK?
Since the Mr.rebot just notice the build error, I will check and resend
with your emac changing.
å 2016å03æ11æ 19:15, Heiko StÃbner åé:
Hi Caesar,
Am Freitag, 11. MÃrz 2016, 18:55:30 schrieb Caesar Wang:
From: zhengxing <zhengxing@xxxxxxxxxxxxxx>
In the emac driver, we need to refer HCLK_MAC since there are
only 3PLLs (APLL/GPLL/DPLL) on the rk3036, most clocks are under the
GPLL, and it is unable to provide the accurate rate for mac_ref which
need to 50MHz probability, we should let it under the DPLL and are
able to set the freq which integer multiples of 50MHz, so we add these
emac node for reference.
Signed-off-by: Xing Zheng <zhengxing@xxxxxxxxxxxxxx>
Signed-off-by: Caesar Wang <wxt@xxxxxxxxxxxxxx>
I think I mentioned it somewhere before, but I'd like to do this
differently, like in [0].
That should work in a similar way and at least in my tests the reported
clock rate seems to be correct. As I said as well I haven't been able to
make the emac detect a link on my kylin boards, so it would be cool
if you could test if this different approach works in practice as well.
I fetch your branch patches, it doesn't work for me.
c467a5f clk: rockchip: associate SCLK_MAC_PLL and disable reparenting on
rk3036
ae7ed09 clk: rockchip: add clock-id for rk3036 emac pll source clock
f876a7e clk: rockchip: associate the rk3036 HCLK_EMAC clock-id
5093371 clk: rockchip: add node-id for rk3036 emac hclk
f44eeee Revert "clk: rockchip: rk3036: fix and add node id for emac clock"
..
It works if the patch
c467a5f clk: rockchip: associate SCLK_MAC_PLL and disable reparenting on
rk3036 to change as following
--- a/drivers/clk/rockchip/clk-rk3036.c
+++ b/drivers/clk/rockchip/clk-rk3036.c
@@ -348,8 +348,8 @@ static struct rockchip_clk_branch
rk3036_clk_branches[] __initdata = {
RK2928_CLKSEL_CON(16), 0, 2, MFLAGS, 2, 5, DFLAGS,
RK2928_CLKGATE_CON(10), 5, GFLAGS),
- COMPOSITE_NOGATE(0, "mac_pll_src", mux_pll_src_3plls_p, 0,
- RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 9, 5, DFLAGS),
+ COMPOSITE_NOGATE(SCLK_MACPLL, "mac_pll_src",
mux_pll_src_3plls_p, CLK_SET_RATE_NO_REPARENT,
+ RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 9, 5, DFLAGS),
Thanks
Heiko
------ 8< ---------
From e83a8b19dbf95c40d2c908727c342fbc6b167ea1 Mon Sep 17 00:00:00 2001
From: Heiko Stuebner <heiko@xxxxxxxxx>
Date: Fri, 19 Feb 2016 21:31:43 +0100
Subject: [PATCH] clk: rockchip: associate SCLK_MAC_PLL and disable reparenting
on rk3036
The emac needs constant and very specific rate but the possible PLL-sources
are very limited, so we expect the PLL source to be set manually on per
board and don't want it to get changed in an automatic way later.
So add the necessary clock-id and disable reparenting on set_rate calls.
