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[src/trunk]: src/sys/arch/arm/sunxi Add the clock providers for the sun6i_a31...



details:   https://anonhg.NetBSD.org/src/rev/91d4cbefa4c7
branches:  trunk
changeset: 970535:91d4cbefa4c7
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Fri Mar 27 01:42:10 2020 +0000

description:
Add the clock providers for the sun6i_a31, sun8i_a23, sun8i_r40, sun8i_v3,
sun8i_h3, sun50i_h5 (same as H3), and sun50i_h6 RTC blocks.

diffstat:

 sys/arch/arm/sunxi/sunxi_rtc.c |  373 ++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 367 insertions(+), 6 deletions(-)

diffs (truncated from 479 to 300 lines):

diff -r 54bb9c3aa622 -r 91d4cbefa4c7 sys/arch/arm/sunxi/sunxi_rtc.c
--- a/sys/arch/arm/sunxi/sunxi_rtc.c    Fri Mar 27 00:17:08 2020 +0000
+++ b/sys/arch/arm/sunxi/sunxi_rtc.c    Fri Mar 27 01:42:10 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sunxi_rtc.c,v 1.5 2019/09/05 23:42:26 thorpej Exp $ */
+/* $NetBSD: sunxi_rtc.c,v 1.6 2020/03/27 01:42:10 thorpej Exp $ */
 
 /*-
  * Copyright (c) 2014-2017 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sunxi_rtc.c,v 1.5 2019/09/05 23:42:26 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sunxi_rtc.c,v 1.6 2020/03/27 01:42:10 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -37,6 +37,7 @@
 #include <sys/mutex.h>
 
 #include <dev/clock_subr.h>
+#include <dev/clk/clk_backend.h>
 
 #include <dev/fdt/fdtvar.h>
 
@@ -64,6 +65,18 @@
 #define         SUN7I_RTC_SECOND       __BITS(5,0)
 #define        SUN7I_RTC_BASE_YEAR     1970
 
+#define        SUN6I_LOSC_CTRL_REG     0x00
+#define         SUN6I_LOSC_CTRL_KEY            (0x16aa << 16)
+#define         SUN6I_LOSC_CTRL_AUTO_SWT_BYPASS __BIT(15)
+#define         SUN6I_LOSC_CTRL_ALM_DHMS_ACC   __BIT(9)
+#define         SUN6I_LOSC_CTRL_RTC_HMS_ACC    __BIT(8)
+#define         SUN6I_LOSC_CTRL_RTC_YMD_ACC    __BIT(7)
+#define         SUN6I_LOSC_CTRL_EXT_LOSC_EN    __BIT(4)
+#define         SUN6I_LOSC_CTRL_EXT_OSC        __BIT(0)
+
+#define        SUN6I_INTOSC_CLK_PRESCAL_REG 0x08
+#define         SUN6I_INTOSC_CLK_PRESCAL       __BITS(0,4)
+
 #define        SUN6I_RTC_YY_MM_DD_REG  0x10
 #define         SUN6I_RTC_LEAP         __BIT(22)
 #define         SUN6I_RTC_YEAR         __BITS(21,16)
@@ -76,14 +89,25 @@
 #define         SUN6I_RTC_SECOND       __BITS(5,0)
 #define        SUN6I_RTC_BASE_YEAR     2000
 
+#define        SUN6I_RTC_LOSC_OUT_GATING_REG 0x60
+#define         SUN6I_RTC_LOSC_OUT_EN  __BIT(0)
+
 struct sunxi_rtc_config {
        bus_size_t      yy_mm_dd_reg;
        uint32_t        leap, year, month, day;
        bus_size_t      hh_mm_ss_reg;
        uint32_t        wk_no, hour, minute, second;
        u_int           base_year;
+
+       u_int           iosc_rate;
+       u_int           fixed_prescaler;
+       uint32_t        ext_losc_en;
+       uint32_t        auto_swt_bypass;
+       u_int           flags;
 };
 
