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openwrt/target/linux/ramips/patches-5.15/005-v6.5-06-mips-ralink-mt7620-remove-clock-related-code.patch
Shiji Yang 1f818b09f8 ramips: add proper system clock and reset driver support for legacy SoCs 
This series of upstream patches properly implement a clock and reset
driver for old ralink SoCs[1]. And it includes some related fixes[2] and
improvements[3][4]. All patches have been merged into linux-next. They
will be part of upcoming Linux 6.5. In order to switch to the new system
controller driver, all clocks and resets properties in SoC dtsi have been
updated, and kernel symbol "CONFIG_CLK_MTMIPS" have been added to the
kernel config files.

[1] https://lore.kernel.org/all/20230619040941.1340372-1-sergio.paracuellos@gmail.com
[2] https://lore.kernel.org/all/20230622-mips-ralink-clk-wuninitialized-v1-1-ea9041240d10@kernel.org
[3] https://lore.kernel.org/all/OSYP286MB03120BABB25900E113ED42B7BC5CA@OSYP286MB0312.JPNP286.PROD.OUTLOOK.COM
[4] https://lore.kernel.org/all/TYAP286MB03151148AF8C054621DD55C3BC23A@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM

Tested on Motorola MWR03 (MT7628)
Tested on Haier HW-L1W (MT7620)

Signed-off-by: Shiji Yang <yangshiji66@qq.com>
2023-07-30 13:09:23 +02:00

328 lines
8.9 KiB
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Raw Blame History

From 04b153abdfcbaba70ceef5a846067d4447fd0078 Mon Sep 17 00:00:00 2001
From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Mon, 19 Jun 2023 06:09:38 +0200
Subject: [PATCH 6/9] mips: ralink: mt7620: remove clock related code
A proper clock driver for ralink SoCs has been added. Hence there is no
need to have clock related code in 'arch/mips/ralink' folder anymore.
Since this is the last clock related code removal, remove also remaining
prototypes in 'common.h' header file.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
arch/mips/include/asm/mach-ralink/mt7620.h | 35 -----
arch/mips/ralink/common.h | 3 -
arch/mips/ralink/mt7620.c | 226 -----------------------------
3 files changed, 264 deletions(-)
--- a/arch/mips/include/asm/mach-ralink/mt7620.h
+++ b/arch/mips/include/asm/mach-ralink/mt7620.h
@@ -19,52 +19,17 @@
#define SYSC_REG_CHIP_REV 0x0c
#define SYSC_REG_SYSTEM_CONFIG0 0x10
#define SYSC_REG_SYSTEM_CONFIG1 0x14
-#define SYSC_REG_CLKCFG0 0x2c
-#define SYSC_REG_CPU_SYS_CLKCFG 0x3c
-#define SYSC_REG_CPLL_CONFIG0 0x54
-#define SYSC_REG_CPLL_CONFIG1 0x58
#define MT7620_CHIP_NAME0 0x3637544d
#define MT7620_CHIP_NAME1 0x20203032
#define MT7628_CHIP_NAME1 0x20203832
-#define SYSCFG0_XTAL_FREQ_SEL BIT(6)
