Re: [PATCH V6 2/3] clk: meson: S4: add support for Amlogic S4 SoC PLL clock driver
From: Yu Tu
Date: Sat Jan 28 2023 - 03:37:15 EST
On 2023/1/20 17:43, Jerome Brunet wrote:
[ EXTERNAL EMAIL ]
On Fri 20 Jan 2023 at 10:58, Yu Tu <yu.tu@xxxxxxxxxxx> wrote:
Hi Jerome,
On 2023/1/19 19:20, Jerome Brunet wrote:
[ EXTERNAL EMAIL ]
On Mon 16 Jan 2023 at 15:42, Yu Tu <yu.tu@xxxxxxxxxxx> wrote:
Add the S4 PLL clock controller driver in the s4 SoC family.
Signed-off-by: Yu Tu <yu.tu@xxxxxxxxxxx>
---
[...]
+
+static struct clk_regmap s4_fclk_div2 = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = ANACTRL_FIXPLL_CTRL1,
+ .bit_idx = 24,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "fclk_div2",
+ .ops = &clk_regmap_gate_ro_ops,
On the previous SoC, these fixed divider gate were not read-only.
They are marked as critical when necessary, with the appropriate
comment.
Why is it different on the s4 ?
In fact, this part of the SOC is no different from the previous G12a/b and
so on.
I remember that my first version was made according to G12A, and I changed
this way under your suggestion.
Maybe you were busy and forgot. For me, this mode and the previous g12a
mode function is ok. I can do either. So now how do you decide to go that
way?
No I did not forgot.
I told you that cannot put CRITICAL (or IGNORE_USED) without explaining
why. I stand by this. Same goes for RO ops.
I will add an explanation.
+ .parent_hws = (const struct clk_hw *[]) {
+ &s4_fclk_div2_div.hw
+ },
+ .num_parents = 1,
+ },
+};
+
[...]
+#ifndef __MESON_S4_PLL_H__
+#define __MESON_S4_PLL_H__
+
+/* ANA_CTRL - Registers
+ * REG_BASE: REGISTER_BASE_ADDR = 0xfe008000
This multi-line comment style is wrong in clk/
REG_BASE is not used so I'm not sure this is useful
I will remove REG_BASE and change this format in next version.
+ */
+#define ANACTRL_FIXPLL_CTRL0 0x040
+#define ANACTRL_FIXPLL_CTRL1 0x044
+#define ANACTRL_FIXPLL_CTRL2 0x048
+#define ANACTRL_FIXPLL_CTRL3 0x04c
+#define ANACTRL_FIXPLL_CTRL4 0x050
+#define ANACTRL_FIXPLL_CTRL5 0x054
+#define ANACTRL_FIXPLL_CTRL6 0x058
+#define ANACTRL_FIXPLL_STS 0x05c
+#define ANACTRL_GP0PLL_CTRL0 0x080
+#define ANACTRL_GP0PLL_CTRL1 0x084
+#define ANACTRL_GP0PLL_CTRL2 0x088
+#define ANACTRL_GP0PLL_CTRL3 0x08c
+#define ANACTRL_GP0PLL_CTRL4 0x090
+#define ANACTRL_GP0PLL_CTRL5 0x094
+#define ANACTRL_GP0PLL_CTRL6 0x098
+#define ANACTRL_GP0PLL_STS 0x09c
+#define ANACTRL_HIFIPLL_CTRL0 0x100
+#define ANACTRL_HIFIPLL_CTRL1 0x104
+#define ANACTRL_HIFIPLL_CTRL2 0x108
+#define ANACTRL_HIFIPLL_CTRL3 0x10c
+#define ANACTRL_HIFIPLL_CTRL4 0x110
+#define ANACTRL_HIFIPLL_CTRL5 0x114
+#define ANACTRL_HIFIPLL_CTRL6 0x118
+#define ANACTRL_HIFIPLL_STS 0x11c
+#define ANACTRL_MPLL_CTRL0 0x180
+#define ANACTRL_MPLL_CTRL1 0x184
+#define ANACTRL_MPLL_CTRL2 0x188
+#define ANACTRL_MPLL_CTRL3 0x18c
+#define ANACTRL_MPLL_CTRL4 0x190
+#define ANACTRL_MPLL_CTRL5 0x194
+#define ANACTRL_MPLL_CTRL6 0x198
+#define ANACTRL_MPLL_CTRL7 0x19c
+#define ANACTRL_MPLL_CTRL8 0x1a0
+#define ANACTRL_MPLL_STS 0x1a4
+#define ANACTRL_HDMIPLL_CTRL0 0x1c0
+#define ANACTRL_HDMIPLL_CTRL1 0x1c4
+#define ANACTRL_HDMIPLL_CTRL2 0x1c8
+#define ANACTRL_HDMIPLL_CTRL3 0x1cc
+#define ANACTRL_HDMIPLL_CTRL4 0x1d0
+#define ANACTRL_HDMIPLL_CTRL5 0x1d4
+#define ANACTRL_HDMIPLL_CTRL6 0x1d8
+#define ANACTRL_HDMIPLL_STS 0x1dc
+#define ANACTRL_HDMIPLL_VLOCK 0x1e4
+
+/*
+ * CLKID index values
+ *
+ * These indices are entirely contrived and do not map onto the hardware.
+ * It has now been decided to expose everything by default in the DT header:
+ * include/dt-bindings/clock/axg-clkc.h. Only the clocks ids we don't want
+ * to expose, such as the internal muxes and dividers of composite clocks,
+ * will remain defined here.
+ */
+#define CLKID_FIXED_PLL_DCO 0
+#define CLKID_FCLK_DIV2_DIV 2
+#define CLKID_FCLK_DIV3_DIV 4
+#define CLKID_FCLK_DIV4_DIV 6
+#define CLKID_FCLK_DIV5_DIV 8
+#define CLKID_FCLK_DIV7_DIV 10
+#define CLKID_FCLK_DIV2P5_DIV 12
+#define CLKID_GP0_PLL_DCO 14
+#define CLKID_HIFI_PLL_DCO 16
+#define CLKID_HDMI_PLL_DCO 18
+#define CLKID_HDMI_PLL_OD 19
+#define CLKID_MPLL_50M_DIV 21
+#define CLKID_MPLL_PREDIV 23
+#define CLKID_MPLL0_DIV 24
+#define CLKID_MPLL1_DIV 26
+#define CLKID_MPLL2_DIV 28
+#define CLKID_MPLL3_DIV 30
+
+#define NR_PLL_CLKS 32
+/* include the CLKIDs that have been made part of the DT binding */
+#include <dt-bindings/clock/amlogic,s4-pll-clkc.h>
+
+#endif /* __MESON_S4_PLL_H__ */