[PATCH v2 6/9] mips: ralink: mt7620: remove clock related code

Sergio Paracuellos
2023-03-21T05:01:14Z

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>
---
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(-)

diff --git a/arch/mips/include/asm/mach-ralink/mt7620.h b/arch/mips/include/asm/mach-ralink/mt7620.h
index 3e37705ea9cf..62f4f072c003 100644
--- a/arch/mips/include/asm/mach-ralink/mt7620.h
+++ b/arch/mips/include/asm/mach-ralink/mt7620.h
@@ -20,52 +20,17 @@
#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
diff --git a/arch/mips/ralink/common.h b/arch/mips/ralink/common.h
index 87fc16751281..fcdfc9dc6210 100644
--- 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);
diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c
index 4435f50b8d24..f44915b0b0c2 100644
--- a/arch/mips/ralink/mt7620.c
+++ b/arch/mips/ralink/mt7620.c
@@ -36,12 +36,6 @@
#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

@@ -53,226 +47,6 @@ static int dram_type;

static struct ralink_soc_info *soc_info_ptr;

-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");
--
2.25.1