diff options
| author | Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> | 2019-11-20 22:27:31 +0100 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2019-11-20 23:46:11 +0100 |
| commit | 64c7c8c91cc945a4e8ebb87ec33fbfed8d2b6a23 (patch) | |
| tree | 285f8ec37fff6d6bcdb5718fbcade6b4278fa916 | |
| parent | caaaf62ac89fc9b794d75cbb8c198b1684e736e1 (diff) | |
spi: cadence_qspi: support DM_CLK
Support loading clk speed via DM instead of requiring ad-hoc code.
Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
| -rw-r--r-- | drivers/spi/cadence_qspi.c | 21 | ||||
| -rw-r--r-- | drivers/spi/cadence_qspi.h | 1 |
2 files changed, 20 insertions, 2 deletions
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c index e2e54cd277..8fd23a7702 100644 --- a/drivers/spi/cadence_qspi.c +++ b/drivers/spi/cadence_qspi.c @@ -5,6 +5,7 @@ */ #include <common.h> +#include <clk.h> #include <dm.h> #include <fdtdec.h> #include <malloc.h> @@ -24,10 +25,10 @@ static int cadence_spi_write_speed(struct udevice *bus, uint hz) struct cadence_spi_priv *priv = dev_get_priv(bus); cadence_qspi_apb_config_baudrate_div(priv->regbase, - CONFIG_CQSPI_REF_CLK, hz); + plat->ref_clk_hz, hz); /* Reconfigure delay timing if speed is changed. */ - cadence_qspi_apb_delay(priv->regbase, CONFIG_CQSPI_REF_CLK, hz, + cadence_qspi_apb_delay(priv->regbase, plat->ref_clk_hz, hz, plat->tshsl_ns, plat->tsd2d_ns, plat->tchsh_ns, plat->tslch_ns); @@ -294,6 +295,8 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus) { struct cadence_spi_platdata *plat = bus->platdata; ofnode subnode; + struct clk clk; + int ret; plat->regbase = (void *)devfdt_get_addr_index(bus, 0); plat->ahbbase = (void *)devfdt_get_addr_index(bus, 1); @@ -325,6 +328,20 @@ static int cadence_spi_ofdata_to_platdata(struct udevice *bus) plat->tchsh_ns = ofnode_read_u32_default(subnode, "cdns,tchsh-ns", 20); plat->tslch_ns = ofnode_read_u32_default(subnode, "cdns,tslch-ns", 20); + ret = clk_get_by_index(bus, 0, &clk); + if (ret) { +#ifdef CONFIG_CQSPI_REF_CLK + plat->ref_clk_hz = CONFIG_CQSPI_REF_CLK; +#else + return ret; +#endif + } else { + plat->ref_clk_hz = clk_get_rate(&clk); + clk_free(&clk); + if (IS_ERR_VALUE(plat->ref_clk_hz)) + return plat->ref_clk_hz; + } + debug("%s: regbase=%p ahbbase=%p max-frequency=%d page-size=%d\n", __func__, plat->regbase, plat->ahbbase, plat->max_hz, plat->page_size); diff --git a/drivers/spi/cadence_qspi.h b/drivers/spi/cadence_qspi.h index 20cceca239..99dee75bbd 100644 --- a/drivers/spi/cadence_qspi.h +++ b/drivers/spi/cadence_qspi.h @@ -16,6 +16,7 @@ #define CQSPI_READ_CAPTURE_MAX_DELAY 16 struct cadence_spi_platdata { + unsigned int ref_clk_hz; unsigned int max_hz; void *regbase; void *ahbbase; |