+#define        SUNXI_RTC_F_HAS_VAR_PRESCALER   __BIT(0)
+
 static const struct sunxi_rtc_config sun4i_rtc_config = {
        .yy_mm_dd_reg = SUN4I_RTC_YY_MM_DD_REG,
        .leap = SUN4I_RTC_LEAP,
@@ -98,7 +122,7 @@
        .base_year = SUN4I_RTC_BASE_YEAR,
 };
 
-static const struct sunxi_rtc_config sun6i_rtc_config = {
+static const struct sunxi_rtc_config sun6i_a31_rtc_config = {
        .yy_mm_dd_reg = SUN6I_RTC_YY_MM_DD_REG,
        .leap = SUN6I_RTC_LEAP,
        .year = SUN6I_RTC_YEAR,
@@ -110,6 +134,9 @@
        .minute = SUN6I_RTC_MINUTE,
        .second = SUN6I_RTC_SECOND,
        .base_year = SUN6I_RTC_BASE_YEAR,
+
+       .iosc_rate = 667000,
+       .flags = SUNXI_RTC_F_HAS_VAR_PRESCALER,
 };
 
 static const struct sunxi_rtc_config sun7i_rtc_config = {
@@ -126,21 +153,142 @@
        .base_year = SUN7I_RTC_BASE_YEAR,
 };
 