-
#define CHIP_REV_PKG_MASK 0x1
#define CHIP_REV_PKG_SHIFT 16
#define CHIP_REV_VER_MASK 0xf
#define CHIP_REV_VER_SHIFT 8
#define CHIP_REV_ECO_MASK 0xf
-#define CLKCFG0_PERI_CLK_SEL BIT(4)
-
-#define CPU_SYS_CLKCFG_OCP_RATIO_SHIFT 16
-#define CPU_SYS_CLKCFG_OCP_RATIO_MASK 0xf
-#define CPU_SYS_CLKCFG_OCP_RATIO_1 0 /* 1:1 (Reserved) */
-#define CPU_SYS_CLKCFG_OCP_RATIO_1_5 1 /* 1:1.5 (Reserved) */
-#define CPU_SYS_CLKCFG_OCP_RATIO_2 2 /* 1:2 */
-#define CPU_SYS_CLKCFG_OCP_RATIO_2_5 3 /* 1:2.5 (Reserved) */
-#define CPU_SYS_CLKCFG_OCP_RATIO_3 4 /* 1:3 */
-#define CPU_SYS_CLKCFG_OCP_RATIO_3_5 5 /* 1:3.5 (Reserved) */
-#define CPU_SYS_CLKCFG_OCP_RATIO_4 6 /* 1:4 */
-#define CPU_SYS_CLKCFG_OCP_RATIO_5 7 /* 1:5 */
-#define CPU_SYS_CLKCFG_OCP_RATIO_10 8 /* 1:10 */
-#define CPU_SYS_CLKCFG_CPU_FDIV_SHIFT 8
-#define CPU_SYS_CLKCFG_CPU_FDIV_MASK 0x1f
-#define CPU_SYS_CLKCFG_CPU_FFRAC_SHIFT 0
-#define CPU_SYS_CLKCFG_CPU_FFRAC_MASK 0x1f
-
-#define CPLL_CFG0_SW_CFG BIT(31)
-#define CPLL_CFG0_PLL_MULT_RATIO_SHIFT 16
-#define CPLL_CFG0_PLL_MULT_RATIO_MASK 0x7
-#define CPLL_CFG0_LC_CURFCK BIT(15)
-#define CPLL_CFG0_BYPASS_REF_CLK BIT(14)
-#define CPLL_CFG0_PLL_DIV_RATIO_SHIFT 10
-#define CPLL_CFG0_PLL_DIV_RATIO_MASK 0x3
-
-#define CPLL_CFG1_CPU_AUX1 BIT(25)
-#define CPLL_CFG1_CPU_AUX0 BIT(24)
-
#define SYSCFG0_DRAM_TYPE_MASK 0x3
#define SYSCFG0_DRAM_TYPE_SHIFT 4
#define SYSCFG0_DRAM_TYPE_SDRAM 0
--- a/arch/mips/ralink/common.h
+++ b/arch/mips/ralink/common.h
@@ -23,9 +23,6 @@ extern struct ralink_soc_info soc_info;
extern void ralink_of_remap(void);
-extern void ralink_clk_init(void);
-extern void ralink_clk_add(const char *dev, unsigned long rate);
-
extern void ralink_rst_init(void);
extern void __init prom_soc_init(struct ralink_soc_info *soc_info);
--- a/arch/mips/ralink/mt7620.c
+++ b/arch/mips/ralink/mt7620.c
@@ -34,12 +34,6 @@
#define PMU1_CFG 0x8C
#define DIG_SW_SEL BIT(25)
-/* clock scaling */
-#define CLKCFG_FDIV_MASK 0x1f00
-#define CLKCFG_FDIV_USB_VAL 0x0300
-#define CLKCFG_FFRAC_MASK 0x001f
-#define CLKCFG_FFRAC_USB_VAL 0x0003
-
/* EFUSE bits */
#define EFUSE_MT7688 0x100000
@@ -49,226 +43,6 @@
/* does the board have sdram or ddram */
static int dram_type;
-static __init u32
-mt7620_calc_rate(u32 ref_rate, u32 mul, u32 div)
-{
- u64 t;
-
- t = ref_rate;
- t *= mul;
- do_div(t, div);
-
- return t;
-}
-
-#define MHZ(x) ((x) * 1000 * 1000)
-
-static __init unsigned long
-mt7620_get_xtal_rate(void)
-{
- u32 reg;
-
- reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
- if (reg & SYSCFG0_XTAL_FREQ_SEL)
- return MHZ(40);
-
- return MHZ(20);
-}
