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95 lines
2.8 KiB
Diff
95 lines
2.8 KiB
Diff
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From 3d094e4c65ce95f1400e0dc8ec189cdf558dbec6 Mon Sep 17 00:00:00 2001
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From: Giedrius <giedrius@blokas.io>
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Date: Mon, 22 Jan 2024 13:26:58 +0000
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Subject: [PATCH 0845/1085] Pisound: Read out the SPI speed to use from the
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Device Tree.
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Signed-off-by: Giedrius Trainavičius <giedrius@blokas.io>
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---
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sound/soc/bcm/pisound.c | 31 ++++++++++++++++++++++++++-----
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1 file changed, 26 insertions(+), 5 deletions(-)
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--- a/sound/soc/bcm/pisound.c
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+++ b/sound/soc/bcm/pisound.c
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@@ -1,6 +1,6 @@
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/*
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* Pisound Linux kernel module.
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- * Copyright (C) 2016-2020 Vilniaus Blokas UAB, https://blokas.io/pisound
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+ * Copyright (C) 2016-2024 Vilniaus Blokas UAB, https://blokas.io/pisound
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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@@ -142,14 +142,14 @@ static void pisnd_input_trigger(struct s
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}
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}
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-static struct snd_rawmidi_ops pisnd_output_ops = {
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+static const struct snd_rawmidi_ops pisnd_output_ops = {
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.open = pisnd_output_open,
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.close = pisnd_output_close,
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.trigger = pisnd_output_trigger,
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.drain = pisnd_output_drain,
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};
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-static struct snd_rawmidi_ops pisnd_input_ops = {
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+static const struct snd_rawmidi_ops pisnd_input_ops = {
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.open = pisnd_input_open,
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.close = pisnd_input_close,
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.trigger = pisnd_input_trigger,
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@@ -226,6 +226,7 @@ static char g_id[25];
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enum { MAX_VERSION_STR_LEN = 6 };
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static char g_fw_version[MAX_VERSION_STR_LEN];
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static char g_hw_version[MAX_VERSION_STR_LEN];
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+static u32 g_spi_speed_hz;
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static uint8_t g_ledFlashDuration;
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static bool g_ledFlashDurationChanged;
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@@ -329,7 +330,7 @@ static void spi_transfer(const uint8_t *
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transfer.tx_buf = txbuf;
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transfer.rx_buf = rxbuf;
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transfer.len = len;
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- transfer.speed_hz = 150000;
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+ transfer.speed_hz = g_spi_speed_hz;
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transfer.delay.value = 10;
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transfer.delay.unit = SPI_DELAY_UNIT_USECS;
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@@ -646,6 +647,26 @@ static int pisnd_spi_init(struct device
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memset(g_fw_version, 0, sizeof(g_fw_version));
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memset(g_hw_version, 0, sizeof(g_hw_version));
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+ g_spi_speed_hz = 150000;
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+ if (dev->of_node) {
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+ struct device_node *spi_node;
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+
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+ spi_node = of_parse_phandle(
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+ dev->of_node,
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+ "spi-controller",
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+ 0
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+ );
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+
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+ if (spi_node) {
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+ ret = of_property_read_u32(spi_node, "spi-speed-hz", &g_spi_speed_hz);
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+ if (ret != 0)
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+ printe("Failed reading spi-speed-hz! (%d)\n", ret);
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+
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+ of_node_put(spi_node);
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+ }
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+ }
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+ printi("Using SPI speed: %u\n", g_spi_speed_hz);
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+
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spi = pisnd_spi_find_device();
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if (spi != NULL) {
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@@ -950,7 +971,7 @@ static int pisnd_startup(struct snd_pcm_
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return 0;
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}
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-static struct snd_soc_ops pisnd_ops = {
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+static const struct snd_soc_ops pisnd_ops = {
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.startup = pisnd_startup,
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.hw_params = pisnd_hw_params,
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};
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