+static const struct sunxi_rtc_config sun8i_a23_rtc_config = {
+       .yy_mm_dd_reg = SUN6I_RTC_YY_MM_DD_REG,
+       .leap = SUN6I_RTC_LEAP,
+       .year = SUN6I_RTC_YEAR,
+       .month = SUN6I_RTC_MONTH,
+       .day = SUN6I_RTC_DAY,
+       .hh_mm_ss_reg = SUN6I_RTC_HH_MM_SS_REG,
+       .wk_no = SUN6I_RTC_WK_NO,
+       .hour = SUN6I_RTC_HOUR,
+       .minute = SUN6I_RTC_MINUTE,
+       .second = SUN6I_RTC_SECOND,
+       .base_year = SUN6I_RTC_BASE_YEAR,
+
+       .iosc_rate = 667000,
+       .flags = SUNXI_RTC_F_HAS_VAR_PRESCALER,
+};
+
+static const struct sunxi_rtc_config sun8i_r40_rtc_config = {
+       .yy_mm_dd_reg = SUN6I_RTC_YY_MM_DD_REG,
+       .leap = SUN6I_RTC_LEAP,
+       .year = SUN6I_RTC_YEAR,
+       .month = SUN6I_RTC_MONTH,
+       .day = SUN6I_RTC_DAY,
+       .hh_mm_ss_reg = SUN6I_RTC_HH_MM_SS_REG,
+       .wk_no = SUN6I_RTC_WK_NO,
+       .hour = SUN6I_RTC_HOUR,
+       .minute = SUN6I_RTC_MINUTE,
+       .second = SUN6I_RTC_SECOND,
+       .base_year = SUN6I_RTC_BASE_YEAR,
+
+       .iosc_rate = 16000000,
+       .fixed_prescaler = 512,
+};
+
+static const struct sunxi_rtc_config sun8i_v3_rtc_config = {
+       .yy_mm_dd_reg = SUN6I_RTC_YY_MM_DD_REG,
+       .leap = SUN6I_RTC_LEAP,
+       .year = SUN6I_RTC_YEAR,
+       .month = SUN6I_RTC_MONTH,
+       .day = SUN6I_RTC_DAY,
+       .hh_mm_ss_reg = SUN6I_RTC_HH_MM_SS_REG,
+       .wk_no = SUN6I_RTC_WK_NO,
+       .hour = SUN6I_RTC_HOUR,
+       .minute = SUN6I_RTC_MINUTE,
+       .second = SUN6I_RTC_SECOND,
+       .base_year = SUN6I_RTC_BASE_YEAR,
+
+       .iosc_rate = 32000,
+};
+
+static const struct sunxi_rtc_config sun8i_h3_rtc_config = {
+       .yy_mm_dd_reg = SUN6I_RTC_YY_MM_DD_REG,
+       .leap = SUN6I_RTC_LEAP,
+       .year = SUN6I_RTC_YEAR,
+       .month = SUN6I_RTC_MONTH,
+       .day = SUN6I_RTC_DAY,
+       .hh_mm_ss_reg = SUN6I_RTC_HH_MM_SS_REG,
+       .wk_no = SUN6I_RTC_WK_NO,
+       .hour = SUN6I_RTC_HOUR,
+       .minute = SUN6I_RTC_MINUTE,
+       .second = SUN6I_RTC_SECOND,
+       .base_year = SUN6I_RTC_BASE_YEAR,
+
+       .iosc_rate = 16000000,
+       .fixed_prescaler = 32,
+       .flags = SUNXI_RTC_F_HAS_VAR_PRESCALER,
+};
+
+static const struct sunxi_rtc_config sun50i_h6_rtc_config = {
+       .yy_mm_dd_reg = SUN6I_RTC_YY_MM_DD_REG,
+       .leap = SUN6I_RTC_LEAP,
+       .year = SUN6I_RTC_YEAR,
+       .month = SUN6I_RTC_MONTH,
+       .day = SUN6I_RTC_DAY,
+       .hh_mm_ss_reg = SUN6I_RTC_HH_MM_SS_REG,
+       .wk_no = SUN6I_RTC_WK_NO,
+       .hour = SUN6I_RTC_HOUR,
+       .minute = SUN6I_RTC_MINUTE,
+       .second = SUN6I_RTC_SECOND,
+       .base_year = SUN6I_RTC_BASE_YEAR,
+
+       .iosc_rate = 16000000,
+       .fixed_prescaler = 32,
+       .auto_swt_bypass = SUN6I_LOSC_CTRL_AUTO_SWT_BYPASS,
+       .ext_losc_en = SUN6I_LOSC_CTRL_EXT_LOSC_EN,
+       .flags = SUNXI_RTC_F_HAS_VAR_PRESCALER,
+};
+
 static const struct of_compat_data compat_data[] = {
        { "allwinner,sun4i-a10-rtc",            (uintptr_t)&sun4i_rtc_config },
-       { "allwinner,sun6i-a31-rtc",            (uintptr_t)&sun6i_rtc_config },
+       { "allwinner,sun6i-a31-rtc",            (uintptr_t)&sun6i_a31_rtc_config },
        { "allwinner,sun7i-a20-rtc",            (uintptr_t)&sun7i_rtc_config },
-       { "allwinner,sun8i-h3-rtc",             (uintptr_t)&sun6i_rtc_config },
-       { "allwinner,sun50i-h5-rtc",            (uintptr_t)&sun6i_rtc_config },
+       { "allwinner,sun8i-a23-rtc",            (uintptr_t)&sun8i_a23_rtc_config },
+       { "allwinner,sun8i-r40-rtc",            (uintptr_t)&sun8i_r40_rtc_config },
+       { "allwinner,sun8i-v3-rtc",             (uintptr_t)&sun8i_v3_rtc_config },
+       { "allwinner,sun8i-h3-rtc",             (uintptr_t)&sun8i_h3_rtc_config },
+       { "allwinner,sun50i-h5-rtc",            (uintptr_t)&sun8i_h3_rtc_config },
+       { "allwinner,sun50i-h6-rtc",            (uintptr_t)&sun50i_h6_rtc_config },
        { NULL }
 };
 
