[PATCH rtems v2 05/12] bsps/imxrt: Get clock for IMXRT11xx in drivers
Christian Mauderer
christian.mauderer at embedded-brains.de
Tue May 9 12:10:52 UTC 2023
The mcux_sdk has a different interface for getting the clock for
IMXRT11xx than for getting it in IMXRT10xx. Adapt simple drivers to
support that interface.
---
bsps/arm/imxrt/console/console.c | 35 +++++++++++++++++--
bsps/arm/imxrt/i2c/imxrt-lpi2c.c | 18 ++++++++--
.../imxrt/mcux-sdk/drivers/qtmr_1/fsl_qtmr.c | 8 +++++
bsps/arm/imxrt/spi/imxrt-lpspi.c | 18 ++++++++--
4 files changed, 73 insertions(+), 6 deletions(-)
diff --git a/bsps/arm/imxrt/console/console.c b/bsps/arm/imxrt/console/console.c
index 05320f2c4c..e3f6a091c6 100644
--- a/bsps/arm/imxrt/console/console.c
+++ b/bsps/arm/imxrt/console/console.c
@@ -53,6 +53,7 @@ typedef struct {
volatile LPUART_Type *regs;
rtems_vector_number irq;
const char *path;
+ clock_ip_name_t clock_ip;
uint32_t src_clock_hz;
lpuart_config_t config;
} imxrt_lpuart_context;
@@ -174,12 +175,15 @@ static bool imxrt_lpuart_set_attributes(
return true;
}
-static uint32_t imxrt_lpuart_get_src_freq(void)
+static uint32_t imxrt_lpuart_get_src_freq(clock_ip_name_t clock_ip)
{
uint32_t freq;
+#if IMXRT_IS_MIMXRT10xx
uint32_t mux;
uint32_t divider;
+ (void) clock_ip; /* Not necessary for i.MXRT1050 */
+
mux = CLOCK_GetMux(kCLOCK_UartMux);
divider = 1;
@@ -197,10 +201,36 @@ static uint32_t imxrt_lpuart_get_src_freq(void)
divider *= CLOCK_GetDiv(kCLOCK_UartDiv) + 1U;
freq /= divider;
+#elif IMXRT_IS_MIMXRT11xx
+ /*
+ * FIXME: A future version of the mcux_sdk might provide a better method to
+ * get the clock instead of this hack.
+ */
+ clock_root_t clock_root = clock_ip + kCLOCK_Root_Lpuart1 - kCLOCK_Lpuart1;
+
+ freq = CLOCK_GetRootClockFreq(clock_root);
+#else
+ #error Getting UART clock frequency is not implemented for this chip
+#endif
return freq;
}
+static clock_ip_name_t imxrt_lpuart_clock_ip(volatile LPUART_Type *regs)
+{
+ LPUART_Type *const base_addresses[] = LPUART_BASE_PTRS;
+ static const clock_ip_name_t lpuart_clocks[] = LPUART_CLOCKS;
+ size_t i;
+
+ for (i = 0; i < RTEMS_ARRAY_SIZE(base_addresses); ++i) {
+ if (base_addresses[i] == regs) {
+ return lpuart_clocks[i];
+ }
+ }
+
+ return kCLOCK_IpInvalid;
+}
+
static void imxrt_lpuart_init_hardware(imxrt_lpuart_context *ctx)
{
(void) LPUART_Init((LPUART_Type *)ctx->regs, &ctx->config,
@@ -378,7 +408,8 @@ static void imxrt_lpuart_init_context_from_fdt(
bsp_fatal(IMXRT_FATAL_LPI2C_INVALID_FDT);
}
- ctx->src_clock_hz = imxrt_lpuart_get_src_freq();
+ ctx->clock_ip = imxrt_lpuart_clock_ip(ctx->regs);
+ ctx->src_clock_hz = imxrt_lpuart_get_src_freq(ctx->clock_ip);
LPUART_GetDefaultConfig(&ctx->config);
ctx->config.enableTx = true;
diff --git a/bsps/arm/imxrt/i2c/imxrt-lpi2c.c b/bsps/arm/imxrt/i2c/imxrt-lpi2c.c
index 783c6e18e6..d3aebc45e0 100644
--- a/bsps/arm/imxrt/i2c/imxrt-lpi2c.c
+++ b/bsps/arm/imxrt/i2c/imxrt-lpi2c.c
@@ -373,12 +373,15 @@ static int imxrt_lpi2c_hw_init(struct imxrt_lpi2c_bus *bus)
return 0;
}
-static uint32_t imxrt_lpi2c_get_src_freq(void)
+static uint32_t imxrt_lpi2c_get_src_freq(clock_ip_name_t clock_ip)
{
uint32_t freq;
+#if IMXRT_IS_MIMXRT10xx
uint32_t mux;
uint32_t divider;
+ (void) clock_ip; /* Not necessary for i.MXRT1050 */
+
mux = CLOCK_GetMux(kCLOCK_Lpi2cMux);
divider = 1;
@@ -396,6 +399,17 @@ static uint32_t imxrt_lpi2c_get_src_freq(void)
divider *= CLOCK_GetDiv(kCLOCK_Lpi2cDiv) + 1;
freq /= divider;
+#elif IMXRT_IS_MIMXRT11xx
+ /*
+ * FIXME: A future version of the mcux_sdk might provide a better method to
+ * get the clock instead of this hack.
