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bh=lOJuGoLvCd6iC1Zgfqw7e9NKDynpvpR6Qf0qYXlBAeU=; b=kIPFFYvTijGYf52AIbOzNcDI4mFwdb1uZ1YveQS9aNd4yWtE2Qb5bWRU4X3GCZVlrEmgA2 SetnvLXuXaNRaH4MN6SUdZDURXJUCrYQDlLJ56bARxD4AU+y7V3EZ6cort/JNPD4lVwtkZ PW1o9UjGuR3QWUfK86SH5/CyvrdMMlk= From: Michael Walle To: linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 6/9] tty: serial: fsl_lpuart: add LS1028A support Date: Tue, 3 Mar 2020 18:43:03 +0100 Message-Id: <20200303174306.6015-7-michael@walle.cc> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200303174306.6015-1-michael@walle.cc> References: <20200303174306.6015-1-michael@walle.cc> MIME-Version: 1.0 X-Spamd-Bar: ++++++ X-Spam-Level: ****** X-Rspamd-Server: web X-Spam-Status: Yes, score=6.40 X-Spam-Score: 6.40 X-Rspamd-Queue-Id: 9ABA323E61 X-Spamd-Result: default: False [6.40 / 15.00]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TAGGED_RCPT(0.00)[dt]; 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Signed-off-by: Michael Walle --- drivers/tty/serial/fsl_lpuart.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index ada7fb1fa075..54af8c1927ee 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -234,6 +234,7 @@ static DEFINE_IDA(fsl_lpuart_ida); enum lpuart_type { VF610_LPUART, LS1021A_LPUART, + LS1028A_LPUART, IMX7ULP_LPUART, IMX8QXP_LPUART, }; @@ -278,11 +279,16 @@ static const struct lpuart_soc_data vf_data = { .iotype = UPIO_MEM, }; -static const struct lpuart_soc_data ls_data = { +static const struct lpuart_soc_data ls1021a_data = { .devtype = LS1021A_LPUART, .iotype = UPIO_MEM32BE, }; +static const struct lpuart_soc_data ls1028a_data = { + .devtype = LS1028A_LPUART, + .iotype = UPIO_MEM32, +}; + static struct lpuart_soc_data imx7ulp_data = { .devtype = IMX7ULP_LPUART, .iotype = UPIO_MEM32, @@ -297,7 +303,8 @@ static struct lpuart_soc_data imx8qxp_data = { static const struct of_device_id lpuart_dt_ids[] = { { .compatible = "fsl,vf610-lpuart", .data = &vf_data, }, - { .compatible = "fsl,ls1021a-lpuart", .data = &ls_data, }, + { .compatible = "fsl,ls1021a-lpuart", .data = &ls1021a_data, }, + { .compatible = "fsl,ls1028a-lpuart", .data = &ls1028a_data, }, { .compatible = "fsl,imx7ulp-lpuart", .data = &imx7ulp_data, }, { .compatible = "fsl,imx8qxp-lpuart", .data = &imx8qxp_data, }, { /* sentinel */ } @@ -307,6 +314,11 @@ MODULE_DEVICE_TABLE(of, lpuart_dt_ids); /* Forward declare this for the dma callbacks*/ static void lpuart_dma_tx_complete(void *arg); +static inline bool is_ls1028a_lpuart(struct lpuart_port *sport) +{ + return sport->devtype == LS1028A_LPUART; +} + static inline bool is_imx8qxp_lpuart(struct lpuart_port *sport) { return sport->devtype == IMX8QXP_LPUART; @@ -1622,6 +1634,17 @@ static int lpuart32_startup(struct uart_port *port) sport->rxfifo_size = UARTFIFO_DEPTH((temp >> UARTFIFO_RXSIZE_OFF) & UARTFIFO_FIFOSIZE_MASK); + /* + * The LS1028A has a fixed length of 16 words. Although it supports the + * RX/TXSIZE fields their encoding is different. Eg the reference manual + * states 0b101 is 16 words. + */ + if (is_ls1028a_lpuart(sport)) { + sport->rxfifo_size = 16; + sport->txfifo_size = 16; + sport->port.fifosize = sport->txfifo_size; + } + spin_lock_irqsave(&sport->port.lock, flags); lpuart32_setup_watermark_enable(sport);