From patchwork Sat Mar 12 09:15:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 8571151 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 90AC39F7CA for ; Sat, 12 Mar 2016 09:15:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A8AC72035E for ; Sat, 12 Mar 2016 09:15:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B488420361 for ; Sat, 12 Mar 2016 09:15:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752305AbcCLJPi (ORCPT ); Sat, 12 Mar 2016 04:15:38 -0500 Received: from sauhun.de ([89.238.76.85]:48782 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751245AbcCLJPa (ORCPT ); Sat, 12 Mar 2016 04:15:30 -0500 Received: from p4fe253ae.dip0.t-ipconnect.de ([79.226.83.174]:42582 helo=localhost) by pokefinder.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1aefdt-00068n-GM; Sat, 12 Mar 2016 10:15:25 +0100 From: Wolfram Sang To: linux-renesas-soc@vger.kernel.org Cc: Wolfram Sang , linux-mmc@vger.kernel.org, Dirk Behme , Ben Hutchings , linux-gpio@vger.kernel.org Subject: [PATCH 01/10] pinctrl: sh-pfc: r8a7790: Implement voltage switching for SDHI Date: Sat, 12 Mar 2016 10:15:03 +0100 Message-Id: <1457774112-16958-2-git-send-email-wsa@the-dreams.de> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1457774112-16958-1-git-send-email-wsa@the-dreams.de> References: <1457774112-16958-1-git-send-email-wsa@the-dreams.de> Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Wolfram Sang All the SHDIs can operate with either 3.3V or 1.8V signals, depending on negotiation with the card. Implement the {get,set}_io_voltage operations and set the related capability flag for the associated pins. Signed-off-by: Ben Hutchings Signed-off-by: Wolfram Sang Cc: linux-gpio@vger.kernel.org Reviewed-by: Geert Uytterhoeven --- Changes since RFC: * Don't export sh_pfc_phys_to_virt but use pfc->windows->virt directly. drivers/pinctrl/sh-pfc/pfc-r8a7790.c | 54 +++++++++++++++++++++++++++++++++++- 1 file changed, 53 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c index 0f4d48f9400ba0..eed8daa464cc1e 100644 --- a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c +++ b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c @@ -21,16 +21,21 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ +#include #include #include "core.h" #include "sh_pfc.h" +/* + * All pins assigned to GPIO bank 3 can be used for SD interfaces in + * which case they support both 3.3V and 1.8V signalling. + */ #define CPU_ALL_PORT(fn, sfx) \ PORT_GP_32(0, fn, sfx), \ PORT_GP_30(1, fn, sfx), \ PORT_GP_30(2, fn, sfx), \ - PORT_GP_32(3, fn, sfx), \ + PORT_GP_CFG_32(3, fn, sfx, SH_PFC_PIN_CFG_IO_VOLTAGE), \ PORT_GP_32(4, fn, sfx), \ PORT_GP_32(5, fn, sfx) @@ -4691,6 +4696,47 @@ static const char * const vin3_groups[] = { "vin3_clk", }; +#define IOCTRL6 0x8c + +static int r8a7790_get_io_voltage(struct sh_pfc *pfc, unsigned int pin) +{ + u32 data, mask; + + if (WARN(pin < RCAR_GP_PIN(3, 0) || pin > RCAR_GP_PIN(3, 31), "invalid pin %#x", pin)) + return -EINVAL; + + data = ioread32(pfc->windows->virt + IOCTRL6), + /* Bits in IOCTRL6 are numbered in opposite order to pins */ + mask = 0x80000000 >> (pin & 0x1f); + + return (data & mask) ? 3300 : 1800; +} + +static int r8a7790_set_io_voltage(struct sh_pfc *pfc, unsigned int pin, u16 mV) +{ + u32 data, mask; + + if (WARN(pin < RCAR_GP_PIN(3, 0) || pin > RCAR_GP_PIN(3, 31), "invalid pin %#x", pin)) + return -EINVAL; + + if (mV != 1800 && mV != 3300) + return -EINVAL; + + data = ioread32(pfc->windows->virt + IOCTRL6); + /* Bits in IOCTRL6 are numbered in opposite order to pins */ + mask = 0x80000000 >> (pin & 0x1f); + + if (mV == 3300) + data |= mask; + else + data &= ~mask; + + iowrite32(~data, pfc->windows->virt); /* unlock reg */ + iowrite32(data, pfc->windows->virt + IOCTRL6); + + return 0; +} + static const struct sh_pfc_function pinmux_functions[] = { SH_PFC_FUNCTION(audio_clk), SH_PFC_FUNCTION(avb), @@ -5690,8 +5736,14 @@ static const struct pinmux_cfg_reg pinmux_config_regs[] = { { }, }; +static const struct sh_pfc_soc_operations pinmux_ops = { + .get_io_voltage = r8a7790_get_io_voltage, + .set_io_voltage = r8a7790_set_io_voltage, +}; + const struct sh_pfc_soc_info r8a7790_pinmux_info = { .name = "r8a77900_pfc", + .ops = &pinmux_ops, .unlock_reg = 0xe6060000, /* PMMR */ .function = { PINMUX_FUNCTION_BEGIN, PINMUX_FUNCTION_END },