+ */
+ clock_root_t clock_root = clock_ip + kCLOCK_Root_Lpi2c1 - kCLOCK_Lpi2c1;
+
+ freq = CLOCK_GetRootClockFreq(clock_root);
+#else
+ #error Getting I2C frequency is not implemented for this chip.
+#endif
return freq;
}
@@ -457,7 +471,7 @@ void imxrt_lpi2c_init(void)
}
bus->clock_ip = imxrt_lpi2c_clock_ip(bus->regs);
- bus->src_clock_hz = imxrt_lpi2c_get_src_freq();
+ bus->src_clock_hz = imxrt_lpi2c_get_src_freq(bus->clock_ip);
eno = imxrt_lpi2c_hw_init(bus);
if (eno != 0) {
diff --git a/bsps/arm/imxrt/mcux-sdk/drivers/qtmr_1/fsl_qtmr.c b/bsps/arm/imxrt/mcux-sdk/drivers/qtmr_1/fsl_qtmr.c
index a4e393896b..4c8bd71be5 100644
--- a/bsps/arm/imxrt/mcux-sdk/drivers/qtmr_1/fsl_qtmr.c
+++ b/bsps/arm/imxrt/mcux-sdk/drivers/qtmr_1/fsl_qtmr.c
@@ -92,9 +92,17 @@ rtems_vector_number QTMR_get_IRQ_from_fdt(const void *fdt, int node)
uint32_t QTMR_get_src_clk(TMR_Type *base)
{
+#if IMXRT_IS_MIMXRT10xx
(void) base;
return CLOCK_GetFreq(kCLOCK_IpgClk);
+#elif IMXRT_IS_MIMXRT11xx
+ (void) base;
+
+ return CLOCK_GetRootClockMux(kCLOCK_Root_Bus);
+#else
+ #error Getting Timer clock frequency is not implemented for this chip
+#endif
}
#endif /* __rtems__ */
diff --git a/bsps/arm/imxrt/spi/imxrt-lpspi.c b/bsps/arm/imxrt/spi/imxrt-lpspi.c
index 80b47f9663..62503e4bd8 100644
--- a/bsps/arm/imxrt/spi/imxrt-lpspi.c
+++ b/bsps/arm/imxrt/spi/imxrt-lpspi.c
@@ -477,12 +477,15 @@ static int imxrt_lpspi_setup(spi_bus *base)
return rv;
}
-static uint32_t imxrt_lpspi_get_src_freq(void)
+static uint32_t imxrt_lpspi_get_src_freq(clock_ip_name_t clock_ip)
{
uint32_t freq;
+#if IMXRT_IS_MIMXRT10xx
uint32_t mux;
uint32_t divider;
+ (void) clock_ip; /* Not necessary for i.MXRT1050 */
+
mux = CLOCK_GetMux(kCLOCK_LpspiMux);
switch (mux) {
@@ -504,6 +507,17 @@ static uint32_t imxrt_lpspi_get_src_freq(void)
divider = CLOCK_GetDiv(kCLOCK_LpspiDiv) + 1;
freq /= divider;
+#elif IMXRT_IS_MIMXRT11xx
+ /*
+ * FIXME: A future version of the mcux_sdk might provide a better method to
+ * get the clock instead of this hack.
+ */
+ clock_root_t clock_root = clock_ip + kCLOCK_Root_Lpspi1 - kCLOCK_Lpspi1;
+
+ freq = CLOCK_GetRootClockFreq(clock_root);
+#else
+ #error Getting SPI frequency is not implemented for this chip.
+#endif
return freq;
}
@@ -580,7 +594,7 @@ void imxrt_lpspi_init(void)
}
bus->clock_ip = imxrt_lpspi_clock_ip(bus->regs);
- bus->src_clock_hz = imxrt_lpspi_get_src_freq();
+ bus->src_clock_hz = imxrt_lpspi_get_src_freq(bus->clock_ip);
/* Absolut maximum is 30MHz according to electrical characteristics */
bus->base.max_speed_hz = MIN(bus->src_clock_hz / 2, 30000000);
bus->base.delay_usecs = 0;
--
2.35.3
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