Re: [PATCH v3 7/7] clk: mediatek: mt8195: Add support for frequency hopping through FHCTL
From: AngeloGioacchino Del Regno
Date: Tue Mar 07 2023 - 04:38:27 EST
Il 07/03/23 10:29, Chen-Yu Tsai ha scritto:
On Tue, Mar 7, 2023 at 5:27 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
Il 07/03/23 05:43, Chen-Yu Tsai ha scritto:
On Mon, Feb 6, 2023 at 6:01 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
Add FHCTL parameters and register PLLs through FHCTL to add support
for frequency hopping and SSC. FHCTL will be enabled only on PLLs
specified in devicetree.
This commit brings functional changes only upon addition of
devicetree configuration.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
drivers/clk/mediatek/clk-mt8195-apmixedsys.c | 69 +++++++++++++++++++-
1 file changed, 66 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/mediatek/clk-mt8195-apmixedsys.c b/drivers/clk/mediatek/clk-mt8195-apmixedsys.c
index 1bc917f2667e..c0db31ce0741 100644
--- a/drivers/clk/mediatek/clk-mt8195-apmixedsys.c
+++ b/drivers/clk/mediatek/clk-mt8195-apmixedsys.c
@@ -3,9 +3,11 @@
// Copyright (c) 2021 MediaTek Inc.
// Author: Chun-Jie Chen <chun-jie.chen@xxxxxxxxxxxx>
+#include "clk-fhctl.h"
#include "clk-gate.h"
#include "clk-mtk.h"
#include "clk-pll.h"
+#include "clk-pllfh.h"
#include <dt-bindings/clock/mt8195-clk.h>
#include <linux/of_device.h>
@@ -105,6 +107,61 @@ static const struct mtk_pll_data plls[] = {
0, 0, 22, 0x0158, 24, 0, 0, 0, 0x0158, 0, 0x0158, 0, 9),
};
+enum fh_pll_id {
+ FH_ARMPLL_LL,
+ FH_ARMPLL_BL,
+ FH_MEMPLL,
+ FH_ADSPPLL,
+ FH_NNAPLL,
+ FH_CCIPLL,
+ FH_MFGPLL,
+ FH_TVDPLL2,
+ FH_MPLL,
+ FH_MMPLL,
+ FH_MAINPLL,
+ FH_MSDCPLL,
+ FH_IMGPLL,
+ FH_VDECPLL,
+ FH_TVDPLL1,
+ FH_NR_FH,
+};
+
+#define FH(_pllid, _fhid, _offset) { \
+ .data = { \
+ .pll_id = _pllid, \
+ .fh_id = _fhid, \
+ .fh_ver = FHCTL_PLLFH_V2, \
+ .fhx_offset = _offset, \
+ .dds_mask = GENMASK(21, 0), \
+ .slope0_value = 0x6003c97, \
+ .slope1_value = 0x6003c97, \
Are these
+ .sfstrx_en = BIT(2), \
+ .frddsx_en = BIT(1), \
+ .fhctlx_en = BIT(0), \
+ .tgl_org = BIT(31), \
+ .dvfs_tri = BIT(31), \
+ .pcwchg = BIT(31), \
+ .dt_val = 0x0, \
+ .df_val = 0x9, \
and these just copied from MT8186?
Yes, and that's because they're really the same.
Just to be safe, I asked MediaTek to take a look at the parameters.
Cool. Let's see what they say then!
+ .updnlmt_shft = 16, \
+ .msk_frddsx_dys = GENMASK(23, 20), \
+ .msk_frddsx_dts = GENMASK(19, 16), \
+ }, \
+ }
+
+static struct mtk_pllfh_data pllfhs[] = {
+ FH(CLK_APMIXED_ADSPPLL, FH_ADSPPLL, 0x78),
+ FH(CLK_APMIXED_NNAPLL, FH_NNAPLL, 0x8c),
+ FH(CLK_APMIXED_MFGPLL, FH_MFGPLL, 0xb4),
+ FH(CLK_APMIXED_TVDPLL2, FH_TVDPLL2, 0xc8),
+ FH(CLK_APMIXED_MMPLL, FH_MMPLL, 0xf0),
+ FH(CLK_APMIXED_MAINPLL, FH_MAINPLL, 0x104),
+ FH(CLK_APMIXED_MSDCPLL, FH_MSDCPLL, 0x118),
+ FH(CLK_APMIXED_IMGPLL, FH_IMGPLL, 0x12c),
+ FH(CLK_APMIXED_VDECPLL, FH_VDECPLL, 0x140),
+ FH(CLK_APMIXED_TVDPLL2, FH_TVDPLL1, 0x154),
+};
+
static const struct of_device_id of_match_clk_mt8195_apmixed[] = {
{ .compatible = "mediatek,mt8195-apmixedsys", },
{}
@@ -114,13 +171,17 @@ static int clk_mt8195_apmixed_probe(struct platform_device *pdev)
{
struct clk_hw_onecell_data *clk_data;
struct device_node *node = pdev->dev.of_node;
+ const u8 *fhctl_node = "mediatek,mt8195-fhctl";
int r;
clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK);
if (!clk_data)
return -ENOMEM;
- r = mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data);
+ fhctl_parse_dt(fhctl_node, pllfhs, ARRAY_SIZE(pllfhs));
+
+ r = mtk_clk_register_pllfhs(node, plls, ARRAY_SIZE(plls),
+ pllfhs, ARRAY_SIZE(pllfhs), clk_data);
if (r)
goto free_apmixed_data;
@@ -140,7 +201,8 @@ static int clk_mt8195_apmixed_probe(struct platform_device *pdev)
unregister_gates:
mtk_clk_unregister_gates(apmixed_clks, ARRAY_SIZE(apmixed_clks), clk_data);
unregister_plls:
- mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
+ mtk_clk_unregister_pllfhs(plls, ARRAY_SIZE(plls), pllfhs,
+ ARRAY_SIZE(pllfhs), clk_data);
Nit: I think this could be squeezed into one line.
free_apmixed_data:
mtk_free_clk_data(clk_data);
return r;
@@ -153,7 +215,8 @@ static int clk_mt8195_apmixed_remove(struct platform_device *pdev)
of_clk_del_provider(node);
mtk_clk_unregister_gates(apmixed_clks, ARRAY_SIZE(apmixed_clks), clk_data);
- mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
+ mtk_clk_unregister_pllfhs(plls, ARRAY_SIZE(plls), pllfhs,
+ ARRAY_SIZE(pllfhs), clk_data);
Same here.
That's the same on the others as well, but if I compress those lines I will have
to rebase the clocks cleanup series again and send the 54 patches again.. I'd like
to avoid that noise.
If you really want though, I can do that... what should I do?
I see. Let's keep it the way it is then.
Great. We can always do a small cleanup later, if needed.
Angelo