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
---
drivers/clk/rockchip/clk-rk3036.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/rockchip/clk-rk3036.c b/drivers/clk/rockchip/clk-rk3036.c
index 3c742bf..0084c57 100644
--- a/drivers/clk/rockchip/clk-rk3036.c
+++ b/drivers/clk/rockchip/clk-rk3036.c
@@ -348,7 +348,7 @@ static struct rockchip_clk_branch rk3036_clk_branches[] __initdata = {
RK2928_CLKSEL_CON(16), 0, 2, MFLAGS, 2, 5, DFLAGS,
RK2928_CLKGATE_CON(10), 5, GFLAGS),
- COMPOSITE_NOGATE(0, "mac_pll_src", mux_pll_src_3plls_p, 0,
+ COMPOSITE_NOGATE(SCLK_MACPLL, "mac_pll_src", mux_pll_src_3plls_p, CLK_SET_RATE_NO_REPARENT,
RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 4, 5, DFLAGS),
-RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 4, 5, DFLAGS),
+RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 9, 5, DFLAGS),
MUX(SCLK_MACREF, "mac_clk_ref", mux_mac_p, CLK_SET_RATE_PARENT,
RK2928_CLKSEL_CON(21), 3, 1, MFLAGS),
------ 8< ---------
[0] https://github.com/mmind/linux-rockchip/commit/e83a8b19dbf95c40d2c908727c342fbc6b167ea1
---
drivers/clk/rockchip/clk-rk3036.c | 9 ++++++---
include/dt-bindings/clock/rk3036-cru.h | 2 ++
2 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/rockchip/clk-rk3036.c
b/drivers/clk/rockchip/clk-rk3036.c index 0703c8f..27c35fa 100644
--- a/drivers/clk/rockchip/clk-rk3036.c
+++ b/drivers/clk/rockchip/clk-rk3036.c
@@ -348,8 +348,11 @@ static struct rockchip_clk_branch rk3036_clk_branches[]
__initdata = { RK2928_CLKSEL_CON(16), 0, 2, MFLAGS, 2, 5, DFLAGS,
RK2928_CLKGATE_CON(10), 5, GFLAGS),
- COMPOSITE_NOGATE(0, "mac_pll_src", mux_pll_src_3plls_p, 0,
- RK2928_CLKSEL_CON(21), 0, 2, MFLAGS, 9, 5, DFLAGS),
+ MUX(SCLK_MACPLL, "mac_pll_pre", mux_pll_src_3plls_p, 0,
+ RK2928_CLKSEL_CON(21), 0, 2, MFLAGS),
+ DIV(0, "mac_pll_src", "mac_pll_pre", 0,
+ RK2928_CLKSEL_CON(21), 9, 5, DFLAGS),
+
MUX(SCLK_MACREF, "mac_clk_ref", mux_mac_p, CLK_SET_RATE_PARENT,
RK2928_CLKSEL_CON(21), 3, 1, MFLAGS),
@@ -408,7 +411,7 @@ static struct rockchip_clk_branch rk3036_clk_branches[]
__initdata = { GATE(HCLK_OTG1, "hclk_otg1", "hclk_peri", CLK_IGNORE_UNUSED,
RK2928_CLKGATE_CON(7), 3, GFLAGS), GATE(HCLK_I2S, "hclk_i2s", "hclk_peri",
0, RK2928_CLKGATE_CON(7), 2, GFLAGS), GATE(0, "hclk_sfc", "hclk_peri",
CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(3), 14, GFLAGS), - GATE(0,
"hclk_mac", "hclk_peri", CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(3), 15,
GFLAGS), + GATE(HCLK_MAC, "hclk_mac", "hclk_peri", 0,
RK2928_CLKGATE_CON(3), 5, GFLAGS),
/* pclk_peri gates */
GATE(0, "pclk_peri_matrix", "pclk_peri", CLK_IGNORE_UNUSED,
RK2928_CLKGATE_CON(4), 1, GFLAGS), diff --git
a/include/dt-bindings/clock/rk3036-cru.h
b/include/dt-bindings/clock/rk3036-cru.h index ebc7a7b..de44109 100644
--- a/include/dt-bindings/clock/rk3036-cru.h
+++ b/include/dt-bindings/clock/rk3036-cru.h
@@ -54,6 +54,7 @@
#define SCLK_PVTM_VIDEO 125
#define SCLK_MAC 151
#define SCLK_MACREF 152
+#define SCLK_MACPLL 153
#define SCLK_SFC 160
/* aclk gates */
@@ -92,6 +93,7 @@
#define HCLK_SDMMC 456
#define HCLK_SDIO 457
#define HCLK_EMMC 459
+#define HCLK_MAC 460
#define HCLK_I2S 462
#define HCLK_LCDC 465
#define HCLK_ROM 467
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--
Thanks,
Caesar