+#define        SUNXI_RTC_CLK_LOSC      0
+#define        SUNXI_RTC_CLK_LOSC_GATE 1
+#define        SUNXI_RTC_CLK_IOSC      2
+#define        SUNXI_RTC_NCLKS         3
+
 struct sunxi_rtc_softc {
        device_t sc_dev;
        bus_space_tag_t sc_bst;
        bus_space_handle_t sc_bsh;
        struct todr_chip_handle sc_todr;
        const struct sunxi_rtc_config *sc_conf;
+
+       int sc_phandle;
+
+       struct clk *sc_parent_clk;      /* external oscillator */
+
+       /*
+        * We export up to 3 clocks:
+        * [0] The local oscillator output
+        * [1] Gated version of [0]
+        * [2] The internal oscillator
+        *
+        * The local oscillator is driven either by the internal
+        * oscillator (less precise) or an external oscillator.
+        *
+        * Note that these are the order they appear in the device
+        * tree "clock-output-names" property for our node.  Not
+        * all flavors of the Allwinner SoCs export all of these
+        * clocks, so we export only those that appear in the
+        * "clock-output-names" property.
+        */
+       const char *sc_clk_names[SUNXI_RTC_NCLKS];
+       struct clk sc_clks[SUNXI_RTC_NCLKS];
+       kmutex_t sc_clk_mutex;
+       struct clk_domain sc_clkdom;
 };
 
 #define RTC_READ(sc, reg) \
@@ -154,6 +302,47 @@
 static int     sunxi_rtc_gettime(todr_chip_handle_t, struct clock_ymdhms *);
 static int     sunxi_rtc_settime(todr_chip_handle_t, struct clock_ymdhms *);
 
+static struct clk *
+               sunxi_rtc_clk_get(void *, const char *);
+static u_int   sunxi_rtc_clk_get_rate(void *, struct clk *);
+static int     sunxi_rtc_clk_enable(void *, struct clk *);
+static int     sunxi_rtc_clk_disable(void *, struct clk *);
+static int     sunxi_rtc_clk_set_parent(void *, struct clk *, struct clk *);
+static struct clk *
+               sunxi_rtc_clk_get_parent(void *, struct clk *);
+
+static const struct clk_funcs sunxi_rtc_clk_funcs = {
+       .get = sunxi_rtc_clk_get,
+       .get_rate = sunxi_rtc_clk_get_rate,
+       .enable = sunxi_rtc_clk_enable,
+       .disable = sunxi_rtc_clk_disable,
+       .set_parent = sunxi_rtc_clk_set_parent,
+       .get_parent = sunxi_rtc_clk_get_parent,
+};
+
+static struct clk *
+sunxi_rtc_clock_decode(device_t dev, int cc_phandle, const void *data,
+                      size_t len)
+{
+       struct sunxi_rtc_softc * const sc = device_private(dev);
+
+       if (len != 4)
+               return NULL;
+       
+       const u_int clock_id = be32dec(data);
+       if (clock_id >= SUNXI_RTC_NCLKS)
+               return NULL;
+       
+       if (sc->sc_clk_names[clock_id] == NULL)
+               return NULL;
+       
+       return &sc->sc_clks[clock_id];
+}
+
+static const struct fdtbus_clock_controller_func sunxi_rtc_fdtclock_funcs = {
+       .decode = sunxi_rtc_clock_decode,
+};
+
 CFATTACH_DECL_NEW(sunxi_rtc, sizeof(struct sunxi_rtc_softc),
        sunxi_rtc_match, sunxi_rtc_attach, NULL, NULL);
 
@@ -174,6 +363,8 @@
        bus_addr_t addr;
        bus_size_t size;
 
+       sc->sc_phandle = phandle;
+
        if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
                aprint_error(": couldn't get registers\n");
                return;
@@ -190,11 +381,50 @@
        aprint_naive("\n");
        aprint_normal(": RTC\n");
 
+       mutex_init(&sc->sc_clk_mutex, MUTEX_DEFAULT, IPL_HIGH);
+
        sc->sc_todr.cookie = sc;



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