-
-static __init unsigned long
-mt7620_get_periph_rate(unsigned long xtal_rate)
-{
- u32 reg;
-
- reg = rt_sysc_r32(SYSC_REG_CLKCFG0);
- if (reg & CLKCFG0_PERI_CLK_SEL)
- return xtal_rate;
-
- return MHZ(40);
-}
-
-static const u32 mt7620_clk_divider[] __initconst = { 2, 3, 4, 8 };
-
-static __init unsigned long
-mt7620_get_cpu_pll_rate(unsigned long xtal_rate)
-{
- u32 reg;
- u32 mul;
- u32 div;
-
- reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG0);
- if (reg & CPLL_CFG0_BYPASS_REF_CLK)
- return xtal_rate;
-
- if ((reg & CPLL_CFG0_SW_CFG) == 0)
- return MHZ(600);
-
- mul = (reg >> CPLL_CFG0_PLL_MULT_RATIO_SHIFT) &
- CPLL_CFG0_PLL_MULT_RATIO_MASK;
- mul += 24;
- if (reg & CPLL_CFG0_LC_CURFCK)
- mul *= 2;
-
- div = (reg >> CPLL_CFG0_PLL_DIV_RATIO_SHIFT) &
- CPLL_CFG0_PLL_DIV_RATIO_MASK;
-
- WARN_ON(div >= ARRAY_SIZE(mt7620_clk_divider));
-
- return mt7620_calc_rate(xtal_rate, mul, mt7620_clk_divider[div]);
-}
-
-static __init unsigned long
-mt7620_get_pll_rate(unsigned long xtal_rate, unsigned long cpu_pll_rate)
-{
- u32 reg;
-
- reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG1);
- if (reg & CPLL_CFG1_CPU_AUX1)
- return xtal_rate;
-
- if (reg & CPLL_CFG1_CPU_AUX0)
- return MHZ(480);
-
- return cpu_pll_rate;
-}
-
-static __init unsigned long
-mt7620_get_cpu_rate(unsigned long pll_rate)
-{
- u32 reg;
- u32 mul;
- u32 div;
-
- reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
-
- mul = reg & CPU_SYS_CLKCFG_CPU_FFRAC_MASK;
- div = (reg >> CPU_SYS_CLKCFG_CPU_FDIV_SHIFT) &
- CPU_SYS_CLKCFG_CPU_FDIV_MASK;
-
- return mt7620_calc_rate(pll_rate, mul, div);
-}
-
-static const u32 mt7620_ocp_dividers[16] __initconst = {
- [CPU_SYS_CLKCFG_OCP_RATIO_2] = 2,
- [CPU_SYS_CLKCFG_OCP_RATIO_3] = 3,
- [CPU_SYS_CLKCFG_OCP_RATIO_4] = 4,
- [CPU_SYS_CLKCFG_OCP_RATIO_5] = 5,
- [CPU_SYS_CLKCFG_OCP_RATIO_10] = 10,
-};
-
-static __init unsigned long
-mt7620_get_dram_rate(unsigned long pll_rate)
-{
- if (dram_type == SYSCFG0_DRAM_TYPE_SDRAM)
- return pll_rate / 4;
-
- return pll_rate / 3;
-}
-
-static __init unsigned long
-mt7620_get_sys_rate(unsigned long cpu_rate)
-{
- u32 reg;
- u32 ocp_ratio;
- u32 div;
-
- reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
-
- ocp_ratio = (reg >> CPU_SYS_CLKCFG_OCP_RATIO_SHIFT) &
- CPU_SYS_CLKCFG_OCP_RATIO_MASK;
-
- if (WARN_ON(ocp_ratio >= ARRAY_SIZE(mt7620_ocp_dividers)))
- return cpu_rate;
-
- div = mt7620_ocp_dividers[ocp_ratio];
- if (WARN(!div, "invalid divider for OCP ratio %u", ocp_ratio))
- return cpu_rate;
-
- return cpu_rate / div;
-}
-
-void __init ralink_clk_init(void)
-{
- unsigned long xtal_rate;
- unsigned long cpu_pll_rate;
- unsigned long pll_rate;
- unsigned long cpu_rate;
- unsigned long sys_rate;
- unsigned long dram_rate;
- unsigned long periph_rate;
- unsigned long pcmi2s_rate;
-
- xtal_rate = mt7620_get_xtal_rate();
-
-#define RFMT(label) label ":%lu.%03luMHz "
-#define RINT(x) ((x) / 1000000)
-#define RFRAC(x) (((x) / 1000) % 1000)
-
- if (is_mt76x8()) {
- if (xtal_rate == MHZ(40))
- cpu_rate = MHZ(580);
- else
- cpu_rate = MHZ(575);
- dram_rate = sys_rate = cpu_rate / 3;
- periph_rate = MHZ(40);
- pcmi2s_rate = MHZ(480);
-
- ralink_clk_add("10000d00.uartlite", periph_rate);
- ralink_clk_add("10000e00.uartlite", periph_rate);
- } else {
- cpu_pll_rate = mt7620_get_cpu_pll_rate(xtal_rate);
- pll_rate = mt7620_get_pll_rate(xtal_rate, cpu_pll_rate);
-
- cpu_rate = mt7620_get_cpu_rate(pll_rate);
- dram_rate = mt7620_get_dram_rate(pll_rate);
- sys_rate = mt7620_get_sys_rate(cpu_rate);
- periph_rate = mt7620_get_periph_rate(xtal_rate);
- pcmi2s_rate = periph_rate;
-
- pr_debug(RFMT("XTAL") RFMT("CPU_PLL") RFMT("PLL"),
- RINT(xtal_rate), RFRAC(xtal_rate),
- RINT(cpu_pll_rate), RFRAC(cpu_pll_rate),
- RINT(pll_rate), RFRAC(pll_rate));
-
- ralink_clk_add("10000500.uart", periph_rate);
- }
-
- pr_debug(RFMT("CPU") RFMT("DRAM") RFMT("SYS") RFMT("PERIPH"),
- RINT(cpu_rate), RFRAC(cpu_rate),
- RINT(dram_rate), RFRAC(dram_rate),
- RINT(sys_rate), RFRAC(sys_rate),
- RINT(periph_rate), RFRAC(periph_rate));
-#undef RFRAC
-#undef RINT
-#undef RFMT
-
- ralink_clk_add("cpu", cpu_rate);
- ralink_clk_add("10000100.timer", periph_rate);
- ralink_clk_add("10000120.watchdog", periph_rate);
- ralink_clk_add("10000900.i2c", periph_rate);
- ralink_clk_add("10000a00.i2s", pcmi2s_rate);
- ralink_clk_add("10000b00.spi", sys_rate);
- ralink_clk_add("10000b40.spi", sys_rate);
- ralink_clk_add("10000c00.uartlite", periph_rate);
- ralink_clk_add("10000d00.uart1", periph_rate);
- ralink_clk_add("10000e00.uart2", periph_rate);
- ralink_clk_add("10180000.wmac", xtal_rate);
-
- if (IS_ENABLED(CONFIG_USB) && !is_mt76x8()) {
- /*
- * When the CPU goes into sleep mode, the BUS clock will be
- * too low for USB to function properly. Adjust the busses
- * fractional divider to fix this
- */
- u32 val = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
-
- val &= ~(CLKCFG_FDIV_MASK | CLKCFG_FFRAC_MASK);
- val |= CLKCFG_FDIV_USB_VAL | CLKCFG_FFRAC_USB_VAL;
-
- rt_sysc_w32(val, SYSC_REG_CPU_SYS_CLKCFG);
- }
-}
-
void __init ralink_of_remap(void)
{
rt_sysc_membase = plat_of_remap_node("ralink,mt7620a-sysc");
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